AT49BV002NT-90JC

Memory IC Overview

The AT49BV002NT-90JC is a 2-megabit (256K x 8) parallel NOR Flash memory manufactured by Microchip Technology. It operates on a single supply voltage of 2.7V to 3.6V and features a 90ns access time. The device utilizes a sector architecture comprising one 16K-byte boot block, two 8K-byte parameter blocks, and two main memory blocks. It supports byte-by-byte programming with typical hardware data protection and DATA polling for end-of-program detection.

Memory IC Feature Summary

• Sector-based erase architecture with dedicated boot block
• Internal program control and timer mechanisms
• Hardware data protection against inadvertent writes
• DATA polling and toggle bit status monitoring

Memory IC Applications

• In-system reprogrammable code storage
• Secure boot code implementation
• Parameter data retention
• General-purpose nonvolatile memory

Memory IC Procurement Notes

Verify the specific suffix 'JC' corresponds to the 32-lead PLCC package and commercial temperature range as defined in the official ordering guide. Confirm that the manufacturer designation matches current Microchip Technology records following the acquisition of Atmel. Ensure compatibility with system voltage requirements before integration.

Memory IC Selection Notes

Select this component when a 2Mbit capacity with parallel interface is required. The 90ns speed grade suits moderate-speed applications. Consider the boot block lockout feature if secure code execution is necessary. Verify package availability as older revisions may have different pin configurations or lead materials.

Memory IC Part Context

This part belongs to the AT49BV/LV002 family of 3-volt Flash memories originally developed by Atmel. The 'N' indicates the presence of a RESET pin, while 'T' denotes the TSOP package variant. The 'J' specifies the PLCC package type. This series provides a transition from older EPROM technologies to modern flash solutions.

Memory IC FAQ

How is the boot block programming lockout detected?

Enter software product identification mode and read address 00000H. If I/O0 is high, the lockout is active; if low, it is inactive.

What is the function of the RESET pin?

A logic low on the RESET pin halts operations and places outputs in a high-impedance state. Applying 12V overrides boot block lockout during erase/program cycles.