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Microchip Technology AT24C02-10PC-2.5
- Part No.:
- AT24C02-10PC-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C02-10PC-2.5.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,020
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Product details
Overview
AT24C02-10PC-2.5 from Microchip Technology (formerly Atmel) is a 2K-bit (256 × 8) two-wire serial EEPROM optimized for low-voltage embedded systems. It operates from 2.5V to 5.5V, supports 100 kHz I²C bus speed, features hardware write protection via WP pin, and delivers 1 million write cycles with 100-year data retention. It is commonly used in industrial sensor calibration storage and power-meter firmware parameter backup.
For engineers reviewing the AT24C02-10PC-2.5 datasheet, AT24C02-10PC-2.5 pinout, AT24C02-10PC-2.5 application, or AT24C02-10PC-2.5 equivalent, key selection factors include its 2.5V minimum supply, 8-byte page write capability, SOIC-8 package compatibility, and I²C address flexibility using A0–A2 pins in multi-device bus configurations.
Technical Context
The AT24C02-10PC-2.5 implements a standard I²C-compatible 2-wire interface with open-drain SDA/SCL lines, Schmitt-triggered inputs for noise immunity, and bi-directional data transfer protocol with 9th-cycle ACK. Its internal memory is organized as 32 pages of 8 bytes each, requiring an 8-bit word address for random access.
Write protection is enforced exclusively through the WP pin: tied to VCC, it locks the full 2K array; tied to GND, full read/write operation is enabled. The device enters low-power standby mode after STOP condition receipt or power-up, drawing only 4 µA typical at 2.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8 bits), sufficient for storing configuration registers or small firmware patches in resource-constrained microcontrollers. |
| Supply Voltage Range | 2.5V to 5.5V - enables direct interfacing with 2.5V/3.3V logic without level shifters in battery-powered or low-power IoT nodes. |
| I²C Clock Frequency | 100 kHz max - compatible with legacy microcontroller I²C peripherals and ensures robust timing margins in noisy industrial environments. |
| Page Write Capacity | 8-byte page writes - reduces bus transaction overhead when updating consecutive parameters (e.g., sensor offset/gain tables). |
| Write Endurance | 1 million write cycles - supports frequent recalibration logging in test equipment or field-deployed monitoring devices. |
| Data Retention | 100 years at +25°C - guarantees long-term integrity of stored calibration coefficients or security keys without refresh. |
| Standby Current | 4 µA typical at 2.5V - minimizes quiescent power in always-on edge sensors or energy-harvesting applications. |
Pinout & Package
AT24C02-10PC-2.5 is supplied in an 8-pin PDIP (Plastic Dual Inline Package), 0.300" wide, with JEDEC-standard pinout and through-hole mounting compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hard-wired address bit enabling up to eight AT24C02 devices on one I²C bus; must match external pull-up/down for unique addressing. |
| A1 | Device Address Input | Second hard-wired address bit; combined with A0 and A2, defines 3-bit device address (111xxxxx format) for multi-drop topology. |
| A2 | Device Address Input | Third hard-wired address bit; all three (A0–A2) are active for AT24C02, unlike higher-density variants where some are NC. |
| GND | Ground Reference | System common return path; must be low-impedance to ensure stable I²C signal referencing and noise immunity. |
| VCC | Power Supply | Primary 2.5–5.5V supply; decoupling capacitor (0.1 µF) required near pin to suppress I²C switching transients. |
| WP | Write Protect Control | Active-high hardware lock: logic high disables all write operations including byte/page writes and erase - critical for firmware protection. |
| SCL | Serial Clock Input | Master-generated clock driving I²C timing; open-drain requires external pull-up; rise/fall times constrained per AC specs (tR/tF). |
| SDA | Serial Data I/O | Bi-directional open-drain data line shared across I²C bus; requires external pull-up and wire-OR capability with other slaves. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation down to 2.5V | Enables direct integration into 2.5V/3.3V microcontroller systems without voltage translation, reducing BOM count and layout complexity. |
| Hardware write protection (WP pin) | Provides deterministic, glitch-immune write disable independent of software state - essential for preventing accidental corruption during brown-out or reset. |
| 8-byte page write capability | Allows burst programming of up to 8 sequential bytes per I²C transaction, cutting write time by ~75% vs. individual byte writes. |
| Schmitt-triggered inputs | Rejects sub-microsecond noise spikes on SCL/SDA lines, eliminating false start/stop detection in electrically noisy factory-floor or motor-drive environments. |
| 100-year data retention | Eliminates need for periodic refresh or backup power in sealed industrial enclosures where maintenance access is infrequent or impossible. |
Applications
| Industrial Sensor Calibration | Smart Meter Parameter Storage |
|---|---|
Use Scenario: Storing temperature, pressure, and humidity sensor offset/gain coefficients during factory calibration and field recalibration. IC Role / Device Role / Timing Role: Nonvolatile parameter register bank accessed via I²C during boot or calibration routines; no timing-critical constraints. Use Value: Enables field-updatable calibration without firmware reflash; 1M endurance supports >100 recalibrations over product lifetime. |
Use Scenario: Holding tariff schedules, metering constants, and tamper-event logs in electricity/water/gas meters operating unattended for 15+ years. IC Role / Device Role / Timing Role: Secure, long-life configuration and event log storage; WP pin prevents unauthorized parameter modification. Use Value: 100-year retention ensures data integrity across entire meter service life; 2.5V operation supports supercapacitor backup during mains failure. |
| Embedded System Configuration | IoT Edge Device Identity |
Use Scenario: Saving user-configurable settings (network SSID, display brightness, alarm thresholds) in HVAC controllers and PLC I/O modules. IC Role / Device Role / Timing Role: Persistent settings store accessed during system initialization; page writes optimize save latency after UI interaction. Use Value: 8-byte page writes reduce save time to <10 ms, improving perceived responsiveness; SOIC-8 footprint simplifies PCB routing. |
Use Scenario: Storing device-specific cryptographic keys, MAC addresses, and firmware version stamps in battery-powered asset trackers and environmental sensors. IC Role / Device Role / Timing Role: Secure identity vault with hardware write lock; accessed once per boot for key loading and authentication handshake. Use Value: WP pin permanently disables writes after provisioning, preventing key overwrite; 4 µA standby current extends 10-year battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics M24C02-RMN6TP | Same 2K-bit capacity, 2.5–5.5V supply, and 100 kHz I²C speed; identical SOIC-8 and PDIP-8 packaging; differs in AC timing (tBUF = 1.2 µs vs. 4.7 µs) and WP behavior (active-low in some revisions). | Valid for drop-in replacement in new designs; requires validation of tBUF margin in high-noise environments due to tighter timing. | Select when sourcing diversification is needed and board-level timing margins exceed 1.2 µs. |
| ON Semiconductor CAT24C02WI-GT3 | 2K-bit EEPROM with 1.7–5.5V range (wider than AT24C02-10PC-2.5's 2.5–5.5V); same 8-byte page write and WP pin; differs in standby current (1 µA typ at 2.5V vs. 4 µA) and endurance (400k cycles). | Better suited for ultra-low-power applications below 2.5V; lower endurance may limit use in high-write-frequency calibration loops. | Prefer for energy-harvesting or coin-cell designs needing sub-2.5V operation; verify write-cycle count requirements. |
Compared with AT24C02-10PC-2.5, M24C02-RMN6TP offers tighter AC timing but narrower noise margin, while CAT24C02WI-GT3 extends voltage range downward at the cost of reduced endurance - both require validation against specific system-level timing and reliability targets.
Availability
AT24C02-10PC-2.5 is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter parameter storage, and embedded configuration management requiring stable component supply across extended product lifecycles.
Supply support for AT24C02-10PC-2.5 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 components, and nonvolatile memory solutions, with a focus on reliability and long-term product support.
The AT24Cxx family was designed for cost-sensitive, low-power embedded systems requiring robust, field-programmable nonvolatile storage - particularly in industrial automation, metering, and consumer electronics.
FAQ
What is the minimum operating voltage for AT24C02-10PC-2.5?
The AT24C02-10PC-2.5 operates down to 2.5V, as indicated by the "-2.5" suffix in its part number. This allows direct interface with 2.5V logic families and eliminates the need for level-shifting circuitry in mixed-voltage systems. Operation below 2.5V is not guaranteed and may result in unreliable I²C communication or incomplete writes. Always maintain VCC within 2.5V–5.5V per datasheet specifications.
Does AT24C02-10PC-2.5 support I²C fast-mode (400 kHz)?
No, AT24C02-10PC-2.5 is rated for 100 kHz maximum I²C clock frequency when operating at 2.5V, 2.7V, or 1.8V supply levels. The 400 kHz rating applies only to the 5.0V version (e.g., AT24C02-10PC). Attempting 400 kHz operation at 2.5V violates AC timing specifications and risks data corruption or bus lockup due to insufficient tLOW/tHIGH margins.
How many AT24C02-10PC-2.5 devices can share one I²C bus?
Up to eight AT24C02-10PC-2.5 devices can coexist on a single I²C bus, enabled by the three hardware address pins (A0, A1, A2). Each device must have a unique combination of these pins tied to VCC or GND to generate distinct 3-bit device addresses (111xxxxx format). No additional address decoding logic is required.
What happens when the WP pin of AT24C02-10PC-2.5 is left floating?
The WP pin of AT24C02-10PC-2.5 must never be left floating - it has no internal pull-up or pull-down. A floating WP pin causes undefined write protection behavior: writes may succeed unpredictably or fail intermittently, risking data corruption. Always tie WP to either GND (enabling writes) or VCC (disabling writes) using a dedicated trace or resistor.
Is AT24C02-10PC-2.5 RoHS compliant and lead-free?
Yes, AT24C02-10PC-2.5 is RoHS compliant and lead-free, consistent with Microchip's standard packaging for commercial-grade PDIP devices. The "PC" suffix denotes plastic DIP packaging meeting JEDEC MS-001BA, and all current production lots comply with Directive 2011/65/EU. Full compliance documentation is available in Microchip's official product change notices.
AT24C02-10PC-2.5 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:
- 2.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C02-10PC-2.5 FAQ
1.How can I place an order for AT24C02-10PC-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C02-10PC-2.5 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 AT24C02-10PC-2.5 reliable?
The price and inventory of AT24C02-10PC-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C02-10PC-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C02-10PC-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C02-10PC-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C02-10PC-2.5?
AT24C02-10PC-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C02-10PC-2.5 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 AT24C02-10PC-2.5?
For technical support, including AT24C02-10PC-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C02-10PC-2.5 requirements.
6.How does Aetrix verify that AT24C02-10PC-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C02-10PC-2.5 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 AT24C02-10PC-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C02-10PC-2.5?
All AT24C02-10PC-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C02-10PC-2.5, 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 AT24C02-10PC-2.5 part is unused and in its original packaging.
Return procedure for AT24C02-10PC-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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