Data selectors/multiplexers 74F157A, 74F158A
74F157A: Quad 2-input data selector/multiplexer, non-inverting
74F158A: Quad 2-input data selector/multiplexer, inverting
DESCRIPTION
The 74F157A is a high speed Quad 2-Input Multiplexer which
selects 4 bits of data from one of two sources under the control of a
common Select input (S). The Enable input (E) is active when Low.
When E is High, all of the outputs (Yn) are forced Low regardless of
all other input conditions.
Moving data from two registers to a common output bus is a
common use of the 74F157A. The state of the Select input
determines the particular register from which the data comes.
The device is the logic implementation of a 4-pole, 2-position switch
where the position of the switch is determined by the logic levels
supplied to the Select input.
The 74F158A is similar, but has inverting outputs (Yn).
• Industrial temperature range (–10°C to +85°C) available for
74F157A
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