AT25256B-MAPDGV-T

Memory IC Overview

The AT25256B-MAPDGV-T is a 256 Kbit (32,768 x 8) Serial Electrically Erasable and Programmable Read-Only Memory (EEPROM) from Microchip Technology. It operates via a SPI-compatible interface supporting Modes 0 and 3 with a maximum clock rate of 5 MHz at 5V. The device supports low-voltage operation ranging from 1.7V to 5.5V and medium-voltage operation from 2.5V to 5.5V. It features automotive-grade qualification under AEC-Q100 standards, offering extended temperature ranges up to +125°C for Grade 1 and +85°C for Grade 3. Key performance metrics include 1,000,000 write cycle endurance and 100-year data retention.

Memory IC Feature Summary

• Supports SPI Modes 0 and 3 for synchronous serial communication
• Includes hardware and software write protection mechanisms
• Features self-timed write cycles within 5 ms maximum
• Provides block write protection for quarter, half, or entire array

Memory IC Applications

• Automotive electronic systems requiring high reliability
• Industrial applications demanding extended temperature operation
• Commercial devices utilizing low-power EEPROM storage

Memory IC Procurement Notes

Verify the specific package type and voltage grade corresponding to the MAPDGV suffix against official datasheets before procurement. Confirm that the required operating temperature range aligns with either Automotive Grade 1 or Grade 3 specifications. Ensure system power supply voltages remain within the specified limits for the selected grade to maintain functional integrity and compliance with AEC-Q100 standards.

Memory IC Selection Notes

Select this component when an SPI-compatible non-volatile memory solution is required for automotive or industrial environments. Consider the AT25256B series if space-saving packages such as UDFN are necessary. Evaluate the voltage requirements carefully, as Grade 1 and Grade 3 variants support different minimum supply voltages. Ensure the application benefits from the high endurance and long data retention characteristics provided by the EEPROM technology.

Memory IC Part Context

This part belongs to the AT25128B/AT25256B family of serial EEPROMs designed for robust performance in harsh environments. The series is optimized for applications where low power consumption and wide voltage operation are critical. It complements other Microchip memory solutions by providing reliable data storage with flexible write protection options and standard SPI interface compatibility.

Memory IC Replacement Considerations

Direct replacements within the same family include the AT25128B for reduced capacity needs. Verify pinout compatibility and voltage grade alignment when substituting between Grade 1 and Grade 3 variants. Consult official substitution lists for any updated packaging or minor parameter revisions.