24LC256-E/MS Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip 24LC256-E/MS is a 256 Kbit (32 KB) I2C serial EEPROM in an 8-pin MSOP package, featuring up to 1,000,000 write/erase cycles and 200-year data retention, operating at up to 400 kHz for non-volatile data storage in embedded systems.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 24LC256-E/MS Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.9918(MOQ 1)
- 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 24LC256-E/MS?
- 256 Kbit (32 KB) I2C EEPROM capacity with up to 1,000,000 write/erase endurance cycles for high-reliability non-volatile storage
- 400 kHz I2C fast-mode operation enables rapid configuration and data writes in microcontroller-based embedded designs
- 200-year minimum data retention ensures long-term parameter and calibration storage without data loss over the product's service lifetime
- Compact 8-pin MSOP package reduces PCB footprint for space-constrained portable instruments, wearables, and IoT devices
What is 24LC256-E/MS used for?
The 24LC256-E/MS is widely used in embedded systems for storing calibration parameters, user configuration settings, firmware revision data, and event logs that must persist through power cycles. Its I2C interface and compact MSOP-8 package make it a natural fit for microcontroller platforms such as PIC, AVR, and ARM Cortex-M in consumer electronics, industrial sensors, medical devices, and smart metering equipment.
What are the specifications of 24LC256-E/MS?
| Pbfree Code | Yes |
| Manufacturer Package Code | MSOP-8 |
| Factory Lead Time | 11Weeks |
| YTEOL | 9 |
| Clock Frequency-Max (fCLK) | 0.4MHz |
| Data Retention Time-Min | 200 |
| Endurance | 1000000 Write/Erase Cycles |
| I2C Control Byte | 1010DDDR |
| JESD-30 Code | S-PDSO-G8 |
| 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 | OPEN-DRAIN |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.19 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE |
| Parallel/Serial | SERIAL |
| Peak Reflow Temperature (Cel) | 260 |
| Programming Voltage | 4.5V |
| Qualification Status | Not Qualified |
| Reverse Pinout | NO |
| Screening Level | AEC-Q100 |
| Serial Bus Type | I2C |
| Standby Current-Max | 0.000005A |
| Supply Current-Max | 0.003mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2.5V |
| Supply Voltage-Nom (Vsup) | 4.5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| 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 | Thailand |
Where can I find the 24LC256-E/MS datasheet?
24LC256-E/MS Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for 24LC256-E/MS?
Compatible alternatives and drop-in replacements for 24LC256-E/MS:
Frequently Asked Questions
How many write/erase cycles does the 24LC256-E/MS support, and what does that mean for an application that updates settings daily?
The 24LC256-E/MS supports a minimum of 1,000,000 write/erase cycles per byte location. For an application that updates a configuration byte once per day, this endurance rating translates to over 2,700 years of daily writes before wear-out, making the device effectively unlimited in lifespan for typical embedded parameter storage use cases.
What is the maximum I2C clock speed of the 24LC256-E/MS, and how does that affect data transfer time for a full 32 KB write?
The 24LC256-E/MS supports a maximum I2C clock frequency of 400 kHz in fast mode. At 400 kHz with a typical 64-byte page write sequence and accounting for acknowledge and address overhead, writing the full 32 KB capacity would require approximately 500 ms to 1 second, which is acceptable for one-time provisioning or firmware parameter updates but should be factored into boot initialization timing budgets.
How long can the 24LC256-E/MS retain data without power, and which long-life applications benefit from that rating?
Microchip specifies a minimum data retention time of 200 years for the 24LC256-E/MS at room temperature, making it suitable for applications requiring permanent or semi-permanent storage of calibration coefficients, serial numbers, or security keys. Industries such as medical device manufacturing, industrial metrology, and utility smart metering rely on this long retention rating to ensure product traceability data survives the entire equipment service life.
Can multiple 24LC256-E/MS devices share the same I2C bus, and how is address collision avoided?
Yes, up to 8 24LC256-E/MS devices can share the same 2-wire I2C bus simultaneously by setting the 3 hardware address pins (A0, A1, A2) to unique combinations using pull-up or pull-down resistors. The I2C control byte uses the pattern 1010DDDR, where DDD encodes the 3-bit device address, allowing up to 8 devices on a single bus for a combined addressable capacity of 256 KB across all devices.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
About Microchip
Microchip is a leading electronic component manufacturer. FindMyChip sources Microchip ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
More from Microchip
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.2100 | $1.21 |
| 5+ | $1.1122 | $5.56 |
| 100+ | $1.0600 | $106.00 |
| 1000+ | $1.0100 | $1010.00 |
| 1200+ | $1.0089 | $1210.68 |
| 2400+ | $0.9918 | $2380.39 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit