MC74HC161A 데이터 시트보기 (PDF) - ON Semiconductor

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MC74HC161A

Presettable Counters

ON Semiconductor 

MC74HC161A, MC74HC163A

SWITCHING WAVEFORMS

tr

tf

CLOCK

90%

50%

10%

ANY

90%

50%

OUTPUT 10%

tw

1/fmax

tPLH tPHL

tTLH

tTHL

Figure 4.

VCC

GND

RESET

tPHL

ANY

OUTPUT

CLOCK

tw

50%

50%

trec

50%

Figure 5.

tr

ENABLE T

90%

50%

10%

tPLH

RIPPLE

CARRY

OUT

90%

50%

10%

tTLH

Figure 6.

tf

VCC

GND

tPHL

tTHL

RESET

tsu

CLOCK

50%

th

50%

Figure 7. HC163A Only

INPUTS

P0, P1,

P2, P3

LOAD

CLOCK

VALID

50%

tsu

th

50%

tsu

th

trec

50%

Figure 8.

VCC

GND

VCC

GND

VCC

GND

ENABLE T

OR

ENABLE P

CLOCK

VALID

50%

tsu

th

50%

Figure 9.

TEST CIRCUIT

TEST POINT

DEVICE

UNDER

TEST

OUTPUT

CL*

VCC

GND

VCC

GND

VCC

GND

VCC

GND

VCC

GND

*Includes all probe and jig capacitance

Figure 10.

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