Philips Semiconductors

Product specification

74ABT16500C

74ABTH16500C

18-bit universal bus transceiver (3-State)

1998 Feb 27

9

AC WAVEFORMS (Continued)

VM

VM

VM

VM

VM

LEAB or

LEBA

An or Bn

SA00133

Waveform 3. Propagation Delay, Enable to Output, and Enable

Pulse Width

VM

VM

VM

VM

VM

VM

An

or

Bn

CPAB or CPBA,

LEAB or LEBA

SA00323

Note: The shaded areas indicate when the input is permitted

to change for predictable output performance.

Waveform 4. Data Setup and Hold Times

OEBA

OEAB

An or Bn

VM

VM

VM

SA00135

Waveform 5. 3-State Output Enable Time to High Level

and Output Disable Time from High Level

OEBA

OEAB

VM

VM

VM

An or Bn

SA00136

Waveform 6. 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