25LC1024-E/SM16KVAO

Overview

The Microchip Technology 25LC1024-E/SM16KVAO is a 1-Mbit (131,072-byte) serial EEPROM utilizing an SPI-compatible interface. It supports a maximum clock frequency of 20 MHz at VCC voltages between 4.5V and 5.5V, and 10 MHz at 2.5V to 5.5V. The device operates within a supply voltage range of 2.5V to 5.5V and features an extended industrial temperature range from -40°C to +125°C. It includes sector write protection, deep power-down current of 1 µA, and high endurance of 1 million erase/write cycles with data retention exceeding 200 years.

Feature Summary

• Supports byte and page-level write operations with a maximum page size of 256 bytes and self-timed write cycles up to 6 ms.
• Features hardware write protection via the WP pin and software block protection for none, 1/4, 1/2, or all of the memory array.
• Includes a HOLD pin to suspend serial communication without resetting the sequence, allowing host interruption handling.
• Complies with AEC-Q100 automotive standards and offers ESD protection greater than 4000V.

Applications

• Automotive electronic systems requiring AEC-Q100 qualified non-volatile storage
• Industrial control applications operating in extended temperature environments
• Embedded systems needing persistent configuration parameter storage

Procurement Notes

Verify that the specific suffix '16KVAO' corresponds to the requested reel quantity and tape-and-reel packaging format as defined by Microchip's official documentation. Confirm the 'E' designation matches the required extended temperature range (-40°C to +125°C). Ensure the SOIJ package type aligns with your PCB footprint requirements before finalizing orders.

Selection Notes

Select this component when an SPI interface is preferred over I2C for higher throughput in 8-pin surface-mount designs. The extended temperature grade ('E') is necessary for environments exceeding standard industrial limits. Verify that the system voltage remains within the 2.5V to 5.5V range to ensure proper operation of the internal high-voltage generator and logic levels.

Part Context

This part belongs to the 25LC1024 series of 1-Mbit SPI Serial EEPROMs manufactured by Microchip Technology. The series provides non-volatile memory solutions with varying temperature grades and package options, including SOIJ, PDIP, and DFN-S. The 'E' suffix specifically denotes the extended industrial temperature capability, distinguishing it from the standard industrial 'I' grade variant.

Replacement Considerations

The 25LC1024-I/SM serves as the standard industrial temperature alternative. Cross-reference with other 1-Mbit SPI EEPROMs only if pin compatibility and instruction set alignment are verified against the official datasheet specifications.

FAQ

How does the HOLD pin function during serial communication?

The HOLD pin allows the host to pause serial communication mid-sequence without resetting the address pointer. It must be pulled low while SCK is low to pause, and brought high while SCK is low to resume.

What is the difference between Page Erase and Sector Erase?

Page Erase clears a single 256-byte page, while Sector Erase clears a larger 32-Kbyte sector. Both require a prior Write Enable (WREN) command and initiate a self-timed cycle.

Can the device be written to if the WP pin is grounded?

If the WPEN bit in the STATUS register is set high, grounding the WP pin disables writes to the memory array but allows writes to the STATUS register. If WPEN is low, the WP pin function is ignored.