Philips Semiconductors

Product specification

74LVC574A

Octal D-type flip-flop with 5-volt tolerant

inputs/outputs; positive edge-trigger (3-State)

1998 Jul 29

6

AC CHARACTERISTICS

LIMITS

SYMBOL

PARAMETER

WAVEFORM

UNIT

MIN

MAX

MIN

MAX

TYP

Propagation delay

1, 4

1.5

4.8

7.0

1.5

8.0

21

ns

3-State output enable time

2, 4

1.5

4.0

7.5

1.5

8.5

17

ns

3-State output disable time

2, 4

1.5

3.5

6.0

1.5

6.5

11

ns

Clock pulse width HIGH or LOW

1

3.4

1.7

–

3.4

–

–

ns

Setup time

3

2.0

0.3

–

2.0

–

–

ns

Hold time

3

1.5

–0.2

–

1.5

–

–

ns

Maximum clock pulse frequency

1

100

–

80

–

–

MHz

NOTE:

AC WAVEFORMS

output load.

CP INPUT

Qn OUTPUT

GND

SA00394

clock pulse width, output transition times and the maximum

clock pulse frequency.

VM

SW00107

GND

Dn

INPUT

GND

VM

Qn

OUTPUT

CP

INPUT

NOTE: The shaded areas indicate when the input is permitted to change

for predictable output performance.

CP input.

nOE INPUT

GND

LOW-to-OFF

OFF-to-LOW

HIGH-to-OFF

OFF-to-HIGH

GND

outputs

enabled

outputs

enabled

outputs

disabled

SW00207

Waveform 3. 3-State enable and disable times.

TEST CIRCUIT

PULSE

GENERATOR

D.U.T.

50pF

Open

GND

500

Ω

500

Ω

t 2.7V

2.7V – 3.6V

2.7V

Test

GND

Open

SY00003

Waveform 4. Load circuitry for switching times.