TB3R2DR Datasheet, PDF (1/13 Pages) Texas Instruments – QUAD DIFFERENTIAL PECL RECEIVERS

TB3R1, TB3R2
SLLS587C – NOVEMBER 2003 – REVISED JANUARY 2008
QUAD DIFFERENTIAL PECL RECEIVERS
Check for Samples: TB3R1, TB3R2
FEATURES
1
• 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 V_CC 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
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 V_CC to ensure a logical high level input
if the inputs are open circuited.
PIN ASSIGNMENTS
D PACKAGE
(TOP VIEW)
AI
1
AI
2
AO
3
E1
4
BO
5
BI
6
BI
7
GND
8
16
VCC
15
DI
14
DI
13
DO
12
E2
11
CO
10
CI
9
CI
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
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.
AI
AO
AI
BI
BI
BO
C1
CO
C1
D1
D1
DO
E1
E2
Enable Truth Table
E1
E2
CONDITION
0
0
Active
1
0
Active
0
1
Disabled
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.