TEXAS INSTRUMENTS TMS27C020 262144 BY 8-BIT UV ERASABLE TMS27PC020 262144 BY 8-BIT PROGRAMMABLE READ-ONLY MEMORIES handbook(1)
TMS27C020 is a 262144 by 8-bit UV erasable EPROM, and TMS27PC020 is a one-time programmable EPROM. They feature high-speed programming, low power consumption, and compatibility with existing megabit EPROMs.
