MC74HC589A(2000) Просмотр технического описания (PDF) - ON Semiconductor

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MC74HC589A
(Rev.:2000)

8-Bit Serial or Parallel-Input/Serial-Output Shift Register with 3-State Output

ON Semiconductor 

MC74HC589A

SWITCHING WAVEFORMS

tr

tf

LATCH CLOCK

90%

50%

10%

tw

VCC

1/fmax

tw

GND

SHIFT CLOCK

50%

VCC

GND

tPLH

tPHL

QH

90%

50%

10%

tTLH

tTHL

tPLH

tPHL

QH 50%

Figure 1. (Serial Shift/Parallel Load = L)

Figure 2. (Serial Shift/Parallel Load = H)

OUTPUT

ENABLE

QH

QH

50%

tPZL tPLZ

50%

tPZH tPHZ

50%

VCC

GND

HIGH

IMPEDANCE

10% VOL

90% VOH

HIGH

IMPEDANCE

SERIAL SHIFT/

PARALLEL LOAD

QH

tw

50%

tPLH

50%

VCC

50%

GND

tPHL

Figure 3.

Figure 4.

A–H

LATCH CLOCK

DATA VALID

50%

tsu

th

50%

Figure 5.

SERIAL SHIFT/

PARALLEL LOAD

SHIFT CLOCK

50%

tsu

50%

Figure 7.

DATA VALID

VCC

VCC

SA

50%

GND

GND

tsu

th

SHIFT CLOCK

50%

Figure 6.

TEST POINT

VCC

OUTPUT

DEVICE

GND

UNDER

TEST

CL*

http://onsemi.com

6

*Includes all probe and jig capacitance

Figure 8. Test Circuit

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