Philips Semiconductors

Product specification

74ALS563A/74ALS564A

Latch/flip-flop

1996 Jul 01

5

LOGIC DIAGRAM – 74ALS564A

VCC = Pin 20

D0

D

CP Q

Q0

2

19

D1

D

CP Q

Q1

3

18

D2

D

CP Q

Q2

4

17

D3

D

CP Q

Q3

5

16

D4

D

CP Q

Q4

6

15

D5

D

CP Q

Q5

7

14

D6

D

CP Q

Q6

8

13

D7

D

CP Q

Q7

9

12

11

OE

CP

GND = Pin 10

SC00117

1

FUNCTION TABLE – 74ALS564A

INPUTS

OUTPUTS

INTERNAL

OPERATING MODE

OE

CP

Dn

REGISTER

Q0 – Q7

OPERATING MODE

L

↑

l

L

H

Load and read register

L

↑

h

H

L

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