AT29C256-12JI

Memory IC Overview

The AT29C256-12JI is a 256K (32K x 8) five-volt-only Flash PEROM manufactured by Microchip Technology. It features a 120 ns access time and operates within an industrial temperature range of -40°C to +85°C. The device utilizes a 32-lead PLCC package and supports asynchronous parallel interfaces with hardware and software data protection mechanisms.

Memory IC Feature Summary

• Supports in-system reprogrammability using only 5V supply without high voltage requirements
• Provides page-based programming operations with internal address and data latches for 64-byte pages
• Includes hardware and software data protection features to prevent inadvertent writes
• Offers low-power consumption with CMOS standby current and active read capabilities

Memory IC Applications

• Industrial control systems requiring robust non-volatile storage
• Embedded applications needing in-system programmable memory
• Data logging devices operating in wide temperature environments

Memory IC Procurement Notes

Verify the specific ordering suffix to confirm the package type and temperature rating, as the base model number covers multiple variants. Confirm that the component meets all necessary environmental certifications for the intended deployment region. Check for any export control restrictions or compliance documentation required for procurement.

Memory IC Selection Notes

Select this component when a 256K capacity with 120 ns speed is required for industrial-grade applications. Ensure the design accommodates the 32-lead PLCC footprint and 5V logic levels. Consider the endurance specifications and protection features if frequent rewriting or data security is critical to the system architecture.

Memory IC Part Context

This part belongs to the AT29C256 series of Flash memory devices from Microchip Technology. The series offers various speed grades and packaging options to suit different commercial and industrial needs. The 'JI' suffix specifically denotes the industrial temperature range and PLCC package configuration.

Memory IC Replacement Considerations

AT29C256-70JI

Memory IC FAQ

How does the AT29C256-12JI handle data protection?

It provides both hardware protection via VCC sense and noise filters, and software protection requiring a specific command sequence to enable or disable writing.

What is the programming mechanism for this device?

Programming is performed on a page basis, where 64 bytes are loaded into internal latches and then simultaneously programmed using an internal timer.