74HCT166 View Datasheet(PDF) - Philips Electronics

Part Name

Description

MFG CO.

74HCT166

8-bit parallel-in/serial-out shift register

Philips Electronics 

Philips Semiconductors

8-bit parallel-in/serial-out shift register

Product specification

74HC/HCT166

Fig.4 Functional diagram.

FUNCTION TABLE

OPERATING MODES

PE

parallel load

I

I

serial shift

h

h

hold “do nothing”

X

CE

I

I

I

I

h

INPUTS

CP

↑

↑

↑

↑

X

DS

X

X

I

h

X

D0-D7

I-I

h-h

X-X

X-X

X-X

Qn REGISTER

Q0

L

H

Q1-Q6

L-L

H-H

L

q0 - q5

H

q0 - q5

q0

q1 - q6

Notes

1. H = HIGH voltage level

h = HIGH voltage level one set-up time prior to the LOW-to-HIGH CP transition

L = LOW voltage level

I = LOW voltage level one set-up time prior to the LOW-to-HIGH CP transition

q = lower case letters indicate the state of the referenced output one set-up time prior to the

LOW-to-HIGH CP transition

X = don’t care

↑ = LOW-to-HIGH CP transition

OUTPUT

Q7

L

H

q6

q6

q7

December 1990

4

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