These data selectors/multiplexers contain inverters and
drivers to supply full on-chip data selection to the four output gates. A separate strobe input is provided. A 4-bit word is selected from one of two sources and is routed to the four outputs. The 74ALS157 presents true data.
Switching specifications at 50 pF
Switching specifications guaranteed over full temperature and VCC range
Advanced oxide-isolated, ion-implanted Schottky TTL process
Functionally and pin for pin compatible with Schottky and low power Schottky TTL counterpart
Improved AC performance over Schottky and low power Schottky counterparts
Expand any data input point
Multiplex dual data buses
General four functions of two variables (one variable is common)
Source programmable counters
SOIC 16 package. Actual brand may vary from picture.