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Microchip Technology AT24C02AN-10SI
- Part No.:
- AT24C02AN-10SI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C02AN-10SI.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,811
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Product details
Overview
AT24C02AN-10SI from Microchip Technology (formerly Atmel) is a 2K-bit (256 × 8) I²C-compatible serial EEPROM with hardware write protection, low-voltage operation (2.7V to 5.5V), and industrial temperature range (–40°C to +85°C). It features 8-byte page writes, 100 kHz I²C bus speed at 2.7V, 1 million write cycles endurance, and 100-year data retention - deployed in embedded systems for configuration storage, calibration data logging, and firmware parameter backup.
For engineers reviewing the AT24C02AN-10SI datasheet, AT24C02AN-10SI pinout, AT24C02AN-10SI application, or AT24C02AN-10SI equivalent, key selection considerations include its 2.7V–5.5V supply range, SOIC-8 package, WP pin-based hardware write protection, 10 ms max write cycle time, and compatibility with microcontroller I²C peripherals in space-constrained industrial control modules.
Technical Context
The AT24C02AN-10SI implements a standard two-wire I²C interface with open-drain SDA and Schmitt-triggered SCL inputs for noise immunity. It uses hardwired A0–A2 address pins to support up to eight devices on a single bus and employs an internal 8-bit word address counter for sequential read operations.
Write protection is enforced via the WP pin: grounded for full read/write access, tied to VCC to lock the upper half (1K-bit) of memory. The device enters standby mode after STOP condition receipt and supports acknowledge polling to detect write completion without fixed delay timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8), organized as 256 words of 8 bits each - sufficient for small configuration tables or sensor calibration coefficients. |
| Supply Voltage Range | 2.7V to 5.5V - enables direct interfacing with 3.3V and 5V microcontrollers without level shifting. |
| I²C Clock Frequency | 100 kHz maximum at 2.7V - ensures reliable communication in electrically noisy industrial environments. |
| Write Cycle Time | 10 ms maximum - defines minimum interval between successive write commands; impacts real-time logging latency. |
| Endurance | 1 million write cycles - supports frequent updates in telemetry or event-logging applications over product lifetime. |
| Data Retention | 100 years at +25°C - guarantees long-term integrity of stored settings without battery backup. |
| Operating Temperature | –40°C to +85°C - qualified for use in industrial automation, automotive body electronics, and outdoor metering equipment. |
Pinout & Package
AT24C02AN-10SI is supplied in an 8-pin JEDEC SOIC package (package code 8S1), measuring 3.90 mm × 4.90 mm × 1.75 mm, with gull-wing leads and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired LSB of 3-bit device address; enables up to eight AT24C02AN-10SI devices on one I²C bus. |
| A1 | Device Address Input | Mid-bit of device address; combined with A0 and A2, selects unique I²C slave address (0x50–0x57). |
| A2 | Device Address Input | MSB of device address; all three pins (A2–A0) must match external wiring for correct slave selection. |
| GND | Ground Reference | Return path for VCC and signal logic; requires low-impedance connection to minimize noise coupling into I²C lines. |
| VCC | Power Supply | Primary power input (2.7V–5.5V); decoupling capacitor (0.1 µF) recommended within 1 cm of pin. |
| WP | Write Protect Control | Hardware-enforced memory lock: grounded = full read/write; connected to VCC = upper 1K-bit protected from writes. |
| SCL | Serial Clock Input | Master-generated clock signal; Schmitt-triggered input ensures robust edge detection in noisy environments. |
| SDA | Serial Data I/O | Bidirectional, open-drain line requiring external pull-up resistor (typically 2.2–10 kΩ) to VCC. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Write Protection | WP pin disables writes to upper 1K-bit memory segment when pulled high - prevents accidental firmware corruption during field updates. |
| Low-Voltage Operation | Functional down to 2.7V supply - eliminates need for voltage translators in mixed-voltage 3.3V/5V systems. |
| Noise-Immune I²C Interface | Schmitt-triggered SCL and filtered inputs suppress EMI-induced glitches - improves reliability in motor drive or power supply proximity. |
| Page Write Capability | 8-byte page writes reduce I²C transaction overhead by 87% vs. byte-by-byte writes - accelerates bulk configuration loading. |
| High Endurance & Retention | 1M write cycles and 100-year data retention - validated for use in unattended infrastructure monitoring nodes with 10+ year service life. |
Applications
| Industrial Sensor Node | Smart Meter Calibration Storage |
|---|---|
Use Scenario: Storing temperature compensation coefficients and factory calibration offsets in a wireless environmental sensor node operating at –25°C to +70°C. IC Role / Device Role / Timing Role: Nonvolatile configuration register providing persistent parameter storage between power cycles and firmware updates. Use Value: Enables field-deployed units to retain calibrated accuracy without battery-backed SRAM, reducing BOM cost and failure modes. |
Use Scenario: Holding metrology-grade calibration constants and tariff tables in a DIN-rail mounted electricity meter certified to IEC 62056. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for critical billing parameters accessed only during authorized maintenance sessions. Use Value: WP pin allows permanent locking of calibration data post-certification, meeting regulatory requirements for revenue-grade metering integrity. |
| PLC I/O Module Configuration | Automotive Body Control Unit |
Use Scenario: Saving user-defined I/O mapping, debounce timing, and fail-safe states in a modular programmable logic controller base unit. IC Role / Device Role / Timing Role: System-level configuration EEPROM accessed during boot to initialize FPGA or ASIC peripheral registers. Use Value: Eliminates need for manual DIP-switch setup; enables remote reconfiguration via HMI without hardware changes. |
Use Scenario: Storing seat position memory, mirror angle presets, and lighting profiles in a Class-D LED headlamp control module. IC Role / Device Role / Timing Role: Automotive-grade nonvolatile memory retaining user preferences across ignition cycles and battery disconnects. Use Value: Industrial temperature rating (–40°C to +85°C) and 1M endurance ensure reliable operation through thermal cycling and repeated personalization events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M24C02-RMN6TP | STMicroelectronics 2K I²C EEPROM; same 2.7–5.5V range, 100 kHz @ 2.7V, but uses different WP logic (active-high enable vs. AT24C02AN-10SI's active-high protect). | Requires inverted WP control signal routing; not drop-in for existing AT24C02AN-10SI PCBs with direct VCC/GND WP tie-off. | Select if sourcing ST ecosystem parts or requiring AEC-Q100 qualification (M24C02-RMN6TP is automotive-qualified). |
| CAT24C02WI-GT3 | onsemi 2K EEPROM; identical pinout and electrical specs, but rated for extended temperature (–40°C to +125°C) and offers enhanced ESD (4 kV HBM). | Valid for under-hood automotive use where ambient exceeds +85°C; higher ESD margin improves robustness in high-static assembly environments. | Prefer for new designs targeting extended temperature or higher ESD immunity; pin-compatible with no layout change required. |
Compared with M24C02-RMN6TP and CAT24C02WI-GT3, the AT24C02AN-10SI provides verified industrial-temperature operation with proven interoperability in legacy I²C systems, while offering lower cost and broader distributor availability - making it optimal for cost-sensitive industrial control and metering applications where extended temp or AEC-Q100 are not mandated.
Availability
AT24C02AN-10SI is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter calibration storage, and PLC I/O module configuration requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for AT24C02AN-10SI includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT24CxxA EEPROM family. The company specializes in microcontrollers, analog, and memory solutions for embedded control markets.
The AT24C02AN-10SI belongs to Microchip's legacy serial EEPROM product line, designed specifically for low-power, space-constrained industrial and commercial systems requiring reliable nonvolatile storage with minimal external components.
FAQ
What is the operating voltage range of the AT24C02AN-10SI?
The AT24C02AN-10SI operates from 2.7V to 5.5V DC, supporting both 3.3V and 5V system rails without level translation. This dual-voltage capability is confirmed in the "DC Characteristics" table of the official datasheet, where VCC3 min is specified as 2.7V and max as 5.5V. The -10SI suffix explicitly denotes the 2.7V–5.5V industrial-grade variant.
Does the AT24C02AN-10SI support page writes, and what is the page size?
Yes, the AT24C02AN-10SI supports 8-byte page writes, as documented in the "Features" and "Device Operation" sections. This allows up to eight consecutive bytes to be written in a single I²C transaction, significantly improving write efficiency compared to byte-by-byte programming. The page boundary is fixed at 8-byte intervals, and address roll-over occurs within the same page.
How does the Write Protect (WP) pin function on the AT24C02AN-10SI?
On the AT24C02AN-10SI, the WP pin enables hardware write protection: when tied to GND, full read/write access is granted; when tied to VCC, the upper half (1K-bit) of memory is locked against writes. This behavior is distinct from earlier AT24C02 versions and is explicitly defined in the "WP Pin Status" table of the datasheet for the AT24C02A family.
What package type is used for the AT24C02AN-10SI?
The AT24C02AN-10SI uses an 8-pin JEDEC SOIC package (package code 8S1), with 1.27 mm lead pitch and dimensions of 3.90 mm × 4.90 mm × 1.75 mm. This is confirmed in the "Packaging Information" section and the "AT24C02A Ordering Information" table, where "AT24C02AN-10SI" maps to the 8S1 footprint.
Is the AT24C02AN-10SI compatible with standard I²C protocols?
Yes, the AT24C02AN-10SI fully complies with standard I²C protocol specifications, including START/STOP conditions, ACK/NACK handshaking, and 7-bit slave addressing (with A2–A0 defining bits 6–4). Its AC characteristics - such as tLOW, tHIGH, and fSCL - meet I²C-mode timing requirements at 100 kHz for 2.7V operation, as verified in the "AC Characteristics" table.
AT24C02AN-10SI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C02AN-10SI FAQ
1.How can I place an order for AT24C02AN-10SI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C02AN-10SI on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT24C02AN-10SI reliable?
The price and inventory of AT24C02AN-10SI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C02AN-10SI is usually 5 days.
3.What payment methods are accepted for AT24C02AN-10SI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C02AN-10SI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C02AN-10SI?
AT24C02AN-10SI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C02AN-10SI order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT24C02AN-10SI?
For technical support, including AT24C02AN-10SI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C02AN-10SI requirements.
6.How does Aetrix verify that AT24C02AN-10SI is sourced from the original manufacturer or authorized distributors?
All AT24C02AN-10SI products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT24C02AN-10SI meets industry standards.
7.What is the process for return or replacement of AT24C02AN-10SI?
All AT24C02AN-10SI units undergo pre-shipment inspection (PSI). If there is an issue with AT24C02AN-10SI, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT24C02AN-10SI part is unused and in its original packaging.
Return procedure for AT24C02AN-10SI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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