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SN65LBC179DG4 Datasheet(PDF) 1 Page - Texas Instruments |
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SN65LBC179DG4 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 19 page SN75LBC179, SN65LBC179, SN65LBC179Q LOW POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS SLLS173F − JANUARY 1994 − REVISED APRIL 2006 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Designed for High-Speed Multipoint Data Transmission Over Long Cables D Operates With Pulse Widths as Low as 30 ns D Low Supply Current ...5 mA Max D Meets or Exceeds the Standard Requirements of ANSI RS-485 and ISO 8482:1987(E) D Common-Mode Voltage Range of −7 V to 12 V D Positive- and Negative-Output Current Limiting D Driver Thermal Shutdown Protection D Pin Compatible With the SN75179B description The SN65LBC179, SN65LBC179Q, and SN75LBC179 differential driver and receiver pairs are monolithic integrated circuits designed for bidirectional data communication over long cables that take on the characteristics of transmission lines. They are balanced, or differential, voltage mode devices that meet or exceed the requirements of industry standards ANSI RS-485 and ISO 8482:1987(E). Both devices are designed using TI’s proprietary LinBiCMOS with the low power consumption of CMOS and the precision and robustness of bipolar transistors in the same circuit. The SN65LBC179, SN65LBC179Q, and SN75LBC179 combine a differential line driver and differential line receiver and operate from a single 5-V supply. The driver differential outputs and the receiver differential inputs are connected to separate terminals for full-duplex operation and are designed to present minimum loading to the bus when powered off (VCC = 0). These parts feature a wide common-mode voltage range making them suitable for point-to-point or multipoint data bus applications. The devices also provide positive- and negative-current limiting and thermal shutdown for protection from line fault conditions. The line driver shuts down at a junction temperature of approximately 172 °C. Copyright 1994 − 2006, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. LinBiCMOS is a trademark of Texas Instruments. logic symbol† logic diagram (positive logic) Y Z B A R D 5 6 7 8 2 3 R D B A Z Y 7 8 6 5 2 3 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. INPUT D OUTPUTS Y Z DRIVER DIFFERENTIAL INPUTS A− B VID ≥ 0.2 V − 0.2 V < VID < 0.2 V VID ≤ − 0.2 V Open circuit OUTPUT R H ? L H RECEIVER H = high level, L = low level, ? = indeterminate Function Tables 1 2 3 4 8 7 6 5 VCC R D GND A B Z Y D OR P PACKAGE (TOP VIEW) H L H L L H |
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