View mc74hc154 datasheet:

MOTOROLA SEMICONDUCTOR TECHNICAL DATA MC54/74HC154 1-of-16 Decoder/Demultiplexer High–Performance Silicon–Gate CMOS The MC54/74HC154 is identical in pinout to the LS154. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are J SUFFIX compatible with LSTTL outputs. CERAMIC PACKAGE 24 This device, when enabled, selects one of 16 active–low outputs. Two CASE 758–02 1 active–low Chip Selects are provided to facilitate the chip–select, demulti- plexing, and cascading functions. When either Chip Select is high, all outputs are high. The demultiplexing function is accomplished by using the Address inputs to select the desired device output. Then, while holding one chip select input low, data can be applied to the other chip select input (see