DESCRIPTION

The 73K324BL is a highly integrated single-chip modem IC which provides the functions needed to construct a V.22bis compatible modem, capable of 2400 bps full-duplex operation over dial-up lines. The 73K324BL is an enhancement of the 73K324L single-chip modem, which adds the hybrid hook switch control, and driver to the 73K324L. The 73K324BL integrates analog, digital, and switched-capacitor array functions on a single chip, offering excellent performance and a high level of functional integration in a 32-Lead PLCC package.

FEATURES

• Includes features of 73K324L single-chip

modem

• On chip 2-wire/4-wire hybrid driver and off

hook relay buffer

• One-chip multi-mode V.22bis/V.22/V.21/V.23

and Bell 212A compatible modem data pump

• FSK (300/1200 bps), DPSK (600, 1200 bps), or

QAM (2400 bps) encoding

• Software compatible with other Semiconductor K-Series one-chip modems

• Interfaces directly with standard microprocessors (80C51 typical)

• Parallel or serial bus for control

• Selectable asynch/synch with internal

buffer/debuffer and scrambler/descrambler

functions

• All asynchronous and synchronous operating

modes (internal, external, slave)

• Adaptive equalization for optimum

performance over all lines

• Programmable transmit attenuation (16 dB, 1

dB steps), selectable receive boost

(+18 dB)

• Call progress, carrier, answer tone,

unscrambled mark, S1, and signal quality

monitors

• DTMF, answer, SCT, and guard tone

generators

• Test modes available: ALB, DL, RDL, mark,

space, alternating bit, S1 pattern

• CMOS technology for low power consumption

(typically 100 mW @ 5 V) with power-down

mode (15 mW @ 5 V)

• TTL and CMOS compatible inputs and outputs