M54HC620M1R datasheet(6/11 Pages) STMICROELECTRONICS

Part #	M54HC620M1R

Description	OCTAL BUS TRANSCEIVER HC620 3 STATE INVERTING HC623 3 STATE NON INVERTING

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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6 / 11 page

SWITCHING CHARACTERISTICS TEST WAVEFORM

VCC

GND

TEST CIRCUIT ICC (Opr.)

CPD CALCULATION

CPD is to be calculated with the following formula

by using the measured value of ICC (Opr.) in the

test circuit opposite.

CPD =

ICC

(Opr.)

fIN xVCC

In determining the typical value of CPD, a rela-

tively high frequency of 1 MHz was applied to fIN,

in order to eliminate any error caused by the

quiescent supply current.

INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF

SWITCHING CHARACTERISTICS TEST.

M54/M74HC620/623

6/11

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