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Meets Standard EIA-485

Designed for High-Speed Multipoint

Transmission on Long Bus Lines in Noisy

Environments

Supports Data Rates up to and Exceeding

Ten Million Transfers Per Second

Common-Mode Output Voltage Range of

–7 V to 12 V

Positive- and Negative-Current Limiting

Low Power Consumption . . . 1.5 mA Max

(Output Disabled)

description

The SN55LBC172 is a monolithic quadruple

differential line driver with 3-state outputs. This

device is designed to meet the requirements of the

Electronics Industry Association (EIA) standard

RS-485. The SN55LBC172 is optimized for

balanced multipoint bus transmission at data

rates up to and exceeding 10 million bits per

second. The driver features wide positive and

negative common-mode output voltage ranges,

current limiting, and thermal-shutdown circuitry,

making it suitable for party-line applications in

noisy environments. The device is designed using

the LinBiCMOS? process, facilitating ultralow

power consumption and inherent robustness.

The SN55LBC172 provides positive- and negative-current limiting and thermal shutdown for protection from

line fault conditions on the transmission bus line. This device offers optimum performance when used with the

SN55LBC173M quadruple line receiver.