SN74AHCT139集成電路（IC）的信號(hào)開(kāi)關(guān)多路復(fù)用器解碼器規(guī)格書(shū)PDF中文資料

SN74AHCT139屬于集成電路（IC）的信號(hào)開(kāi)關(guān)多路復(fù)用器解碼器。由德州儀器制造生產(chǎn)的SN74AHCT139信號(hào)開(kāi)關(guān)，多路復(fù)用器，解碼器邏輯型信號(hào)開(kāi)關(guān)、多路復(fù)用器和編碼器 IC 可用于對(duì)以數(shù)字格式表示數(shù)據(jù)的電信號(hào)進(jìn)行路由和選擇。這些器件與設(shè)計(jì)用于模擬信號(hào)的類似產(chǎn)品有所不同，它們保留的信息表示為兩個(gè)電狀態(tài)之一，而不是兩個(gè)外部界限內(nèi)的無(wú)窮變化量。

1 Features

? AEC-Q100 qualified for automotive applications:

– Device temperature grade 1: -40°C to +125°C

– Device HBM ESD classification level 2

– Device CDM ESD classification level C4B

? Available in wettable flank QFN package

? Operating range 4.5V to 5.5V VCC

? TTL-Compatible inputs

? Low delay, 9.6ns max (VCC = 5V, CL = 50pF

? Latch-up performance exceeds 250mA

per JESD 17

2 Applications

? Drive an indicator LED

? Level-shift using open-drain outputs

? Control a relay

3 Description

The SN74AHCT139-Q1 contains two 2-line to 4-line

decoders/demultiplexers. These devices are designed

to be used in high-performance memory-decoding

or data-routing applications requiring very short

propagation delay times. In high-performance memory

systems, these decoders can be used to minimize

the effects of system decoding. When used with highspeed

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.