25LC256-E/MF Microchip Integrated Circuit (Small Outline No-lead) In Stock
25LC256-E/MF is a 256 Kbit SPI EEPROM from Microchip in an 8-pin DFN package offering up to 10 MHz clock operation and 160 ns access time. It supports up to 1 million write-erase cycles with a 200-year data retention minimum and operates from 2.5 V, making it suitable for microcontroller-based configuration storage, calibration data, and event logging applications.
- Manufacturer
- Microchip
- Package
- Small Outline No-lead
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 25LC256-E/MF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.6172(MOQ 25)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of 25LC256-E/MF?
- 256 Kbit (32 KB) serial EEPROM with SPI interface up to 10 MHz
- 1,000,000 write-erase cycle endurance for frequent data update applications
- 200-year minimum data retention for long-life configuration storage
- Operates from 2.5 V supply at 5 MHz and full speed at 5 V
- 160 ns read access time enabling fast data retrieval
- Compact 8-pin DFN package with minimal PCB footprint
What is 25LC256-E/MF used for?
25LC256-E/MF is used in microcontroller systems to store non-volatile configuration parameters, calibration coefficients, and firmware settings that must survive power cycling. It suits IoT sensor nodes and industrial instrumentation where 32 KB of SPI-accessible EEPROM provides ample space for device-specific data alongside the main MCU. The high endurance of 1 million write cycles also makes it practical for data logging applications that record periodic measurements over the product lifetime.
What are the specifications of 25LC256-E/MF?
| Pbfree Code | Yes |
| Manufacturer Package Code | DFN-S-8 |
| Factory Lead Time | 14Weeks |
| YTEOL | 8 |
| Additional Feature | OPERATES WITH 2.5VMIN @ 5MHZ |
| Clock Frequency-Max (fCLK) | 10MHz |
| Data Retention Time-Min | 200 |
| Endurance | 1000000 Write/Erase Cycles |
| JESD-30 Code | R-PDSO-N8 |
| JESD-609 Code | e3 |
| Memory Density | 262144bit |
| Memory IC Type | EEPROM |
| Memory Width | 8 |
| Number of Functions | 1 |
| Number of Ports | 1 |
| Number of Words | 32768words |
| Number of Words Code | 32000 |
| Operating Mode | SYNCHRONOUS |
| Organization | 32KX8 |
| Output Characteristics | 3-STATE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOLCC8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Parallel/Serial | SERIAL |
| Peak Reflow Temperature (Cel) | 260 |
| Programming Voltage | 5V |
| Qualification Status | Not Qualified |
| 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 |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Write Cycle Time-Max (tWC) | 5ms |
| Write Protection | HARDWARE/SOFTWARE |
| Package | Small Outline No-lead |
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 | Philippines, Thailand |
Where can I find the 25LC256-E/MF datasheet?
25LC256-E/MF Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for 25LC256-E/MF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How much storage capacity does 25LC256-E/MF provide and how is it organized for SPI access?
25LC256-E/MF provides 256 Kbits (32 KB) of EEPROM storage organized as 32,768 bytes addressable over the SPI bus. The 16-bit address space allows byte-level random read access and page-write operations of up to 64 bytes per write cycle, covering typical configuration and calibration data storage needs for embedded systems.
At what maximum SPI clock frequency can 25LC256-E/MF operate and does that change with supply voltage?
25LC256-E/MF supports SPI clock frequencies up to 10 MHz at a 5 V supply. When operating at 2.5 V, the maximum clock frequency reduces to 5 MHz, so designers using 3.3 V or lower supply rails should verify the achievable clock rate at their specific operating voltage to ensure reliable data transfer.
How long will data stored in 25LC256-E/MF persist and how many times can a cell be rewritten?
25LC256-E/MF is rated for a minimum data retention period of 200 years without rewriting, making it extremely reliable for storing factory calibration values or manufacturing serial numbers. Each memory cell supports up to 1,000,000 write-erase cycles before wear mechanisms degrade reliability, which is adequate for applications that update stored values thousands of times per year over a 10-year product lifetime.
Which microcontroller families can directly interface with 25LC256-E/MF using standard SPI peripherals?
25LC256-E/MF uses a standard 4-wire SPI interface (SCK, SI, SO, CS) compatible with the hardware SPI peripherals of virtually any modern microcontroller including Microchip PIC, AVR, ARM Cortex-M, and ESP32 families. The device supports SPI modes 0,0 and 1,1, so no special configuration beyond standard SPI mode selection is required on the host controller.
For a compact IoT device, what package does 25LC256-E/MF come in and how small is it?
25LC256-E/MF comes in an 8-pin DFN (MF suffix) package, which has a body size of approximately 2 mm × 3 mm. This no-lead surface-mount footprint is significantly smaller than the equivalent SOIC-8 package and is well suited for dense IoT PCBs, wearable devices, or space-constrained daughter cards where every square millimeter of board area is valuable.
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More from Microchip
| Qty. | Unit Price | Ext. Price |
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| 25+ | $1.8900 | $47.25 |
| 100+ | $1.7500 | $175.00 |
| 720+ | $1.6736 | $1204.98 |
| 1000+ | $1.6500 | $1650.00 |
| 1440+ | $1.6453 | $2369.19 |
| 2880+ | $1.6172 | $4657.42 |
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