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| 74ACT257_01 Datasheet, PDF (5/11 Pages) STMicroelectronics – QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | |||
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74ACT257
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
5
pF
COUT
Output
Capacitance
5.0
8
pF
CPD Power Dissipation
Capacitance (note 5.0
fIN = 10MHz
25
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
TEST
tPLH, tPHL
tPZL, tPLZ
tPZH, tPHZ
CL = 50pF or equivalent (includes jig and probe capacitance)
RL = R1 = 500⦠or equivalent
RT = ZOUT of pulse generator (typically 50â¦)
SWITCH
Open
2VCC
Open
5/11
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