25LC010AT-I/MS

Overview

The Microchip Technology 25LC010AT-I/MS is a 1 Kbit Serial Electrically Erasable Programmable Read-Only Memory (EEPROM) housed in an 8-lead MSOP package. It operates within a supply voltage range of 2.5V to 5.5V and supports an industrial temperature range from -40°C to +85°C. The device features a maximum clock frequency of 10 MHz at higher voltages, utilizing a standard SPI-compatible serial bus for communication. It offers 128 x 8-bit organization with write page mode capabilities up to 16 bytes. Key electrical characteristics include a standby current of 5 µA and read/write currents of 5 mA at 5.5V. Endurance is rated for 1,000,000 erase/write cycles with data retention exceeding 200 years.

Feature Summary

• Supports Serial Peripheral Interface (SPI) compatible communication with separate data input and output lines.
• Includes hardware write protection via the WP pin and software block protection for array segments.
• Features built-in power-on/off data protection circuitry and a write enable latch mechanism.
• Allows suspension of serial transmission via the HOLD pin without resetting the sequence.

Applications

• Data storage for configuration parameters in microcontroller systems
• Non-volatile memory for storing calibration constants
• Device identification and tracking information storage

Procurement Notes

Verify that the ordering suffix 'I' corresponds to the Industrial temperature grade (-40°C to +85°C) and 'MS' indicates the 8-lead MSOP package. Confirm the 'T' suffix aligns with specific tape-and-reel or packaging requirements if applicable, as datasheet details on suffix variations are limited. Ensure compatibility with the 2.5V to 5.5V operating voltage range required by this specific variant.

Selection Notes

Select this component when a 1 Kbit EEPROM with SPI interface is required for industrial environments. It is suitable for applications needing moderate endurance and long data retention. Consider the MSOP package size constraints and the 2.5V minimum supply voltage requirement. Verify that the system logic levels match the VCC-dependent input/output specifications.

Part Context

This part belongs to the 25XX010A family of 1 Kbit Serial EEPROMs from Microchip Technology. The family includes variants like the 25AA010A, which differs primarily in the lower supply voltage support starting at 1.8V. The 25LC010A series is designed for general-purpose non-volatile storage where low power consumption and high reliability are prioritized over ultra-low voltage operation.

Replacement Considerations

The 25AA010A is a functional substitute within the same family, offering identical memory architecture and pinout but supporting a wider voltage range down to 1.8V. Ensure the replacement part matches the required temperature grade and package type. Other 1 Kbit SPI EEPROMs may require firmware adjustments due to differing instruction sets or timing parameters.

FAQ

How does the HOLD pin function during serial communication?

The HOLD pin allows the host to pause serial communication without resetting the sequence. When pulled low while SCK is low, the SI, SCK, and SO pins enter a high-impedance state, ignoring transitions until HOLD is released.

What happens if a page write crosses a physical page boundary?

If a page write attempts to cross a physical page boundary, the data wraps around to the beginning of the current page, overwriting existing data instead of proceeding to the next page.

How is the write enable latch managed?

The write enable latch must be set using the WREN instruction before any write operation. It is automatically reset after power-up, execution of WRDI, successful completion of a write cycle, or when the WP pin is brought low.