74LCX257FT集成電路（IC）的信號開關(guān)多路復(fù)用器解碼器規(guī)格書PDF中文資料

Functional Description

? Low-Voltage Quad 2-Channel Multiplexer (3-state) with 5-V Tolerant Inputs and Outputs

General

The 74LCX257FT is a high-performance CMOS multiplexer. Designed for use in 3.3 V systems, it achieves highspeed

operation while maintaining the CMOS low-power dissipation.

The device is designed for low-voltage (3.3 V) VCC applications, but it could be used to interface to 5 V supply

environment for inputs.

It is composed of four independent 2-channel multiplexers with common select and OE .

If OE is set high, the outputs are held in a high-impedance state. When SELECT is set low, A data inputs are

enabled. Conversely, when SELECT is high, B data inputs are enabled.

All inputs are equipped with protection circuits against static discharge.

Features

(1) AEC-Q100 (Rev. H) (Note 1)

(2) Wide operating temperature range: Topr = -40 to 125 

(3) Low-voltage operation: VCC = 1.65 to 3.6 V

(4) High-speed operation: tpd = 7.0 ns (max) (VCC = 3.3 ± 0.3 V)

(5) Output current: |IOH|/IOL = 24 mA (min) (VCC = 3.0 V)

(6) Power-down protection provided on all inputs and outputs

(7) Pin and function compatible with the 74 series

(74LVC/ALVC/ etc.) 257 type