SI2401-FSR Datasheet, PDF (1/72 Pages) Silicon Laboratories – V.22BIS ISOMODEM WITH LOW-COST DAA

Si2401/Si3008
V. 2 2 B I S I S O M O D E M ^® W I T H L O W - C O S T D A A
Features
Data modem formats
2400 bps: V.22bis
1200 bps: V.22, V.23, Bell 212A
300 bps: V.21, Bell 103
Fast connect and V.23 reversing
SIA and other security protocols
27 MHz CLKIN support
Caller ID detection and decode
UART with flow control
Integrated DAA
Over 6000 V capacitive isolation
Parallel phone detection
Compliant with FCC, China, JATE, and
31 other PTTs
Line-in-use detection
AT command set support
Call progress support
3.3 V Power
Lead-free and RoHS-compliant
packages
Applications
Set-top boxes
Point-of-sale
ATM terminals
Security systems
Medical monitoring
Power meters
Description
The Si2401 ISOmodem^® is a complete, two-chip, 2400 bps modem
integrating Silicon Laboratories’ fourth-generation direct access
arrangement (DAA), which provides a globally-programmable telephone
line interface with an unprecedented level of integration. Available in two
small packages, this compact solution eliminates the need for a separate
DSP data pump, modem controller, codec, isolation transformer, relay,
opto-isolators, and 2–4 wire hybrid. The Si2401 provides conventional
data formats at connect rates of up to 2400 bps with full-duplex operation
over the Public Switched Telephone Network (PSTN). This device is ideal
for embedded modem applications due to its small size, minimal external
component count, and low power consumption.
Functional Block Diagram
Si2401
RXD
TXD
CTS
RESET
CD/GPIO2
INT/GPIO4
RI/GPIO5
XTALI
XOUT
µ Controller
(AT Decoder,
Call Progress)
Control
Interface
DSP
(Data Pump)
Clock
Interface
To
phone
line
Ordering Information
See page 66.
Pin Assignments
Si2401
CLKIN/XTALI 1
XTALO 2
GPIO5/RI ³
V_D 4
RXD 5
TXD 6
CTS 7
RESET ⁸
16 GPIO1/EOFR
15 GPIO2/CD
14 GPIO3/ESC
13 V_A
12 GND
11 GPIO4/INT/AOUT
10 C1A
9 C2A
C1B
C2B
VREG
CID
Si3008
1 ₉₈
2
7
IGND
3
6
4
5
RX
DCT
QB
QE
U.S. Patent #5,870,046
U.S. Patent #6,061,009
Other patents pending
Rev. 1.1 2/06
Copyright^© 2006 by Silicon Laboratories
Si2401-Si3008