74HC74 Datasheet PDF – Dual D-type Flip-Flop

This is one of the TTL(Transistor-Transistor Logic) IC types.

Part Number: 74HC74

Function: Dual D-Type Positive-Edge-Triggered Flip-Flop

Package: 14 Pin DIP, SO, SOIC, TSSOP, CIP

Manufacturer: NXP, TI, Philips, ON Semiconductor

74HC74 Flip-Flop


The 74HC74 is identical in pinout to the LS74. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. This device consists of two D flip−flops with individual Set, Reset, and Clock inputs. Information at a D−input is transferred to the corresponding Q output on the next positive going edge of the clock input. Both Q and Q outputs are available from each flip−flop. The Set and Reset inputs are asynchronous.

Truth Table
74HC74 truth table


1. Output Drive Capability: 10 LSTTL Loads

2. Outputs Directly Interface to CMOS, NMOS, and TTL

3. Operating Voltage Range: 2.0 to 6.0 V

4. Low Input Current: 1.0 A

5. High Noise Immunity Characteristic of CMOS Devices

6. In Compliance with the JEDEC Standard No. 7A Requirements


74HC74 Pinout

74HC74 datasheet pinout

The 74HC74 and 74HCT74 are dual positive edge triggered D-type flip-flop. They have individual data (nD), clock (nCP), set (nSD) and reset (nRD) inputs, and complementary nQ and nQ outputs. Data at the nD-input, that meets the set-up and hold time requirements on the LOW-to-HIGH clock transition, is stored in the flip-flop and appears at the nQ output. Schmitt-trigger action in the clock input, makes the circuit highly tolerant to slower clock rise and fall times. Inputs include clamp diodes that enable the use of current limiting resistors to interface inputs to voltages in excess of VCC.

Other data sheets are available within the file:

74HC74BQ, 74HC74CU, 74HC74D, 74HC74N, SN74HC74N

Related Posts

74HC74 Datasheet PDF Download

74HC74 pdf


Related articles across the web