Philips Semiconductors

Product specification

74ABT16543

74ABTH16543

16-bit latched transceivers with dual enable

(3-State)

1998 Feb 27

8

AC WAVEFORMS (Continued)

VM

nAx, nBx

VM

VM

VM

VM

VM

nLEAB, nLEBA,

nEAB, nEBA

ts(H)

th(H)

ts(L)

th(L)

tw(L)

NOTE: The shaded areas indicate when the input is permitted

to change for predictable output performance.

SH00042

Waveform 3. Data Setup and Hold Times and Latch Enable

Pulse Width

nOEAB, nOEBA,

nEAB, nEBA

VM

tPZH

tPHZ

0V

VOH –0.3V

VM

VM

nAx, nBx

VOH

SH00043

Waveform 4. 3-State Output Enable Time to High Level and

Output Disable Time from High Level

tPZL

tPLZ

VOL +0.3V

VM

VM

VM

nOEAB, nOEBA,

nEAB, nEBA

nAx, nBx

VOL

SH00044

Waveform 5. 3-State Output Enable Time to Low Level and

Output Disable Time from Low Level

TEST CIRCUIT AND WAVEFORMS

PULSE

GENERATOR

RT

VIN

D.U.T.

VOUT

RL

VCC

RL

7.0V

Test Circuit for 3-State Outputs

VM

VM

tW

AMP (V)

NEGATIVE

PULSE

10%

10%

90%

90%

0V

VM

VM

tW

AMP (V)

POSITIVE

PULSE

90%

90%

10%

10%

0V

tTHL (tF)

tTLH (tR)tTHL (tF)

tTLH (tR)

Input Pulse Definition

DEFINITIONS

see AC CHARACTERISTICS for value.

pulse generators.

INPUT PULSE REQUIREMENTS

FAMILY

Amplitude

Rep. Rate

74ABT/H16

3.0V

1MHz

500ns

2.5ns

2.5ns

SWITCH POSITION

TEST

SWITCH

closed

closed

All other

open

SA00018

CL