SN54HC257, SN54HC258, SN74HC257, SN74HC258 QUADRUP.
Texas Instruments
SNJ54HC257J - QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS
SN54HC257, SN54HC258, SN74HC257, SN74HC258 QUADRUPLE 2ĆLINE TO 1ĆLINE DATA SELECTORS/MULTIPLEXERS WITH 3ĆSTATE OUTPUTS SCLS224B − DECEMBER 1982 − REVI.
