74AC139

The 7400 series of chips perform transistor-transistor logic. The 74AC139 is a " high-speed, dual 1-of-4 decoder/demultiplexer". It appears on SNES PCBs with flash memory chips.

74AC139

Chip type: 74AC139

Part #: 74AC139

Manufacturer: Toshiba

Date format: YYWW x

Variables: Date code