Features

 This data sheet applies to

Si2457/34/15/04 Revision D

 Data modem formats

ITU-T, Bell

300 bps up to 56 kbps

V.21,V.22, V.29 Fast Connect

V.44, V.42, V.42bis, MNP2-5

Automatic rate negotiation

 Type I and II caller ID decode

 No external ROM or RAM required

 UART, SPI, or parallel interface

 Flexible clock options

Low-cost 32.768 kHz oscillator

4.915 MHz oscillator

27 MHz clock input

 Integrated DAA

Over 6000 V capacitive

isolation

Parallel phone detect

Globally-compliant line

interface

Overcurrent detection

 AT command set support

 SMS / MMS support

 Firmware upgradeable

 EEPROM interface

 Lead-free, RoHS-compliant

packages

 Commercial or industrial

temperature range

 DTMF detection/generation