XECOM XE9601 Datasheet

Xecom, Inc. XE9601

9600 BPS Data Modem Module

XE9601

08-97

Description

Xecom's XE9601 provides high-speed data
transfer in a compact component. The XE9601
is a complete modem not just a modem chip. It
includes the telephone interface and all required
RAM and ROM. The XE9601's internal
telephone interface permits Xecom to offer user
transferable FCC Part 68 registration on the
XE9601. The XE9601 connects to the host
through a TTL level serial interface and to the
telephone network through a user-supplied RJ11
jack.

Xecom's XE9601, XE1401, XE3301 and
XE2401 share a common pin configuration.
This permits Xecom customers to select the
appropriate data rate from 2400 to 33,600 bps.

Features

• Small Size; 2.75 " x 1.38" x 0.55"

• Modem Protocols: CCITT V.32, V.22bis,
V.22, V.21; Bell 212A and 103

• Pin compatible with Xecom's XE2401

• User Transferrable FCC Part 68
Registration

• Modem control with "AT" commands

• Modem link speed to 9600 bps

• Low power, single +5V supply
Operating Power 1.0 W (Typ.)
Idle Power 125 mW (Typ.)
Sleep mode: 50 mW (Typ.)

xecom

PIN CONFIGURATION

RESET

N/C

RXD

/DTR

/AA

/CTS

OH

TXD

/RTS

NC

/RI

TIP

RING

AUX

I/O

ANALOG

FRONT END

DAA

TIP

RING

V

cc

GND

CONTROLLER

MEMORY

/RTS

/DTR

/CTS
/DSR

TXD

RXD

/DCD

/RI

RESET

OH

AR

AMP

/HS

/AA

RS232

I/O

VCC

/DSR

/DCD

AMP
GND

Block Diagram

1
2
3

9

10

11

12
13
14
15
16

18
20

40
39
38

22
21

Xecom, Inc. (2) XE9601

Mechanical Specifications - XE9601

A

B

Denotes Pin 1

C

D

G

J

H

E

F

K

L

A 2.74 2.760 69.60 70.10
B 1.370 1.390 34.80 35.31
C 0.490 0.510 12.45 12.95
D 0.890 0.910 22.61 23.11
E 1.890 1.910 48.01 48.51
F 0.175 0.250 4.41 6.35
G 0.080 0.100 2.03 2.54
H 0.415 0.435 10.54 11.05
J 0.090 0.110 2.29 2.79
K 0.020 0.040 0.51 1.02
L 0.380 0.400 9.65 10.16

Pins = 0.025 inch square pin

All pins tin-plated

INCHES METRIC(MM)

PIN MIN MAX MIN MAX

1 RESET I Hardware reset pin, Input, active High, TTL. A high on Pin 1 initiates a hardware reset.

An external reset is not required or recommended. The Reset pulse must be a minimum

of 200 milliseconds long.
2 N/C No Connection
3 RXD O Received Data, Output, TTL. Serial data output to the host. A logic "high" represents a

"mark" and a logic "low" represents a "space".
9 \DTR I Data Terminal Ready, Input, active Low, TTL. "&D" sets the function of DTR. The

default, &D2, requires the host to assert DTR to permit a modem link. The modem

drops the call in progress if DTR is revoked and will not connect until DTR is reasserted.

10 \AA O Auto-Answer, Output, active Low, TTL. A low on \AA indicates the modem is configured

to automatically answer an incoming call.

11 \CTS O Clear to Send, Output, active LO, TTL/CMOS. This pin indicates the modem is able to

transfer data.

12 OH O Off-Hook, Output, active High. OH indicates the modem's hookswitch relay is closed.

Hookswitch closure connects the modem to the telephone line.

13 TXD I Transmit Data, Input, TTL. Serial data input from the host. A logic "high" represents a

"mark" and a low represents a"space", TTL.

14 \RTS I Request to Send, input, active LO, TTL. The XE9601 does not use RTS.

15 NC --- No Internal Connection

16 \RI O Ring Indicator, Output, active LO, TTL. When low indicates the modem is receiving a ring

signal.

18 TIP — Tip connection to the phone line(RJ11 pin3) from the internal DAA. The XE9601 is not

sensitive to the battery voltage polarity across Tip and Ring.

20 RING — Ring connection to the phone line(RJ11 pin4) from the internal DAA.

PIN NAME I/O DESCRIPTION

Pin Descriptions

Xecom, Inc. (3) XE9601

21 GND — Ground (0 volts)
22 AMP O Audio output function is set by L & M commands and the value in register S22. This

output can drive a minimum load of 300 ohms.

38 \DCD O Data Carrier Detect, output, active LO, TTL/CMOS. &C sets the DCD function. In the

default condition, AT&C1, DCD indicates the presense of a carrier signal on the

telephone line.

39 \DSR O Data Set Ready, output, active LO, TTL/CMOS. &S sets the DSR function. In the default

condition, AT&S0, DSR is forced true.

40 Vcc — +5 Volts

PIN NAME I/O DESCRIPTION

Pin Descriptions (continued)

Tip
Ring

L1

L2

C1

C2

J1

VCC

Reset

TXD

RXD

+5 Volts

50K

.2 ufd

250 ufd

.05 ufd

10 ohms

8 ohm .5 W
Speaker

AMP

4 3

Line

GND

LM386

/RI

/RTS

/CTS

/DTR

/DSR
/DCD

OH

XE9601

16C450

UART

/DSR

/DCD

SIN

/DTR

/CTS

SOUT
/RTS

/RI

Modem Applications Schematic

Note: RJ11 Pin assignments reference a 6-pin connector. Tip and Ring are the center pins of all RJ11

jacks.

Recommended Parts

Reference Designation Description Recommended Part Number

L1, L2 Ferrite Beads TDK CB30-1812

C1, C2 Capacitors Sprague 30GAT47, 470 pfd, 3000 Volts

J1 RJ11 Jack Stewart SS6446NF