SI2401 Datasheet, PDF (1/76 Pages) List of Unclassifed Manufacturers – V.22BIS ISOMODEM WITH INTEGRATED GLOBAL DAA

Si2401
V. 2 2 B I S I S O M O D E M ^® W I T H I N T E G R A T E D G L O B A L D A A
Features
„ Data modem formats
„ Integrated third-generation DAA
z 2400 bps: V.22bis
z Fewer external components required
z 1200 bps: V.22, V.23, Bell 212A
z Over 5000 V capacitive isolation
z 300 bps: V.21, Bell 103
z Parallel phone detect
z Fast connect and V.23 reversing
z Globally-compliant line interface
z SIA and other security protocols
„ AT command set support
„ 27 MHz CLKIN support
„ Call progress support
„ Caller ID detection and decoding _{„ 3.3 V Power}
„ UART with flow control
„ Lead-free, RoHS-compliant
packages
Applications
„ Set-top boxes
„ Point-of-sale
„ ATM terminals
„ Medical monitoring
„ Security systems „ Power meters
Description
The Si2401 ISOmodem^® is a complete, two-chip 2400 bps modem integrating
Silicon Labs’ third-generation direct access arrangement (DAA), which provides a
globally-programmable telephone line interface with an unprecedented level of
integration. Available in two 16-pin SOIC 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).
Additionally, the Si2401 is fully-programmable to meet global standards with a
single design. Other features include fast connect times for electronic point-of-
sale (EPOS) applications and alarm protocols for security systems. The device is
ideal for embedded modem applications due to its small size, low external
component count, and low power consumption.
Functional Block Diagram
RXD
TXD
CTS
RESET
EOFR/GPIO1
CD/GPIO2
ESC/GPIO3
INT/GPIO4
RI/GPIO5
XTALI
XOUT
Si2401
µ Controller
(AT Decoder,
Call Progress)
Control
Interface
DSP
(Data Pump)
Clock
Interface
Si3010
Isolation
Interface
Hybrid, AC
and DC
Terminations
Ring Detect
Off-Hook
RX
IB
SC
DCT
VREG
VREG2
DCT2
DCT3
RNG1
RNG2
QB
QE
QE2
Ordering Information
See page 72.
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
Si3010
QE 1
DCT 2
RX ³
IB 4
C1B ⁵
C2B 6
VREG 7
RNG1 ⁸
16 DCT2
15 IGND
14 DCT3
13 QB
12 QE2
11 SC
10 VREG2
9 RNG2
U.S. Patent #5,870,046
U.S. Patent #6,061,009
Other patents pending
Rev. 1.0 12/05
Copyright © 2005 by Silicon Laboratories
Si2401
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.