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MC74AC138DR2G Datasheet, PDF (1/11 Pages) ON Semiconductor – Decoder/Demultiplexer | |||
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MC74AC138, MC74ACT138
1âofâ8
Decoder/Demultiplexer
The MC74AC138/74ACT138 is a highâspeed 1âofâ8
decoder/demultiplexer. This device is ideally suited for highâspeed
bipolar memory chip select address decoding.
The multiple input enables allow parallel expansion to a 1âofâ24
decoder using just three MC74AC138/74ACT138 devices or a
1âofâ32 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
⢠â²ACT138 Has TTL Compatible Inputs
w These devices are available in Pbâfree package(s). Specifications herein
apply to both standard and Pbâfree devices. Please see our website at
www.onsemi.com for specific Pbâfree orderable part numbers, or
contact your local ON Semiconductor sales office or representative.
VCC 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: 16âLead 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
A0âA2
E1âE2
E3
O0âO7
Address Inputs
Enable Inputs
Enable Input
Outputs
http://onsemi.com
16
1
16
1
16
1
DIPâ16
N SUFFIX
CASE 648
SOâ16
D SUFFIX
CASE 751B
TSSOPâ16
DT SUFFIX
CASE 948F
16
1
EIAJâ16
M SUFFIX
CASE 966
ORDERING INFORMATION
Device
Package
Shipping
MC74AC138N
PDIPâ16 25 Units/Rail
MC74ACT138N
PDIPâ16 25 Units/Rail
MC74AC138D
SOICâ16 48 Units/Rail
MC74ACT138D
SOICâ16 48 Units/Rail
MC74AC138DR2 SOICâ16 2500 Tape & Reel
MC74ACT138DR2 SOICâ16 2500 Tape & Reel
MC74AC138DT TSSOPâ16 96 Units/Rail
MC74ACT138DT TSSOPâ16 96 Units/Rail
MC74AC138DTR2 TSSOPâ16 2500 Tape & Reel
MC74ACT138DTR2 TSSOPâ16 2500 Tape & Reel
MC74AC138M
EIAJâ16 50 Units/Rail
MC74ACT138M
EIAJâ16 50 Units/Rail
MC74AC138MEL EIAJâ16 2000 Tape & Reel
MC74ACT138MEL EIAJâ16 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 â Rev. 6
Publication Order Number:
MC74AC138/D
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