M74HC390 STMICROELECTRONICS [STMicroelectronics], M74HC390 Datasheet - Page 8

• Manufacturer Part Number: M74HC390
• Description: DUAL DECADE COUNTER
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

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