M74HC390 STMICROELECTRONICS [STMicroelectronics], M74HC390 Datasheet - Page 8
M74HC390
Manufacturer Part Number
M74HC390
Description
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Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.M74HC390.pdf
(13 pages)
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M54/M74HC390
TEST CIRCUIT I
SWITCHING CHARACTERISTICS TEST WAVEFORM
8/13
WHEN THE OUTPUTS DRIVE CAPACITIVE LOAD, TOTAL CURRENT CONSUMPTION IS TO BE A SUM OF THE VALUE CALCULATED
FROM C
Ca – Cd ARE THE CAPACITANCE AT QA QD OUTPUT.
I
CC
= f
CK
PD
.
AND I
V
CC
.
Ca
2
CC
OBTAINED FROM THE FOLLOWING FORMULA.
CC
f
CK
2
(Opr.)
.
V
CC
.
2 Cb
5
Cc
5
Cd
5