MC74AC138DG Datasheet, PDF (1/11 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
w These devices are available in Pb−free package(s). Specifications herein
apply to both standard and Pb−free devices. Please see our website at
www.onsemi.com for specific Pb−free orderable part numbers, or
contact your local ON Semiconductor sales office or representative.
V_CC O₀ O₁ O₂ O₃ O₄ O₅ O₆
16 15 14 13 12 11 10 9
12345678
A₀ A₁ A₂ E₁ E₂ 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
Figure 2. Logic Symbol
PIN ASSIGNMENT
PIN
FUNCTION
A₀−A₂
E₁−E₂
E₃
O₀−O₇
Address Inputs
Enable Inputs
Enable Input
Outputs
http://onsemi.com
16
1
16
1
16
1
DIP−16
N SUFFIX
CASE 648
SO−16
D SUFFIX
CASE 751B
TSSOP−16
DT SUFFIX
CASE 948F
16
1
EIAJ−16
M SUFFIX
CASE 966
ORDERING INFORMATION
Device
Package
Shipping
MC74AC138N
PDIP−16 25 Units/Rail
MC74ACT138N
PDIP−16 25 Units/Rail
MC74AC138D
SOIC−16 48 Units/Rail
MC74ACT138D
SOIC−16 48 Units/Rail
MC74AC138DR2 SOIC−16 2500 Tape & Reel
MC74ACT138DR2 SOIC−16 2500 Tape & Reel
MC74AC138DT TSSOP−16 96 Units/Rail
MC74ACT138DT TSSOP−16 96 Units/Rail
MC74AC138DTR2 TSSOP−16 2500 Tape & Reel
MC74ACT138DTR2 TSSOP−16 2500 Tape & Reel
MC74AC138M
EIAJ−16 50 Units/Rail
MC74ACT138M
EIAJ−16 50 Units/Rail
MC74AC138MEL EIAJ−16 2000 Tape & Reel
MC74ACT138MEL EIAJ−16 2000 Tape & Reel
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 6 of this data sheet.
© Semiconductor Components Industries, LLC, 2006
1
March, 2006 − Rev. 6
Publication Order Number:
MC74AC138/D