Philips Semiconductors

Product specification

74F651A/74F652A

Transceivers/registers

1999 Jun 23

8

AC ELECTRICAL CHARACTERISTICS FOR 74F651A

LIMITS

SYMBOL

PARAMETER

TEST CONDITION

UNIT

MIN

TYP

MAX

MIN

MAX

Maximum clock frequency

Waveform 1

155

175

140

ns

Propagation delay

CPAB or CPBA to An or Bn

Waveform 1

4.5

5.5

7.0

7.5

10.0

10.5

4.0

5.0

11.0

11.0

ns

Propagation delay

An or Bn to Bn or An

Waveform 2, 3

2.5

4.0

4.5

6.5

7.5

9.0

2.0

4.0

8.5

10.0

ns

Propagation delay

SAB or SBA to An or Bn

Waveform 2, 3

4.0

5.0

7.0

7.0

10.0

10.0

3.5

4.5

12.0

10.0

ns

Output enable time

OEAB or OEBA to An or Bn

Waveform 7, 8

3.0

3.5

5.0

6.0

8.0

8.5

2.5

3.0

8.5

9.0

ns

Output disable time

OEAB or OEBA to An or Bn

Waveform 7, 8

1.5

2.5

4.0

6.0

7.0

8.5

1.0

2.0

7.5

9.0

ns

AC SETUP REQUIREMENTS FOR 74F651A

LIMITS

SYMBOL

PARAMETER

TEST CONDITION

UNIT

MIN

TYP

MAX

MIN

MAX

Setup time, high or low

An or Bn to CPAB or CPBA

Waveform 4

3.5

4.0

4.0

4.5

ns

Hold time, high or low

An or Bn to CPAB or CPBA

Waveform 4

0

0

0

0

ns

Setup time, high or low

OEBA to OEAB or OEAB to OEBA

Waveform 5, 6

5.0

5.0

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

4.5

3.5

4.5

4.0

ns

Note to AC setup requirements for 74F651A:

1. Setup time is to protect against surge current caused by enabling 16 outputs (48mA per output) simultaneously.