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74HC620 数据表(PDF) 6 Page - STMicroelectronics

部件名 74HC620
功能描述  OCTAL BUS TRANSCEIVER HC620 3 STATE INVERTING HC623 3 STATE NON INVERTING
PDF  11 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

74HC620 数据表(HTML) 6 Page - STMicroelectronics

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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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