CD54ACT138_08 Datasheet, PDF (1/16 Pages) Texas Instruments – 3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS

CD54ACT138, CD74ACT138
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
D Inputs Are TTL-Voltage Compatible
D Speed of Bipolar F, AS, and S, With
Significantly Reduced Power Consumption
D Designed Specifically for High-Speed
Memory Decoders and Data-Transmission
Systems
D Incorporate Three Enable Inputs to Simplify
Cascading and/or Data Reception
D Balanced Propagation Delays
D ±24-mA Output Drive Current
– Fanout to 15 F Devices
D SCR-Latchup-Resistant CMOS Process and
Circuit Design
D Exceeds 2-kV ESD Protection Per
MIL-STD-883, Method 3015
SCHS329A – JANUARY 2003 – REVISED FEBRUARY 2003
CD54ACT138 . . . F PACKAGE
CD74ACT138 . . . E OR M PACKAGE
(TOP VIEW)
A1
B2
C3
G2A ⁴
G2B ⁵
G1 ⁶
Y7 ⁷
GND ⁸
16 V_CC
15 Y0
14 Y1
13 Y2
12 Y3
11 _Y4
10 _Y5
9 _Y6
description/ordering information
The ’ACT138 decoders/demultiplexers are designed for high-performance memory-decoding and data-routing
applications that require very short propagation-delay times. In high-performance memory systems, these
decoders can be used to minimize the effects of system decoding. When employed with high-speed memories
utilizing a fast enable circuit, the delay times of these decoders and the enable time of the memory usually are
less than the typical access time of the memory. This means that the effective system delay introduced by the
decoders is negligible.
The conditions at the binary-select inputs and the three enable inputs select one of eight output lines. Two
active-low and one active-high enable inputs reduce the need for external gates or inverters when expanding.
A 24-line decoder can be implemented without external inverters, and a 32-line decoder requires only one
inverter. An enable input can be used as a data input for demultiplexing applications (see Application
Information).
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP – E
Tube
CD74ACT138E
CD74ACT138E
–55°C to 125°C SOIC – M
Tube
CD74ACT138M
Tape and reel CD74ACT138M96
ACT138M
CDIP – F
Tube
CD54ACT138F3A
CD54ACT138F3A
† _{Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines}
are available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright  2003, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
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