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MM74HCT74

Dual D-Type Flip-Flop with Preset and Clear

Fairchild Semiconductor 

March 2008

MM74HCT74

Dual D-Type Flip-Flop with Preset and Clear

Features

■ Typical propagation delay: 20ns

■ Low quiescent current: 40µA maximum (74HCT Series)

■ Low input current: 1µA maximum

■ Fanout of 10 LS-TTL loads

■ Meta-stable hardened

General Description

The MM74HCT74 utilizes advanced silicon-gate CMOS

technology to achieve operation speeds similar to the

equivalent LS-TTL part. It possesses the high noise

immunity and low power consumption of standard

CMOS integrated circuits, along with the ability to drive

10 LS-TTL loads.

This flip-flop has independent data, preset, clear, and

clock inputs and Q and Q outputs. The logic level

present at the data input is transferred to the output

during the positive-going transition of the clock pulse.

Preset and clear are independent of the clock and

accomplished by a low level at the appropriate input.

The 74HCT logic family is functionally and pin-out

compatible with the standard 74LS logic family. All inputs

are protected from damage due to static discharge by

internal diode clamps to VCC and ground.

MM74HCT devices are intended to interface between

TTL and NMOS components and standard CMOS

devices. These parts are also plug-in replacements for

LS-TTL devices and can be used to reduce power

consumption in existing designs.

Ordering Information

Order Number

MM74HCT74M

MM74HCT74SJ

MM74HCT74MTC

MM74HCT74N

Package

Number

Package Description

M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow

M14D 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

MTC14 14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm

Wide

N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide

Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering number.

All packages are lead free per JEDEC: J-STD-020B standard.

©1984 Fairchild Semiconductor Corporation

MM74HCT74 Rev. 1.4.0

www.fairchildsemi.com

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