25AA1024-I/P

Memory IC Overview

The Microchip Technology 25AA1024-I/P is a 1-Mbit (128K x 8) serial EEPROM utilizing an SPI-compatible interface. It operates within a supply voltage range of 1.8V to 5.5V and supports clock frequencies up to 20 MHz. The device features a 256-byte page size, 1 million erase/write cycle endurance, and data retention exceeding 200 years. It includes sector write protection, deep power-down mode with 1 µA current consumption, and operates across the industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports byte, page, sector, and chip erase operations via self-timed cycles without requiring prior erasure for writes.
• Includes hardware write protection controlled by the WP pin and STATUS register bits, alongside software-based block protection.
• Features a HOLD input to pause serial communication without resetting the sequence, facilitating multi-device bus management.
• Provides electronic signature identification and deep power-down mode for low-power system applications.

Memory IC Applications

• Configuration storage in microcontroller systems
• Calibration parameter persistence
• Data logging and event recording
• Device identification and tracking

Memory IC Procurement Notes

Verify the specific suffix 'I' confirms the industrial temperature range (-40°C to +85°C). Confirm the '/P' designation corresponds to the 8-lead PDIP package. Ensure the source document matches DS20001836K for accurate electrical specifications. Check RoHS compliance status as indicated in official datasheets.

Memory IC Selection Notes

Select this component when SPI interface compatibility is required with 1-Mbit capacity. Consider the 256-byte page size for write efficiency. Evaluate the 1.8V minimum operating voltage for low-power designs. Verify that the industrial temperature range meets environmental requirements.

Memory IC Part Context

The 25AA1024 belongs to Microchip's 25AA series of serial EEPROMs. It shares architectural similarities with other devices in the family but offers higher density. The PDIP package variant provides through-hole mounting options suitable for prototyping and specific board layouts.

Memory IC Replacement Considerations

Cross-reference with 25LC1024 for similar SPI EEPROM functionality. Verify pinout compatibility and voltage ranges before substitution. Check if alternative packages like SOIJ or DFN are available for space-constrained designs.

Memory IC FAQ

Does the 25AA1024 require an erase cycle before writing new data?

No, the device supports direct byte and page writes without requiring prior erasure of the memory array.

How is the HOLD function utilized during serial communication?

The HOLD pin allows the host to pause transmission mid-sequence without resetting the address pointer, resuming operation upon deassertion.

What determines the write protection state of the memory array?

Write protection is determined by the Block Protect (BP0, BP1) bits in the STATUS register and the state of the WP pin, controlled by the WPEN bit.