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Product Detailed Parameters
- Description：IC EEPROM 4KBIT SPI 10MHZ 8TSSOP
- 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：8-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：8-TSSOP
- Access Time：-
- Grade：-
- Qualification：-
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Overview
The Microchip Technology 25LC040AT-I/ST is a 4 Kbit (512 x 8) Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It operates within a supply voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 10 MHz. The device utilizes an SPI-compatible serial bus with SCK, SI, SO, CS, HOLD, and WP pins. It features self-timed erase and write cycles with a maximum duration of 5 ms. The component is housed in an 8-lead Rotated TSSOP package and is rated for industrial temperature operation from -40°C to +85°C.
Feature Summary
- Supports up to 16-byte page write operations for efficient data storage.
- Includes hardware write protection via the WP pin and software block protection settings.
- Features a Hold input to pause serial communication without resetting the sequence.
- Provides built-in power-on/off data protection circuitry.
Applications
- Microcontroller system configuration storage
- Calibration data retention
- Parameter logging in embedded systems
Procurement Notes
Verify that the ordering suffix 'I' corresponds to the Industrial temperature grade (-40°C to +85°C) and 'ST' indicates the Rotated TSSOP package. Confirm the 'A' designation aligns with the specific revision requirements for your design. Ensure the voltage supply matches the 2.5V minimum threshold specified for this variant.
Selection Notes
Select this part when a low-pin-count EEPROM is required for non-volatile data storage in space-constrained designs. The Rotated TSSOP package offers layout flexibility compared to standard orientations. Verify that the application environment remains within the specified industrial temperature limits and that the SPI interface timing meets the 10 MHz maximum requirement.
Part Context
This component belongs to the 25LC040A family of 4Kb SPI Serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 25AA040A but differs in its minimum operating voltage requirements. The family provides reliable non-volatile memory solutions for various embedded applications requiring moderate storage capacity.
Replacement Considerations
Direct substitutes include other variants within the 25LC040A family such as 25LC040AT-E/ST for extended temperature ranges or different packages like 25LC040AT-I/SN. Cross-family replacements require verification of voltage compatibility and pinout alignment.
