CY74FCT138ATPC 데이터 시트보기 (PDF) - Cypress Semiconductor
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CY74FCT138ATPC Datasheet PDF : 6 Pages
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CY54/74FCT138T
Capacitance[6]
Parameter
CIN
COUT
Description
Input Capacitance
Output Capacitance
Typ.[5]
5
9
Max.
10
12
Unit
pF
pF
Power Supply Characteristics
Parameter
Description
Test Conditions
ICC
∆ICC
Quiescent Power Supply Current
Quiescent Power Supply Current
(TTL inputs)
VCC=Max., VIN<0.2V,
VIN > VCC–0.2V
VCC=Max., VIN=3.4V,[8]
f1=0, Outputs Open
ICCD
IC
Dynamic Power Supply
Current[9]
Total Power Supply Current[10]
VCC=Max., One Input Toggling,
50% Duty Cycle, Outputs Open,
VIN < 0.2V or VIN > VCC–0.2V
VCC=Max., f1=10 MHz,
50% Duty Cycle, Outputs Open, Toggle
E1, E2, or E3, One Output Toggling,
VIN < 0.2V or VIN > VCC–0.2V
VCC=Max., f1=10 MHz,
50% Duty Cycle, Outputs Open, Toggle
E1, E2, or E3, One Output Toggling,
VIN=3.4V or VIN=GND
Notes:
8. Per TTL driven input (VIN=3.4V); all other inputs at VCC or GND.
9. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
10. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC+∆ICCDHNT+ICCD(f0/2 + f1N1)
ICC = Quiescent Current with CMOS input levels
∆ICC = Power Supply Current for a TTL HIGH input (VIN=3.4V)
DH = Duty Cycle for TTL inputs HIGH
NT = Number of TTL inputs at DH
ICCD = Dynamic Current caused by an input transition pair (HLH or LHL)
f0 = Clock frequency for registered devices, otherwise zero
f1 = Input signal frequency
N1 = Number of inputs changing at f1
All currents are in milliamps and all frequencies are in megahertz.
Typ.[5]
0.1
0.5
0.06
0.7
1.0
Max.
0.2
Unit
mA
2.0
mA
0.12 mA/MHz
1.4
mA
2.4
mA
3
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