HD74HCT74A - Dual D-type Positive Edge-triggered Flip Flops with Clear and Preset

Product Overview

Hitachi Semiconductor

Part number	HD74HCT74A
Manufacturer	Hitachi Semiconductor
File Size	57.83 KB
Description	Dual D-type Positive Edge-triggered Flip Flops with Clear and Preset
Datasheet	HD74HCT74A Datasheet
Additional preview pages of the HD74HCT74A datasheet.

The HD74HCT74A has independent data, preset, clear, and clock inputs Q and Q outputs in a 14 pin package.

The logic level present at the data input is transferred to the output during the positive going transition of the clock pulse.

VCC = 4.5 to 5.5 V operation.
Input terminal has protection diode Function Table Inputs PRE L H L H H H CLR H L L H H H CLK X X X ↑ ↑ L D X X X H L X Outputs Q H L H H L Q0.
1 Q L H H.
1 L H Q0 H : High level L : Low level X : Immaterial ↑ : Low to high transition Q0 : Level to Q before the indicated steady state input conditions were established. Note : 1. Q and Q will remain high as long as preset and clear are low, but Q and Q are unpredictable, if preset and cle.

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Published: Mar 23, 2005 |