MC74HC165AFL2 データシートの表示（PDF） - ON Semiconductor

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MC74HC165AFL2

8-Bit Serial or Parallel-Input Serial-Output Shift Register

ON Semiconductor 

MC74HC165A

SWITCHING WAVEFORMS

CLOCK

OR CLOCK INHIBIT

tr

90%

50%

10%

tw

QH OR QH

90%

50%

10%

1/fmax

tPLH

tTLH

tf

tPHL

tTHL

VCC

GND

tw

SERIAL SHIFT/

50%

PARALLEL LOAD

tPLH

QH OR QH

50%

VCC

50%

GND

tPHL

Figure 1. Serial–Shift Mode

Figure 2. Parallel–Load Mode

tr

INPUT H

tPLH

QH OR QH

90%

50%

10%

90%

50%

10%

tTLH

tf

VCC

GND

tPHL

tTHL

Figure 3. Parallel–Load Mode

INPUTS A-H

SERIAL SHIFT/

PARALLEL LOAD

VALID

VCC

50%

GND

tsu

th

VCC

GND

ASYNCHRONOUS PARALLEL

LOAD

(LEVEL SENSITIVE)

Figure 4. Parallel–Load Mode

INPUT SA

CLOCK

OR CLOCK INHIBIT

VALID

SERIAL SHIFT/

VCC

VCC

PARALLEL LOAD

50%

50%

GND

GND

tsu

th

tsu

th

CLOCK

VCC

50%

VCC

OR CLOCK INHIBIT

50%

GND

GND

Figure 5. Serial–Shift Mode

Figure 6. Serial–Shift Mode

CLOCK INHIBIT

CLOCK 2 INHIBITED

VCC

50%

GND

tsu

trec

VCC

CLOCK

50%

GND

Figure 7. Serial–Shift, Clock–Inhibit Mode

DEVICE

UNDER

TEST

TEST POINT

OUTPUT

CL*

*Includes all probe and jig capacitance

Figure 8. Test Circuit

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