The ’HC154 and ’HCT154 are 4-to-16 line decoders/demultiplexers with two enable inputs, E1 and E2. A High on either enable input forces the output into the High state. The demultiplexing function is performed by using the four input lines, A0 to A3, to select the output lines Y0 to Y15, and using one enable as the data input while holding the other enable low.
Feature
Two Enable Inputs to Facilitate Demultiplexing and Cascading Functions
Fanout (Over Temperature Range)
Wide Operating Temperature Range . . . –55°C to 125°C
Balanced Propagation Delay and Transition Times
Significant Power Reduction Compared to LSTTL Logic ICs
HC Types
HCT Types
4.5V to 5.5V Operation
Direct LSTTL Input Logic Compatibility, VIL = 0.8V (Max), VIH = 2V (Min)
CMOS Input Compatibility, Il1μA at VOL, VOH
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FPGA / CPLD
Memory内存
MOS / 晶体管
MCU / 单片机 
DSP / 处理器 
OCEP / 光耦 
二三级管 
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