The AT27C516 is a low-power, high-performance 524,288-bit one-time programmable read-only memory (OTP EPROM) organized 32K by 16 bits. It requires only one 5V power supply in normal read mode operation. Any word can be accessed in less than 45 ns, eliminating the need for speed reducing WAIT states. The by-16 organization make this part ideal for high-performance 16- and 32-bit microprocessor systems. In read mode, the AT27C516 typically consumes 15 mA. Standby mode supply cur- rent is typically less than 10 µA. The AT27C516 is available in industry-standard JEDEC-approved one-time program- mable (OTP) plastic PLCC and VSOP packages. The device features two-line control (CE, OE) to eliminate bus contention in high-speed systems. With 32K word storage capability, the AT27C516 allows firmware to be stored reliably and to be accessed by the system without the delays of mass storage media. Atmel’s AT27C516 have additional features to ensure high quality and efficient pro- duction use. The Rapid Programming Algorithm reduce programming time, while high reliability and low power consumption ensure reliable program storage and operation.