Philips Semiconductors

Product specification

74ALS651/74ALS651-1

74ALS652/74ALS652-1

Transceiver/register

1991 Feb 08

8

AC ELECTRICAL CHARACTERISTICS FOR 74ALS652/74ALS652-1

LIMITS

SYMBOL

PARAMETER

TEST CONDITION

UNIT

MIN

MAX

Maximum clock frequency

Waveform 1

100

MHz

Propagation delay

CPBA to An, CPAB to Bn

Waveform 1

5.0

6.0

13.0

13.0

ns

Propagation delay

An to Bn or Bn to An

Waveform NO TAG, 3

2.0

4.0

8.0

9.0

ns

Propagation delay

SBA to An or SAB to Bn (A or B Low)

Waveform NO TAG, 3

4.0

5.0

11.0

11.0

ns

Propagation delay

SBA to An or SAB to Bn (A or B High)

Waveform NO TAG, 3

6.0

5.0

14.0

11.0

ns

Output enable time

OEBA to An

Waveform 7

Waveform 8

2.0

5.0

8.0

11.0

ns

Output disable time

OEBA to An

Waveform 7

Waveform 8

2.0

3.0

8.0

10.0

ns

Output enable time

OEAB to Bn

Waveform 7

Waveform 8

2.0

5.0

9.0

11.0

ns

Output disable time

OEAB to Bn

Waveform 7

Waveform 8

3.0

5.0

11.0

13.0

ns

AC SETUP REQUIREMENTS

LIMITS

SYMBOL

PARAMETER

TEST CONDITION

UNIT

MIN

MAX

Setup time, High or Low

An or Bn to CPAB or CPBA

Waveform 4

5.0

5.0

ns

Hold time, High or Low

An or Bn to CPAB or CPBA

Waveform 4

0.0

1.0

ns

OEBA to OEAB or OEAB to OEBA

Waveform 5, 6

5.0

5.0

ns

Hold time, High or Low

OEBA to OEAB or OEAB to OEBA

Waveform 5, 6

0.0

0.0

ns

Pulse width, High or Low

CPAB or CPBA

Waveform 1

6.0

4.0

ns

NOTE:

1. Setup time is to protect against current surge caused by enabling 16 outputs (24mA per output) simultaneously.