HIT HD74HC75 Datasheet

HD74HC75

Quad. Bistable Latches

Description

This latch is ideally suited for use as temporary storage for binary information processing, input/output, and
indicator units. Information present at the data (D) input is transferred to the Q output when the latch
enable (LE) is high. The Q output will follow the data input as long as the enable remains high. when the
enable goes low, the information that was present at the data input at the time the transition occurred is
retained at thte Q output unit the enable is permitted to go high again.

Features

• High Speed Operation: tpd (D to Q) = 12.5 ns typ (CL = 50 pF)

• High Output Current: Fanout of 10 LSTTL Loads

• Wide Operating Voltage: VCC = 2 to 6 V

• Low Input Current: 1 µA max

• Low Quiescent Supply Current: ICC (static) = 2 µA max (Ta = 25°C)

Function Table

Inputs Outputs
D Latch Enable Q Q

LH L H
HH H L
XL Q

0

Q

0

HD74HC75

Pin Arrangement

Q0a

1

16

Q0a

Block Diagram

Data Q

D0a

D1a

LEb

V

D0b

D1b

Q1b

CC

2

3

4

5

6

7

8

(Top view)

15

14

13

12

11

10

Q1a

Q1a

LEa

GND

Q

0b

Q0b

9

Q1b

Q

Latch
Enable

2

HD74HC75

DC Characteristics

Ta = –40 to

Ta = 25°C

Item Symbol V

Input voltage V

IH

(V) Min Typ Max Min Max Unit Test Conditions

CC

2.0 1.5 — — 1.5 — V

4.5 3.15 — — 3.15 —

6.0 4.2 — — 4.2 —

V

IL

2.0 — — 0.5 — 0.5 V

4.5 — — 1.35 — 1.35

6.0 — — 1.8 — 1.8

Output voltage V

OH

2.0 1.9 2.0 — 1.9 — V Vin = VIH or VILIOH = –20 µA

4.5 4.4 4.5 — 4.4 —

6.0 5.9 6.0 — 5.9 —

4.5 4.18 — — 4.13 — IOH = –4 mA

6.0 5.68 — — 5.63 — IOH = –5.2 mA

V

OL

2.0 — 0.0 0.1 — 0.1 V Vin = VIH or VILIOL = 20 µA

4.5 — 0.0 0.1 — 0.1

6.0 — 0.0 0.1 — 0.1

4.5 — — 0.26 — 0.33 IOL = 4 mA

6.0 — — 0.26 — 0.33 IOL = 5.2 mA
Input current Iin 6.0 — — ±0.1 — ±1.0 µA Vin = VCC or GND
Quiescent supply

I

CC

6.0 — — 2.0 — 20 µA Vin = VCC or GND, Iout = 0 µA
current

+85°C

3