The 74HC153 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). The 74HC153 have two identical 4-input multiplexers which select two bits of data from up to four
sources selected by common data select inputs (S0, S1). The two 4-input multiplexer circuits have individual
active LOW output enable inputs (1E, 2E) which can be used to strobe the outputs independently. The outputs
(1Y, 2Y) are forced LOW when the corresponding output enable inputs are HIGH. The 74HC153 is the logic implementation of a 2-pole, 4-position switch, where
the position of the switch is determined by the logic levels applied to S0 and S1.
The 74HC153 can be used to move data to a common output bus from a group
of registers. The state of the select inputs would determine the particular register from which the data came. An alternative application is a function
generator. The device can generate two functions or three variables. This is useful for implementing highly
irregular random logic. The 74HC153 is similar to the “253” but has standard outputs.
Separate enable for each output
Common select inputs
Permits multiplexing from n lines to
Enable line provided for cascading (n lines to 1 line)
Output capability: standard
ICC category: MSI
SOIC 16 package. Actual brand may vary from picture.