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

Manufacturer: Hitachi Semiconductor (now Renesas)

Datasheet Details

Part number	HD74HCT74A
Manufacturer	Hitachi Semiconductor (now Renesas)
File Size	57.83 KB
Description	Dual D-type Positive Edge-triggered Flip Flops with Clear and Preset
Download	HD74HCT74A Download (PDF)

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.

Preset and clear are independent of the clock and accomplished by a low level at the appropriate input.

HD74HCT74A Dual D–type Positive Edge–triggered Flip Flops with Clear and Preset ADE-205-290 (Z) 1st.

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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