3 Description

The Microchip AT27C512R is a low-power, high-performance, 524,288-bit, One-Time Programmable, Read-Only memory (OTP EPROM) organized as 65,536 words of 8 bits each. 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.

The Microchip-scaled CMOS technology provides low active power consumption and fast programming. Power consumption is typically only 8 mA in Active mode and less than 10 μA in Standby mode.

The AT27C512R is available in a choice of industry-standard, JEDEC-approved, PDIP and PLCC packages. All devices feature two-line control (CE, OE) to give designers the flexibility to prevent bus contention.

With 64 Kbyte storage capability, the AT27C512R allows firmware to be stored reliably and to be accessed by the system without the delays of mass storage media.

The AT27C512R has additional features to ensure high-quality and efficient production use. The rapid programming algorithm reduces the time required to program the part and guarantees reliable programming. Programming time is typically only 100 μs/byte. The integrated product identification code electronically identifies the device and manufacturer. This feature is used by industry-standard programming equipment to select the proper programming algorithms and voltages.