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Microchip Technology AT24C02A-10PI
- Part No.:
- AT24C02A-10PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C02A-10PI.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,968
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Product details
Overview
AT24C02A-10PI from Microchip Technology (formerly Atmel) is a 2K-bit (256 × 8) I²C-compatible serial EEPROM with hardware write protection, designed for nonvolatile data storage in embedded control and power management circuits. It operates from 2.7V to 5.5V, supports 100 kHz I²C communication at low voltage, delivers 1 million write cycles, and retains data for 100 years - deployed in industrial sensor nodes and programmable logic controllers.
For engineers reviewing the AT24C02A-10PI datasheet, AT24C02A-10PI pinout, AT24C02A-10PI application, or AT24C02A-10PI equivalent, this page provides verified package mapping (8-pin PDIP), validated I²C timing parameters (tWR = 10 ms max, fSCL = 100 kHz @ 2.7V), endurance and retention specs, WP pin behavior, and industrial-grade (-40°C to +85°C) operation context.
Technical Context
The AT24C02A-10PI implements a two-wire I²C interface with open-drain SDA/SCL pins, Schmitt-triggered inputs for noise immunity, and bidirectional data transfer using ACK/NACK handshaking. Its internal 256-word × 8-bit array uses 8-bit word addressing and supports byte and 8-byte page writes.
Write protection is controlled by the WP pin: tied to GND for full read/write access; tied to VCC to lock the upper 1K-bit half of memory. The device enters standby mode after STOP condition receipt and features acknowledge polling for write-cycle completion detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8), organized as 256 addressable bytes - enables compact configuration storage without external address latching |
| Supply Voltage Range | 2.7V to 5.5V - supports direct interfacing with 3.3V microcontrollers and legacy 5V systems |
| I²C Clock Frequency | 100 kHz maximum at 2.7V - ensures reliable timing margin in noisy industrial environments |
| Write Cycle Time | 10 ms maximum - defines minimum interval between successive write commands; impacts firmware retry logic design |
| Endurance | 1 million write cycles - guarantees long-term reliability in logging or calibration update applications |
| Data Retention | 100 years at +25°C - validates suitability for unattended field-deployed equipment requiring zero maintenance |
| Operating Temperature | -40°C to +85°C - certified for industrial ambient conditions without derating |
Pinout & Package
AT24C02A-10PI is supplied in an 8-pin PDIP (package code 8P3), 0.300" wide, through-hole format compliant with JEDEC MS-001 BA. Pin 1 is marked with a notch or dot; leads are tin-lead plated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hard-wired input enabling up to eight AT24C02A devices on one I²C bus; must match external pull-up/down for unique addressing |
| A1 | Device Address Input | Second address bit; used with A0 and A2 to configure 3-bit device ID (000–111) for multi-device bus topology |
| A2 | Device Address Input | Third address bit; all three address pins (A0–A2) are active for AT24C02A, unlike AT24C04A/08A where some are NC |
| GND | Ground Reference | Primary return path for VCC and I/O; requires low-impedance connection to minimize noise coupling into SDA/SCL |
| VCC | Power Supply | 2.7V–5.5V supply input; decoupling capacitor (0.1 µF ceramic) required within 1 cm for stable I²C operation |
| WP | Write Protect Control | Hardware-enforced memory lock: VCC = protect upper 1K-bit half; GND = full read/write access |
| SCL | Serial Clock Input | Positive-edge clock for data-in; negative-edge clock for data-out; requires external pull-up resistor (typically 4.7 kΩ) |
| SDA | Serial Data I/O | Bidirectional open-drain line shared across I²C bus; requires same pull-up as SCL and wire-OR compatibility with other slaves |
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 |
| Noise-Immune I²C Interface | Schmitt-triggered SDA/SCL inputs with 100 ns noise suppression - eliminates false start/stop detection in electrically harsh PLC cabinets |
| Low-Voltage Operation | Full functionality down to 2.7V - enables direct integration with battery-backed or energy-harvesting subsystems |
| Page Write Capability | 8-byte page write mode - reduces I²C transaction overhead by 87% vs. sequential byte writes for block configuration saves |
| High Reliability | 1M write cycles and 100-year data retention - eliminates need for wear-leveling firmware in fixed-parameter storage applications |
Applications
| Industrial Sensor Calibration | PLC Configuration Storage |
|---|---|
Use Scenario: Storing temperature compensation coefficients and sensor offset values in factory-calibrated pressure transmitters operating in -40°C to +85°C environments. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed via I²C during power-up initialization and periodic recalibration routines. Use Value: Enables field-deployed sensors to retain calibrated accuracy over 10+ years without battery backup or service intervention. |
Use Scenario: Holding ladder logic configuration, I/O mapping, and alarm thresholds in modular programmable logic controllers used in manufacturing lines. IC Role / Device Role / Timing Role: Persistent settings store accessed during cold boot and updated only during engineering-mode downloads. Use Value: Guarantees deterministic startup behavior and eliminates manual dip-switch configuration, reducing commissioning time by >90%. |
| Smart Meter Firmware Patch Log | Medical Device Usage History |
Use Scenario: Recording firmware patch version IDs and application timestamps in ANSI C12.22-compliant electricity meters subject to utility remote updates. IC Role / Device Role / Timing Role: Tamper-resistant audit trail memory written once per successful OTA update, protected by WP pin during normal operation. Use Value: Provides verifiable update history for regulatory compliance audits while preventing unauthorized modification via hardware lock. |
Use Scenario: Logging cumulative runtime, calibration events, and error codes in Class IIa portable infusion pumps requiring traceable maintenance records. IC Role / Device Role / Timing Role: Secure event logger storing time-stamped entries accessible only via authenticated host MCU commands. Use Value: Meets IEC 62304 software lifecycle requirements for permanent, nonvolatile operational history without flash wear concerns. |
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 | 2K-bit I²C EEPROM, 1.7V–5.5V supply, 400 kHz max clock, SO-8 package (not PDIP) | Higher speed and wider voltage range but lacks industrial temp grade (-40°C to +85°C) certification | Select when board space constraints favor SOIC and system operates above -25°C |
| BR24G02-3SER | 2K-bit I²C EEPROM, 1.6V–5.5V, 1 MHz max clock, built-in write protection register (no WP pin), TSSOP-8 | Software-configurable protection and faster timing, but requires firmware support for lock control instead of hardware pin | Select when dynamic protection enable/disable is needed and TSSOP footprint is acceptable |
Compared with M24C02-RMN6TP and BR24G02-3SER, AT24C02A-10PI uniquely combines industrial temperature rating, hardware WP pin, PDIP package for prototyping/serviceability, and guaranteed 100 kHz timing at 2.7V - making it optimal for ruggedized, maintainable industrial control designs where pin-level simplicity and environmental robustness are prioritized over raw speed or package density.
Availability
AT24C02A-10PI is available at Aetrix Electronics and suitable for industrial automation, smart metering, and medical device manufacturing requiring stable component supply across extended product lifecycles.
Supply support for AT24C02A-10PI 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 AT24C02A series was engineered for cost-sensitive, space-constrained industrial systems needing reliable, low-power nonvolatile storage with minimal external components and proven long-term data integrity.
FAQ
What is the maximum I²C clock frequency supported by AT24C02A-10PI at 2.7V?
The AT24C02A-10PI supports up to 100 kHz I²C clock frequency when operated at 2.7V. This is specified in the AC Characteristics table under "2.7-, 2.5-, 1.8-volt" column for fSCL. Higher frequencies (up to 400 kHz) are only guaranteed at 5.0V operation - critical for timing budget validation in 3.3V industrial designs.
How does the WP pin function on AT24C02A-10PI?
On AT24C02A-10PI, the WP pin provides hardware write protection: when pulled to VCC, it locks the upper 1K-bit (addresses 0x80–0xFF) of memory against writes while allowing full read access; when grounded, all 256 bytes are readable and writable. This behavior is distinct from AT24C04A/08A, where WP protects larger segments.
What package type is used for AT24C02A-10PI?
AT24C02A-10PI uses an 8-pin PDIP (Plastic Dual Inline Package), designated as package code 8P3 per Atmel's ordering information. It measures 0.300" wide with standard 0.100" lead pitch, enabling breadboard and through-hole PCB prototyping without adapters.
Is AT24C02A-10PI rated for industrial temperature operation?
Yes, AT24C02A-10PI is explicitly qualified for industrial temperature range: -40°C to +85°C. This is confirmed in the Ordering Information table where "AT24C02A-10PI" is listed under "Industrial (-40°C to 85°C)" operation range - essential for deployment in factory-floor controllers and outdoor utility equipment.
What is the write endurance and data retention specification for AT24C02A-10PI?
AT24C02A-10PI guarantees 1 million write cycles and 100 years of data retention at +25°C. These values are specified in the Features section and DC Characteristics table, and apply directly to the AT24C02A-10PI variant - validating its use in infrequently updated but mission-critical configuration storage.
AT24C02A-10PI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C02A-10PI FAQ
1.How can I place an order for AT24C02A-10PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C02A-10PI 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 AT24C02A-10PI reliable?
The price and inventory of AT24C02A-10PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C02A-10PI is usually 5 days.
3.What payment methods are accepted for AT24C02A-10PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C02A-10PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C02A-10PI?
AT24C02A-10PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C02A-10PI 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 AT24C02A-10PI?
For technical support, including AT24C02A-10PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C02A-10PI requirements.
6.How does Aetrix verify that AT24C02A-10PI is sourced from the original manufacturer or authorized distributors?
All AT24C02A-10PI 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 AT24C02A-10PI meets industry standards.
7.What is the process for return or replacement of AT24C02A-10PI?
All AT24C02A-10PI units undergo pre-shipment inspection (PSI). If there is an issue with AT24C02A-10PI, 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 AT24C02A-10PI part is unused and in its original packaging.
Return procedure for AT24C02A-10PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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