25LC020AT-I/ST

Overview

The Microchip Technology 25LC020AT-I/ST is a 2 Kbit (256 x 8-bit) Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It operates via a SPI-compatible serial bus with a maximum clock frequency of 10 MHz. The device supports a supply voltage range of 2.5 V to 5.5 V and features low-power CMOS technology, including a standby current of 5 µA at 5.5 V. It offers high reliability with an endurance of 1,000,000 erase/write cycles and data retention exceeding 200 years. The component includes self-timed erase and write cycles with a maximum duration of 5 ms.

Feature Summary

• Supports sequential read operations and page write mode for up to 16 bytes within the same physical page boundary.
• Includes built-in hardware write protection mechanisms such as a power-on/off data protection circuitry, write enable latch, and dedicated write-protect pin.
• Features a Hold input that allows suspension of serial communication without resetting the sequence, facilitating higher priority interrupt servicing.

Applications

• Storage of device unique identification numbers and production batch codes
• Retention of calibration parameters and user configuration settings
• Logging of operational status or fault records in embedded systems

Procurement Notes

Verify the specific suffix 'I/ST' against official datasheets to confirm Industrial temperature grade (-40°C to +85°C) and TSSOP-8 package type. Ensure the ordering code matches the required voltage range of 2.5V to 5.5V. Confirm RoHS compliance and Pb-free status through manufacturer documentation prior to procurement.

Selection Notes

Select this component when a small non-volatile memory capacity is required for storing configuration data or logs. It is suitable for applications utilizing standard SPI interfaces on microcontrollers. Consider the 25LC020A variant specifically over the 25AA020A if the system design requires a minimum operating voltage of 2.5 V rather than 1.8 V.

Part Context

This part belongs to the 25XX020A family of 2 Kbit SPI EEPROMs manufactured by Microchip Technology. The 'LC' designation indicates a 2.5 V to 5.5 V operating voltage range, distinguishing it from the 'AA' series which supports lower voltages down to 1.8 V. The 'I' suffix denotes the Industrial temperature range, while 'ST' specifies the 8-lead Thin Shrink Small Outline Package (TSSOP).

Replacement Considerations

The 25LC020A-I/ST serves as a direct functional replacement for other 25LC020A variants sharing the same industrial temperature rating and TSSOP-8 package. Verify voltage compatibility before substituting with 25AA020A models due to differing minimum supply voltage requirements.