Description

The Si2433-KT is a two-chip modem, known as Si2401 ISOmodem®, which is integrated with Silicon Laboratories' fourth-generation direct access arrangement (DAA). This modem provides a globally-programmable telephone line interface with a high level of integration. With its compact design and small size, the Si2433-KT eliminates the need for separate components such as a DSP data pump, modem controller, codec, isolation transformer, relay, opto-isolators, and 2–4 wire hybrid. It can achieve data rates of up to 2400 bps over the Public Switched Telephone Network (PSTN), making it an ideal choice for embedded modem applications.

Specifications and features

- Supports data modem formats:
2400 bps: V.22bis
1200 bps: V.22, V.23, Bell 212A
300 bps: V.21, Bell 103
- Provides fast connect and V.23 reversing
- Supports SIA and other security protocols
- Offers 27 MHz CLKIN support
- Detects and decodes Caller ID
- Equipped with UART and flow control
- Integrated with DAA providing over 6000 V capacitive isolation
- Detects parallel phone activity
- Compliant with FCC, China, JATE, and 31 other PTTs
- Features line-in-use detection
- Supports AT command set
- Provides call progress support
- Operates at 3.3 V power
- Comes in lead-free and RoHS-compliant packages

Application Scenarios

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

Comparison

- Compact size and low power consumption
- Eliminates the need for multiple separate components
- Supports a wide range of data modem formats
- Provides caller ID detection and decoding
- Limited data rate of up to 2400 bps
- Does not support high-speed data transmission