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M74HCT643 Datasheet(PDF) 6 Page - STMicroelectronics

Part # M74HCT643
Description  OCTAL BUS TRANSCEIVER3-STATE: HCT245 NON INVERTING HCT640 INVERTING, HCT643 INVERTING/NON INVERTING
PDF  11 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M74HCT643 Datasheet(HTML) 6 Page - STMicroelectronics

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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.)
f IN xVCC
In determining the value of CPD, a relatively
high frequency of 1 MHz was applied to fIN,in
orther to eliminate any error caused by the
quiescent supply current.
M54/M74HCT245/640/643
6/11



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