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●TDK
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●DESCRIPTION
●The 73K224BL is a highly integrated single-chip modem IC which provides the functions needed to construct a V.22bis compatible modem, capable of 2400 bit/s full-duplex operation over dial-up lines. The 73K224BL is an enhancement of the 73K224L single-chip modem which adds the hybrid hook switch control, and driver to the 73K224L. The 73K224BL 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 and 44-Lead TQFP package.
●FEATURES
●• Includes features of 73K224L single-chip modem
●• On chip 2-wire/4-wire hybrid driver and off hook relay buffer driver
●• One-chip multi-mode V.22bis/V.22/V.21 and Bell 212A/103 compatible modem data pump
●• FSK (300 bit/s), DPSK (600, 1200 bit/s), or QAM (2400 bit/s) encoding
●• Software compatible with other TDK Semiconductor K-Series one-chip modems
●• Interfaces directly with standard micro processors (80C51 typical)
●• Parallel or serial bus for control
●• Selectable internal buffer/debuffer and scrambler/descrambler functions
●• All asynchronous and synchronous operating modes (internal, external, slave)
●• Adaptive equalization for optimum perform ance 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 and guard tone generators
●• Test modes available: ALB, DL, RDL, mark, space, alternating bit, S1 pattern generation and detection
●• 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
