54F251A
8-Input Multiplexer (National Semiconductor)
54F253
Dual 4-Input Multiplexer (National Semiconductor)
54F253
Dual 1-of-4 Data Selector/Multiplexers (Texas Instruments)
54F257
Quadruple 2-Line To 1-Line Data Selectors/Multiplexers (Texas Instruments)
54F257A
Quad 2-Input Multiplexer (National Semiconductor)
54F20
Dual 4-Input NAND Gate (National Semiconductor)
54F20
DUAL 4-INPUT POSITIVE-NAND GATES (Texas Instruments)
54F219
64-Bit Random Access Memory (National Semiconductor)
54F2244
Octal Buffer/Line Driver (National Semiconductor)
54F240
Octal Buffers/Line Drivers (National Semiconductor)