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參數(shù)資料
| 型號： | SN74ALS138 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS |
| 中文描述： | 3線至8線解碼器/解復(fù)用器 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 525K |
| 代理商： | SN74ALS138 |
SN54ALS138A, SN54AS138, SN74ALS138A, SN74AS138
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SDAS055E – APRIL 1982 – REVISED JULY 1996
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Designed Specifically for High-Speed
Memory Decoders and Data Transmission
Systems
Incorporate Three Enable Inputs to Simplify
Cascading and/or Data Reception
Package Options Include Plastic
Small-Outline (D) Packages, Ceramic Chip
Carriers (FK), and Standard Plastic (N) and
Ceramic (J) 300-mil DIPs
description
The
′
ALS138A and
′
AS138 are 3-line to 8-line
decoders/demultiplexers designed for high-
performance memory-decoding or data-routing
applications requiring very short propagation
delay times. In high-performance systems, these
devices can be used to minimize the effects of
system
decoding.
When
high-speed memories with a fast enable circuit,
the delay times of the decoder and the enable time
of the memory are usually less than the typical
access time of the memory. The effective system
delay introduced by the Schottky-clamped system
decoder is negligible.
employed
with
The conditions at the binary-select (A, B, and C)
inputs and the three enable (G1, G2A, and G2B)
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.
The SN54ALS138A and SN54AS138 are characterized for operation over the full military temperature range
of –55
°
C to 125
°
C. The SN74ALS138A and SN74AS138 are characterized for operation from 0
°
C to 70
°
C.
Copyright
1996, Texas Instruments Incorporated
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.
SN54ALS138A, SN54AS138 . . . J PACKAGE
SN74ALS138A, SN74AS138 . . . D OR N PACKAGE
(TOP VIEW)
3
2
1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
Y1
Y2
NC
Y3
Y4
C
G2A
NC
G2B
G1
SN54ALS138A, SN54AS138 . . . FK PACKAGE
(TOP VIEW)
B
A
N
Y
Y
Y
Y
G
N
NC – No internal connection
V
C
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
A
B
C
G2A
G2B
G1
Y7
GND
V
CC
Y0
Y1
Y2
Y3
Y4
Y5
Y6
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.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SN54ALS169BFK | SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTERS |
| SN54AS169AFK | SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTERS |
| SN74AS169AD | Hex Schmitt Inverter, Pb-Free; Package: SOIC 14 LEAD; No of Pins: 14; Container: Tape and Reel; Qty per Container: 2500 |
| SN54ALS193AFK | IGBT Driver IC; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):Yes RoHS Compliant: Yes |
| SN54ALS244B | OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SN74ALS138AD | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 3 to 8 RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| SN74ALS138AD | 制造商:Texas Instruments 功能描述:SEMICONDUCTORSLOGIC |
| SN74ALS138ADB | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
| SN74ALS138ADBR | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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