si2401 Silicon Laboratories, si2401 Datasheet

si2401

Manufacturer Part Number

si2401

Description

V.22bis Isomodem With Integrated Global Daa

Manufacturer

Silicon Laboratories

Datasheet

1.SI2401.pdf (76 pages)

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V. 22

Features

Applications

Description

The Si2401 ISOmodem

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

Rev. 1.0 12/05

EOFR/GPIO1

ESC/GPIO3

INT/GPIO4

CD/GPIO2

Data modem formats

27 MHz CLKIN support

Caller ID detection and decoding

UART with flow control

Set-top boxes

Point-of-sale

RI/GPIO5

RESET

This information applies to a product under development. Its characteristics and specifications are subject to change without notice.

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

XTALI

XOUT

RXD

TXD

CTS

B I S

Interface

Control

Interface

Clock

I S O

Si2401

(Data Pump)

is a complete, two-chip 2400 bps modem integrating

Call Progress)

(AT Decoder,

µ Controller

M O D E M

DSP

ATM terminals

Security systems

Integrated third-generation DAA

AT command set support

Call progress support

3.3 V Power

Lead-free, RoHS-compliant

packages

Fewer external components required

Over 5000 V capacitive isolation

Parallel phone detect

Globally-compliant line interface

Isolation

Interface

W I T H

Si3010

Terminations

Medical monitoring

Power meters

Hybrid, AC

Ring Detect

and DC

Off-Hook

N T E G R A T E D

DCT

QE2

VREG

VREG2

DCT2

DCT3

RNG1

RNG2

U.S. Patent #5,870,046

U.S. Patent #6,061,009

Other patents pending

CLKIN/XTALI

GPIO5/RI

VREG

RNG1

XTALO

RESET

DCT

C2B

Ordering Information

C1B

RXD

CTS

TXD

Pin Assignments

L O B A L

See page 72.

Si3010

Si2401

GPIO4/INT/AOUT

D A A

GPIO1/EOFR

GPIO2/CD

GPIO3/ESC

GND

C1A

C2A

DCT2

IGND

DCT3

QE2

RNG2

VREG2

Si2401

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