AT29C256-12TI-T

Memory IC Overview

The AT29C256-12TI-T is a 256K (32K x 8) 5-volt-only Flash memory component manufactured by Microchip Technology. It features a 120 ns access time and operates within a commercial temperature range of 0°C to +70°C. The device utilizes a TSOP-28 surface-mount package and supports asynchronous parallel interfaces with an 8-bit data bus width. Electrical specifications include a maximum active current of 50 mA and a standby current of 300 µA, powered by a single 5V ± 10% supply.

Memory IC Feature Summary

• Supports in-system reprogrammability using only 5-volt power supplies without requiring high voltage generation circuits.
• Enables page-based programming operations where 64 bytes are loaded into internal latches for simultaneous erasure and programming.
• Integrates hardware and software mechanisms to prevent inadvertent program or erase cycles during operation.
• Provides data polling and toggle bit functions on specific output pins to indicate the completion status of program and erase cycles.

Memory IC Applications

• Storage of firmware code and configuration data in embedded systems
• Data retention applications requiring nonvolatile memory in industrial control units
• Code execution from memory in microcontroller-based architectures

Memory IC Procurement Notes

Verify that the ordering suffix 'T' corresponds to the tape-and-reel packaging format as specified in the manufacturer's documentation. Confirm the 'I' suffix indicates the industrial temperature rating if required, though datasheet tables list this variant under commercial ranges. Ensure compatibility with existing PCB footprints for the TSOP-28 package before procurement.

Memory IC Selection Notes

Select this component when a 5-volt-only interface is required for legacy system integration. The 120 ns speed suits moderate-frequency asynchronous buses. Consider the TSOP-28 form factor for space-constrained surface-mount designs. Evaluate endurance requirements against the typical 10,000 cycle limit per sector.

Memory IC Part Context

This part belongs to the AT29C256 series of 5-volt-only Flash memories originally developed by Atmel, now managed by Microchip Technology. The series offers various speed grades and package options including PLCC, PDIP, and TSOP. These devices are designed for applications needing straightforward parallel interface connectivity and single-supply operation.

Memory IC Replacement Considerations

Cross-reference with AT29C256-12TC for identical electrical characteristics in a different package type. Verify pinout compatibility when substituting between package families such as TSOP and PLCC.