73M2921

Features:

•Automatic handshaking for all data modes
•Data Speeds:
 V.22bis - 2400 b/s
 V.22, Bell 212 - 1200 b/s
 V.21, Bell 103 - 300 b/s
 V.23 1200 b/s - 75 b/s
 Bell 202 1200 b/s
•Facsimile Speeds:
 V.29 - 9600, 7200 b/s
 V.27ter - 4800, 2400 b/s
 V.21 ch 2 - 300 b/s
•V.8bis applications
•Designed for 3.3 and 5-Volt systems.
•Low operating power.
•Speaker monitor output
•Provides 2 tone generators for single tone or DTMF generation
•Provides DTMF tone detection
•Provides 4 precise and 1 imprecise call progress filters and corresponding detect bits with programmable  thresholds and frequencies
•Provides CAS tone detection for ADSI and CLASS feature support
•Supports parallel (8 bit) control, and synchronous serial data I/O
•73M2921 provides a microcontroller inter-rupt
•Packaging: The 73M2921 is available in a QFP production package. A PGA package is available for prototyping


Pinout




Specifications

PARAMETER	RATING
VDD Supply Voltage	7V
Storage Temperature	-65 to 150°C
Applied Voltage	-0.3 to VDD+0.3V
Note: All inputs and outputs are protected from static charge using built-in, industry standard protection devices and all outputs are short-circuit protected.

Description

  The 73M2921 is a CMOS integrated circuit which provides all the modem "Data Pump" functions required to implement a V.22bis data modem.  It consists of a DSP (Digital Signal Processor) core with RAM and ROM data memory, ROM instruction memory, and register mapped input/output functions including timers, interrupts, ∆ ADC and DAC ports and Serial Data I/O.

  Once the 73M2921 has been initialized, all call progress and modem handshaking is automatic.The default conditions may be changed as required for country specific or custom applications.

  The 73M2921 provides DTMF tone generation and detection, precise call progress detect and ADSI functions such as CAS tone detection. Other features include a parallel interface control port between the host processor and the 73M2921.A synchronous serial data channel provides synchronizing clocks RXCLK and TXCLK from the
modem pump to the controller.

  The 73M2921 contains an oscillator and power control features. The host controller function can be implemented with a 73M2910 communications micro controller or
another commercial microcontroller (such as the 68302).  The 73M2921 has been optimized to work with the 73M2910 synchronous serial port.