24LC256-I/ST Microchip Integrated Circuit (Small Outline Packages) In Stock
The 24LC256-I/ST is a 256-Kbit I2C serial EEPROM from Microchip Technology organized as 32K x 8 bits, operating from 2.5V with a 400-kHz clock interface and one million write/erase cycle endurance for industrial-grade applications. It provides 200-year minimum data retention in a compact 8-pin TSSOP surface-mount package. Available from authorized distributors with in-stock inventory and worldwide shipping for embedded system designs.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 24LC256-I/ST Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.9175(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 (32K x 8) I2C EEPROM with 400-kHz clock for reliable non-volatile data storage in industrial embedded systems
- One million write/erase cycle endurance with 200-year minimum data retention ensures long-term data integrity across the product lifetime
- 2.5V low-voltage operation with I2C address byte 1010DDDR supports up to eight devices sharing a single two-wire bus
- 8-pin TSSOP package (PDSO-G8) provides a tiny PCB footprint suitable for space-constrained industrial and consumer designs
Applications
The 24LC256-I/ST is commonly used to store configuration settings, calibration data, and firmware parameters in microcontroller-based industrial control systems, medical devices, and smart sensors. Its 256-Kbit capacity and I2C interface make it a straightforward addition to existing two-wire bus architectures in HVAC controllers, energy meters, and home automation gateways. The industrial temperature rating and 2.5V minimum supply also suit data logging in portable instruments and battery-powered IoT edge nodes.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | TSSOP-8 |
| Factory Lead Time | 9Weeks |
| 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 | TSSOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| 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 | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| 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 | Mainland China, Malaysia, Philippines, Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for 24LC256-I/ST:
suggested
suggested
suggested
suggested
suggested
suggested
suggested
suggested
suggested
Frequently Asked Questions
What is the storage capacity and organization of the 24LC256-I/ST?
The 24LC256-I/ST provides 256 Kbits of EEPROM storage organized as 32K x 8 bits, giving 32,768 bytes of addressable non-volatile memory. This capacity is commonly used to store firmware configuration tables, sensor calibration coefficients, and event logs in embedded microcontroller designs where non-volatile storage is required.
What is the maximum clock frequency and interface of the 24LC256-I/ST?
The 24LC256-I/ST uses the I2C serial interface with a maximum clock frequency of 400 kHz, supporting standard-mode and fast-mode I2C operation. The I2C control byte is 1010DDDR, allowing up to eight 24LC256 devices to coexist on the same two-wire bus by assigning unique address combinations through the hardware address pins.
What are the endurance and data retention specifications for the 24LC256-I/ST?
The 24LC256-I/ST supports one million write/erase cycles per memory cell address, providing a long operational lifespan for applications that update stored data regularly. Data retention is guaranteed for a minimum of 200 years under normal storage and operating conditions, ensuring the device reliably preserves critical configuration and calibration data over the product's full service life.
What package does the 24LC256-I/ST use, and what supply voltage does it require?
The device is packaged in an 8-pin TSSOP (Thin Shrink Small Outline Package, PDSO-G8) with a very small PCB footprint, well-suited for compact PCB layouts. It operates from a minimum supply voltage of 2.5V, making it compatible with 3.3V and 5V microcontroller systems as well as low-voltage embedded platforms running from a single lithium-ion cell.
Is the 24LC256-I/ST suitable for industrial applications, and what is its typical availability?
Yes, the 24LC256-I/ST is rated for industrial temperature ranges and carries a Pb-free, RoHS-compliant designation with a JESD-609 e3 rating. The factory lead time is approximately 9 weeks, but authorized Microchip distributors commonly stock the device for immediate delivery. The I/ST suffix indicates it is supplied in TSSOP tape-and-reel format, compatible with automated SMT assembly equipment.
Related Guides
150141RS73100 Red LED Indicator and Current-Resistor Design Guide
Design a reliable 150141RS73100 red LED indicator with worst-case resistor sizing, GPIO checks, PWM drive, layout, and production validation.
Jul 11, 2026
742792651 Ferrite Bead EMI Filter and Power Integrity Design Guide
Practical guidance for using 742792651 in ferrite-bead EMI filters, including bias, DCR, damping, layout, and validation.
Jul 11, 2026
How to Choose a Ferrite Bead for EMI Suppression Rails: Selection Guide
Compare 742792651 and related ferrite beads by impedance, current rating, DCR, package, layout, and EMI test context.
Jul 10, 2026
150141BS73100 Design Guide for 3528 Status Indicator LED Circuits
Design 3528 status indicator LED circuits with 150141BS73100: current setting, resistor sizing, polarity, optics, and sourcing checks.
Jul 10, 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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.1078 | $1.11 |
| 4+ | $1.0282 | $4.11 |
| 8+ | $1.0229 | $8.18 |
| 16+ | $0.9175 | $14.68 |
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.”