[TERIDIAN Semiconductor Corporation]

DESCRIPTION
The 73K324L is a highly integrated single-chip modem IC, which provides the functions, needed to
design a Quad-mode CCITT and Bell 212A compatible modem capable of operation over dial-up
lines. The 73K324L adds V.23 capability to the CCITT modes of TERIDIAN Semiconductor Corporation's 73K224 one-chip modem, allowing a one-chip implementation in designs intended for European markets, which require this added Modulation mode. The 73K324L offers excellent
performance and a high level of functional integration in a single IC. The device supports V.22bis, V.22, Bell 212A, V.21, and V.23 operating modes, allowing both synchronous and asynchronous operation as defined by the appropriate standard.

FEATURES
•  One chip Multi-mode CCITT V.22bis, V.22, V.21,V.23 and Bell 212A compatible modem data pump
•  FSK (75, 300, 1200 bit/s), DPSK (600, 1200 bit/s), or QAM (2400 bit/s) encoding
•  Pin and software compatible with other TERIDIAN Semiconductor Corporation K-Series family one-chip modems
•  Interfaces directly with standard microprocessors (8048, 80C51 typical)
•  Serial and parallel microprocessor bus for control
•  Selectable asynch/synch with internal buffer/debuffer and scrambler/descrambler functions
•  All synchronous (internal, external, slave) and Asynchronous Operating modes
•  Adaptive equalization for optimum performance over all lines
•  Programmable transmit attenuation (16 dB, 1 dB steps), and selectable receive boost (+18 dB)
•  Call progress, carrier, answer tone, unscrambled mark, S1, and signal quality monitors
•  DTMF, answer, calling, SCT and guard tone generators
•  Test modes available: ALB, DL, RDL; Mark, Space
and Alternating bit pattern generators
•  CMOS technology for low power consumption
(100 MW @ 5 V) with power-down mode
(15 mW @ 5V)
•  4-wire full duplex operation in all modes