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74VHCT138A Datasheet(PDF) 3 Page - Fairchild Semiconductor

Part No. 74VHCT138A
Description  3-to-8 Decoder/Demultiplexer
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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www.fairchildsemi.com
Absolute Maximum Ratings(Note 1)
Recommended Operating
Conditions (Note 5)
Note 1: Absolute Maximum Ratings are values beyond which the device
may be damaged or have its useful life impaired. The databook specifica-
tions should be met, without exception, to ensure that the system design is
reliable over its power supply, temperature, and output/input loading vari-
ables. Fairchild does not recommend operation outside databook specifica-
tions.
Note 2: VCC = 0V.
Note 3: HIGH or LOW state. IOUT absolute maximum rating must be
observed.
Note 4: VOUT <GND, VOUT> VCC (Outputs Active).
Note 5: Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
AC Electrical Characteristics
Note 6: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load. Average
operating current can be obtained by the equation: ICC (opr.) = CPD * VCC * fIN + ICC.
Supply Voltage (VCC)
−0.5V to +7.0V
DC Input Voltage (VIN)
−0.5V to +7.0V
DC Output Voltage (VOUT)
(Note 2)
−0.5V to 7.0V
(Note 3)
−0.5V to V
CC+ 0.5V
Input Diode Current (IIK)
−20 mA
Output Diode Current (IOK)
(Note 4)
±20 mA
DC Output Current (IOUT)
±25 mA
DC VCC/GND Current (ICC)
±75 mA
Storage Temperature (TSTG)
−65°C to +150°C
Lead Temperature (TL)
(Soldering, 10 seconds)
260
°C
Supply Voltage (VCC)
4.5V to
+5.5V
Input Voltage (VIN)0V to +5.5V
Output Voltage (VOUT)
(Note 3)
0V to VCC
(Note 2)
0V to 5.5V
Operating Temperature (TOPR)
−40°C to +85°C
Input Rise and Fall Time (tr, tf)
VCC = 5.0V ± 0.5V
0
∼ 20 ns/V
Symbol
Parameter
VCC
(V)
TA = 25°CTA = −40°C to +85°C
Units
Conditions
Min
Typ
Max
Min
Max
VIH
HIGH Level Input Voltage
4.5
− 5.5
2.0
2.0
V
VIL
LOW Level Input Voltage
4.5
− 5.5
0.8
0.8
V
VOH
HIGH Level
4.5
4.4
4.5
4.4
V
VIN = VIH IOH = −50 µA
Output Voltage
4.5
3.94
3.80
or VIL IOH = −8 mA
VOL
LOW Level
4.5
0.0
0.1
0.1
V
VIN = VIH IOL = 50 µA
Output Voltage
4.5
0.36
0.44
or VIL IOL = 8 mA
IIN
Input Leakage Current
0
− 5.5
±0.1
±1.0
µAV
IN = 5.5V or GND
ICC
Quiescent Supply Current
5.5
4.0
20.0
µAV
IN = VCC or GND
ICCT
Maximum ICC/Input
5.5
1.35
1.50
mA
Vin = 3.4V
other inputs
= V
CC or GND
IOFF
Output Leakage Current
0
0.5
5.0
µAV
OUT = 5.5V
Symbol
Parameter
VCC
(V)
TA = 25°CTA = −40°C to +85°C
Units
Conditions
Min
Typ
Max
Min
Max
tPLH
Propagation Delay
5.0
± 0.5
7.6
10.4
1.0
12.0
ns
CL = 15 pF
tPHL
An to On
8.111.41.0
13.0
CL = 50 pF
tPLH
Propagation Delay
5.0
± 0.5
6.6
9.1
1.0
10.5
ns
CL = 15 pF
tPHL
E3 to On
7.1
10.1
1.0
11.5
CL = 50 pF
tPLH
Propagation Delay
5.0
± 0.5
7.0
9.6
1.0
11.0
ns
CL = 15 pF
tPHL
E1 or E2 to On
7.5
10.6
1.0
12.0
CL = 50 pF
CIN
Input Capacitance
4
10
10
pF
VCC = Open
CPD
Power Dissipation Capacitance
49
pF
(Note 6)




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