74ALS157
DESCRIPTION
The 74ALS157 is a quad 2-input multiplexer which selects 4 bits of data from one of two sources under the control of a mon 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 mon output bus is a typical use of the 74ALS157. The state of the select input determines the particular register from which data es. The device is the logic implementation of 4-pole, 2-position switch where the position of the switch is determined by the logic levels supplied to the select input. The 74ALS158 is similar but has inverting outputs (Yn). TYPE 74ALS157 74ALS158
74ALS157/74ALS158
TYPICAL PROPAGATION DELAY 6.0ns 6.0ns
TYPICAL SUPPLY CURRENT (TOTAL) 6m A 6m A
ORDERING INFORMATION
ORDER CODE DESCRIPTION
MERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C 74ALS157N, 74ALS158N 74ALS157D, 74ALS158D DRAWING NUMBER
16-pin plastic DIP 16-pin plastic...
