CPCLA CPC2400E Datasheet
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CPC2400E
DS-CPC2400-R2
The CPC2400E is a 2400 baud embedded modem module intended for applications that require a data communications link to the Public Switched Telephone Network
(PSTN). The CPC2400E is a complete module on a small
1.0” x 2.5” printed circuit board that can be socketed or
soldered into the host system mother board. The module
is FCC Part 68 approved and includes a user transferrable registration number. It also is a UL recognized
component. The CPC2400E can be used in a variety of
applications including set top box back channel communications, vending machines, remote utility metering,
remote data acquisition, plus a host of other applications.
The CPC2400E supports a standard serial V.24 TTL
interface to the DTE equipment.
• Vending/Gaming Machines
• Set Top Box Back Channel
• Direct Broadcast Satellite
• Utility Meters
• Point of Sale Terminals
• Remote Diagnostics
• Remote Telemetry
• Remote Monitoring
• Embedded Applications
• UL/C-UL: 174201
• FCC Reg. # LVRPHL-25931-MD-E
• Easy Integration
• Small Footprint 1.00” x 2.50”
• Full Duplex 2400bps
• Low Power Consumption
• V.24 DTE Interface
• Single +5V Supply Operation
• Supported Protocols: V.22bis, V.23, V.22
• UL Recognized Component
• FCC Part 15B Compliant
• FCC Part 68 Approved (User Transferrable)
Applications
Features
Description
Approvals
Embedded Modem Module
Ordering Information
Part # Description
CPC2400E 2400 Baud Embedded Modem Module
Pin Configuration
J1
V
CC
GND
-DTR
-DCD
-MUTE
A1
N/C
RXD
TXD
J2
N/C
TIP
N/C
RING
N/C
Block Diagram
V.22BIS
DATA PUMP
CONTROLLER
DAA
PARALLEL
V.24
SERIAL
LINE
INTERFACE
DTE
TIP
RING
AUDIO
OUT
+5V
GND
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CPC2400E
Rev. 2
Electrical Characteristics
Absolute Maximum Ratings are stress ratings. Stresses
in excess of these ratings can cause permanent damage
to the device. Functional operation of the device at these
or any other conditions beyond those indicated in the
operational sections of this data sheet is not implied.
Exposure of the device to the absolute maximum ratings
for an extended period may degrade the device and effect
its reliability.
Absolute Maximum Ratings (@ 25˚ C)
2
Parameter Conditions Min Typ Max UnitS
DC Electrical Characteristics @ 25˚C
Vcc Supply Voltage - 4.75 5.0 5.25 V
Vcc Supply Current - Idle (Sleep Mode) Vcc=5V - 5 10 mA
Vcc Supply Current - Active Vcc=5V - 70 100 mA
Line Matching Impedance Vcc=5V - 600 - Ω
Ringing Voltage Vcc=5V, f=20Hz - 22 30 V
RMS
Ringer Equivalence Number (REN) Vcc=5V - 0.6B - Telephone Line Loop Current Vcc=5V 20 - 120 mA
DTE DC Characteristics @ 25˚C
Input High Voltage VIH 2 - Vcc+0.3 V
Input Low Voltage VIL - 0 - 0.8 V
Input Leakage Current IL GND<Vo<Vcc -10 - 10 µA
Output High Voltage VOH IOH=-2.0mA; Vcc=5V 4.0 - - V
Output Low Voltage VOL IOI=+2.0mA; Vcc=5V 0 - 0.4 V
Input High Voltage VIH Vcc=5.5V 0.7 2.6 Vcc+0.3 V
Input Low Voltage VIL Vcc=5.5V GND-0.3 1.6 0.2Vcc V
Parameter Min Max Units
Dielectric withstanding - 1000 VRMS
Voltage
Tip/Ring Current 20 120 mA
Continuous
Operating Temperature 0 70
o
C
Storage Temperature 0 100
o
C
Relative Humidity 10 85 %
(Non-Condensing)
Soldering Temperature - 260
o
C
CPC2400E
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Rev. 2
3
Definitions
Pin I/O Name Function
J1-1 I VCC Connects to external host power source of +5V +/-5%
J1-2 I GND Power supply return
J1-3 I -DTR Data Terminal Ready. An active Low input on this pin indicates
that the host system is ready to communicate with the modem.
J1-4 O -DCD Data Carrier Detect. When active, indicates carrier signal has
been detected. For options see AT Command reference section
under &C command.
J1-5 O -MUTE Mutes external speaker. Uses AT “M” command.
J1-6 O A1 Analog output that can be used to monitor modem activity via an
external audio amplifier.
J1-7 - N/C No Connection
J1-8 I RXD Serial data input from host DTE
J1-9 O TXD Serial data output to host DTE
Pin I/O Name Function
J2-1 - N/C No Connection
J2-2 I/O TIP Tip connection to telephone line
J2-3 - N/C No Connection
J2-4 I/O RING Ring connection to telephone line
J2-5 - N/C No Connection
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4
CPC2400E
Rev. 2
Functional Description
The CPC2400E is a small, full featured, 2400 baud
module intended for embedded applications and is fully
FCC Part 68 approved. The CPC2400E includes a user
transferable FCC registration number which the end
product must display (see section for more details). The
module consists of a Data Access Arrangement (DAA),
V.22bis data pump, and a microcontroller on a 1.00” x
2.50” PCB.
The CPC2400E connects to the telephone lines TIPand
RING leads and must be made through an approved
RJ-11 jack. The CPC2400E supports the industry standard AT command set (see AT Command set section for
further details).
The CPC2400E operates off a single +5V supply and
supports low power modes of operation. When the
device is not in use, it automatically enters sleep mode,
reducing supply current to a minimum. An incoming ring
signal from the phone lines powers up the device (wakeon ring).
An evaluation board is available for testing the
CPC2400E. This evaluation board includes an RS232
line driver, LED status indicators and an amplified speaker circuit. When used with the evaluation board, the
CPC2400E also meets the FCC Part 15B emissions test.
Contact Clare for more information on the CPC2400E
Evaluation Board.
DAA
The DAA portion of the CPC2400E has been designed
to interface directly with the U.S. PSTN as governed by
the FCC. The DAAincludes the circuitry for hookswitch,
ring detection, gyrator, surge protection and analog signal coupling transformer. The DAA circuitry provides up
to 1000 V
RMS
of longitudinal surge protection. For countries using a PSTN similar to the U.S. (Canada, Japan),
the product using the CPC2400E must be submitted to
a suitable test house for approval. Consult Clare for further information.
FCC Part 68: Connecting to the PSTN
1. General
Clare’s CPC2400E complies with FCC Part 68 rules
which regulates equipment connected to the telephone
network. The CPC2400E provides a user transferable
Part 68 registration which means that customers can
use Clare’s registration number for the CPC2400E.
Customers who wish, can reregister the modem under
their name. Reregistration assigns the customer a
unique registration number. No additional FCC Part 68
submittal is required for equipment using Clare’s
CPC2400E module.
2. Repairs
The FCC requires that Clare makes all necessary
repairs to the modem. If you are experiencing problems
with the CPC2400E, contact Clare at 1-800-272-5273
for further information. If repairs are necessary after the
modem has been installed in your product and delivered
to your customer, the modem must be returned to you
where the CPC2400E can be removed and sent back to
Clare.
3. Label Instructions
Alabel similar to the following should be made visible on
the outside of the end user product.
Complies with Part 68 of FCC Rules
Registration Number: LVRPHL-25931-MD-E
Ringer Equivalence: 0.6B
Required Connection: RJ-11
4. Design Guidelines
The following design guidelines should be followed to
insure compatibility to FCC Part 68 tests:
4.1. The CPC2400E, the RJ-11 jack and the interface
circuitry must be mounted on a PCB the should meet
UL 94V-0 flammability standard.
4.2. Tip and Ring traces from the CPC2400E to the RJ11 jack should be isolated by a minimum of 1.5mm
(0.06in) to prevent breakdown. Traces must have a minimum width of 0.5mm (.02in).
4.3 Insure that module is securely installed to the host
system. Vibration and drop tests will loosen components that are not securely mounted. One of two methods for securing the module should be used:
4.3.1 Soldered to the main PCB. This method is well
suited for harsh environments where the end product
may be subjected to shock and vibrationas in industrial environments (equipment monitoring, etc.).
4.3.2 Socketed to the main PCB. This method is well
suited for environments where the end product is not
subjected to shock and vibrations as in consumer
applications (set top boxes, etc.).
4.4. Components used must be able to withstand temperature and humidity extremes per FCC Part 68.
CPC2400E
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Rev. 2
4.5. When connecting to the PSTN, an FCC approved
telephone jack must be used in the host system and
must meet the mechanical requirements per FCC Part
68.3 Sub-part F. For RJ-11 jacks, refer to FCC Public
Notice #42269 for a list of approved vendors.
4.6. The supplied FCC Registration Number including
REN must be visible on the outside of the end user
product. See Section 3.
5. Exhibit J: User Instructions
Instructions to our customers:
The FCC Part 68 Rules require the following information
(or equivalent) to be provided for the end user product.
FCC Requirements for Consumer Products
This equipment complies with FCC rules, Part 68. On
the,
[ ] FRONT side [ ] BOTTOM side
[ ] BACK side [ ] TOP side
of this equipment is a label that contains, among other
information, the FCC Registration Number and Ringer
Equivalence Number (REN) for this equipment. If
requested, provide this information to your telephone
company.
The (REN) is useful to determine the quantity of devices
you may connect to your telephone line and still have all
of those devices Ring when your number is called. In
most, but not all areas, the sum of the REN’s of all
devices should not exceed five (5.0). To be certain of
the number of devices you may connect to your line, as
determined by the REN, you should call your local telephone company to determine the maximum REN for
your calling area.
If this equipment causes harm to the telephone network,
the Telephone Company may discontinue your service
temporarily. If possible, they will notify you in advance.
But if advance notice isn’t practical, you will be notified
as soon as possible. You will be advised of your right to
file a complaint with the FCC.
Y our telephone company may make changes in its facilities, equipment, operations, or procedures that could
affect the proper operation of your equipment. If they
do, you will be given advance notice so as to give you
an opportunity to maintain uninterrupted service.
If you experience trouble with this equipment, please
contact (your company name) at (your company phone
number) for warranty/repair information. The telephone
company may ask that you disconnect this equipment
from the network until the problem has been corrected
or until you are sure that the equipment is not malfunctioning.
This equipment may not be used on coin service provided by the telephone company. Connection to party
lines is subject to state tariffs.
FCC rules prohibit the use of non-hearing aid compatible telephones in the following locations or applications:
(1) All public or semipublic coin-operated or credit card
telephones.
(2) Elevators, highways, tunnels (automobile, subway,
railroad or pedestrian) where a person with impaired
hearing might be isolated in an emergency.
(3) Places where telephones are specifically installed to
alert emergency authorities such as fire, police, or medical assistance personnel.
(4) Hospital rooms, residential health care facilities, convalescent homes, and prisons.
(5) Workstations for the hearing impaired.
(6) Hotel, moel, apartment lobbies; in stores where tele-
phones are used by patrons to order merchandise; in
public transportation terminals where telephones are
used to call taxis, or to reserve lodging or rental cars.
(7) Hotel and motel rooms. At least ten percent of the
rooms must contain hearing aid compatible telephones;
or jacks or plug-in hearing-aid compatible telephones
which will be provided to hearing impaired customers
upon request.
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6
CPC2400E
Rev. 2
Applications
Figure 1 is a schematic of the CPC2400E in a typical
host system application. The host system communicates to the CPC2400E through a standard V.24 serial
interface. Refer to the Pinout and Definitions section for
functional descriptions of the pins. The transmit and
receive data is sent over the TXD and RXD pins. The DCD and -DTR pins are used for handshaking. The
audio output pin, A1 is used for monitoring the analog
data and can be amplified to drive a speaker. The MUTE can be used to enable or disable the speaker.
The ferrite beads FB1 and FB2 may be required to
reduce EMI emissions per FCC Part 15. Determining
the value for the ferrite beads depends solely on the
emissions generated by the end user product.
Figure 2 is a schematic of the CPC2400E in a standalone RS232C configuration. This circuit uses the Linear
Technologies LT1181A RS232 line driver. Note that the
LT1181A line driver inverts the signals. Both figures 1
and 2 are for reference purposes only . Exact component
values should be determined by the user.
CPC2410E
MODEM
TIP
RING
TELEPHONE
LINE
FB1
FB2
HOST
SYSTEM
SPEAKER AUDIO AMP
RXD
TXD
-DCD
-DTR
-MUTE
A1
+5V
VCC
GND
CPC2400E
MODEM
TIP
RING
TELEPHONE
LINE
FB1
FB2
RXD
TXD
LT1181A
1
13
2
3
4
5
6
7
8
9
10
11
12
17
14
15
16
18
20
19
21
22
24
23
25
TXD
RXD
8
11
910
15
14
13
12
16
2
4
5
6
+5V
17
3
18
7
DB25F
RS232 DRIVER
+5V
VCC
GND
Figure 1. CPC2400E System Environment
Figure 2. Stand Alone Modem with RS232C Interface
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