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MM74C373
(Rev.:2004)

3-STATE Octal D-Type Latch • 3-STATE Octal D-Type Flip-Flop

Fairchild Semiconductor 

October 1987

Revised January 2004

MM74C373 • MM74C374

3-STATE Octal D-Type Latch •

3-STATE Octal D-Type Flip-Flop

General Description

The MM74C373 and MM74C374 are integrated, comple-

mentary MOS (CMOS), 8-bit storage elements with 3-

STATE outputs. These outputs have been specially

designed to drive high capacitive loads, such as one might

find when driving a bus, and to have a fan out of 1 when

driving standard TTL. When a high logic level is applied to

the OUTPUT DISABLE input, all outputs go to a high

impedance state, regardless of what signals are present at

the other inputs and the state of the storage elements.

The MM74C373 is an 8-bit latch. When LATCH ENABLE is

high, the Q outputs will follow the D inputs. When LATCH

ENABLE goes low, data at the D inputs, which meets the

set-up and hold time requirements, will be retained at the

outputs until LATCH ENABLE returns high again.

The MM74C374 is an 8-bit, D-type, positive-edge triggered

flip-flop. Data at the D inputs, meeting the set-up and hold

time requirements, is transferred to the Q outputs on posi-

tive-going transitions of the CLOCK input.

Both the MM74C373 and the MM74C374 are being assem-

bled in 20-pin dual-in-line packages with 0.300” pin cen-

ters.

Features

s Wide supply voltage range: 3V to 15V

s High noise immunity: 0.45 VCC (typ.)

s Low power consumption

s TTL compatibility:

Fan out of 1driving standard TTL

s Bus driving capability

s 3-STATE outputs

s Eight storage elements in one package

s Single CLOCK/LATCH ENABLE and OUTPUT DIS-

ABLE control inputs

s 20-pin dual-in-line package with 0.300” centers takes

half the board space of a 24-pin package

Ordering Code:

Order Number Package Number

Package Description

MM74C373M

(Note 1)

M20B

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

MM74C373N

N20A

20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide

MM74C374N

N20A

20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide

Note 1: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

© 2004 Fairchild Semiconductor Corporation DS005906

www.fairchildsemi.com

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