This is one of the digital integrated circuits (ICs), belonging to the 74 series logic family consisting of double D flip-flops. These ICs are used for data storage and signal synchronization and are primarily utilized in digital logic circuits.
Part number: 74HC74, 74HC74N, 74HC74DB
Functions: Dual D-type flip-flop with set and reset
Package information: DIP 14, SO14, SSOP14, TSSOP 14 Type
Manufacturer: Philips Semiconductor
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Description
The 74HC74, 74HCT74 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The set and reset are asynchronous active LOW inputs and operate independently of the clock input. Information on the data input is transferred to the Q output on the LOW-to-HIGH transition of the clock pulse. The D inputs must be stable one set-up time prior to the LOW-to-HIGH clock transition for predictable operation. Schmitt-trigger action in the clock input makes the circuit highly tolerant to slower clock rise and fall times.
Pinout
Each D flip-flop has pins such as data (D) input, clock input, and reset input. The data input (D) represents the value stored in the flip-flop, and the clock input (Clock) controls the synchronization of signals that store or output data. The reset input (Reset) is used to initialize the state of the flip-flop.
The 74HC74 operates with a positive clock trigger (D flip-flop), and is triggered by the rising or falling edge of the clock signal. Each time the clock signal changes, the value of the data input (D) is stored in the flip-flop, and the stored value is used as the output.
Functions
1. Output capability: standard
2. ICC category: flip-flops
Block diagram
It is mainly used in various digital logic circuits, such as digital signal storage, timing control, shift registers, counters, and synchronization circuits. Additionally, the 74HC series features high-speed operation and low power consumption, making it easy to apply to a variety of digital systems.