SN55LBC172

SN55LBC172 QUADRUPLE LOW-POWER DIFFERENTIAL LINE DRIVER D Meets Standard EIA-485 D Designed for High-Speed Multipoint Transmission on Long Bus Lines in Noisy Environments D Supports Data Rates up to and Exceeding Ten Million Transfers Per Second D Common-Mode Output Voltage Range of – 7 V to 12 V D Positive- and Negative-Current Limiting D Low Power Consumption . . . 1.5 mA Max (Output Disabled) description SGLS084C – MARCH 1995 – REVISED JANUARY 2003 J OR W PACKAGE (TOP VIEW) 1A 1 1Y 2 1Z 3 G4 2Z 5 2Y 6 2A 7 GND 8 16 VCC 15 4A 14 4Y 13 4Z 12 G 11 3Z 10 3Y 9 3A FK PACKAGE (TOP VIEW) 1Y 1A NC VCC 4A 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. 3 2 1 20 19 1Z 4 18 4Y G5 17 4Z NC 6 16 NC 2Z 7 15 G 2Y 8 14 3Z 9 10 11 12 13 2A GND NC 3A 3Y NC – No internal connection The SN55LBC172 provides positive- and negative-current limiting and thermal shutdown for protection...