Description

The BTK1A and BTM1A devices are dual differential transceiver circuits that transmit and receive digital data over balanced transmission lines and are compatible with Agere Systems Inc. quad differential drivers and receivers. The dual drivers translate input TTL logic levels to differential pseudo-ECL output levels. The dual receivers convert differential input logic levels to TTL output levels. Each driver/receiver pair has its own common enable control allowing serial data and a control clock to be transmitted and received on a single integrated circuit. The BTK1A transceiver requires the customer to supply termination resistors on the circuit board.

Features

Driver Features

■ Two line drivers per package

■ Logic to convert TTL input logic levels to differential, pseudo-emitter coupled logic (ECL) output logic levels

■ No line loading when VCC = 0 V

■ High output driver for 50 ? loads

■ 200 mA short-circuit current (typical)

■ 2.0 ns maximum propagation delay

■

Receiver Features

■ Two line receivers per package

■ High input impedance ? 8 k?

■ Logic that converts differential input logic levels to transistor-transistor logic (TTL) output logic levels

■ 4.0 ns maximum propagation delay

■ <0.20 V input sensitivity (typical)

■ ?1.2 V to +7.2 V common-mode range

Common Device Features

■ Common enable for each driver/receiver pair

■ Operating temperature range: –40 °C to +125 °C (wider than the 41 Series)

■ Single 5.0 V ± 10 supply

■ 400 Mbits/s maximum data rate

■ Meets enhanced small device interface (ESDI) standards

■ Electrostatic discharge (ESD) performance better than the 41 Series

■ Lower power requirement than the 41 Series