SN74HCT138

更新时间： 2024-11-19 23:03:15

品牌	Logo	应用领域
德州仪器 - TI		解码器解复用器
页数	文件大小	规格书
6页	97K
描述
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS

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数据手册
替代型号

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SN74HCT138 数据手册

SN54HCT138, SN74HCT138

3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS

SCLS171C – MARCH 1984 – REVISED MAY 1997

SN54HCT138 . . . J OR W PACKAGE

SN74HCT138 . . . D, N, OR PW PACKAGE

(TOP VIEW)

Inputs Are TTL-Voltage Compatible

Designed Specifically for High-Speed

Memory Decoders and Data Transmission

Systems

Incorporate Three Enable Inputs to Simplify

Cascading and/or Data Reception

G2A

G2B

Package Options Include Plastic

Small-Outline (D), Thin Shrink

Small-Outline (PW), and Ceramic Flat (W)

Packages, Ceramic Chip Carriers (FK), and

Standard Plastic (N) and Ceramic (J)

300-mil DIPs

12 Y3

GND

SN54HCT138 . . . FK PACKAGE

(TOP VIEW)

description

The ’HCT138 are designed for high-performance

memory-decoding or data-routing applications

requiring very short propagation delay times. In

high-performance memory systems, these

decoders can minimize the effects of system

decoding. When employed with high-speed

memories utilizing a fast enable circuit, the delay

timesofthesedecodersandtheenabletimeofthe

memory are usually less than the typical access

time of the memory. This means that the effective

system delay introduced by the decoders is

negligible.

20 19

G2A

15 Y3

9 10 11 12 13

G2B

NC – No internal connection

The conditions at the binary-select inputs and the three enable inputs select one of eight output lines. Two

active-low (G) and one active-high (G) 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 SN54HCT138 is characterized for operation over the full military temperature range of –55°C to 125°C. The

SN74HCT138 is characterized for operation from –40°C to 85°C.

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

12 3 4 5 6

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SN74HCT138 替代型号

型号	品牌	替代类型	描述	数据表
SN54HCT138	TI	功能相似	3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS

与SN74HCT138相关器件

型号	品牌	获取价格	描述	数据表
SN74HCT138D	TI	获取价格	3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SN74HCT138D-00	TI	获取价格	HCT SERIES, OTHER DECODER/DRIVER, INVERTED OUTPUT, PDSO16
SN74HCT138DE4	TI	获取价格	3-LINE TO 8-LINE DECODERS DEMULTIPLEXERS
SN74HCT138DG4	TI	获取价格	3-LINE TO 8-LINE DECODERS DEMULTIPLEXERS
SN74HCT138DR	TI	获取价格	3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SN74HCT138DR-00	TI	获取价格	HCT SERIES, OTHER DECODER/DRIVER, INVERTED OUTPUT, PDSO16
SN74HCT138DRE4	TI	获取价格	3-LINE TO 8-LINE DECODERS DEMULTIPLEXERS
SN74HCT138DRG4	TI	获取价格	3-LINE TO 8-LINE DECODERS DEMULTIPLEXERS
SN74HCT138DT	TI	获取价格	3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SN74HCT138DTE4	TI	获取价格	3-LINE TO 8-LINE DECODERS DEMULTIPLEXERS

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