CH224ATF

· FCC Part 68 pre-approved
· UL1950, 3rd edition listed
· 1500 Vrms isolation
· Complete solution: on-board DAA
· Data modes
   - CCITT v.22 bis (2400 bps), V.22 (1200 bps)
   - Bell 212A (1200 bps) and 103 (300 bps)
   - Enhanced AT commands
· Group 3 fax modes
   - V.29 (6900/7200 bps) transmit
   - V.27 ter (4800/2400 bps) transmit and receive
   - V.21 Channel 2 (300 bps) transmit and receive
· EIA-578 Service Class 1 commands
· V.42/MNP2-4 and V.42 bis/MNP5 support without additional hardware
· Data/fax discriminator and auto answering
· Communications software compatible
· Serial asynchronous DTE interface
· NVRAM interface allows storage of two user configurations and four 36-digit dial strings
· Automatic adaptive/ fixed compromise equalization
· Programmable sleep mode
· Full-duplex data mode test capabilities: Analog loop, local digital loop, and remote digital loop
· Half-duplex fax mode test capabilities
· Automatic format/speed sensing
· Low power consumption (typical):
   Interface Operating Sleep
   Serial TTL: 155mW 35mW
· Single +5VDC power supply

The CH224ATF is a complete FCC Part 68 preapproved, 2400 bps full function modem solution; incorporating an on-board Data Access Arrangement (DAA) in a small footprint, socket-able packaging format (2.5" L x 1.0 W x 0.45" H).

CH224ATF is specifically designed for use as direct re-placement for Conexant/Rockwell's SocketModemä (serial TTL I/O option, Part No. SF224ATF-H1-D5-A0-P1).

This modem provides a fast and convenient way to integrate a PSTN connectivity into any OEM product while utilizing a small portion of PCB area. The CH224ATF requires two external interfaces: a CCITT V.24 serial interface that is routed directly from the UART or UART interface, and a TIP and RING interface, which is connected directly to a conventional RJ-11 jack for the PSTN line connection. The CH224ATF also has various indicator and status lines to monitor operations or to establish triggers. The CH224ATF modem is controlled by industry standard "AT" commands and is compatible with available industry communication software.

CH224ATF supports asynchronous operation at 2400 bps, 1200 bps, and 300 bps to both Bell and CCIT standards. The resident PSTN line interface is FCC Part 68 approved, and is also Canadian DOC approveable, and can be approved in other countries that require 1500VAC RMS isolation.