MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

1

REV 2

9/95

Low-Voltage CMOS

Octal D-Type Flip-Flop

Flow Through Pinout

With 5V-Tolerant Inputs and Outputs

(3-State, Non-Inverting)

The MC74LCX574 is a high performance, non–inverting octal D–type

flip–flop operating from a 2.7 to 3.6V supply. High impedance TTL

compatible inputs significantly reduce current loading to input drivers

while TTL compatible outputs offer improved switching noise

performance. A VI specification of 5.5V allows MC74LCX574 inputs to be

safely driven from 5V devices.

The MC74LCX574 consists of 8 edge–triggered flip–flops with

individual D–type inputs and 3–state true outputs. The buffered clock and

buffered Output Enable (OE) are common to all flip–flops. The eight

flip–flops will store the state of individual D inputs that meet the setup and

hold time requirements on the LOW–to–HIGH Clock (CP) transition. With

the OE LOW, the contents of the eight flip–flops are available at the

outputs. When the OE is HIGH, the outputs go to the high impedance

state. The OE input level does not affect the operation of the flip–flops.

The LCX574 flow through design facilitates easy PC board layout.

Substantially Reduces System Power Requirements

Pinout: 20–Lead (Top View)

19

20

18

17

16

15

14

2

1

34567

VCC

13

8

12

9

11

10

O0

O1

O2

O3

O4

O5

O6

O7

CP

OE

D0

D1

D2

D3

D4

D5

D6

D7

GND

DW SUFFIX

PLASTIC SOIC

CASE 751D–04

DT SUFFIX

PLASTIC TSSOP

CASE 948E–02

20

1

20

1

M SUFFIX

PLASTIC SOIC EIAJ

CASE 967–01

20

1

SD SUFFIX

PLASTIC SSOP

CASE 940C–03

20

1

PIN NAMES

Function

Output Enable Input

Clock Pulse Input

Data Inputs

3–State Outputs

Pins

OE

CP

D0–D7

O0–O7

MC74LCX574

LOW–VOLTAGE CMOS

OCTAL D–TYPE FLIP–FLOP