Rev.2.00, Oct 06, 2005 page 1 of 5

HD74HC91

8-bit Shift Register

REJ03D0696-0200

(Previous ADE-205-429)

Rev.2.00

Oct 06, 2005

Description

This serial-in, serial-out, 8-bit shift register is composed of eight R-S master-slave flip-flops, input gating, and a clock

drive. Single-rail data and input control are gated through inputs A and B and an internal inverter to form the

complementary inputs to the first bit of the shift register. Drive for the internal common clock line is provided by an

inverting clock driver. This clock pulse inverter/driver causes these circuits to shift information one bit on the positive

edge of an input clock pulse.

Features

• High Speed Operation: t

• High Output Current: Fanout of 10 LSTTL Loads

• Wide Operating Voltage: V

• Low Input Current: 1 µA max

• Low Quiescent Supply Current: I

• Ordering Information

Part Name

Package Type

Package Code

(Previous Code)

Package

Abbreviation

Taping Abbreviation

(Quantity)

HD74HC91RPEL

SOP-14 pin (JEDEC)

PRSP0014DE-A

(FP-14DNV)

RP

EL (2,500 pcs/reel)

Function Table

Inputs

Outputs

A

B

Q

H

H

H

H

L

L

X

L

H

X

L

L

H

H :

High level

L :

Low level

X :

Irrelevant

Reference bit time, clock low

Bit time after 8 low-to-high clock transitions