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| 74ACT161_01 Datasheet, PDF (7/13 Pages) STMicroelectronics – SYNCHRONOUS PRESETTABLE 4-BIT COUNTER | |||
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74ACT161
CAPACITIVE CHARACTERISTICS
Test Condition
Value
Symbol
Parameter
VCC
(V)
TA = 25°C
-40 to 85°C -55 to 125°C Unit
Min. Typ. Max. Min. Max. Min. Max.
CIN Input Capacitance 5.0
4
pF
CPD Power Dissipation
Capacitance (note 5.0
fIN = 10MHz
35
pF
1)
1) CPD is defined as the value of the ICâs internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/n (per circuit)
TEST CIRCUIT
CL = 50pF or equivalent (includes jig and probe capacitance)
RL = R1 = 500⦠or equivalent
RT = ZOUT of pulse generator (typically 50â¦)
WAVEFORM 1: PROPAGATION DELAYS, COUNT MODE (f=1MHz; 50% duty cycle)
7/13
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