SI2401 Datasheet, PDF (1/74 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
z 2400 bps: V.22bis
z 1200 bps: V.22, V.23, Bell 212A
z 300 bps: V.21, Bell 103
z Fast connect and V.23 reversing
z SIA and other security protocols
„ 27 MHz CLKIN support
„ Caller ID detection and decode
„ UART with flow control
„ Integrated third-generation DAA
z Fewer external components required
z Over 5000 V capacitive isolation
z Parallel phone detect
z Globally-compliant line interface
„ AT command set support
„ Call progress support
„ 3.3 V Power
„ Low-profile 16-pin SOIC package
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
Ordering Information
See page 70.
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
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
U.S. Patent #5,870,046
U.S. Patent #6,061,009
Other patents pending
Preliminary Rev. 0.9 5/04
Copyright © 2004 by Silicon Laboratories
Si2401
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.