25LC040X-I/ST Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip 25LC040X-I/ST is a 4 Kbit (512 x 8) SPI serial EEPROM operating from 2.5 V with a 2 MHz maximum clock frequency, 1 million write/erase cycle endurance, and 200-year minimum data retention in a TSSOP-8 package. It features a rotation-pin address select for multi-device bus sharing. Ideal for configuration storage, calibration data, and non-volatile parameter retention in microcontroller-based designs.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 25LC040X-I/ST Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5935(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of 25LC040X-I/ST?
- 4 Kbit (512 x 8) SPI EEPROM with 2.5 V low-voltage operation
- Up to 2 MHz SPI clock for fast data access in microcontroller systems
- 1,000,000 write/erase cycle endurance for reliable long-term use
- 200-year minimum data retention ensuring non-volatile storage integrity
- Rotation address pin for cascading multiple devices on a single SPI bus
- TSSOP-8 package offering compact footprint for space-constrained PCBs
What is 25LC040X-I/ST used for?
The 25LC040X-I/ST is used in microcontroller-based systems requiring reliable non-volatile storage of configuration parameters, calibration coefficients, and user settings, such as industrial sensor modules, home appliance controllers, and medical diagnostic equipment. Its 2 MHz SPI interface and 1 million write endurance make it well suited for applications with frequent configuration updates and long product lifetimes.
What are the specifications of 25LC040X-I/ST?
| Pbfree Code | Yes |
| Manufacturer Package Code | TSSOP-8 |
| Factory Lead Time | 6Weeks |
| Date Of Intro | 1997-06-01 |
| YTEOL | 3 |
| Clock Frequency-Max (fCLK) | 2MHz |
| Data Retention Time-Min | 200 |
| Endurance | 1000000 Write/Erase Cycles |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Memory Density | 4096bit |
| Memory IC Type | EEPROM |
| Memory Width | 8 |
| Number of Functions | 1 |
| Number of Ports | 1 |
| Number of Words | 512words |
| Number of Words Code | 512 |
| Operating Mode | SYNCHRONOUS |
| Organization | 512X8 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Parallel/Serial | SERIAL |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Serial Bus Type | SPI |
| Standby Current-Max | 0.000005A |
| Supply Current-Max | 0.005mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2.5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Write Cycle Time-Max (tWC) | 5ms |
| Write Protection | HARDWARE |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.32.00.51 |
| Country of Origin | Malaysia, Philippines, Thailand |
Where can I find the 25LC040X-I/ST datasheet?
25LC040X-I/ST Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for 25LC040X-I/ST?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the 25LC040X-I/ST rotation address pin enable multi-device configurations on a shared SPI bus?
The rotation address pin on the 25LC040X-I/ST allows each device on a shared SPI bus to occupy a unique 8-bit address space, enabling up to 8 devices to be connected without requiring individual chip-select lines for each one. This simplifies wiring and reduces GPIO usage on the host microcontroller in systems where multiple small EEPROMs are needed for different data partitions.
What is the write endurance and data retention rating of the 25LC040X-I/ST for demanding applications?
The 25LC040X-I/ST is rated for 1,000,000 write/erase cycles per byte, providing reliable endurance for applications that frequently update calibration values or log operational counts. Its minimum data retention time is 200 years, ensuring that stored configuration data remains valid throughout the product's entire service life even without periodic refresh.
At what SPI clock frequency does the 25LC040X-I/ST operate and how does this affect read throughput?
The 25LC040X-I/ST supports a maximum SPI clock frequency of 2 MHz. At 2 MHz with 8-bit transfers, it delivers approximately 250 kBytes per second of raw read throughput, which is more than adequate for reading a 512-byte configuration block during a microcontroller startup sequence in under 2 ms.
How should procurement teams assess the supply risk for 25LC040X-I/ST given its YTEOL of 3 years?
With a YTEOL of 3 years, the 25LC040X-I/ST has limited production lifetime remaining. Microchip's factory lead time is 6 weeks, so buyers with designs using this part should evaluate a drop-in alternative from Microchip's active 25AA040 or 25AA040A family, which shares the same TSSOP-8 footprint and SPI protocol while offering extended supply continuity.
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About Microchip
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More from Microchip
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $2.4110 | $2.41 |
| 11+ | $1.4466 | $15.91 |
| 25+ | $0.7100 | $17.75 |
| 100+ | $0.6800 | $68.00 |
| 1000+ | $0.6500 | $650.00 |
| 2000+ | $0.5935 | $1186.94 |
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