SN65LBC179Q Datasheet | Texas Instruments

Features - Designed for high-speed multipoint data transmission over long cables - Operates with pulse widths as low as 30 ns - Low supply current: 5 m A max - Meets or exceeds the standard requirementsof ANSI RS-485 and ISO 8482:1987(E) - mon-mode voltage range of - 7 V to 12 V - Positive-and negative-output current limiting - Driver thermal shutdown protection - Pin patible with the SN75179B 2 Description The SN65LBC179, SN65LBC179Q, and SN75LBC179 differential driver and receiver pairs are monolithic integrated circuits designed for bidirectional data munication over long cables that take on the characteristics of transmission lines. The devices are balanced, or differential, voltage mode devices that meet or exceed the requirements of industry standards ANSIRS-485 and ISO 8482:1987(E). Both devices are designed using TI’s proprietary Lin Bi CMOS™ with the low power consumption of CMOS and the precision and robustness of bipolar transistors in the same circuit. The SN65LBC179, SN65LBC179Q, and SN75LBC179 bine 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 monmode voltage range making them suitable for point-topoint 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. The SN65LBC179, SN65LBC179Q, and SN75LBC179 are available in the 8-pin dual-in-line and small-outline packages. The SN75LBC179 is characterized for operation over the mercial temperature range of 0°C to 70°C. The SN65LBC179 is characterized over the industrial temperature range of - 40°C to 85°C. The SN65LBC179Q is characterized...