74LS279 Quad S-R Latch – DIP-16

The 74279 is a TTL logic integrated circuit containing four independent Set-Reset (SR) latches in a single package. It provides asynchronous data storage, allowing each latch to change state immediately when the Set (S) or Reset (R) input is activated, without requiring a clock signal. This makes the 74279 ideal for state memory, signal debouncing, digital sequencing, and control logic applications. Operating on a standard 5V TTL supply, it offers reliable state retention and fast response in digital systems.

Features

- Quad SR latch configuration

- Four independent set-reset latches

- Asynchronous operation without clock input

- Separate set and reset control inputs

- Standard TTL logic compatibility

- Single 5V supply operation

- Fast switching response

- Stable state retention until changed

- Suitable for control and sequencing circuits

- Useful for switch debouncing

- DIP-16 through-hole package

- Breadboard-friendly design

- Reliable TTL logic performance

- Easy PCB integration

Specifications

- Model: 74279

- Device Type: Quad Set-Reset Latch IC

- 0Logic Family: TTL

- Number of Latches: 4

- Control Inputs: Set and Reset

- Supply Voltage: 5V

- Input Logic Levels: TTL Compatible

- Output Type: Standard TTL Output

- Propagation Delay (Typical): 20ns

- Power Consumption (Typical): 15mW per latch

- Package Type: 16-Pin DIP

- Mounting Type: Through-Hole

- Operating Temperature Range: 0°C to +70°C

- Application Type: State Storage and Control Logic

Links

- 3D Model

- Datasheet

Tutorials

SR Latch Circuit - Basic Introduction