74HCT157集成電路（IC）的信號開關多路復用器解碼器規(guī)格書PDF中文資料

74HCT157屬于集成電路（IC）的信號開關多路復用器解碼器。由安森美半導體公司制造生產(chǎn)的74HCT157信號開關，多路復用器，解碼器邏輯型信號開關、多路復用器和編碼器 IC 可用于對以數(shù)字格式表示數(shù)據(jù)的電信號進行路由和選擇。這些器件與設計用于模擬信號的類似產(chǎn)品有所不同，它們保留的信息表示為兩個電狀態(tài)之一，而不是兩個外部界限內(nèi)的無窮變化量。

The 74HCT157 is identical in pinout to the LS157. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs.

This device routes 2 nibbles (A or B) to a single port (Y) as determined by the Select input. The data is presented at the outputs in noninverted form. A high level on the Output Enable input sets all four Y outputs to a low level.

Features

? Output Drive Capability: 10 LSTTL Loads

? TTL/NMOS?Compatible Input Levels

? Outputs Directly Interface to CMOS, NMOS, and TTL

? Operating Voltage Range: 4.5 to 5.5 V

? Low Input Current: 1.0 A

? High Noise Immunity Characteristic of CMOS Devices

? In Compliance with the Requirements Defined by JEDEC Standard No. 7A

? ESD Performance: HBM  2000 V; Machine Model  200 V

? Chip Complexity: 82 FETs or 20.5 Equivalent Gates

? These are Pb?Free Devices