AT49BV4096A-12TC

Memory IC Overview

The AT49BV4096A-12TC is a 4-megabit (512K x 8 or 256K x 16) CMOS Flash memory manufactured by Microchip Technology. It operates on a single 2.7V to 3.6V supply and features a fast read access time of 120 ns. The device utilizes a sector architecture comprising one boot block, two parameter blocks, and a main memory array. It supports byte-by-byte or word-by-word programming with typical times of 30 µs and sector erase cycles of 10 seconds. The component is housed in a 48-lead Plastic Thin Small Outline Package (TSOP).

Memory IC Feature Summary

• Sector-based architecture with dedicated boot block protection for secure code storage.
• Internal control logic manages erase and program operations without external clocks.
• Hardware data protection mechanisms prevent inadvertent writes during low voltage conditions.
• Supports DATA polling and toggle bit methods for detecting end-of-cycle status.

Memory IC Applications

• In-system reprogrammable firmware storage for embedded systems.
• Secure boot code retention using the lockout feature.
• Data logging applications requiring nonvolatile storage.
• Industrial control systems needing reliable sector-level updates.

Memory IC Procurement Notes

Verify the specific suffix 'TC' corresponds to the 48-lead TSOP package and commercial temperature range as documented in the ordering information. Confirm that the design utilizes the correct pin configuration for the A-1 address input in byte mode versus word mode. Ensure power supply stability within the 2.7V to 3.6V range to maintain specified access times and current consumption limits.

Memory IC Selection Notes

Select this component when a parallel interface flash memory with hardware write protection is required. The availability of distinct parameter blocks allows for structured data management separate from application code. Consider the 120 ns access speed for system timing requirements. The optional VPP pin provides flexibility for faster programming if supported by the host controller circuitry.

Memory IC Part Context

This part belongs to the AT49BV/LV004/4096A family of 3-volt Flash memories. It shares architectural similarities with the AT49BV004 but offers double the density. The 'A' designation indicates the bottom-boot variant, while 'T' variants offer top-boot configurations. The device represents an evolution of earlier Atmel flash technologies now managed under Microchip Technology.

Memory IC Replacement Considerations

Direct substitutes include the AT49BV4096AT-12TC for top-boot functionality and the AT49BV004A series for lower density requirements. Verify pin compatibility and sector size differences when replacing with other flash families. Cross-reference command sequences if migrating between different manufacturer architectures.