AT27C256R-45RU

The AT27C256R-45RU is a low-power, high-performance 262,144-bit one-time programmable read-only memory (OTP EPROM) organized as 32K by 8 bits. It requires a single 5V power supply for normal read operation, with any byte accessible in less than 45 ns, eliminating the need for wait states in high-performance microprocessor systems.

This EPROM utilizes Atmel's scaled CMOS technology for low-active power consumption and fast programming. Power consumption is typically 8 mA in Active Mode and less than 10 μA in Standby. It offers a fast read access time of 45 ns and supports a supply voltage range of 4.5V to 5.5V.

The device is available in a 28-SOIC package, suitable for surface mounting. It features CMOS and TTL compatible inputs and outputs, along with high reliability CMOS technology including 2,000V ESD Protection and 200 mA Latchup Immunity. The Rapid™ Programming Algorithm allows for programming in approximately 100 µs/byte.

Key features include integrated product identification code, commercial, industrial, and automotive temperature ranges, and two-line control (CE, OE) for flexibility and bus contention prevention. This makes the AT27C256R-45RU suitable for firmware storage in various embedded systems.