XECOM XE1414C-ITR, XE1414C Datasheet
XE1414C
Worldwide 14.4 KBPS Modem Module for Embedded Applications
5/2002
Description
Xecom's XE1414C is a complete, 14.4 Kbps modem in a
single component. Xecom designed the XE1414C for
use throughout North America, Europe and Japan. It
includes user transferrable FCC Part 68 Registration for
direct connection to telephone lines in the United States
and is compliant with CTR21.
The XE1414C is a complete modem packaged in a
compact module. The XE1414C includes all required
modem circuits including the DAA. XE1414C users do
not need to add RAM, ROM, Crystals, low distortion
transformer, or switches to complete the modem design.
The user only needs to provide the TTL level, serial
interface and the telephone line connection.
The XE1414C is pin compatible with Xecom's XE3314C
modem. This family of modems permits a simple
upgrade path from 14,400 bps to 33,600 bps for
international embedded modem applications.
Features
Meets telecom requirements for Europe, North
•
America, and Japan: Includes User Transferrable FCC
Part 68 Registration and CTR21 compliance
Small Size: 2.75 inches by 1.38 inches by 0.42 inches;
•
Modem Protocols support data transfer from 300
•
BPS to 14.4 KBPS: V.32bis, V.32, V.22bis, V.22, V.21,
Bell 212A and 103;
• Modem Control and Configuration via AT Commands
Fax Protocols: V.17, V.29, V.27ter, and V.21 channel 2
•
Error Correction; V.42, MNP2-4 and MNP10
•
Data Compression; V.42bis and MNP5 provides a
•
maximum effective data rate of 57,600 bps.
Non-Volatile Memory included for storing telephone
•
numbers and modem configuration.
• Standard operating temperature range 0C to 70C.
Extended range of -40C to +85C is available.
• Supports Leased Line Applications.
Serial I/O
/DTR
/RTS
/CTS
/DSR
TXD
RXD
/DCD
Auxiliary I/O
RESET
AR
LCS
OH
AMP
L1
L2
Modem
Controller
Block Diagram
ROM
NVRAM
Analog
Front
End
DAA
Tip
Ring
XECOM (1) XE1414C
XE1414C Mechanical Specifications
INCHES METRIC(MM)
PIN MIN MAX MIN MAX
A 2.74 2.760 69.60 70.10
B 1.370 1.390 34.80 35.31
C 0.420 0.430 10.67 10.92
D 1.190 1.210 30.23 30.73
E 1.890 1.910 48.01 48.51
F 0.125 0.200 3.18 5.08
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 0.025 0.51 0.64
Pins = 0.025 inch square pin; All pins tin-plated
A
B
Denotes Pin 1
C
G
G
D
XE1414C PIN CONFIGURATION
NC
AR
RXD
NC
NC
NC
NC
NC
/DTR
LCS
/CTS
NC
TXD
/RTS
NC
/RI
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
F
K
H
40
39
38
37
36
35
34
33
32
31
30
29
28
27
E
VCC
/DSR
/DCD
NC
RESET
NC
NC
NC
NC
NC
OH
NC
L2
L1
J
H
TIP
RING
18
20
22
21
AMP
GND
XECOM (2) XE1414C
XE1414C PIN DESCRIPTIONS
PIN NAME DESCRIPTION
1 NC No Internal Connection
2 AR Auxiliary Data/Voice Relay, Active High Output, TTL/CMOS. The AR signal goes high when ever the mo-
dem is in the on-hook state. It can be connected to an external relay to switch control of the telephone line
between the modem and an auxiliary handset when.
3 RXD Received Data, Output, TTL. Serial data output to the host. A logic "High" on RXD represents a "mark"
and a logic "Low" represents a "space".
4-8 NC No Internal Connection
9 \DTR Data Terminal Ready, Input, active Low, TTL. The "AT&D" command sets the function of \DTR. The de-
fault, AT&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 LCS Loop Current Sense, input, active High, TTL/CMOS. LCS provides an input to the modem from an ex-
ternal loop current sensor. The Loop Current Sensor may be required for some applications in which the
modem shares a telephone line with a telephone handset.
11 \CTS Clear to Send, Output, active Low, TTL/CMOS. \CTS provides the flow control output from the modem
when hardware flow control is selected. The modem revokes \CTS when the modem's input buffer is
full. The modem reasserts \CTS when the buffer can accept more data without a buffer overflow.
12 NC No Internal Connection
13 TXD 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 Request to Send, input, active Low, TTL. The XE1414C uses \RTS for hardware flow control. When
\RTS is revoked; hardware flow control is activated, and the modem will not place data on RXD.
15 NC No Internal Connection
16 \RI Ring Indicator, Output, active Low, TTL. When low indicates the modem is receiving a ring signal.
18 TIP Tip connection to the phone line (RJ11 pin 3) from the internal DAA. The XE1414C is not sensitive to
the battery voltage polarity across Tip and Ring.
20 RING Ring connection to the phone line (RJ11 pin 4) from the internal DAA.
21 GND Ground (0 volts)
22 AMP 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.
27-28 L1, L2 L1 and L2 provide the control the performance of the loop current holding circuit. When a jumper is applied
between L1 and L2, the CTR21 current limiting circuit is active and DC loop current is limited to 60
milliamps. When no jumper is provided, a full 100 milliamps of loop current is supported.
29 N/C No Internal Connection
30 OH Off-Hook, Output, active High. OH indicates the modem's hookswitch relay is closed. Hookswitch closure
connects the modem to the telephone line.
31-35 N/C No Internal Connection
36 RESET Hardware reset pin, Input, active High, TTL. A high on Pin 36 initiates a hardware reset. An external reset
is not required or recommended. The Reset pulse must be held a minimum of 100 milliseconds.
37 N/C No Internal Connection
XECOM (3) XE1414C
XE1414C PIN DESCRIPTIONS
PIN NAME DESCRIPTION
38 \DCD Data Carrier Detect, Output Active Low, TTL/CMOS. The &C command sets the function of \DCD. In the
default state \DCD activates when a valid carrier is detected.
39 \DSR Data Set Ready, Output, active Low , TTL/CMOS. &S sets the \DSR function. In the default condition, AT&S0,
\DSR is forced true.
40 Vcc +5 Volts
XE1414C ABSOLUTE MAXIMUM RATINGS
SUPPLY VOLTAGE - Vcc +6.5 Volts
DC INPUT VOLTAGE -0.6 Volts to +6.5 Volts
STORAGE TEMPERATURE RANGE -25° C TO +85° C
LEAD TEMPERATURE (Soldering, 2 sec per wave) 260° C
OPERATING TEMPERATURE RANGE
*Exceeding these values may result in permanent damage to the device.
1
Extended Operating Temperature (-40° to +85° C) available. Order XE1414C-ITR
1
0 TO 70° C
XE1414C ELECTRICAL SPECIFICATIONS
Parameter M in Typ Max Units Comments
VCC 4.75 5.25 Volts
ICC 140 160 180 ma On Line
4 0 ma Sleep Mode
Ring Voltage Detected 38 150 RMS Type B Ringer
Ring Frequency Detected 15.3 68 Hz T ype B Ringer
Telephone Loop Current 20 100 ma Off-Hook
Data Transmit level -11.0 -10.0 -9.0 dBm
DTMF Transmit Level -2.5 0 dBm Avg over 3 second interval
XECOM (4) XE1414C
XE1414C Typical Connection Diagram
L1
L2
XE1414C
/RXD
/TXD
/DTR
/RTS
/CTS
/DSR
/DCD
/RI
16C550
UART
J1
C1
C2
FB1
FB2
Ring
Tip
AMP
GND
.2 ufd
50K
LM386
.05 ufd
10 ohms
250 ufd
8 ohm,
.5 W
speaker
Recommended Parts
Reference Designation Description Recommended Part Number
FB1, FB2 Ferrite Beads TDK ACB2012L-120-X
C1, C2 Capacitors Panasonic ECKDRS471, 470 pfd, 2600 Volts
J 1 RJ11 Jack Stewart SS6446NF
Notes: 1) RJ11 Pin assignments reflect a 6-pin connector. Tip and Ring are always the center pins of the RJ11
Jack.
2) CTR21 requires the modem to be able to dissapate over two Watts in come applications where the integral
current limiting circuit is activated. The XE1414C requires a heat sink to be added to dissapte this additional power.
XECOM (5) XE1414C
Country Selection
Xecom has designed the XE1414C to the Telephone standards of a wide variety of countries
throughoput the world. Below is a list of the country standards which Xecom has found the XE1414C
to comply . Please contact Xecom if you have questions regarding a country not on this list.
Countries Supported:
COUNTRY AT COMMAND
Austria A T+GCI=0A
Belgium A T+GCI=0F
Denm ark A T+GCI=31
Finland A T+GCI=3C
France AT+GCI=3D
Germ any A T+GCI=42
Greece AT+GCI=46
Holland A T+GCI=7B
Ireland A T+GCI=57
Italy A T+GCI=59
Japan AT+GCI=00
Korea AT+GCI=B5
Norway AT+GCI=82
Portugal AT+GCI=8B
Singapore A T+GCI=B5
Spain A T+GCI=A0
Sweden AT+GCI=A5
Switzerland AT+GCI=A6
T aiwan AT+GCI=B5
United Kingdom A T+GCI=B4
United States AT+GCI=B5
NOTE: Country regulations permit Xecom to offer transferrable registration only in the United
States, FCC Part 68 only . All other required certifications of systems using the XE1414C are the
responsibility of Xecom’s customer. Xecom will assist our customers with any of these
certifications.
XECOM (6) XE1414C
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