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Product Detailed Parameters
- Description：IC EEPROM 4KBIT SPI SOT23-6
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- Memory Type：Non-Volatile
- Memory Format：EEPROM
- Technology：EEPROM
- Memory Size：4Kbit
- Memory Organization：512 x 8
- Memory Interface：SPI
- Clock Frequency：10 MHz
- Write Cycle Time - Word, Page：5ms
- Voltage - Supply：2.5V ~ 5.5V
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：SOT-23-6
- Supplier Device Package：SOT-23-6
- Access Time：-
- Grade：-
- Qualification：-
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Overview
The Microchip Technology 25LC040AT-I/OT is a 4 Kbit (512 x 8) Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It utilizes a Serial Peripheral Interface (SPI) compatible bus for data access, supporting clock frequencies up to 10 MHz. The device operates within a supply voltage range of 2.5V to 5.5V and is housed in a 6-lead SOT-23 package. It features industrial temperature ratings from -40°C to +85°C.
Feature Summary
- Supports sequential read operations and page write modes with self-timed erase and write cycles.
- Includes built-in hardware write protection via the WP pin and software block protection for array segments.
- Features a HOLD input to pause serial communication without resetting the sequence.
Applications
- Microcontroller-based systems requiring non-volatile parameter storage
- Low-power sensor nodes needing data retention after power loss
- Industrial control devices storing configuration settings
Procurement Notes
Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm that the voltage range requirements align with the LC series specifications rather than the AA series. Ensure compatibility with the host SPI controller's voltage levels before integration.
Selection Notes
Select this component when an SPI interface is preferred over I2C for simpler timing or higher speed requirements. The 25LC040A is suitable for applications operating at 2.5V or higher, distinguishing it from the 1.8V-compatible 25AA040A variant. Consider the SOT-23 package for compact surface-mount designs.
Part Context
This part belongs to the 25XX040A family of 4 Kbit serial EEPROMs manufactured by Microchip Technology. The 'LC' designation indicates a 2.5V minimum operating voltage, while 'I' denotes the industrial temperature range. The 'OT' suffix specifies the 6-lead SOT-23 package format.
Replacement Considerations
The 25LC040AT-E/SN serves as a direct replacement if an automotive temperature grade (-40°C to +125°C) is required instead of the industrial grade. Other packages such as SOIC or TSSOP may be used if form factor changes are acceptable.
