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PDF MC74AC138 Data sheet ( Hoja de datos )
| Número de pieza | MC74AC138 | |
| Descripción | 1-of-8 Decoder / Demultiplexer | |
| Fabricantes | ON Semiconductor | |
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MC74AC138, MC74ACT138
1-of-8
Decoder/Demultiplexer
The MC74AC138/74ACT138 is a high−speed 1−of−8
decoder/demultiplexer. This device is ideally suited for high−speed
bipolar memory chip select address decoding.
The multiple input enables allow parallel expansion to a 1−of−24
decoder using just three MC74AC138/74ACT138 devices or a
1−of−32 decoder using four MC74AC138/74ACT138 devices and one
inverter.
• Demultiplexing Capability
• Multiple Input Enable for Easy Expansion
• Active LOW Mutually Exclusive Outputs
• Outputs Source/Sink 24 mA
• ′ACT138 Has TTL Compatible Inputs
• These are Pb−Free Devices
VCC O0 O1 O2 O3 O4 O5 O6
16 15 14 13 12 11 10 9
123
A0 A1 A2
45
E1 E2
678
E3 O7 GND
Figure 1. Pinout: 16−Lead Packages Conductors
(Top View)
A0 A1 A2
E1 E2 E3
O0 O1 O2 O3 O4 O5 O6 O7
www.onsemi.com
16
1
16
1
MARKING
DIAGRAMS
16
SOIC−16
D SUFFIX
CASE 751B
1
xxx138G
AWLYWW
TSSOP−16
DT SUFFIX
CASE 948F
16
xxx
138
ALYWG
G
1
xxx = AC or ACT
A = Assembly Location
WL or L = Wafer Lot
Y = Year
WW or W = Work Week
G or G = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
Figure 2. Logic Symbol
PIN ASSIGNMENT
PIN FUNCTION
A0−A2
E1−E2
E3
O0−O7
Address Inputs
Enable Inputs
Enable Input
Outputs
© Semiconductor Components Industries, LLC, 2015
January, 2015 − Rev. 7
1
Publication Order Number:
MC74AC138/D
1 page  
MC74AC138, MC74ACT138
DC CHARACTERISTICS
74AC
74AC
Symbol
Parameter
VCC
(V)
TA = +25°C
TA =
−40°C to +85°C
Unit
Conditions
Typ Guaranteed Limits
VIH Minimum High Level
Input Voltage
3.0 1.5 2.1
4.5 2.25 3.15
5.5 2.75 3.85
2.1
3.15
3.85
VOUT = 0.1 V
V or VCC − 0.1 V
VIL Maximum Low Level
Input Voltage
3.0 1.5 0.9
4.5 2.25 1.35
5.5 2.75 1.65
0.9
1.35
1.65
VOUT = 0.1 V
V or VCC − 0.1 V
VOH Minimum High Level
Output Voltage
3.0 2.99 2.9
4.5 4.49 4.4
5.5 5.49 5.4
2.9
4.4
5.4
IOUT = −50 μA
V
3.0 − 2.56
4.5 − 3.86
5.5 − 4.86
2.46
3.76
4.76
*VIN = VIL or VIH
−12 mA
V IOH −24 mA
−24 mA
VOL Maximum Low Level
Output Voltage
3.0 0.002 0.1
4.5 0.001 0.1
5.5 0.001 0.1
0.1
0.1
0.1
IOUT = 50 μA
V
3.0 − 0.36
4.5 − 0.36
5.5 − 0.36
0.44
0.44
0.44
*VIN = VIL or VIH
V IOL
12 mA
24 mA
24 mA
IIN Maximum Input
Leakage Current
5.5 − ±0.1
±1.0
μA VI = VCC, GND
IOLD
IOHD
†Minimum Dynamic
Output Current
5.5 − −
5.5 − −
75
−75
mA VOLD = 1.65 V Max
mA VOHD = 3.85 V Min
ICC Maximum Quiescent
Supply Current
5.5 − 8.0
80
μA VIN = VCC or GND
*All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
NOTE: IIN and ICC @ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V VCC.
AC CHARACTERISTICS
74AC
74AC
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
Min Typ Max
TA = −40°C to +85°C
CL = 50 pF
Min Max
Unit
Fig.
No.
Propagation Delay
tPLH
An to On
Propagation Delay
tPHL
An to On
Propagation Delay
tPLH
E1 or E2 to On
Propagation Delay
tPHL
E1 or E2 to On
Propagation Delay
tPLH
E3 to On
Propagation Delay
tPHL
E3 to On
*Voltage Range 3.3 V is 3.3 V ±0.3 V.
*Voltage Range 5.0 V is 5.0 V ±0.5 V.
3.3 1.5 8.5 13.0
5.0 1.5 6.5 9.5
3.3 1.5 8.0 12.5
5.0 1.5 6.0 9.0
3.3 1.5 11.0 15.0
5.0 1.5 8.0 11.0
3.3 1.5 9.5 13.5
5.0 1.5 7.0 9.5
3.3 1.5 11.0 15.5
5.0 1.5 8.0 11.0
3.3 1.5 8.5 13.0
5.0 1.5 6.0 8.0
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.0
15.0
10.5 ns 3−6
14.0
10.5 ns 3−6
16.0
12.0 ns 3−6
15.0
10.5 ns 3−6
16.5
12.5 ns 3−6
14.0
9.5 ns 3−6
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| PDF Descargar | [ Datasheet MC74AC138.PDF ] | |
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