The AT28C256-35PC is a high-performance 256K (32K x 8) Parallel EEPROM, crafted by the renowned Microchip Technology. This EEPROM offers fast read access times of up to 35 nanoseconds with no waiting period required, making it an ideal choice for high-speed microprocessor systems. Its versatile design allows it to be used in a wide range of applications, from personal computers to industrial control systems, and more.

The AT28C256-35PC boasts a robust feature set that includes full static operation, which eliminates the need for external clocking. Its inherent data retention capabilities are rated at 100 years, ensuring the longevity and durability of the data stored. Additionally, the EEPROM supports 100,000 write cycles, providing reliable and repeated data storage without degradation.

This EEPROM operates within a voltage range of 4.5V to 5.5V, making it compatible with many standard digital systems. It is also designed with hardware and software data protection schemes to prevent inadvertent writes, thus safeguarding the integrity of the data. Moreover, the AT28C256-35PC features an automatic write cycle timer and write complete interrupt for efficient programming operations.

The device comes in a power-saving CMOS technology and has a low-power standby mode, which is particularly beneficial for battery-powered devices where energy efficiency is paramount. Its parallel interface ensures easy integration with most microcontrollers and microprocessors.

Supplied in a 28-pin, 0.600" wide, plastic DIP package, the AT28C256-35PC is designed for simple insertion into standard sockets, which facilitates easy device swapping and upgrades. Its commercial temperature range of 0°C to 70°C allows for operation in most environmental conditions without the need for additional cooling solutions.

Overall, the Microchip Technology AT28C256-35PC is a reliable, high-speed EEPROM that offers excellent performance and durability for a multitude of applications where data integrity and device longevity are critical.