HCF40104(2002) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

HCF40104
(Rev.:2002)

4-BIT BIDIRECTIONAL UNIVERSAL SHIFT REGISTER

STMicroelectronics 

HCF40104B

IINPUT EQUIVALENT CIRCUIT

FUNCTIONAL DIAGRAM

PIN DESCRIPTION

PIN No

1

3, 4, 5, 6

15, 14, 13,

12

2

7

11

9, 10

8

16

SYMBOL

OUTPUT

ENABLE

D0 to D3

NAME AND FUNCTION

Output Enable

Inputs

Q0 to Q3 Outputs

Shift Right IN Shift Righ Input

Shift Left IN Shift Left Input

CLOCK Clock Input

S0, S1 Input (High)

VSS

Negative Supply Voltage

VDD

Positive Supply Voltage

TRUTH TABLE

CLOCK

X

X : Don’t Care

MODE SELECT

S0

S1

L

L

H

L

L

H

H

H

X

X

OUTPUT ENABLE

ACTION

H

RESET

H

SHIFT RIGHT (Q0

toward Q3)

H

SHIFT LEFT (Q3

toward Q0)

H

PARALLEL LOAD

Operations occur as

L

shown above, but out-

puts assume high

impedance

2/10

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