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IDT54FCT138AP Datasheet PDF : 6 Pages
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IDT54/74FCT138/A/C
FAST CMOS 1-OF-8 DECODER-WITH ENABLE
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: VLC = 0.2V; VHC = VCC – 0.2V
Commercial: TA = 0°C to +70°C, VCC = 5.0V ± 5%; Military: TA = –55°C to +125°C, VCC = 5.0V ± 10%
Symbol
Parameter
Test Conditions(1)
Min. Typ.(2)
VIH
Input HIGH Level
Guaranteed Logic HIGH Level
2.0
—
VIL
Input LOW Level
Guaranteed Logic LOW Level
—
—
IIH
Input HIGH Current
VCC = Max.
VI = VCC
—
—
VI= 2.7V
—
—
IIL
Input LOW Current
VI= 0.5V
—
—
VI = GND
—
—
VIK
Clamp Diode Voltage
VCC = Min., IN = –18mA
IOS
Short Circuit Current
VCC = Max.(3), VO = GND
—
–0.7
–60
–120
VOH
Output HIGH Voltage
VCC = 3V, VIN = VLC or VHC, IOH = –32µA
VHC
VCC
VCC = Min.
IOH = –300µA
VHC
VCC
VIN = VIH or VIL
IOH = –12mA MIL.
2.4
4.3
IOH = –15mA COM’L. 2.4
4.3
VOL
Output LOW Voltage
VCC = 3V, VIN = VLC or VHC, IOL = 300µA
—
GND
VCC = Min.
IOL = 300µA
—
GND
VIN = VIH or VIL
IOL = 32mA MIL.
—
0.3
IOL = 48mA COM’L.
—
0.3
Max.
—
0.8
5
5(4)
–5(4)
–5
–1.2
—
—
—
—
—
VLC
VLC(4)
0.5
0.5
Unit
V
V
µA
V
mA
V
V
NOTES:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 5.0V, +25°C ambient and maximum loading.
3. Not more than one output should be shorted at one time. Duration of the short circuit test should not exceed one second.
4. This parameter is guaranteed but not tested.
2581 tbl 03
POWER SUPPLY CHARACTERISTICS
VLC = 0.2V; VHC = VCC – 0.2V
Symbol
Parameter
Test Conditions(1)
ICC
Quiescent Power Supply Current Vcc = Max.
VIN ≥ VHC; VIN ≤ VLC
∆ICC
ICCD
IC
Quiescent Power Supply Current
TTL Inputs HIGH
Dynamic Power Supply Current(4)
Total Power Supply Current(5)
Vcc = Max.
VIN = 3.4V(3)
Vcc = Max.
Outputs Open
One Output Toggling
50% Duty Cycle
Vcc = Max.
Outputs Open
Toggle E1, E2 or E3
VIN ≥ VHC
VIN ≤ VLC
VIN ≥ VHC
VIN ≤ VLC
(FCT)
50% Duty Cycle
fO = 10MHz
One Output Toggling
VIN = 3.4V
VIN = GND
Min.
—
Typ.(2)
0.2
—
0.5
—
0.15
—
1.7
—
2.0
Max.
1.5
2.0
0.3
4.5
5.5
NOTES:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 5.0V, +25°C ambient.
3. Per TTL driven input (VIN = 3.4V); all other inputs at VCC or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
5. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ∆ICC DHNT + ICCD (fCP/2 + fONO)
ICC = Quiescent Current
∆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 Output Transition Pair (HLH or LHL)
fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
fO = Output Frequency
NO = Number of Outputs at fO
All currents are in milliamps and all frequencies are in megahertz.
Unit
mA
mA
mA/MHz
mA
2581 tbl 04
7.3
3
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