74ABT08 datasheet(4/10 Pages) PHILIPS

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Philips Semiconductors

Product specification

74ABT08

Quad 2-input AND gate

1995 Sep 18

AC CHARACTERISTICS

GND = 0V; tR = tF = 2.5ns; CL = 50pF, RL = 500Ω

LIMITS

SYMBOL

PARAMETER

WAVEFORM

Tamb = +25°C

VCC = +5.0V

Tamb = –40°C to +85°C

VCC = +5.0V ±0.5V

UNIT

MIN

TYP

MAX

MIN

MAX

tPLH

tPHL

Propagation delay

An or Bn to Yn

1.0

2.4

1.9

3.4

2.8

1.0

4.0

3.0

tOSHL

tOSLH1

Output to Output skew

An or Bn to Yn

0.4

0.5

NOTE:

1. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same

device. The specification applies to any outputs switching in the the same direction, either HIGH-to-LOW (tOSHL) or LOW-to-HIGH (tOSLH);

parameter guaranteed by design.

AC WAVEFORMS

VM = 1.5V, VIN = GND to 3.0V

An, Bn

tPHL

tPLH

SA00345

Waveform 1.

Propagation Delay for Non-Inverting Outputs

OUTPUT N

same part

INPUT

SA00381

OUTPUT

tPLH

MIN

tPHL

MIN

tPLH

MAX

tPHL

MAX

tOSLH

tOSHL

Waveform 2. Common edge skew

TEST CIRCUIT AND WAVEFORMS

PULSE

GENERATOR

VIN

D.U.T.

VOUT

VCC

Test Circuit for Outputs

AMP (V)

NEGATIVE

PULSE

10%

90%

AMP (V)

POSITIVE

PULSE

90%

10%

tTHL (tF)

tTLH (tR)tTHL (tF)

tTLH (tR)

VM = 1.5V

Input Pulse Definition

DEFINITIONS

RL = Load resistor; see AC CHARACTERISTICS for value.

CL = Load capacitance includes jig and probe capacitance;

see AC CHARACTERISTICS for value.

RT = Termination resistance should be equal to ZOUT of

pulse generators.

INPUT PULSE REQUIREMENTS

FAMILY

74ABT

SH00067

Amplitude

Rep. Rate

3.0V

1MHz

500ns

2.5ns

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