SN74AHC139-Q1中文資料德州儀器數(shù)據(jù)手冊(cè)PDF規(guī)格書

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 2V to 5.5V VCC

? Low delay, 10.5ns max (VCC = 5V, CL = 50pF)

? Latch-up performance exceeds 250mA

per JESD 17

2 Applications

? Memory device selection with shared data bus

? Reduce required number of outputs for chip select

applications

? Route data

3 Description

The SN74AHC139-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.