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

? Wide operating range of 1.5V to 6V

? Inputs accept voltages up to 6V

? Continuous ±24mA output drive at 5V

? Supports up to ±75mA output drive at 5V

in short bursts

? Drives 50Ω transmission lines

? Maximum tpd of 9.5ns at 5V, 50pF load

2 Applications

? Memory device selection with shared data bus

? Reduce required number of outputs for chip select

applications

? Route data

3 Description

The SN74AC139-Q1 contains two two-to-four

decoders with one active low output strobe (G). When

the outputs of one channel are gated by the strobe

input (G = HIGH), they are all forced into the high

state. When the outputs are not disabled by the strobe

input (G = LOW), only the selected output is low while

all others are high.