Philips Semiconductors

Product specification

74ALS373/74ALS374

Latch/flip-flop

1991 Feb 08

5

LOGIC DIAGRAM – 74ALS374

VCC = Pin 20

D0

D

CP Q

Q0

3

2

D1

D

CP Q

Q1

4

5

D2

D

CP Q

Q2

7

6

D3

D

CP Q

Q3

8

9

D4

D

CP Q

Q4

13

12

D5

D

CP Q

Q5

14

15

D6

D

CP Q

Q6

17

16

D7

D

CP Q

Q7

18

19

11

1

OE

CP

GND = Pin 10

SF00257

FUNCTION TABLE – 74ALS374

INPUTS

INTERNAL REGISTER

OUTPUTS

OPERATING MODE

OE

CP

Dn

INTERNAL REGISTER

Q0 – Q7

OPERATING MODE

L

↑

l

L

L

Load and read register

L

↑

h

H

H

Load and read register

L

↑

X

NC

NC

Hold

H

↑

X

NC

Z

Disable outputs

H

↑

Dn

Dn

Z

Disable outputs

H = High-voltage level

h

= High state must be present one setup time before the Low-to-High clock transition

L

= Low-voltage level

l

= Low state must be present one setup time before the Low-to-High clock transition

NC= No change

X = Don’t care

Z = High impedance “off” state

↑ = Low-to-High clock transition

↑ = Not Low-to-High clock transition

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

Supply voltage

–0.5 to +7.0

V

Input voltage

–0.5 to +7.0

V

Input current

–30 to +5

mA

Voltage applied to output in High output state

V

Current applied to output in Low output state

48

mA

Operating free-air temperature range

0 to +70

°C

Storage temperature range

–65 to +150

°C