M54HC690 データシートの表示（PDF） - STMicroelectronics

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M54HC690

HC691/693 4 BIT BINARY COUNTER/REGISTER (3-STATE) HC690/692 DECADE COUNTER/REGISTER (3-STATE)

STMicroelectronics 

M54/M74HC690/691/692/693

SWITCHING CHARACTERISTICS (continued)

tPLZ, tPZL

The 1 kΩ load resistors should be connected be-

tween outputs and VCC line and the 50 pF load ca-

pacitors should be connected between outputs

and GND line. All inputs except G input should be

connected to VCC line or GND line such that out-

puts will be in low logic level while G input is held

low.

tPHZ, tPZH

The 1 kΩ load resistors and the 50 pF load capa-

citors should be connected between each output

and GND line.

All inputs except G input should be connected to

VCC or GND line such that output will be in high

logic level while G input is held low.

18/23

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