HD74BC374AT Datasheet

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HD74BC374A

Octal D Type Flip Flops With 3 State Outputs

ADE-205-010A(Z)

Rev. 1

March 1993

Description

The HD74BC374A provides high drivability and operation equal to or better than high speed bipolar

standard logic IC by using Bi-CMOS process. The device features low power dissipation that is about 1/5

of high speed bipolar logic IC, when the frequency is 10 MHz. The device has eight edge triger D type flip

flop with three state outputs in a 20 pin package. Data at the D inputs meeting set up reguirements, are

transferred to the Q outputs on positive going transitions of the clock input. When the latch enable goes

low, data at the D inputs will be retained at the outputs until latch enable returns high again. When a high

logic level is applied to the output control input, all outputs go to a high impedance state, regardless of what

signals are present at the other inputs and the state of the storage elements.

Features

鈥?/div>

Input/Output are at high impedance state when power supply is off.

Built in input pull up circuit can make input pins be open, when not used.

TTL level input

Wide operating temperature range

Ta = 鈥?0 to + 85擄C

Function Table

Inputs

High level

Low level

Immaterial

High impedance

Low to high transition

Output

No change

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