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Microchip Technology AT24C02A-10PI-1.8
- Part No.:
- AT24C02A-10PI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C02A-10PI-1.8.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,604
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Product details
Overview
AT24C02A-10PI-1.8 from Microchip Technology (formerly Atmel) is a 2K-bit (256 × 8) two-wire serial EEPROM with 1.8V to 5.5V supply operation, 8-byte page write capability, and hardware write protection via the WP pin. It delivers 100 kHz I²C clock rate at 1.8V, supports −40°C to +85°C industrial temperature range, and is housed in an 8-lead PDIP package - ideal for low-power embedded systems requiring nonvolatile parameter storage.
For engineers reviewing the AT24C02A-10PI-1.8 datasheet, AT24C02A-10PI-1.8 pinout, AT24C02A-10PI-1.8 application, or AT24C02A-10PI-1.8 equivalent, key selection considerations include its 1.8V minimum operating voltage, WP-enabled hardware data lock, 8-pin DIP footprint compatibility, and 1 million write cycle endurance - critical for battery-powered sensors, firmware configuration storage, and industrial control registers.
Technical Context
The AT24C02A-10PI-1.8 implements a standard two-wire (I²C-compatible) interface with open-drain SDA and Schmitt-triggered SCL inputs for noise immunity. Its internal 256-word × 8-bit array is organized into 32 pages of 8 bytes each, enabling partial page writes without erasing adjacent locations.
Addressing uses three hardwired A0–A2 pins for device selection on shared buses, supporting up to eight AT24C02A devices per bus. Write protection is controlled solely by the WP pin: grounded for full read/write access, tied to VCC to lock the upper 1K-bit half of memory - a deterministic, pin-level security mechanism independent of software commands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8), sufficient for storing calibration coefficients, device IDs, or small configuration tables |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic families and mixed-voltage systems without level shifters |
| I²C Clock Rate | 100 kHz at 1.8V - ensures reliable timing margin under low-voltage conditions while maintaining interoperability with legacy I²C masters |
| Page Write Size | 8 bytes per page - minimizes write latency for burst updates and reduces host MCU overhead versus byte-write-only devices |
| Write Endurance | 1 million cycles - supports frequent field-updatable parameters in telemetry nodes or programmable power supplies |
| Data Retention | 100 years at 25°C - guarantees long-term integrity of stored settings across product lifecycle without refresh |
| Operating Temperature | −40°C to +85°C - validated for deployment in automotive body control modules and industrial PLC I/O expansion cards |
Pinout & Package
AT24C02A-10PI-1.8 is supplied in an 8-lead Plastic Dual Inline Package (PDIP), 0.300" wide, with through-hole mounting and JEDEC-standard pinout. The package features 0.100" lead pitch and 0.115"–0.150" lead length, compatible with standard wave-solder and manual assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired address bits enabling up to eight AT24C02A-10PI-1.8 devices on one I²C bus; no internal pull-ups required |
| SDA | Serial Data Line | Bidirectional, open-drain I²C data line - requires external pull-up resistor; supports wire-OR with other I²C peripherals |
| SCL | Serial Clock Input | Positive-edge clock input for data sampling; Schmitt-triggered for robust noise rejection in electrically noisy environments |
| WP | Write Protect Control | Hardware-enforced memory lock: GND = full access, VCC = upper 1K-bit write-protection - immune to firmware corruption |
| VCC | Power Supply | 1.8V–5.5V main supply; decoupling capacitor placement near this pin is mandatory for stable 100 kHz I²C operation |
| GND | Ground Reference | Signal and power return path; must be connected to system ground plane with low-inductance trace for EMI control |
| NC | No-connect | Pin 5 is unconnected internally - must remain floating or tied to GND per layout best practices; no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| 1.8V Low-Voltage Operation | Enables direct integration with ultra-low-power microcontrollers (e.g., ARM Cortex-M0+ or MSP430) without voltage translation |
| Hardware Write Protection (WP) | Prevents accidental or malicious overwrites of critical calibration or security data - active at power-on, independent of firmware state |
| 8-Byte Page Write | Reduces total write time by >80% vs. sequential byte writes, lowering host CPU occupancy and system power during storage operations |
| Schmitt-Triggered Inputs | Rejects fast transients and slow-rising signals on SCL/SDA, eliminating need for external filtering in motor drive or power supply applications |
| 1 Million Write Cycles | Supports daily reconfiguration over 27 years - suitable for field-serviceable equipment requiring persistent runtime parameter logging |
Applications
| Smart Sensor Node | Industrial HMI Panel |
|---|---|
|
Use Scenario: Storing factory-calibrated sensor offsets and temperature compensation coefficients in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent calibration data accessed at boot and updated during field recalibration. Use Value: Eliminates need for external calibration dongles; 1.8V operation extends battery life; WP pin prevents corruption during brown-out events. |
Use Scenario: Retaining user-defined display brightness, language, and alarm thresholds across power cycles in panel-mounted HMIs. IC Role / Device Role / Timing Role: System configuration store accessed via I²C during GUI initialization and updated on menu save actions. Use Value: 8-byte page writes reduce save latency to <10 ms; 100-year retention ensures settings survive equipment decommissioning and reuse. |
| Automotive Body Controller | Medical Infusion Pump |
|
Use Scenario: Recording door lock actuation counts, window position limits, and mirror memory positions in 12V vehicle subsystems. IC Role / Device Role / Timing Role: Fault-tolerant parameter storage with hardware write lock to prevent unintended changes during CAN bus activity or ESD events. Use Value: WP pin tied to ignition signal ensures write disable during engine cranking; −40°C to +85°C rating matches under-hood thermal requirements. |
Use Scenario: Storing drug library profiles, dose history logs, and safety-critical alarm thresholds in Class II medical infusion devices. IC Role / Device Role / Timing Role: Certified nonvolatile memory for regulatory-required audit trails and operational parameters compliant with IEC 62304. Use Value: 1M endurance supports >10,000 dose deliveries before replacement; RoHS-compliant 8P3 package meets medical PCB material restrictions. |
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) | Lacks dedicated WP pin; uses software-controlled write protection only | Select when higher-speed 400 kHz operation is needed and board layout allows SOIC footprint; verify WP functionality alignment with system security requirements |
| BR24G02NUX-10 | 2K-bit I²C EEPROM, 1.6V–5.5V supply, 1 MHz clock, 8-pin TSSOP, built-in error correction | Includes ECC for enhanced data integrity; no hardware WP pin | Choose for mission-critical data where bit errors must be corrected autonomously; not drop-in due to TSSOP package and missing WP pin |
Compared with AT24C02A-10PI-1.8, M24C02-RMN6TP offers faster I²C speed but sacrifices hardware write protection, while BR24G02NUX-10 adds ECC at the cost of pinout and protection architecture compatibility - making AT24C02A-10PI-1.8 the optimal choice for designs requiring deterministic, pin-level memory locking in through-hole PDIP layouts.
Availability
AT24C02A-10PI-1.8 is available at Aetrix Electronics and suitable for smart sensor nodes, industrial HMI panels, automotive body controllers, and medical infusion pumps requiring stable component supply across extended production lifecycles.
Supply support for AT24C02A-10PI-1.8 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 is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with a focus on reliability, longevity, and embedded system integration.
The AT24C02A-10PI-1.8 belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power embedded applications demanding proven nonvolatile storage with hardware-level data integrity controls.
FAQ
What is the minimum operating voltage for the AT24C02A-10PI-1.8?
The AT24C02A-10PI-1.8 operates down to 1.8V, as confirmed in the Absolute Maximum Ratings and DC Characteristics tables. This allows direct connection to 1.8V I/O domains without level-shifting circuitry, and it maintains full 100 kHz I²C functionality at this voltage - a key differentiator from 2.7V-only variants like the AT24C02A-10PI-2.7.
Does the AT24C02A-10PI-1.8 support page write operations, and what is the page size?
Yes, the AT24C02A-10PI-1.8 supports 8-byte page writes, as explicitly stated in the Features section and Memory Organization description. Each of its 32 internal pages holds exactly 8 bytes, enabling efficient burst programming of contiguous configuration data without requiring individual byte-addressed writes.
How does the Write Protect (WP) pin function on the AT24C02A-10PI-1.8?
On the AT24C02A-10PI-1.8, the WP pin provides hardware-level memory protection: when pulled to VCC, it locks the upper 1K-bit half (addresses 0x100–0x1FF) against writes while allowing full read access; when grounded, normal read/write operations are enabled across the entire 2K-bit array - a feature distinct from software-based lock mechanisms.
What package type is used for the AT24C02A-10PI-1.8, and are there lead-free options?
The AT24C02A-10PI-1.8 uses an 8-lead PDIP (Plastic Dual Inline Package), designated "8P3" in Microchip's ordering nomenclature. While the -10PI-1.8 suffix denotes standard industrial-grade PDIP, lead-free/halogen-free versions exist under codes like AT24C02A-10PU-1.8 (same PDIP package, "U" suffix indicating RoHS compliance).
What is the maximum write endurance and data retention specification for the AT24C02A-10PI-1.8?
The AT24C02A-10PI-1.8 is rated for 1 million write cycles and 100 years of data retention at 25°C, as specified in the Features list and confirmed in Table 5 (Endurance) of the datasheet. These values are measured under standard conditions (5.0V, 25°C, page mode) and represent guaranteed minimums per Microchip's qualification testing.
AT24C02A-10PI-1.8 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C02A-10PI-1.8 FAQ
1.How can I place an order for AT24C02A-10PI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C02A-10PI-1.8 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-1.8 reliable?
The price and inventory of AT24C02A-10PI-1.8 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-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C02A-10PI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C02A-10PI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C02A-10PI-1.8?
AT24C02A-10PI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C02A-10PI-1.8 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-1.8?
For technical support, including AT24C02A-10PI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C02A-10PI-1.8 requirements.
6.How does Aetrix verify that AT24C02A-10PI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C02A-10PI-1.8 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-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C02A-10PI-1.8?
All AT24C02A-10PI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C02A-10PI-1.8, 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-1.8 part is unused and in its original packaging.
Return procedure for AT24C02A-10PI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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