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CD54AC138 Datasheet(PDF) 6 Page - Texas Instruments

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Part No. CD54AC138
Description  3-to-8-Line Decoders/Demultiplexers
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo TI - Texas Instruments

CD54AC138 Datasheet(HTML) 6 Page - Texas Instruments

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6
Propagation Delay,
E3 to Output
(CD74AC/ACT238)
tPLH, tPHL
5
3.5
-
12.4
3.4
-
13.6
ns
Input Capacitance
CI
-
-
-10-
-10
pF
Power Dissipation Capacitance
CPD
(Note 13)
-
-
110
-
-
110
-
pF
NOTES:
10. Limits tested at 100%.
11. 3.3V Min at 3.6V, Max at 3V.
12. 5V Min at 5.5V, Max at 4.5V.
13. CPD is used to determine the dynamic power consumption per package.
AC: PD = VCC
2 f
i (CPD + CL)
ACT: PD = VCC
2 f
i (CPD + CL) + VCC ∆ICC where fi = input frequency, CL = output load capacitance, VCC = supply voltage.
Switching Specifications Input tr, tf = 3ns, CL = 50pF (Worst Case) (Continued)
PARAMETER
SYMBOL
VCC (V)
-40oC TO 85oC
-55oC TO 125oC
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
FIGURE 1. PROPAGATION DELAY TIMES
FIGURE 2. PROPAGATION DELAY TIMES
tr = 3ns
tf = 3ns
90%
VS
10%
GND
INPUT
138 OUTPUT
tPHL
tPLH
238 OUTPUT
tPLH
tPHL
VS
VS
E1, E2
tr = 3ns
tf = 3ns
90%
VS
GND
INPUT
138 OUTPUT
tPHL
tPLH
238 OUTPUT
tPLH
tPHL
VS
VS
E3
DUT
OUTPUT
RL (NOTE)
OUTPUT
LOAD
500
CL
50pF
NOTE: For AC Series Only: When VCC = 1.5V, RL = 1kΩ.
FIGURE 3. PROPAGATION DELAY TIMES
AC
ACT
Input Level
VCC
3V
Input Switching Voltage, VS
0.5 VCC
1.5V
Output Switching Voltage, VS
0.5 VCC
0.5 VCC
CD54/74AC138, CD54/74ACT138, CD74AC238, CD74ACT238


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