8.4 Device Functional Modes

The Operating Mode Table and the Output Function Table list the functional modes of the SN74HCS165.

Table 8-1. Operating Mode Table

INPUTS(1)

FUNCTION

SH/LD

CLK

CLK INH

L

X

X

Parallel load

H

H

X

No change

H

X

H

No change

H

L

↑

Shift(2)

H

↑

L

Shift(2)

(1)

H = High Voltage Level, L = Low Voltage Level, X = Don't Care,

↑ = Low to High transition

(2)

Shift : Content of each internal register shifts towards serial

Table 8-2. Output Function Table

INTERNAL REGISTERS(1) (2)

OUTPUTS(2)

A — G

H

Q

Q

X

L

L

H

X

H

H

L

(1)

Internal registers refer to the shift registers inside the device.

These values are set by either loading data from the parallel

inputs, or by clocking data in from the serial input.

(2)

H = High Voltage Level, L = Low Voltage Level, X = Don't Care

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SN74HCS165

SCLS828A – AUGUST 2020 – REVISED MAY 2021

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