Silicon Laboratories Si2493-EVB, Si2415-EVB, Si2404-EVB, Si2457-EVB, Si2434-EVB User Manual

Si2493/57/34/15/04

Global ISOmodem-EVB

Evaluation Board for the Si2493/57/34/15/04
with a UART Interface

Description

The global Si2493/57/34/15/04-EVB evaluation board
provides the system designer an easy way of evaluating
the Si2493/57/34/15/04 ISOmodem
34/15/04-EVB consists of a motherboard with a power
supply, an RS-232 and USB interface, other ease-of­use features, and a complete removable modem
module on a daughter card. (A functional block diagram
of the Si2493/57/34/15/04-EVB is shown below.) The
Si2493/57/34/15/04 ISOmodem is a complete
controller-based modem chipset with an integrated and
programmable direct access arrangement (DAA) that
meets global telephone line requirements. Available as
a combination of one 16-pin small line-side device and
one 24-pin or 16-pin system-side device, the Si2493/57/
34/15/04 ISOmodem eliminates the need for a separate
DSP data pump, modem controller, memories, codec,
isolation transformer, relays, opto-isolators, and a 2- to
4-wire hybrid. The Si2493/57/34/15/04 is ideal for
embedded modem applications due to its small board
area, controller-based architecture, low power
consumption, and global compliance. The Si2493/57/
34/15/04-EVB provides an RJ-11 jack (for interfacing
the Si2493/57/34/15/04-EVB to the phone line), and
USB and RS232 serial ports for interfacing to a PC or
data terminal. This allows the ISOmodem to operate as
a serial modem for straightforward evaluation of the
Si2493/57/34/15/04. To evaluate the Si2493/57/34/15/
04 ISOmodem in an embedded system, the daughter
card can be used independently of or with the
motherboard. A direct access header (JP3) is available

®

. The Si2493/57/

on the motherboard to bypass the RS-232 transceivers
and connect the Si2493/57/34/15/04 ISOmodem
directly to a target system.

An on-board rectifier, filter, and voltage regulator allow
the power input to be 7.5–13 V ac or dc (either polarity)
supplied through a screw terminal (J3) or a standard
2 mm power jack (J4). Alternatively, power can be
supplied through the USB interface (whether the USB or
RS232 interface is used). The evaluation board can
drive an external speaker for call monitoring or the
piezoelectric speaker mounted directly on the board.
Please note that the PCM interface, parallel interface,
and EEPROM are available on the FT only. See
"1.7.EVB Part Numbers" on page 5 for ISOmodem EVB
options.

Features

The Si2493/57/34/15/04-EVB includes the following:

 Dual RJ-11 connection to phone line
 RS-232 and USB interface to PC
 Piezoelectric speaker for call monitoring
 Direct access to Si2493/57/34/15/04 for embedded

application evaluation

 Easy power connection to common 7.5 V–13.5 V

power supplies or USB port.

 9 V ac adaptor
 Support for daisy chain operation with Si3000 voice

codec (FT only)

 Simple installation and operation
 EEPROM (FT only)

Functional Block Diagram

9 V dc at 300 mA ac

Adaptor

Rectifier

7.5–13.5 V dc or
peak ac

USB

Connector

UART

Filter

DB9

Rev. 0.6 2/05 Copyright © 2005 by Silicon Laboratories Si2493/57/34/15/04-EVB

USB I/F

Voltage

Regulator

5 V

RS-232

Transceivers

3.3 V
Access HDR

Interface
Selecti on
Jumpers

Push Button

Reset

Power-On

Reset

Direct

PCM Data/

Control

PCM
Interboard
Connector

Si2493/57/34/15/04

RESET XTALIXTALO

Audio

Out

Audio

Amplifier

Daughter Board Boundary

AOUT

*Si3010 for Si2404

Si3018*

Interface

Circuit

RJ-11

phone

line

Si2493/57/34/15/04
Global ISOmodem-EVB

1. Si2493/57/34/15/04-EVB Setup and
Evaluation

This section explains how to set up the Si2493/57/34/
15/04-EVB for evaluation as an RS-232 or USB
interface modem. Jumper settings, power connection,
PC/terminal connections, and terminal program
configuration settings are given. The initial modem
setup after power is applied as well as a basic tutorial
on modem operation are provided. Si2493/57/34/15/04­EVB configurations for evaluating additional features
are discussed separately. See the Si2493/57/34/15 or
Si2404 data sheets and “AN93: Si2493/57/34/15/04/04
Modem Designer’s Guide” for complete details.

1.1. Si2493/57/34/15/04-EVB Quick Start—

RS-232 Interface

1. Set jumpers according to Figure 1 or Figure 2.

2. Connect:

 DB-9 to PC COM 1 (with a pass-through cable).
 RJ-11 to phone line or test box.
 9 V ac adaptor (or USB cable).

3. Bring up:

 Turn on power to modem.
 Autobaud automatically adjusts modem DTE speed and

protocol.

4. Type “AT” followed by a carriage return.

 Should echo “AT” and then an “OK”.

1.2. Si2493/57/34/15/04-EVB Quick Start—
USB Interface

1. Set jumpers according to Figure 3 or Figure 4.

2. Connect:

 USB cable to PC
 RJ-11 to phone line or test box

3. Download USB driver for your operating system from the

CD supplied with the evaluation board.

4. Install driver.

5. Bring up.

 Reset the modem.
 Autobaud automatically adjusts modem DTE speed and

protocol.

6. Type “AT” followed by a carriage return.

 Should echo “AT” and then an “OK”.

1.3. Jumper Settings

Check all jumper settings on the Si2493/57/34/15/04­EVB before applying power. The standard factory
jumper settings for the FT package are shown in
Figure 1; the FS package is shown in Figure 2. These
settings configure the Si2493/57/34/15/04-EVB for RS­232 serial operation with autobaud. Any standard
terminal program configured to communicate through a
PC COM port can be used to communicate with the
Si2493/57/34/15/04-EVB. The standard factory jumper
settings for USB operation with the FT package are
shown in Figure 3; the FS package is shown in Figure 4.
The only difference between RS-232 and USB jumper
settings is that JP5 must be installed to enable USB.

Figure 1. Standard Factory Jumper Settings—RS-232 Interface (Outlined in Gray) (FT Option)

2 Rev. 0.6

Si2493/57/34/15/04

Global ISOmodem-EVB

Figure 2. Standard Factory Jumper Settings—RS-232 Interface (Outlined in Gray) (FS Option)

Figure 3. Standard Factory Jumper Settings—USB Interface (Outlined in Gray) (FT Option)

Rev. 0.6 3

Si2493/57/34/15/04
Global ISOmodem-EVB

Figure 4. Standard Factory Jumper Settings—USB Interface (Outlined in Gray) (FS Option)

1.4. Power Requirements

The Si2493/57/34/15/04-EVB has an on-board diode
bridge, filter capacitor, and voltage regulator (U1).
Power can be supplied from any source capable of
providing 7.5 V–13 V dc or 7.5 V–13 V peak ac and at
least 100 mA. (Additional current may be required if a
speaker is connected for monitoring call progress
tones.) Power may be applied to the Si2493/57/34/15/
04-EVB through the screw terminals (J3), the 2 mm
power jack (J4), or the USB cable (even if the modem is
configured for RS-232 operation). The onboard full­wave rectifier and filter ensure the correct polarity is
applied to the Si2493/57/34/15/04-EVB. Daughter card
power is supplied through voltage regulator U2 by
connecting JP7, pins 1 and 2. Daughter card current
can be measured by connecting an ammeter between
JP7, pins 1 and 2. Failure to connect pins 1 and 2 of
JP7 through either a jumper or a low-impedance
ammeter may result in damage to the Si2493/57/34/15/
04-EVB.

1.5. Terminal and Line Connections

The Si2493/57/34/15/04 can be tested as a standard
serial data modem by connecting the Si2493/57/34/15/
04-EVB to a personal computer or other data terminal
equipment (DTE), phone line, and power. Connect a PC
serial port to the DB9 connector on the Si2493/57/34/
15/04-EVB with a pass-through cable. The RS-232
transceivers on the EVB can communicate with the DTE

at rates up to 1 Mbps. Any standard terminal program,
such as HyperTerminal or ProComm, running on a PC
communicates with the Si2493/57/34/15/04-EVB. The
standard factory jumper configuration has autobaud
enabled. Autobaud detects the DTE speed, data length,
parity, and number of stop bits.

If JP9 is installed, autobaud is disabled. Configure the
terminal emulation program to 19200 bps, eight data
bits, no parity, one stop bit, and hardware (CTS)
handshaking. Connect the RJ-11 jack on the Si2493/57/
34/15/04-EVB to an analog phone line or telephone line
simulator, such as a Teltone TLS 5.

1.6. Making Connections

With the terminal program properly configured and
running, apply power to the Si2493/57/34/15/04-EVB.
Type “AT<cr>”, and the modem should return “OK”
indicating the modem is working in the command mode
and communicating with the terminal. If the “OK”
response is not received, try resetting the modem by
pressing the manual reset switch (S1); then, again type
“AT<cr>.” Next, type “ATI6<cr>.” The modem should
respond with “2493”, “2457”, “2434”, “2415”, or “2404”
indicating the terminal is communicating with an Si2493,
Si2457, Si2434, Si2415, or Si2404.

Type “ATS0=2<cr>” to configure the modem to answer
on the second ring.

To take the modem off-hook, type “ATH1<cr>.” The
modem should go to the off-hook state, draw loop

4 Rev. 0.6

Si2493/57/34/15/04

Global ISOmodem-EVB

current, and respond with an “OK.” Next, type
“ATH<cr>” or “ATH0<cr>”, and the modem should hang
up (go on-hook) and stop drawing loop current.

To make a modem connection, type “ATDT(called
modem phone number)<cr>.” Once the connection is
established, a “CONNECT” message appears indicating
the two modems are in the data mode and
communicating. Typing on one terminal should appear
on the other terminal. To return to the command mode
without interrupting the connection between the two
modems, type “+++.” Approximately two seconds later,
“OK” appears. The modem is now in command mode
and accepts “AT” commands.Type “ATH” (or “ATH0”) to
terminate the data connection, or type “ATO” to return to
the data mode. After the ATO command, the modem
resumes the data connection and no longer accepts AT
commands.

1.7. EVB Part Numbers

The ISOmodem evaluation boards are offered in
multiple speeds and packaging options. The first four
numbers indicate the system-side device. The next two
letters indicate the system-side package (FS–Lead-free,
16-pin SOIC; FT–Lead-free, 24-pin TSSOP). The final
two numbers indicate the line-side device. See Figure 5.

Si2457FS18-EVB

LS Part Number (Si30xx)

SS Package

SS Part Number

Figure 5. EVB Part Number Example

2. Si2493/57/34/15/04-EVB
Functional Description

The Si2493/57/34/15/04-EVB is a multipurpose
evaluation system. The modem daughter card
illustrates the small size and few components required
to implement an entire controller-based modem with
global compatibility. The daughter card can be used
independently of, or in conjunction with, the
motherboard. The motherboard adds features that
enhance the ease of evaluating the many capabilities of
the Si2493/57/34/15/04 ISOmodem

2.1. Motherboard

The motherboard provides a convenient interface to the
Si2493/57/34/15/04 DC (daughter card). The versatile
power supply allows for a wide range of ac and dc

®

.

voltages to power the board. RS-232 transceivers and a
DB9 connector allow the Si2493/57/34/15/04-EVB to be
easily connected to a PC or other terminal device.
Jumper options allow direct access to the LVCMOS/TTL
level serial inputs to the Si2493/57/34/15/04, bypassing
the RS-232 transceivers or USB interface. This is
particularly useful for directly connecting the Si2493/57/
34/15/04 to embedded systems.

The Si24xxURT-EVB motherboard connects to the
daughter card through two connectors, JP1 and JP2.
JP1 is an 8x2 socket providing connection to all Si2493/
57/34/15/04 digital signals and regulated 3.3 V power
for the Si2493/57/34/15/04. The Si2493/57/34/15/04
digital signals appearing at JP1 (daughter card
interface) are LVCMOS and TTL compatible. The
Si2493/57/34/15/04 daughter card must be powered by

3.3 V. The motherboard is factory configured for 3.3 V
with JP7. JP2 is a 4x1 socket providing connection
between the daughter card and the RJ-11 phone jack.

2.1.1. Voltage Regulator/Power Supply

The input voltage to either J3 or J4 must be between 7.5
and 13.5 V dc or 7.5 and 13.5 V
motherboard includes a diode bridge (D1–D4) to guard
against a polarity reversal of the dc voltage or to rectify
an ac voltage. The power source must be capable of
continuously supplying at least 100 mA. C6 serves as a
filter cap for an ac input. The voltage regulator, U1,
provides 5 V for the motherboard and the input for
voltage regulator U2, which outputs 3.3 V for use on the
motherboard and to power the daughter card. Si24xxDC
power consumption can be measured by placing a
meter between pins 1 and 2 of JP7. The connection
between JP7 pins 1 and 2 must be made at all times
when power is applied to the evaluation board either
through a jumper block or a low-impedance meter to
avoid damage to the daughter card. Power is supplied
to U2 through D5 from the USB.

2.1.2. Reset Circuitry

The Si2493/57/34/15/04 requires a reset pulse to
remain low for at least 5.0 ms after the power supply
has stabilized during the powerup sequence or for at
least 5.0 ms during a power-on reset. Most production
Si2493/57/34/15/04 modem chipset applications require
that RESET
Si2493/57/34/15/04 operation modes, including
powerdown, require a hardware reset to recover.

The Si2493/57/34/15/04-EVB contains two reset
options, an automatic power-on reset device, U3
(DS1818) (default), and a manual reset switch (S1) to
permit resetting the chip without removing power. A
reset, regardless of the mechanism, causes all modem
settings to revert to factory default values. See

be controlled by the host processor. Certain

PEAK

ac. The

Rev. 0.6 5

Si2493/57/34/15/04
Global ISOmodem-EVB

Figure 13 on page 17 and Figure 15 on page 19 for the
reset circuit schematic.

2.1.3. DS1818

The DS1818 is a small, low-cost device that monitors
the voltage on V
V

drops below 3.0 V, the DS1818 provides a 220 ms

D

active-low reset pulse. On powerup, the DS1818 also
outputs an active low reset pulse for 220 ms after V
reaches 90% of the nominal 3.3 V value. The DS1818
outputs a 220 ms reset pulse any time the power supply
voltage exceeds the 3.3 V ±10% window.

2.1.4. Manual Reset

The manual reset switch (S1) performs a power-on
reset. This resets the Si2493/57/34/15/04 to factory
defaults without turning off power. If S1 is used in
conjunction with U3, pressing S1 activates the reset
monitor in the DS1818 and produces a 220 ms active
low reset pulse.

2.1.5. EEPROM Enable (FT Only)

Connecting JP10 enables the optional EEPROM, U9.
See “AN93: Si2457/Si2434/Si2415/Si2404 Modem
Designer’s Guide” for programming details.

2.1.6. Interface Selection

The serial interface of the Si2493/57/34/15/04-EVB can
be connected to a computer, terminal, embedded
system, or any other data terminal equipment (DTE) via
a standard RS-232 interface, USB interface, or through
a direct TTL serial interface.

The Si2493/57/34/15/04 can be tested as a standard
data modem by connecting the Si2493/57/34/15/04­EVB to a personal computer or other DTE power supply
and a phone line. A PC can communicate with the
Si2493/57/34/15/04-EVB using a standard terminal
program, such as HyperTerm or ProComm.

Jumper settings determine how the Si2493/57/34/15/
04-EVB is connected to the DTE. Table 1 lists the
interface controlled by each motherboard jumper. See
Figure 14 on page 18 and Figure 24 on page 28.

and an external reset pushbutton. If

D

Table 1. Interface Selection Jumpers

Jumper Function

JP1 Daughter Card Digital Connector.

JP2 Daughter Card Phone Line Connector.

JP3 Direct Access Header.

D

JP4 PCM Interface.

JP5 USB Enable (RS-232 Disable).

JP6 Options.

JP7 3.3 V Power for Daughter Card.

JP8 Disable both RS-232 and USB.

JP9 Autobaud disable.

JP10 EEPROM enable.

JP11 Enable 27 MHz Clock option.

JP12 Not used.

JP13 On-board speaker enable.

2.1.7. RS-232 Interface

This operation mode uses the standard factory jumper
settings illustrated in Figure 1 on page 2. The Maxim
MAX3237 transceiver interfaces directly with the TTL
levels available at the serial interface of the Si2493/57/
34/15/04 and, using internal charge pumps, makes
these signals compatible with the RS-232 standard. The
RS-232 transceiver on the Si2493/57/34/15/04-EVB can
communicate at rates between 300 bps and 1 Mbps.
This simplifies the connection to PCs and other data
terminal equipment (DTE). The signals available on the
Si2493/57/34/15/04-EVB serial interface (DB9
connector) are listed in Table 2.

2.1.8. USB Interface

The USB cable connects to J5 on the motherboard and
provides both data and power. Installing a jumper on
JP5 enables the USB interface and disables the RS-232
interface. The USB interface is provided by U5. A USB
driver for this chip is available for most PC and MAC
operating systems on the CD.

2.1.9. Direct Access Interface

The motherboard supplies power through J3, J4, or
USB, power-on reset, and an RJ-11 jack for the modem.
The direct access interface (JP3) is used to connect the
motherboard to an embedded system. JP3 provides
access to all Si2493/57/34/15/04 signals available on
the daughter card. It is necessary to install a jumper on
JP8 to disable both the RS-232 and USB interface and
prevent signal contention. Leave the jumper between
JP7 pins 1 and 2. Figures 6 and 7 illustrate the jumper
settings required for the direct access mode using the
motherboard.

6 Rev. 0.6

Si2493/57/34/15/04

Global ISOmodem-EVB

2.1.10. PCM Interface (FT Only)

The Si2493/57/34/15/04 PCM interface is available on JP4. Table 3 lists the pin connections for JP4 designed to
connect directly to the Si3000SSI-EVB JP6.

Table 2. DB9 Pin Connections

J1 Name J1 Symbol J1 Pin Si2493/57/34/15/04

Pin

Carrier Detect CD 1

Received Data RXD 2 9 RXD

Transmit Data TXD 3 10 TXD

Data Terminal Ready DTR 4* See note ESC/RI

Signal Ground SG 5 6 GND

Data Set Ready DSR 6* See note

Ready to Send RTS 7* See note

Clear to Send CTS 8 11

Ring Indicator RD 9

*Note: JP6 jumper option.

*

*

See note

17

Si2493/57/34/15/04

Name

DCD

/EESD

INT

/AOUT

RTS

/RXCLK

CTS

RI

Table 3. JP 4 PCM Interface Pin Connections

JP 4 Pin Board Signal Si24xx Pin Si24xx Signal

1 CLKOUT_H 3 CLKOUT

2 TXCLK_H 4 FSYNC

3 GND 6, 20 GND

4 GND 6, 20 GND

5 RXCLK_H 24 SDO

6 EESD_H 18 SDI

7 RESETb 12 RESET*

8 3.3 V 5, 21 VD3.3

9 GND 6, 20 GND

10 VCC (+5 V)

Rev. 0.6 7

Si2493/57/34/15/04
Global ISOmodem-EVB

Figure 6. Jumper Settings for Direct Access Interface (FT Option)

Figure 7. Jumper Settings for Direct Access Interface (FS Option)

8 Rev. 0.6

Si2493/57/34/15/04

Global ISOmodem-EVB

The block diagram in Figure 8 shows how the two evaluation boards are connected to demonstrate voice mode
operation.

Si3000SSI-EVB Motherboard

1

2

Direct Connection

RS232 Si24xx-DC

Si3000 Daughterboard

JP5

Speaker

2

SW2

JP4

SW3

1

JP6

JP4

Line

Mic

JP4

Si24xx-EVB

Line
Out

In

RJ11

Note M1 and M0
jumper settings.

Leave J3 unconnected.
Power is provided
through JP 6 connector.

J
3

J
6

J4

RJ11

J6 of Daughterboard

12V

GND

Power

Adapter

External

+12V

Supply

Use telephone in off
hook position to emulate
600 Ω Handset. Not all
handsets are
implemented as 2 wire
anymore.

Connect the telephone to RJ 11
(right side) on the Si3000
Daughterboard, NOT to the
RJ11 on motherboard. Look for
silk screen marking "HDST".

WAN

COM 1

Telephone

Windows PC

Figure 8. Connection Block Diagram for Si3000SSI-EVB and Si24XXURT-EVB

2.1.11. Voice Mode

The Si3000 is used in conjunction with the Si2493/57/34/15/04 to transmit and receive 16-bit voice samples to and
from telephone lines as shown in Figure 9.

AT commands

HOST

Responses

TDMA Interface

FSYNC MCLK

Si2457 Modem

FSYNC

SDI

SDO

SDISDO

DAA

CLKOUT

2- wire

Handset

Si3000 Voice Codec

Figure 9. Voice Mode Block Diagram

Rev. 0.6 9

Si2493/57/34/15/04
Global ISOmodem-EVB

Figure 10 shows the actual circuit connection between the Si2493/57/34/15/04 and the Si3000.

VDD

21

VD3.3

VD 3.3

CLKIN/XTALI

GND6VDA

GND

7

19

20

C51 C53

C52

U3

XTALO

C1A

C2A

VDB

Si2493/57/34/15/04

1

2

14

13

R61

VDD

C66

0.1 uF

0

XTALI

XTALO

C1A

C1B

NOTE: D6 (PIN 4) MUST NOT HAVE PULLDOWN RESISTOR

DCDb
ESC
AOUT

INTb
RIb

RTSb
RXD
TXD
CTSb

RESETb

24
23
22
15

4

16
17
18

3

8

9
10
11

12

C50

EECLK/D5
DCD/D4
ESC/D3
AOUT/INT
D6

INT/D0
RI/D1
EESD/D2

CLKOUT/EECS/A0

RTS/D7
RXD/RD
TXD/WR
CTS/CS

RESET

5

C68

0.1 uF

SPKR_R

MIC_BIAS

HDST

VDD

R62
47 k

R63
47 k

1

SPKR_R

2

MIC_BIAS

3

HDST

4

SDI

5

SDO

6

FSYNC

7

MCLK

8

SCLK

Si3000

SPKR_L

LINEO

MIC_IN

RESET

LINEI

16

15

14

GND

13

VA

12

VD

11

10

9

SPKR_L

LINEO

LINEI

MIC_IN

Figure 10. Circuit Connection between the Si2493/57/34/15/04 and the Si3000

To use voice mode register U71 and data memory location 0x0059 must be properly configured.

Setting data memory 0x0059 = 0x0001 enables the Si24XX TDMA interface. When U71 is set to the value 0x0011
a 16-bit voice sample will be transmitted from the Si3000 through the Si2493/57/34/15/04 and DAA to the remote
device. Likewise, an analog signal from the remote device will pass through the DAA where it is converted to a 16­bit voice sample, the Si24XX and finally the Si3000 where it is converted back to the analog receive signal.

In this example, the Si3000 has its digital TDMA interface configured as the Slave Serial Mode by adding a 50 kΩ
pull-down resistor to SDO pin and a pull-up 50 kΩ resistor to SCLK pin. In this mode, the Si3000’s MCLK is driven
by the 2048 kHz clock from Si2493/57/34/15/04. The FSYNC has an 8 kHz pulse input. The bit clock is 2048/
8 = 256 bits per frame sync. Refer to the Si3000 documentation for further details.

To send control information to the Si3000, the Si2493/57/34/15/04 modem chip provides a PCM control port
0x004B that allows the user to send control words across by using the AT memory write command. See Table 4. for
details. Wait for the “OK” (approximately 300 ms after each command). When a connection is established, the “AT.”
command is used to generate the DTMF tone of a number; For example, AT.3<CR> will generate a number 3
DTMF tone without the need for an external DTMF generator. See “Voice Mode Example” for details.

10 Rev. 0.6

Si2493/57/34/15/04

Global ISOmodem-EVB

Table 4. Voice Commands

AT Commands Purposes

AT:U71,11 Configure modem to send/receive data in linear mode to/from Si3000

interface

AT*Y254:W0059,7785 Enable Si2457 modem TDMA’s interface by setting LSBit of memory

0x0059

AT*Y254:W004B,011C Write to Si3000 Control Reg1: Line Driver, Handset Driver, and Micro-

phone Bias Normal Operations are enabled.

AT*Y254:W004B,0200 Write to Si3000 Control Reg2: HPF enabled, PLL divided by 5, Digital

Loopback Off

AT*Y254:W004B,0300 Write to Si3000 Control Reg3: PLL Divider N1

AT*Y254:W004B,0400 Write to Si3000 Control Reg4: PLL Divider M1

AT*Y254:W004B,055A Write to Si3000 Control Reg5: Line-In, Mic-In, Handset-In, FIR are acti-

vated.

AT*Y254:W004B,067F Write to Si3000 Control Reg6: Line-Out, Handset-Out are activated.

AT*Y254:W004B,075F Write to Si3000 Control Reg7: SPKR_L, SPLR_R are activated.

ATH1 Off-hook command for calling

AT.1 Dial individual number 1

AT.0 Dial individual number 0

AT.4 Dial individual number 4 and wait for answer

Rev. 0.6 11

Si2493/57/34/15/04
Global ISOmodem-EVB

2.2. Voice Mode Example

Perform the following steps:

1. Connect hardware as shown in Figure 8 on page 9. Note that the Si3000 Evaluation Board requires an external 12 V supply
and derives 5 V power from the Si24xx-EVB. The Si24xx-EVB should be connected to the supplied power adapter or
powered through USB.

2. Enter the following AT commands to initialize the modem:

ATZ reset modem

ATE0 disable echo

AT:U0071,11 enable voice routing firmware

AT*Y254:W0059,7785 enable Si3000 Hardware Interface

In actual application, this line
must be implemented as a read-modify­write consisting of the following:
n = AT*Y254:Q0059

n |= 1

AT*Y254:W0059,n

AT*Y254:W004B,011C Si3000 Reg 01 = 1C

This applies power to SPKRx,HDST,LINEO

AT*Y254:W004B,0545 Si3000 Reg 05 = 45

Enable HDST into ADC mixer
MIC input disabled
LINEI input disabled

AT*Y254:W004B,065D Si3000 Reg 06 = 6D

Activate HDST as output
Keep LINEO muted

0 db Receive Gain Setting

AT*Y254:W004B,075C Si3000 Reg 07 = 5C

0 dB Transmit Gain
Keep SPKRx muted

3. Type "ATDTnnn", where nnn represents the telephone number of the remote telephone.

4. The remote phone rings and should be picked up.

5. Also pick up the local phone connected to the Si3000 Evaluation Board.

6. At this point, a voice connection exists between the two telephones.

7. It is also possible to send a series of single digit DTMF tones to the remote phone using the "AT.N" command (dot character
is in-between "AT" and "N", where N is a DTMF digit 0-9,A-F).
Example:
AT.1 sends DTMF digit 1, return to voice mode.

12 Rev. 0.6

Si2493/57/34/15/04

Global ISOmodem-EVB

2.2.1. Audio Output

Audio output is provided from the Si2457/34/15 on the
AOUT pin. This signal allows the user to monitor call
progress signals, such as dial tone, DTMF dialing, ring,
busy signals, and modem negotiation. Control of this
signal is provided by AT commands and register
settings described in the introduction. The AOUT signal
can be connected to an amplifier, such as the LM386
(the default stuffing option on the Si2457/34/15URT­EVB), for high-quality output. AOUT can also be
connected to a summing amplifier or multiplexer in an
embedded application as part of an integrated audio
system.

2.2.2. Amplifier (LM386)

The audio amplifier circuit consists of U10 (LM386),
C20, R3, R4, C21, C22, C23, R5, C24, and an optional
loudspeaker, LS1. The LM386 has an internally-set
voltage gain of 20. R3 and R4 provide a voltage divider
to reduce the AOUT signal to prevent overdriving the
LM386. C20 provides dc blocking for the input signal
and forms a high-pass filter with R3+R4 while R4 and
C21 form a low-pass filter. These four components limit
the bandwidth of the AOUT signal. C22 provides high­frequency power supply bypassing for the LM386 and
should be connected to a hard ground and located very
close to the amplifier’s power supply and ground pins.
C23 and R5 form a compensation circuit to prevent
oscillation of the high current PNP transistor in the
LM386 output stage on negative signal peaks. These
oscillations can occur between 2–5 MHz and can pose
a radiation compliance problem if C23 and R5 are
omitted. C24 provides dc blocking for the output of the
LM386, which is biased at approximately 2.5 V (V
and forms a high-pass filter with the impedance of the
loudspeaker (LS1). The output from the LM386 amplifier
circuit is available on the RCA jack, J2 (not installed).
Install jumper JP13 to enable the on-board speaker,
LS1.

CC

/2),

2.3. Modem Module Operation

The Si2457/34/15URT-EVB daughter card is a complete
modem solution perfectly suited for use in an embedded
system.

The daughter card requires a 3.3 V supply capable of
providing at least 35 mA and communicates with the
system via LVCMOS/TTL-compatible digital signals on
JP1. The RJ-11 jack (TIP and RING) is connected via
JP2. Be sure to provide the proper power-on reset pulse
to the daughter card if it is used in the stand-alone
mode.

2.3.1. Reset Requirements

The Si2457/34/15 ISOmodem
properly reset at powerup. The reset pin (pin 8) of the
Si2457/34/15 (JP1, pin 13) must be held low for at least

5.0 ms after power is applied and stabilized to ensure
the device is properly reset.

2.3.2. Crystal Requirements

Clock accuracy and stability are important in modem
applications. To ensure reliable communication between
modems, the clock must remain within ±100 ppm of the
design value over the life of the modem. The crystal
selected for use in a modem application must have a
frequency tolerance of less than ±100 ppm for the
combination of initial frequency tolerance, drift over the
normal operating temperature range, and five year
aging. Other considerations, such as production
variations in PC board capacitance and the tolerance of
loading capacitors, must also be taken into account.

2.3.3. Protection

The Si2493/57/34/15/04-EVB meets or exceeds all FCC
and international PTT requirements and
recommendations for high-voltage surge and isolation
testing without any modification. The protection/isolation
circuitry includes C1, C2, C8, C9, FB1, FB2, and RV1.
The PCB layout is also a key “component” in the
protection circuitry. The Si2493/57/34/15/04-EVB
provides isolation to 3 kV. Contact Silicon Laboratories
for information about designing to higher levels of
isolation.

®

daughter card must be

3. Design

The following sections contain the schematics, bill of
materials, and layout for the Si2493/57/34/15/04
including the daughter card and motherboard.

Rev. 0.6 13

Si2493/57/34/15/04
Global ISOmodem-EVB

TIP

RING

JP2

These components

for internal

Silabs use only.

C1A

C2A

R19

0

AOUT

DCDb

INTb

EESD

R20

R23

R21

R22

RIb

C41

C40

Y1

12

C52

XTALI

XTALO

1

C50

VDD

2

XTALO

U1

CLKIN/XTALI

VD3.3

4

GPIO3/ESC

GPIO2/CD15GPIO1/EOFR/RXCLK

14

16

ESC

RXCLK

DCDb

AOUT

"Si24xx2G-DC Rev. 1.0 ISOmodem TM"

C1A

10

C1A

GPIO5/RI/TXCLK

RXD5TXD6CTS7RESET

GPIO4/INT/AOUT

3

11

RXD

TXD

TXCLK

CTSb

C1A

14

C1A

CLKOUT/A0/EECS

RTS/D7

CTS/CS/ALE

RXD/RD9TXD/WR10RESET

8

3

11

12

RXD

RTSb

RESETb

CLKOUT

TXD

CTSb

TXD

GPIO5/RIb/TXCLK-RXD

Si2401

Pin

135791113248101214

JP1 Function

C2A

13

C2A

VDB

19

VDA

7

GND

20

GND

6

CTSb

RESETb-GPIO1/EOFR/RXCLK

C2A

C51

9

C2A

VA

VDA

13

GND

12

Si2401

8

RESETb

RXCLK

JP1

CLKOUT

VDD

Overlap the 16-pin SOIC and 24-pin TSSOP

RIb

ESC

INTb

EESD

AOUT

DCDb

246

8

101214

16

135791113

15

RXD

TXCLK

RTSb

TXD

CTSb

RESETb

FB5

R18

1.3 k

+

VDD

HEADER 8X2

C56

C55

C54

XTALI

XTALO

1

2

VD 3.3

VD3.3

24

RXCLK

DCDb

CLKIN/XTALI

alt_RI/D6/TXCLK

ESC/D322DCD/D423EECLK/D5/RXCLK

AOUT/INT15INT/D0

4

ESC

AOUT

TXCLK

XTALO

16

INTb

RI/D117EEIO/D2

18

RIb

EESD

U3

21
5

GPIO3/ESC-GPIO2/DCDb

C53

VDA

GPIO4/INTb/AOUT

-

-

16

These components

for internal

Silabs use only.

Figure 11. Si2493/57/34/15/04 Schematic

14 Rev. 0.6

Si2493/57/34/15/04

Global ISOmodem-EVB

RING

R16

No Ground Plane In DAA Section

TIP

RV1

C8

C9

R6

C10

FB1

C3

R3 R15

Q3

R30, R31, R32, R33, C30 and C31

Z1

are an optional CID population

Q2

FB2

-+

D1

Hookswitch

Q1

R5

R4

C7

R10

R11

DC Term

+

C4

3

RX

U2

Q5

R1

2

DCT

14

DCT3

C1B5C2B

C1

R12

R2

C2

R13

Q4

12

1

13

16

QE2

QE

Bias

QB

DCT2

6

R8

R7

Ring Detect/CID

8

9

Si3010/18

SC

11

RNG1

RNG2

IGND

IB

VREG

VREG2

4

7

10

15

C6

C5

R9

Figure 12. Si3018/10 DAA Schematic

C1A

C2A

Rev. 0.6 15

Si2493/57/34/15/04

y

y

Global ISOmodem-EVB

4. Bill of Materials: Si24xx Daughter Card

Item Quantit

1 2 C2,C1 33 pF Y2 ±20% 1808 X7R GA342D1XGF330JY02L Murata
2 1 C3 10 nF 250 V ±20% 0805 X7R C0805X7R251-103MNE Venkel
3 1 C4 1.0 uF 50 V ±20% Size A Al

4 3 C5,C6,C50 0.1 uF 16 V ±20% 0603 X7R C0603X7R160-104MNE Venkel
5 1 C7 2.7 nF 50 V ±20% 0603 X7R C0603X7R500-272MNE Venkel
6 2 C9,C8 680 pF Y3 ±10% 1808 X7R GA342QR7GD681KW01L Murata
7 1 C10 0.01 uF 16 V ±20% 0603 X7R C0603X7R160-103MNE Venkel
8 2 C41,C40 33 pF 16 V ±5% 0603 NPO C0603NPO160-330JNE Venkel

9 1 C51 0.22 uF 16 V ±20% 0603 X7R C0603X7R160-104MNE Venkel
10 1 C54 1.0 uF 10 V ±10% Case A Tant TA010TCM105-KAL Venkel
11 1 D1 HD04 400 V Mini-DIP HD04-T Diodes, Inc.
12 2 FB1,FB2,FB5 Ferrite Bead 0603 BLM18AG601S MuRata
13 1 JP1 HEADER 8X2 2x8 Surface Mount

14 1 JP2 4X1 Header_0 CONN1X4-100-

15 2 Q3,Q1 NPN 300 V SOT-23 MMBTA42LT1 OnSemi
16 1 Q2 PNP 300 V SOT-23 MMBT A92LT1 OnSemi
17 2 Q4,Q5 NPN 80 V SOT-23 MMBTA06LT1 OnSemi
18 1 RV1 SiDactor 275 V 100 A SOD 6 P3100SB Teccor
19 1 R1 1.07 K 1/2 W ±1% 1210 CR1210-2W-1071FT Venkel
20 1 R2 150 1/16 W ±5% 0402 CR0402-16W-150JT Venkel
21 1 R3 3.65 K 1/2 W ±1% 1210 CR1210-2W-3651FT Venkel
22 1 R4 2.49 K 1/2 W ±1% 1210 CR1210-2W-2491FT Venkel
23 2 R5,R6 100 K 1/16 W ±5% 0402 CR0402-16W-104JT Venkel
24 2 R8,R7 20 M 1/8 W ±5% 0805 CR0805-8W-206JT Venkel
25 1 R9 1 M 1/16 W ±1% 0402 CR0402-16W-1004FT Venkel
26 1 R10 536 1/4 W ±1% 1206 CR1206-4W-5360FT Venkel
27 1 R11 73.2 1/2 W ±1% 1210 CR1210-2W -73R2FT Venkel
28 4 R12,R13,R15,R16 0 1/16 W ±1% 0603 CR0603-16W-000F Venkel
29 1 U3 Si24xx 24pin TSSOP Silicon Laboratories
30 1 U2 Si3018/10 16pin SOIC Si3018/10-FS Silicon Laboratories
31 1 Y1 4.9152Mhz 20pF load,

32 1 Z1 43 V 1/2 W SOD-123 MMSZ43T 1 OnSemi

Reference

Value Rating Tolerance Foot Print Dielectric Manufacturer Number Manufacturer

NACE1R0M50V NIC Components

tic

TSM-108-01-T-DV Samtec

68000-403 Berg

150 ESR

Electrol

Header, .1 space

SMT

50 ppm ATS-SM 559-FOXSD049-20 C TS Reeves

Non-installed Components

33 2 C31,C30 120pF 250 V ±10% 0805 X7R C0805X7R251-121KNE Venkel
34 2 C55,C56 0.1 uF 10 V ±20% C0603 X7R C0603C124K Kemet
35 1 R18 1.3 k 1/16 W ±5% RC0603 CR0603-16W-132JT Venkel
36 5 R19,R20,R21,R22,R23 0 1/16W ±5% RC0603 CR0603-16W-000J Venkel
37 2 R32,R30 15M 1/8 W ±5% 0805 CR0805-8W-156JT Venkel
38 2 R33,R31 5.1M 1/8 W ±5% 0805 CR0805-8W-515JT Venkel
39 1 C52 0.1 uF 16 V ±20% 0603 X7R C0603X7R160-104MNE Venkel
40 1 C53 0.22 uF 16 V ±20% 0603 X7R C0603X7R160-104MNE Venkel
41 1 U1 Si2401 16pin SOIC Si2401-KS Silicon Laboratories

16 Rev. 0.6

Si2493/57/34/15/04

Global ISOmodem-EVB

TP8

"RING"

TP7

"TIP""PCM"

Daughter Card Socket

VCC

+3.3V

JP4

Right angle connector on board edge

B5

RTS_H

CLKOUT_H

TXCLK_H

R6 0

R7 0

1 2

3 4

5 6

7 8

9 10

HEADER 5X2

R2

RESETb

1234567891011

RJ11

TIP

RXD_H

CTS_H

RESET_H

TXD_H

"RXCLK"

JP3

"CLKOUT"

RI_H

DCD_H

ESC_H

EESD_H

RXCLK_H

DCD_H

"DCDb"

"RIb"

"ESC"

"EESD"

246

8

101214

135791113

"RXD"

"TXD"

"CTSb"

"RTSb"

"TXCLK"

TXCLK_H

RING

AOUT_H

INT_H

AOUT_H

"INT"

"AOUT"

16

15

"RESETb"

RESETb

12

EESD_H
EECLK_H
EECS_H

JP6

Place White Dot

HEADER 8X2

R27 0

EESD_H

1

234

Silkscreen Near

Pin 1

2

SDO

SDI5HOLD7SCLK6WP3VCC

U9

+3.3V

9

567

LS1

Speaker

0

R9

J2

"EEPROM"

CS

1

8

8

10

111213

JP13

C32

B6

15

Place White Dot

Silkscreen Near

Pin 1

14

Table on silkscreen for JP6

AOUT SPEAKER

Info

Function

CD nc or GPIO2 DCD or EEIO GPIO2 or nc

RS-232 Si2400 only Si2456/57 Si2401

Info

RI GPIO3 or nc RI or TXCLK n c or GPIO5

RCA JACK

NI

Speaker

GPIO1 or GPIO3

"Si2401: 1-2, 5-6, 7-8, 11-12, 14-15"

"Si2400: 2-3, 4-5, 8-9, 11-12, 13-14"

"Si24xx: 1-2, 4-5, 7-8, 10-11, 13-14"

"Si24xx alt: 1-2, 5-6, 7-8, 11-12, 14-15"

"JP6: recommended settings"

Ctrl

Ctrl

Info GPIO4 or AOUT INT or AOUT nc or GPIO4

DTR E SC or X GPIO3 or nc

RTS CLKOUT or nc RTS or RXCLK nc or GPIO1

DSR

R28

AOUT_H

Si2401 Reset Options

R12

DCD_HEESD_H TXCLK_H

R11

10k

"Si2401 27MHz CLK"

10k

JP11

10k

JP10 JP12

B1

TXD_R

DTR_R

RXD_R

CD_R

B4 UART Mux

R10NI

RS-232

CD(o)1RXD(o)2TXD(i)3DTR(i)4SG

RXD_T

RXD_T

DSR_R

6

DSR(o)

VD

TXD_T

TXD_TRTS_R

7

RTS(i)

CTS_T

CTS_T

CTS_R

8

CTS(o)

RTS_T

RTS_T

RD_R

9

RD(o)

R10

10k

"USB"

CD_U

CD_U

DSR_M

S

OE

RI_U

RI_U

JP5

JP8

"Mux off"

R8

1.3k

VCC

USB

B3 PowerBlock

VD

+3.3V

V1

USB_+5

Power Connector

1

J3

"7-12V AC or DC"

JP7 for measuring

2

RI_M

RXD_U

RXD_U

TXD_U

TXD_U

USB

J5

USB Type B

CD_M

CTS_U

CTS_U

123

RTS_U

RTS_R

USB-

USB+

DSR_U

DSR_U

4

DTR_M

DTR_U

DTR_U

RTS_M

5

CTS_M

TXD_M

RXD_M

DTR_T

DSR_T

CD_T

RI_T

RI_T

CD_T

DTR_T

DSR_T

RS-232

B2

J1

DB9-RS232_1

M211M1

5

10

JP9

Si24xx Reset Options

current to modem (i.e.

VD goes to modem only)

JP7

RESETb

RESET

V2

1

2

J4

"AUTOBAUD" "EEPROM" "27MHz CLK"

Figure 13. Motherboard Top-level Schematic

S1

"RESET"

SW PUSHBUTTON

2.1 mm Power jack

Rev. 0.6 17

Si2493/57/34/15/04
Global ISOmodem-EVB

RING

TIP

JP2

VD

Place White Dot

Silkscreen Near Pin 1

R26

1.3k

R17

10k

TIP and RING minimum 20 mils wide and as far as possible from ground.

Connectors for ISOModem module.

ESC_H

AOUT_H

INT_H

EESD_H

RXCLK_H

246

135791113

JP1

EECS_H EECLK_H

CLKOUT_H

DCD_H

8

RTS_H

RXD_H

TXCLK_H

RI_H

101214

TXD_H

CTS_H

NC

Si2401

16

15

SOCKET 8X2

C4

470 pF

+

C3

1.0 uF

FB2

C2

470 pF

RESET_H

+

Net names correspond to

Si24xx. See table for

CLKOUT/A0/EECS

Si24xx

Si24001NC

Table NOT on silkscreen

JP1/3

Si2400 equivalents

TXD

GND

GPIO5

NC

GPIO2

GPIO1

TXD/WR

GND

alt_RIb/TXCLK/D6

RTS/D7

DCD/D4

EECLK/D5/RXCLK

TXD

GND

NCNCCLKOUT

NC

345

2

GPIO3

RXDNCCTSNCRESET

ESC/D3

RXD/RD

EESD/D2

CTS/CS

RI/D1

GPIO1

RXD

GPIO2

CTS

GPIO3

11

12

910786

NCVDGPIO4

RESET

INT/D0VDAOUT/INT

RESET

GPIO4VDAOUT

15

16

13

14

Figure 14. Daughter Card Interface Schematic

VD

18 Rev. 0.6

C1

1.0 uF

Si2493/57/34/15/04

Global ISOmodem-EVB

RESET

1

RST

VCC2GND

3

C11

470 pF

DS1818

R15 0

C10

10 uF

R14

196k

R16

110k

7

8

5

U3

OPTIONAL

VD

+3.3V

TP17

"+3.3V"

FB/NC

OUT(1)6OUT(2)

U2

RESET/PG

"+5V"

TP16

VCC

USB_VCC

FB1

C5

10 nF

USB_+5

GND1EN2IN(1)3IN(2)

BAT54C

U1

D2

D1

R13

3

OUT

IN

1

12

TPS77601DR

4

C9

0.1 uF

D5

C8

10 uF

"GND"

"GND"

"GND"

TP1

TP2

GND

7805

2

0.1 uF

C7

C6

470 uF

+

TP3

1.6

D4

D3

Standoffs in each corner of board.

TP18

TP4

TP6

TP5

Figure 15. Power Supply Schematic

V1

V2

Rev. 0.6 19

Si2493/57/34/15/04
Global ISOmodem-EVB

U4

26

C16

C15

+

28

C1+

1.0 uF

0.1 uF

C14

C18

25

C1-

VCC

V+27V-

C17

CTS_T

RI_T

DSR_T

CD_T

TP11

TP10

16

17

R1OUTB

12

TXD_T

RTS_T

DTR_T

R29

13

18

R1OUT21R2OUT20R3OUT

R1IN8R2IN9R3IN11MBAUD15SHDN

EN

14

VCC

10k

MAX3237

GND

2

10k

R32

R30

10k

R33

NI

10k

R31

10k

NI

RXD_T

C19

3

1

C2-

C2+

T1IN24T2IN23T3IN22T4IN19T5IN

4

T1OUT5T2OUT6T3OUT7T4OUT10T5OUT

VCC

FB3

470 pF

C13

MMBZ15VDC

+

C12

1.0 uF

D13

MMBZ15VDC

D12

Figure 16. RS-232 Interface Schematic

MMBZ15VDC

D11

MMBZ15VDC

D10

D9

MMBZ15VDC

D8

MMBZ15VDC

D7

MMBZ15VDC

D6

MMBZ15VDC

20 Rev. 0.6

DTR_R

RTS_R

RXD_R

CTS_R

CD_R

RD_R

DSR_R

TXD_R

AOUT

C20

0.1 uF

47 k

R3

Global ISOmodem-EVB

VCC

C22

0.1 uF

6

1

3

+

7
2

-

4

R4
3 k

C21

820 pF

Figure 17. Audio Amplifier Schematic

U10
LM386M-1

8

5

Si2493/57/34/15/04

C24

+

C23

0.1 uF

R5

10

1 2

100 uF

SPEAKER

TXD_U

RXD_U

RTS_U

CTS_U

TXD_T

RXD_T

RTS_T

CTS_T

DTR_U
DSR_U
CD_U
RI_U

DTR_T
DSR_T
CD_T
RI_T

"CTS_U"

TP12

TP15

"CTS_T"

"RXD_U"

TP13

TP14

"RXD_T"

2

1B1

5

2B1

11

3B1

14

4B1

3

1B2

6

2B2

10

3B2

13

4B2

74CBT3257/SO

2

1B1

5

2B1

11

3B1

14

4B1

3

1B2

6

2B2

10

3B2

13

4B2

74CBT3257/SO

U7

U8

1A
2A
3A
4A

OE

1A
2A
3A
4A

OE

4
7
9
12

15
1

S

4
7
9
12

15
1

S

VCC

R18
10k

TXD_M

RXD_M

RTS_M

CTS_M

DSR_M
CD_M
RI_M

DTR_M

S

O\E\

R19
10k

Figure 18. UART Mux Schematic

Rev. 0.6 21

Si2493/57/34/15/04
Global ISOmodem-EVB

USB_VCC

+

C29

1.0 uF

U11

1

2

3

GMS05F

5

USB-

4

USB+

C31

U5

8

VBUS

7

REGIN

VDD

GND

D­D+

SUSPEND

SUSPEND

CP2101/02

6

3

5
4

RST

DCD
DTR
DSR
TXD
RXD
RTS
CTS

9

12

11

2

RI

1
28
27
26
25
24
23

R20

4.7 k

TP19

RI_U

CD_U

DTR_U

DSR_U

TXD_U

RXD_U

RTS_R

CTS_U

Figure 19. USB Interface Schematic

22 Rev. 0.6

5. Bill of Materials: Si24xx Motherboard

y

Si2493/57/34/15/04

Global ISOmodem-EVB

Item Quantit

1 5 C1,C3,C12,C15,C29 1.0 uF 10 V ±10% 3216_EIAA Tant TA010TCM105-KAL Venkel
2 4 C2,C4,C11,C13 470 pF 25V ±5% CC0805 X7R C0805C471J5GACTU TTI
3 1 C5 10 nF 16 V ±10% CC0603 X7R C0603X7R160-103KNE Venkel
4 1 C6 470 uF 25 V ±20% C5X10MM-RAD Electrolytic UVX1E471MPA NIC Components
5 2 C7,C9 0.1 uF 25 V ±10% CC0805 X7R C0805X7R250-104KNE Venkel
6 2 C10,C8 10 uF 16V ±10% CC1206 X7R C1206X7R100-106KNE Venkel
7 10 C14,C16,C17,C18,C19,C2

8 1 C21 820 pF 50 V ±5% CC0805 NPO C0805COG500-821JNE Venkel

9 1 C24 100 uF 16 V ±10% C2.5X6.3MM-RAD Electrolytic UVX1C101MEA1TD Nichicon
10 4 D1,D2,D3,D4 DIODE 30 V 0.5 A SOD123 MBR0530T1 Motorola
11 1 D5 BAT54C SOT-23 BAT54C Diodes Inc.
12 8 D6,D7,D8,D9,D10,D11,D1

13 3 FB1,FB2,FB3 Ferrite Bead RC0805 BLM21A601S Murata
14 1 JP1 SOCKET 8X2 CONN2X8 SSW-108-01-T-D Samtec
15 1 JP2 4X1 Socket CONN4[6238] SSW-104-01-T-S Samtec
16 1 JP3 HEADER 8X2 CONN2X8 517-6121TN Samtec
17 1 JP4 HEADER 5X2 CONN2X5[6238]RA TSW-105-25-T-D-RA Samtec

18 8 JP5,JP7,JP8,JP9,JP10,JP

19 1 JP6 3x5 Header CONN3X5
20 1 J1 DB9-RS232_1 CONN9[6543]DBF K22-E9S-030 Kycon
21 1 J2 RCA JACK CONN2[12090]RC

22 1 J3 Power Connector TB2[12065]TSA 506-5ULD02 Mouser

23 1 J4 2.1 mm Power

24 1 J5 USB Type B CONN-USB-B 897-30-004-90-000000 Mill-Max
25 1 LS1 Speaker HCM12A[9052] HCM1206A JL World
26 1 RJ11 MTJG-2-64-2-2-1 RJ11[6238]DUAL MTJG-2-64-2-2-1 Adam Tech
27 6 R2,R6,R7,R9,R15,R27 0 1/10 W RC0603 CR0603-10W-000JT Venkel
28 1 R3 47 k 1/10 W ±5% RC0805 NRC10J473TR NIC Components
29 1 R4 3 k 1/10 W ±5% RC0805 NRC10J302TR NIC Components
30 1 R5 10 1/10 W ±1% RC0805 NRC10F10R0TR NIC Components
31 2 R26,R8 1.3k 1/16 W ±5% RC0603 CR0603-16W-132JT Venkel
32 10 R10,R11,R12,R17,R18,R1

33 1 R13 1.6 1/8 W -0.05 RC1206 CR1206-8W-1R6JT Venkel
34 1 R14 196k RC0805 MCHRIDEZHFX1963E Classic Comp
35 1 R16 110k RC0805 CR21-114J-T Classic Comp
36 1 R20 4.7 k 1/10 W ±5% RC0805 NRC10J472TR NIC Components
37 1 S1 SW

38 3 TP1,TP2,TP18 Black Test Point CONN1[6040] 151-203 Mouser
39 4 TP3,TP4,TP5,TP6 Stand off MH-125
40 8 TP7,TP8,TP10,TP11,TP12,

41 2 TP16,TP17 Red Test Point CONN1[6040] 151-207 Mouser
42 1 TP19 Blue Test Point CONN1[6040] 151-207 Mouser
43 1 U1 7805 TO-220-LD uA7805CKC Texas Instruments
44 1 U2 TPS77601DR SO8 TPS77601DR Texas Instruments
45 1 U3 DS1818 SOT-23 DS1818-10 Dallas Semiconductor
46 1 U4 MAX3237 SOP65X780-28N MAX3237E (Sipex

47 1 U5 CP210
48 2 U8,U7 74CBT3257/SO SOP65X780-16N SN74CBT3257DBR Texas Instruments
49 1 U9 PDIP Socket DIP8-SKT 210-93-308-41-001000 Mill-Max
50 1 U10 OP-AMP SO8 LM386M-1 National Semi
51 1 U11 GMS05F SOT-23-5N GMS05F Vishay

Reference

0,C22,C23,C31,C32

2,D13

11,JP12,JP13

9,R28,R29,R30,R33

TP13,TP14,TP15

Value Rating T olerance Foot Print Dielectric Manufacturer Number Manufacturer

0.1 uF 16 V ±20% CC0603 X7R C0603X7R160-104MNE Venkel

MMBZ15VDC SOT-23 MMBZ15VDC General Semiconductor

2X1 Header CONN2[6040] 517-611TN Berg

A

jack

10k 1/16 W ±5% RC0603 CR0603-16W-103JT Venkel

PUSHBUTTON

Blue Test Point CONN1[6040] 151-205 Mouser

1/02 28-pin MLP CP2101/02 Silicon Laboratories

CONN3[175120]P

WR

SW4[6240]PB 101-0161 Mouser

16PJ097 Mouser

ADC-002-1 Adam Tech

Maxim

SP3238E 2nd source)

Rev. 0.6 23

Si2493/57/34/15/04
Global ISOmodem-EVB

24 Rev. 0.6

Figure 20. Daughter Card Component Side Silkscreen

Si2493/57/34/15/04

Global ISOmodem-EVB

Figure 21. Daughter Card Solder Side Silkscreen

Rev. 0.6 25

Si2493/57/34/15/04
Global ISOmodem-EVB

26 Rev. 0.6

Figure 22. Daughter Card Component Side Layout

Si2493/57/34/15/04

Global ISOmodem-EVB

Figure 23. Daughter Card Solder Side Layout

Rev. 0.6 27

Si2493/57/34/15/04
Global ISOmodem-EVB

28 Rev. 0.6

Figure 24. Motherboard Silkscreen

Si2493/57/34/15/04

Global ISOmodem-EVB

Figure 25. Motherboard Silkscreen (Back Side)

Rev. 0.6 29

Si2493/57/34/15/04
Global ISOmodem-EVB

30 Rev. 0.6

Figure 26. Motherboard Component Layout

Si2493/57/34/15/04

Global ISOmodem-EVB

Figure 27. Motherboard Solder Side Layout

Rev. 0.6 31

Si2493/57/34/15/04
Global ISOmodem-EVB

32 Rev. 0.6

Figure 28. Motherboard Ground Plane Layout

Si2493/57/34/15/04

Global ISOmodem-EVB

Figure 29. Motherboard Power Plane Layout

Rev. 0.6 33

Si2493/57/34/15/04
Global ISOmodem-EVB

6. Complete Design Package on CD (See Sales Representative for Details)

Silicon Laboratories can provide a complete design package of the Si2493/57/34/15/04-EVB including the
following:

 OrCad Schematics
 Gerber Files
 BOM
 Documentation

Please contact your local sales representative or Silicon Laboratories headquarters sales for ordering information.

34 Rev. 0.6

DOCUMENT CHANGE LIST

Revision 0.2 to Revision 0.3

 Updated Figure 21, “Daughter Card Solder Side

Silkscreen,” on page 25

 Updated Figure 22, “Daughter Card Component

Side Layout,” on page 26

 Updated Figure 23, “Daughter Card Solder Side

Layout,” on page 27

 Updated “Bill of Materials: Si24xx Daughter Card”

Revision 0.3 to Revision 0.4

 Changed from Rev.1.0 to Rev.1.1 Daughter Card

Revision 0.4 to Revision 0.5

 Changed from Rev.3.1 to Rev.3.2 Motherboard

Revision 0.5 to Revision 0.6

 Changed from Rev.1.1 to Rev.1.2 Daughter Card
 Added FS (SOIC) Package Option

Si2493/57/34/15/04

Global ISOmodem-EVB

Rev. 0.6 35

Si2493/57/34/15/04
Global ISOmodem-EVB

CONTACT INFORMATION

Silicon Laboratories Inc.
4635 Boston Lane
Austin, TX 78735
Tel: 1+[phone]
Fax: 1+[phone]
Toll Free: 1+[phone]

Email: [e-mail]
Internet: www.silabs.com

The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice.
Silicon Laboratories assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from
the use of information included herein. Additionally, Silicon Laboratories assumes no responsibility for the functioning of undescribed features
or parameters. Silicon Laboratories reserves the right to make changes without further notice. Silicon Laboratories makes no warranty, rep­resentation or guarantee regarding the suitability of its products for any particular purpose, nor does Silicon Laboratories assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation conse­quential or incidental damages. Silicon Laboratories products are not designed, intended, or authorized for use in applications intended to
support or sustain life, or for any other application in which the failure of the Silicon Laboratories product could create a situation where per­sonal injury or death may occur. Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized ap­plication, Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages.

Silicon Laboratories, Silicon Labs, and ISOmodem are trademarks of Silicon Laboratories Inc.

Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders.

36 Rev. 0.6