MC74AC138_15 Datasheet, PDF (1/10 Pages) ON Semiconductor – 1-of-8 Decoder/Demultiplexer

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
V_CC 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
1
January, 2015 − Rev. 7
Publication Order Number:
MC74AC138/D