AT27BV1024 is a high-performance, low-power, low-voltage 1,048,576-bit one-time programmable read-only memory (OTP EPROM) organized as 64K by 16 bits. It requires only one supply in the range of 2.7V to 3.6V in normal read mode operation. The by-16 organization makes this part ideal for portable and handheld 16- and 32-bit microprocessor based systems using either regulated or unregulated battery power. Atmel’s innovative design techniques provide fast speeds that rival 5V parts while keeping the low power consumption of a 3V supply. At VCC = 2.7V, any word can be accessed in less than 120 ns. With a typical power dissipation of only 18 mW at 5MHz and VCC = 3V, the AT27BV1024 consumes less than one fifth the power of a standard 5V EPROM. Standby mode supply current is less than 1µA.