74AC138 鈥?74ACT138 1-of-8 Decoder/Demultiplexer
November 1988
Revised August 2000
74AC138 鈥?74ACT138
1-of-8 Decoder/Demultiplexer
General Description
The AC/ACT138 is a high-speed 1-of-8 decoder/demulti-
plexer. 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 AC/ACT138 devices or a 1-of-32 decoder
using four AC/ACT138 devices and one inverter.
Features
s
I
CC
reduced by 50%
s
Demultiplexing capability
s
Multiple input enable for easy expansion
s
Active LOW mutually exclusive outputs
s
Outputs source/sink 24 mA
s
ACT138 has TTL-compatible inputs
Ordering Code:
Order Number
74AC138SC
74AC138SJ
74AC138MTC
74AC138PC
74ACT138SC
74ACT138SJ
74ACT138PC
Package Number
M16A
M16D
MTC16
N16E
M16A
M16D
N16E
Package Description
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Device also available in Tape and Reel. Specify by appending suffix letter 鈥淴鈥?to the ordering code.
Connection Diagram
Logic Symbols
IEEE/IEC
Pin Descriptions
Pin Names
A
0
鈥揂
2
E
1
鈥揈
2
E
3
O
0
鈥揙
7
Description
Address Inputs
Enable Inputs
Enable Input
Outputs
FACT錚?is a trademark of Fairchild Semiconductor Corporation.
漏 2000 Fairchild Semiconductor Corporation
DS009925
www.fairchildsemi.com