AI

AO

BO

CO

DO

AI

AI

BI

BI

C1

C1

D1

D1

D1

E2

E1

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

AI

AI

AO

E1

BO

BI

BI

GND

VCC

DI

DI

DO

E2

CO

CI

CI

D PACKAGE

(TOP VIEW)

TB3R1, TB3R2

SLLS587C – NOVEMBER 2003 – REVISED JANUARY 2008

QUAD DIFFERENTIAL PECL RECEIVERS

Check for Samples: TB3R1, TB3R2

The

power-down

loading

characteristics

of

the

1

FEATURES

receiver input circuit are approximately 8 k

Ω relative

•

Low-Voltage Functional Replacements for the

to the power supplies; hence they do not load the

Agere BRF1A, BRF2A, BRS2A, and BRS2B

transmission line when the circuit is powered down.

•

Pin-Equivalent to General Trade 26LS32

The package for these differential line receivers is the

Devices

16-pin SOIC (D) package.

•

High-Input Impedance Approximately 8 k

Ω

The enable inputs of this device include internal

•

3.5-ns Maximum Propagation Delay

pullup resistors of approximately 40 k

Ω that are

•

TB3R1 Provides 50-mV Hysteresis

if the inputs are open circuited.

•

TB3R2 With -125-mV Threshold Offset for

Preferred State Output

PIN ASSIGNMENTS

•

-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

•

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

FUNCTIONAL BLOCK DIAGRAM

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

Enable Truth Table

BRS2B and incorporates a -125-mV receiver input

E1

E2

CONDITION

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

0

0

Active

CDM ESD protection. The TB3R2 preferred state

feature places the output in the high state when the

1

0

Active

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

0

1

Disabled

power supply.

1

1

Active

1

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard

warranty. Production processing does not necessarily include testing of all parameters.