1FEATURES

• Low-Voltage Functional Replacements for the

Agere BRF1A, BRF2A, BRS2A, and BRS2B

• Pin-Equivalent to General Trade 26LS32

Devices

• High-Input Impedance Approximately 8 kΩ

• 3.5-ns Maximum Propagation Delay

• TB3R1 Provides 50-mV Hysteresis

• TB3R2 With -125-mV Threshold Offset for

Preferred State Output

• -0.5-V to 5.2-V Common Mode Range

• Single 3.3 V ±10% Supply

• Slew Rate Limited (0.5 ns min 80% to 20%)

• TB3R2 Output Defaults to Logic 1 When Inputs

Left Open or Shorted to VCC or GND

• ESD Protection HBM > 3 kV, CDM > 2 kV

• Operating Temperature Range: -40°C to 85°C

• Available SOIC (D) Package

APPLICATIONS

• Digital Data or Clock Transmission Over

Balanced Lines

DESCRIPTION

These quad differential receivers accept digital data

over balanced transmission lines. They translate

differential input logic levels to TTL output logic

levels.

The TB3R1 is a pin- and function-compatible

replacement for the Agere Systems BRF1A and

BRF2A; it includes 3-kV HBM and 2-kV CDM ESD

protection.

The TB3R2 is a pin- and function-compatible

replacement for the Agere Systems BRS2A and

BRS2B and incorporates a -125-mV receiver input

offset, preferred state output, 3-kV HBM and 2-kV

CDM ESD protection. The TB3R2 preferred state

feature places the output in the high state when the

inputs are open, shorted to ground, or shorted to the

power supply.

The power-down loading characteristics of the

receiver input circuit are approximately 8 kΩ relative to the power supplies; hence they do not load the

transmission line when the circuit is powered down.

The package for these differential line receivers is the

16-pin SOIC (D) package.

The enable inputs of this device include internal

pullup resistors of approximately 40 kΩ that are

connected to VCC to ensure a logical high level input

if the inputs are open circuited.