24LC256-I/SM Microchip Integrated Circuit (Small Outline Packages) In Stock
The 24LC256-I/SM is a 256 Kbit (32 KB) I2C serial EEPROM from Microchip operating at up to 400 kHz with 1,000,000 write/erase cycle endurance and 200-year data retention. It features an 8-pin SOIJ package and hardware address pins for up to 8 devices on one bus. Ideal for embedded systems requiring non-volatile parameter storage, configuration data, and calibration tables.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 24LC256-I/SM Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.9061(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 256 Kbit (32 KB) non-volatile storage in compact 8-pin SOIJ package
- I2C interface at up to 400 kHz for fast data transfers in embedded systems
- 1,000,000 write/erase cycle endurance for high-reliability data logging
- 200-year data retention ensures long-term non-volatile storage integrity
- 3 hardware address pins allow up to 8 devices on a single I2C bus
- 2.5 V to 5.5 V supply range compatible with 3.3 V and 5 V microcontroller systems
Applications
The 24LC256-I/SM is widely used in embedded systems to store calibration constants, configuration parameters, and firmware settings that must survive power cycles. Its 32 KB capacity and I2C interface make it a natural companion to microcontrollers like PIC and AVR in consumer electronics, industrial sensors, and medical monitoring devices. Applications such as smart meters, HVAC controllers, and wearable devices rely on its combination of high endurance, compact footprint, and multi-device bus sharing.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOIJ-8 |
| Factory Lead Time | 7Weeks |
| YTEOL | 8 |
| Clock Frequency-Max (fCLK) | 0.4MHz |
| Data Retention Time-Min | 200 |
| Endurance | 1000000 Write/Erase Cycles |
| I2C Control Byte | 1010DDDR |
| JESD-30 Code | R-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,.3 |
| Package Shape | RECTANGULAR |
| 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 | 0.0000015A |
| 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 | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| 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 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for 24LC256-I/SM:
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Frequently Asked Questions
How many write cycles can the 24LC256-I/SM endure before data reliability degrades?
The 24LC256-I/SM is rated for 1,000,000 write/erase cycles per cell, providing excellent longevity for applications that update configuration data frequently. Combined with its 200-year data retention specification, it suits both high-cycle data loggers and infrequent-write calibration storage scenarios across industrial temperature ranges.
Can multiple 24LC256-I/SM devices share the same I2C bus, and how is addressing handled?
Yes, up to 8 devices can be placed on a single I2C bus using the three hardware address pins (A0, A1, A2) to set unique 3-bit addresses. Each chip responds to the 7-bit I2C address starting with the 4-bit control code 1010, giving a combined addressable space of 256 KB when all 8 devices are populated on a 3.3 V or 5 V system.
What supply voltage range does the 24LC256-I/SM support, and is it directly compatible with 3.3 V microcontrollers?
The 24LC256-I/SM operates from 2.5 V to 5.5 V, making it directly compatible with both 3.3 V ARM Cortex-M and 5 V PIC/AVR microcontroller systems without level-shifting circuitry. At 3.3 V the I2C bus runs at up to 400 kHz, enabling efficient read and write operations within tight firmware timing budgets.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.1000 | $1.10 |
| 2+ | $0.9093 | $1.82 |
| 5760+ | $0.9061 | $5218.96 |
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