Philips Semiconductors

Product specification

74F74

Dual D-type flip-flop

1996 Mar 12

3

LOGIC DIAGRAM

VCC = Pin 14

GND = Pin 7

5, 9

6, 8

Q

Q

4, 10

1, 13

3, 11

2, 12

SD

RD

CP

D

SF00048

FUNCTION TABLE

INPUTS

OUTPUTS

OPERATING

SD

RD

CP

D

Q

Q

MODE

L

H

X

X

H

L

Asynchronous set

H

L

X

X

L

H

Asynchronous reset

L

L

X

X

H

H

Undetermined*

H

H

↑

h

H

L

Load ”1”

H

H

↑

l

L

H

Load ”0”

H

H

↑

X

NC

NC

Hold

NOTES:

H = High voltage level

h

= High voltage level one setup time prior to low-to-high clock

transition

L

= Low voltage level

l

= Low voltage level one setup time prior to low-to-high clock

transition

NC= No change from the previous setup

X = Don’t care

↑ = Low-to-high clock transition

↑ = Not low-to-high clock transition

*

= This setup is unstable and will change when either set or reset

return to the high level.

ABSOLUTE MAXIMUM RATINGS

(Operation beyond the limit set forth in this table may impair the useful life of the device.

Unless otherwise noted these limits are over the operating free air temperature range.)

SYMBOL

PARAMETER

RATING

UNIT

VCC

Supply voltage

–0.5 to +7.0

V

VIN

Input voltage

–0.5 to +7.0

V

IIN

Input current

–30 to +5

mA

VOUT

Voltage applied to output in high output state

–0.5 to VCC

V

IOUT

Current applied to output in low output state

40

mA

T

Operating free air temperature range

Commercial range

0 to +70

°C

Tamb

Operating free air temperature range

Industrial range

–40 to +85

°C

Tstg

Storage temperature range

–65 to +150

°C

RECOMMENDED OPERATING CONDITIONS

SYMBOL

PARAMETER

LIMITS

UNIT

SYMBOL

PARAMETER

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5.0

5.5

V

VIH

High-level input voltage

2.0

V

VIL

Low-level input voltage

0.8

V

IIk

Input clamp current

–18

mA

IOH

High-level output current

–1

mA

IOL

Low-level output current

20

mA

T

b

Operating free air temperature range

Commercial range

0

+70

°C

Tamb

O erating free air tem erature range

Industrial range

–40

+85

°C