ST24C16M3 STMicroelectronics Integrated Circuit (Small Outline Packages) In Stock
The ST24C16M3 is a 16 Kbit (2 KB) serial I2C EEPROM from STMicroelectronics operating from 4.5 V to 5.5 V, supporting up to 100 kHz clock speed and 1 million write/erase cycles. Available in an 8-pin SO package for industrial and automotive storage of configuration, calibration, and log data from -40°C to 125°C.
- Manufacturer
- STMicroelectronics
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- ST24C16M3 Datasheet PDF
- Category
- Integrated Circuit
- 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 ST24C16M3?
- 16 Kbit (2 KB) EEPROM capacity organized as 2048 x 8-bit
- I2C serial interface at up to 100 kHz for easy MCU integration
- Up to 1,000,000 write/erase cycle endurance
- 10-year data retention at 55°C typical
- Supply voltage range 4.5 V to 5.5 V
- 8-pin SO-8 150 mil package for standard PCB footprints
- Industrial temperature range: -40°C to 125°C
- Hardware write protection pin for critical data segments
What is ST24C16M3 used for?
The ST24C16M3 is widely used to store configuration parameters, calibration tables, and event logs in industrial sensors, factory automation equipment, and consumer electronics requiring non-volatile memory. Its I2C interface allows a single bus to address up to 8 devices simultaneously, enabling modular system expansion without additional GPIO pins. Automotive and harsh-environment designers rely on its -40°C to 125°C operating range and 10-year data retention to maintain system configuration through power cycles and temperature extremes.
What are the specifications of ST24C16M3?
| Pbfree Code | No |
| YTEOL | 0 |
| Clock Frequency-Max (fCLK) | 0.1MHz |
| Data Retention Time-Min | 10 |
| Endurance | 1000000 Write/Erase Cycles |
| I2C Control Byte | 1010MMMR |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e0 |
| Memory Density | 16384bit |
| Memory IC Type | EEPROM |
| Memory Width | 8 |
| Number of Functions | 1 |
| Number of Words | 2048words |
| Number of Words Code | 2000 |
| Operating Mode | SYNCHRONOUS |
| Organization | 2KX8 |
| Output Characteristics | OPEN-DRAIN |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Parallel/Serial | SERIAL |
| Qualification Status | Not Qualified |
| Serial Bus Type | I2C |
| Standby Current-Max | 0.0001A |
| Supply Current-Max | 0.002mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | TIN LEAD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Write Cycle Time-Max (tWC) | 10ms |
| Write Protection | SOFTWARE |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.32.00.51 |
Where can I find the ST24C16M3 datasheet?
ST24C16M3 Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for ST24C16M3?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many write cycles does the ST24C16M3 endure and what does this mean for a logger application writing daily?
The ST24C16M3 is rated for 1,000,000 write/erase cycles per byte location, which equates to over 2,700 years of daily writes at one write per day per address. For higher-frequency logging, wear-leveling across its 2048 byte addresses extends operational life proportionally, keeping the device well within its endurance budget for decade-long industrial deployments.
How many ST24C16M3 devices can share a single I2C bus and how are they addressed?
Up to 8 ST24C16M3 devices can coexist on a single I2C bus by setting the 3 hardware address pins (A0, A1, A2) to unique combinations. Each device responds to its unique 7-bit address formed by the fixed upper nibble 1010 plus the 3 address bits, providing a total of 16 KB addressable storage across the 8-chip array.
What I2C clock frequency does the ST24C16M3 support and does it limit system throughput in fast I2C designs?
The ST24C16M3 operates at up to 100 kHz (standard-mode I2C), which allows a complete 2 KB read of the entire memory in approximately 1.7 ms. For designs requiring faster access, the ST24C16M3 may be a bottleneck compared to fast-mode (400 kHz) EEPROMs; in such cases the M3 variant is better suited for infrequent configuration reads rather than real-time streaming.
What data retention does the ST24C16M3 guarantee across its industrial temperature range?
The ST24C16M3 guarantees at least 10 years of data retention at 55°C, covering the full industrial operating range from -40°C to 125°C. This makes it suitable for storing permanent calibration tables in industrial controllers and automotive ECUs that must retain configuration across thousands of power-on and power-off cycles without external backup power.
How does the hardware write-protect pin on the ST24C16M3 prevent accidental overwrites of critical stored data?
Pulling the WP pin high places the entire 2 KB EEPROM array in hardware write-protect mode, rejecting all write commands from the I2C master without affecting read access. This safeguards factory-programmed calibration constants or firmware version identifiers from being corrupted by runaway software, providing a single 3.3 V or 5 V GPIO line as a simple protection mechanism.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
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