Octal D-Type Latch

with 3-State Outputs

The MC74AC564/74ACT564 is a high-speed, low power octal

flip-flop with a buffered common Clock (CP) and a buffered

common Output Enable (OE).

The information presented to the D inputs is stored in the flip-flops

on the LOW-to-HIGH Clock (CP) transition.

The MC74AC564/74ACT564 device is functionally identical to

the MC74AC574/74ACT574, but with inverted outputs.

Interface with Microprocessors

Outputs

19

20

18

17

16

15

14

2

1

34567

13

8

12

9

11

10

CP

OE

GND

Figure 1. Pinout: 20−Lead Packages Conductors

(Top View)

PIN NAMES

Data Inputs

CP

Clock Pulse Input

OE

3-State Output Enable Input

3-State Outputs

© Semiconductor Components Industries, LLC, 2006

June, 2006 − Rev. 5

1

Publication Order Number:

MC74AC564/D

MC74AC564

MC74ACT564

OCTAL D-TYPE

LATCH WITH

3-STATE OUTPUTS

N SUFFIX

CASE 738-03

PLASTIC

DW SUFFIX

CASE 751D-04

PLASTIC

Figure 2. LOGIC SYMBOL

CP

OE