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© Koninklijke Philips Electronics N.V. 2004. All rights reserved.

Product data sheet

Rev. 03 — 12 November 2004

5 of 20

Philips Semiconductors

74HC75

Quad bistable transparant latch

6.2 Pin description

7.

Functional description

7.1 Function table

[1]

H = HIGH voltage level;

L = LOW voltage level;

q = lower case letters indicate the state of the referenced output one set-up time prior to the HIGH-to-LOW

LEnn transition;

X = don’t care.

Table 3:

Pin description

Symbol

Pin

Description

1Q

1

complementary latch output 1

1D

2

data input 1

2D

3

data input 2

LE34

4

latch enable input for latches 3 and 4 (active HIGH)

5

positive supply voltage

3D

6

data input 3

4D

7

data input 4

4Q

8

complementary latch output 4

4Q

9

latch output 4

3Q

10

latch output 3

3Q

11

complementary latch output 3

GND

12

ground (0 V)

LE12

13

latch enable input for latches 1 and 2 (active HIGH)

2Q

14

complementary latch output 2

2Q

15

latch output 2

1Q

16

latch output 1

Table 4:

Function table [1]

Operating mode

Input

Output

LEnn

nD

nQ

nQ

Data enabled

H

L

L

H

HHHL

Data latched

L

X

q

q