The AT27C256R is a low-power, high-performance 262,144-bit one-time programmable read-only memory (OTP EPROM) organized 32k x 8 bits. It requires only one 5V power supply in normal read mode operation. Any byte can be accessed in less than 45 ns, eliminating the need for speed reducing WAIT states on high-performance microprocessor systems.
Fast Read Access Time - 45 ns
Low-Power CMOS Operation (100 µA Max Standby, 20 mA Max Active at 5 MHz)
5V ± 10% Supply
High Reliability CMOS Technology (2,000V ESD Protection, 200 mA Latchup Immunity)