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