AT27BV256-90JC

Memory IC Overview

The AT27BV256-90JC is a 256K-bit (32K x 8) one-time programmable read-only memory manufactured by Microchip Technology. It features a 90 ns access time and operates within dual voltage ranges: 2.7V to 3.6V or standard 5V ±10%. The device utilizes a 32-lead plastic J-Leaded Chip Carrier (PLCC) package. Key electrical specifications include a maximum active current of 8 mA at 5 MHz for the 3.6V range, with standby currents typically below 1 µA. It supports Rapid programming algorithms and includes integrated product identification codes.

Memory IC Feature Summary

• Dual voltage operation supporting both unregulated battery power supplies and standard regulated systems
• Pin-compatible design with JEDEC standard AT27C256R for simplified system upgrades
• Low power CMOS technology ensuring extended battery life in portable applications
• Integrated product identification code for automated programming equipment compatibility

Memory IC Applications

• Fast portable systems requiring low power consumption
• Battery-powered devices utilizing unregulated power supplies
• Systems requiring pin-compatible replacements for standard 5V OTP EPROMs
• Industrial control units operating in commercial or industrial temperature ranges

Memory IC Procurement Notes

Verify that the specific ordering suffix corresponds to the required package type and temperature grade. Confirm export compliance requirements as this product may require additional documentation for shipment from the United States. Ensure programming equipment supports the Rapid programming algorithm and appropriate voltage levels for OTP verification.

Memory IC Selection Notes

Select this component when a 256K-bit non-volatile memory solution is needed with flexibility for both 3V and 5V logic environments. The PLCC package is suitable for surface mount applications requiring robust mechanical stability. Consider the 90 ns speed rating against system timing requirements and verify that the single-supply programming capability aligns with available test infrastructure.

Memory IC Part Context

This part belongs to the AT27BV256 series of high-performance, low-power OTP EPROMs. It is designed to rival 5V parts in speed while maintaining low power consumption typical of 3V supplies. The series offers various speed grades and package options to accommodate different system constraints and form factors.

Memory IC Replacement Considerations

The AT27BV256-90JC is pin-compatible with the JEDEC standard AT27C256R. Verify that replacement sources maintain the same voltage tolerance and access time specifications to ensure functional equivalence in existing designs.