Devices Offer High Performance

SN75LBC17X Devices Offer High Performance With Low Power

Texas Instruments new data communications devices for the EIA RS-485 standard offer low power consumption without sacrificing speed, along with one of the most extensive packaging and temperature selections in the industry.

The SN75LBC17X family is made up of drivers, receivers, and transceiver devices which combine increased speed and power reduction compared to TI's previous generation of devices. Optimization of speed and power is made possible by our LinBiCMOS™ process, which combines the stability and precision of bipolar transistors with the low power consumption of CMOS.

22 ns propagation delay

This family of devices offers a full range of functions, operating temperature ranges and packages. High-speed 20 V bipolar transistors provide the precision and stability needed for meeting the requirements of RS-485 cost effectively. The use of CMOS transistors in other sections of the circuitry significantly reduces the quiescent current requirements over an all-bipolar circuit.

The differential SN75LBC17X devices offer several features which assure high reliability in even the noisiest applications. Wide common-mode output voltage range, current limiting and thermal shutdown circuitry prevent bus driver damage from line fault conditions on the data bus.

Typical applications for these devices include: point-of-sale terminal networks, programmable logic controller I/O, SCSI and IPI parallel buses and PBX switching. Extended operating temperature range options are available (SN65 prefix), characterized over -40°C to 85°C. The SN55 prefix devices are military qualified, and are available in ceramic DIP or chip carrier packaging, characterized from -55°C to 125°C. All devices are pin-compatible with previous generation parts and available in surface mount and dual-in-line packages.

Product features

Low supply current Receivers: 3 mA (typ) Drivers: 1 mA (typ)
High speed: As low as 40 ns pulses
Pin-for-pin compatible with industry standard devices for ease of design
Packaging: Surface mount options available
Extended temperature ranges available:
40°C to 85°C
5°C to 125°C

Vol 9, Summer, 1994