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 fullduplex 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-ofsale (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.

FEATUREs
● Data modem formats
   ◆ 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
● 27 MHz CLKIN support
● Caller ID detection and decoding
● UART with flow control
● Integrated third-generation DAA
   ◆ Fewer external components required
   ◆ Over 5000 V capacitive isolation
   ◆ Parallel phone detect
   ◆ Globally-compliant line interface
● AT command set support
● Call progress support
● 3.3 V Power
● Lead-free, RoHS-compliant packages

APPLICATIONs
● Set-top boxes
● Point-of-sale
● ATM terminals
● Security systems
● Medical monitoring
● Power meters