MC74VHCT138A Datasheet, PDF (4/6 Pages) ON Semiconductor – 3-to-8 Line Decoder

MC74VHCT138A
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{AC ELECTRICAL CHARACTERISTICS (Input tr = tf = 3.0ns)}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _Symbol
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _tPLH,
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ tPHL
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ tPLH,
tPHL
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _tPLH,
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _tPHL
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _Cin
Parameter
Maximum Propagation Delay,
A to Y
Maximum Propagation Delay,
E3 to Y
Maximum Propagation Delay,
E2 or E1 to Y
Maximum Input Capacitance
Test Conditions
VCC = 5.0 ± 0.5V
VCC = 5.0 ± 0.5V
VCC = 5.0 ± 0.5V
CL = 15pF
CL = 50pF
CL = 15pF
CL = 50pF
CL = 15pF
CL = 50pF
TA = 25°C
Min
Typ
Max
7.6
10.4
8.1
11.4
6.6
9.1
7.1
10.1
7.0
9.6
7.5
10.6
4
10
TA = – 40 to 85°C
Min
Max Unit
1.0
12.0 ns
1.0
13.0
1.0
10.5 ns
1.0
11.5
1.0
11.0
ns
1.0
12.0
10
pF
Typical @ 25°C, VCC = 5.0V
CPD Power Dissipation Capacitance (Note NO TAG)
49
pF
1. 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. CPD is used to determine the no–load dynamic
power consumption; PD = CPD  VCC2  fin + ICC  VCC.
SWITCHING WAVEFORMS
A
tPLH
Y
VALID
1.5V
1.5V
VALID
3V
GND
tPHL
VOH
VOL
Figure 1.
E3
tPHL
Y
1.5V
1.5V
Figure 2.
3V
GND
tPLH
VOH
VOL
E2 or E1
Y
1.5V
tPHL
1.5V
Figure 3.
3V
GND
tPLH
VOH
VOL
MOTOROLA
TEST CIRCUIT
TEST POINT
OUTPUT
DEVICE
UNDER
TEST
CL*
* Includes all probe and jig capacitance
Figure 4. Test Circuit
4
VHC Data – Advanced CMOS Logic
DL203 — Rev 1