SN74LS74 Datasheet PDF – D-type Flip-Flop

Part Number: SN74LS74

Function: Dual D-type pos.-edge-triggered Flip-Flops

Package: DIP 16 Pin Type

Manufacturer: Texas Instruments


SN74LS74 datasheet



These devices contain two independent D-type positive-edge-triggered flip-flops. A low level at the preset or clear inputs sets or resets the outputs regardless of the levels of the other inputs. When preset and clear are inactive (high), data at the D input meeting the setup time requirements are transferred to the outputs on the positive-going edge of the clock pulse. Clock triggering occurs at a voltage level and is not directly related to the rise time of the clock pulse. Following the hold time interval, data at the D input may be changed without affecting the levels at the outputs.


1. 46A, 47A, LS47
– Open-Collector Outputs
– Drive Indicators Directly
– Lamp-Test Provision
– Leading / Trailing Zero Supperssion

2. 48, LS48
– Internal Pull-Ups Eliminate Need for External Resistors
– Lamp-Test Provision
– Leading / Trailing Zero Suppression.

3. LS49
– Open-Collector Outputs
– Blanking Input



SN74LS74 Datasheet PDF Download

SN74LS74 pdf

Other data sheets are available within the file: 5447, 5448, 5449,7446, SN5446A