5-1

FACT DATA

Parallel D Register with Enable

The MC74AC378/74ACT378 is a 6-bit register with a buffered common Enable.

This device is similar to the MC74AC174/74ACT174, but with common Enable

rather than common Master Reset.

• 6-Bit High-Speed Parallel Register

• Positive Edge-Triggered D-Type Inputs

• Fully Buffered Common Clock and Enable Inputs

• Outputs Source/Sink 24 mA

• ′ACT378 Has TTL Compatible Inputs

15

16

14

13

12

11

10

2

1

3

4

5

6

7

VCC

9

8

Q5

D5

D4

Q4

D3

Q3

CP

E

Q0

D0

D1

Q1

D2

Q2

GND

PIN NAMES

E

Enable Input

D0–D5

Data Inputs

CP

Clock Pulse Input

Q0–Q5

Outputs

TRUTH TABLE

Inputs

Outputs

E

CP

Dn

Qn

H

X

No Change

L

H

H

L

L

L

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

= LOW-to-HIGH Transition

MC74AC378

MC74ACT378

PARALLEL

D REGISTER

WITH ENABLE

N SUFFIX

CASE 648-08

PLASTIC

D SUFFIX

CASE 751B-05

PLASTIC

LOGIC SYMBOL

E

D0 D1 D2 D3 D4 D5

CP

Q0 Q1 Q2 Q3 Q4 Q5