M54HC155 M74HC155 DUAL 2 TO 4 LINE DECODER 3 TO 8 LINE DECODER
The M54/74HC155 is a high speed CMOS DUAL 2- TO-4 LINE DECODER fabricated in silicon gate C2MOS technology.
It has the same high speed performance of LSTTL combined with true CMOS low power consumption. It features dual 1-TO-4 line demultiplexers with indi- vidual strobe inputs (1G and 2G), individual data in- puts (1C and 2C) and common binary address inputs (A and B).
When both decoders are enabled by the strobes, the inverted output of 1C data and non-inverted output of 2C data will be brought to the select output pins of each sections. A 1-TO-8 line demultiplexer can also be easily built up by providing a data signal to both 1C and 2C inputs ; the output order from the msb is 1Y3, 1Y2, 1Y1, 1Y0, 2Y3, 2Y2, 2Y1, 2Y0. This device can be used as a 2-to-4 line decoder or a 3-to-8 line decoder when 1C is held high and 2C is held low.
All inputs are equipped with protection circuits against static discharge and transient excess volt- age.