View mc74hc139 datasheet:

MOTOROLA SEMICONDUCTOR TECHNICAL DATA MC54/74HC139A Dual 1-of-4 Decoder/ Demultiplexer High–Performance Silicon–Gate CMOS J SUFFIX CERAMIC PACKAGE The MC54/74HC139A is identical in pinout to the LS139. The device 16 CASE 620–10 inputs are compatible with standard CMOS outputs; with pullup resistors, 1 they are compatible with LSTTL outputs. This device consists of two independent 1–of–4 decoders, each of which decodes a two–bit Address to one–of–four active–low outputs. Active–low N SUFFIX Selects are provided to facilitate the demultiplexing and cascading functions. PLASTIC PACKAGE 16 The demultiplexing function is accomplished by using the Address inputs to CASE 648–08 select the desired device output, and utilizing the Select as a data input. 1 • Output Drive Capa