Si2400
V.22BIS ISOMODEM WITH INTEGRATED GLOBAL DAA
Features
Data Modem Formats Integrated DAA
z 2400 bps: V.22bis z Capacitive Isolation
z 1200 bps: V.22, V.23, Bell 212A z Parallel Phone Detect
z 300 bps: V.21, Bell 103 z Globally Compliant Line Interface
z Fast Connect and V.23 Reversing z Overcurrent Detection
z SIA and other security protocols
AT Command Set Support
Caller ID Detection and Decode
Integrated Voice Codec
DTMF Tone Gen./Detection
PCM Data Pass-Through Mode
Ordering Information
3.3 V or 5.0 V Power
HDLC Framing in Hardware
See page 90.
UART with Flow Control
Call Progress Support
Pb-Free/RoHS-Compliant
Packages Available
Pin Assignments
Applications
Si2400
Set Top Boxes Security Systems Medical Monitoring
XTALI 1 EOFR/GPIO1
16
XTALO CD/AIN/GPIO2
2 15
Power Meters ATM Terminals Point-of-Sale
CLKOUT 3 ESC/GPIO3
14
V ISOB
4 13
D
Description
RXD* GND
5 12
TXD* C1A
6 11
The Si2400 ISOmodem is a complete modem chipset with integrated
CTS ALERT/GPIO4
7 10
direct access arrangement (DAA) that provides a programmable line
RESET AOUT
8 9
interface to meet global telephone line requirements. Available in two 16-
pin small outline (SOIC) packages, it eliminates the need for a separate
DSP data pump, modem controller, analog front end (AFE), isolation
Si3015
transformer, relays, opto-isolators, 2- to 4-wire hybrid, and voice codec.
QE2 FILT2
1 16
The Si2400 is ideal for embedded modem applications due to its small
DCT 2 FILT
15
board space, low power consumption, and global compliance.
IGND RX
3 14
C1B REXT
4 13
Functional Block Diagram
RNG1 REXT2
5 12
RNG2 REF
6 11
Si2400 Si3015 QB VREG2
7 10
QE VREG
8 9
RXD RX
TXD
Controller
(AT Decoder
FILT
Call Progress) Hybrid
FILT2
Patents pending
and
REF
RESET DC
DCT
Termination VREG
EOFR/GPIO1
VREG2
REXT
CD/AIN/GPIO2 DSP
REXT2
(Data Pump)
ESC/GPIO3 Control
Interface
ALERT/GPIO4
RNG1
CTS
RNG2
Ring Detect
QB
Audio Off-Hook
QE
Codec
CLKOUT
QE2
Clock
XTALI
Interface
XTALO
AOUT
Rev. 1.3 8/06 Copyright 2006 by Silicon Laboratories Si2400
Si2400
Si3015
MUX
UART
Isolation Interface
Isolation InterfaceSi2400
2 Rev. 1.3