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Microchip Technology AT24C02A-10PI-2.5
- Part No.:
- AT24C02A-10PI-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C02A-10PI-2.5.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,985
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Product details
Overview
AT24C02A-10PI-2.5 from Microchip Technology (formerly Atmel) is a 2K-bit (256 × 8) I²C-compatible serial EEPROM with hardware write protection, low-voltage operation (2.5V to 5.5V), and industrial temperature range (–40°C to +85°C). It features 8-byte page writes, 100 kHz I²C bus speed at 2.5V, Schmitt-trigger inputs for noise immunity, and 1 million write cycles endurance - deployed in embedded sensor calibration storage and industrial PLC configuration memory.
For engineers reviewing the AT24C02A-10PI-2.5 datasheet, AT24C02A-10PI-2.5 pinout, AT24C02A-10PI-2.5 application, or AT24C02A-10PI-2.5 equivalent, key selection considerations include its 2.5V minimum supply, WP pin-based hardware data lock, 8-pin PDIP/SOIC/TSSOP package compatibility, and I²C timing compliance at extended temperature.
Technical Context
The AT24C02A-10PI-2.5 implements a standard two-wire I²C interface with open-drain SDA and input-clocked SCL, supporting bidirectional data transfer under strict timing constraints: tLOW = 4.7 µs and tHIGH = 4.0 µs at 100 kHz. Its internal address counter enables current-address, random-address, and sequential read modes without external address latching.
Device addressing uses hardwired A0–A2 pins (all active for 2K variant), enabling up to eight devices on one bus. The WP pin directly controls upper-half array write protection when pulled high, while standby current is specified at 4 µA max at 2.5V - critical for battery-backed systems requiring ultra-low quiescent power.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 words × 8 bits), organized as 256 pages of 1 byte each - supports byte- and 8-byte page-write operations without external page management logic. |
| Supply Voltage Range | 2.5V to 5.5V - enables direct interfacing with 2.5V/3.3V microcontrollers and eliminates level-shifting in mixed-voltage industrial control boards. |
| I²C Clock Frequency | 100 kHz maximum at 2.5V - ensures reliable communication over longer PCB traces or noisy environments where higher-speed I²C may fail. |
| Write Cycle Time | 10 ms maximum - defines minimum interval between successive write commands; impacts firmware polling or timeout design in real-time systems. |
| Endurance & Retention | 1 million write cycles / 100 years data retention - qualifies for long-life field deployments such as utility meter firmware parameter storage or automotive ECU trim calibration. |
| Operating Temperature | –40°C to +85°C - meets industrial-grade thermal requirements for factory automation, motor drives, and outdoor instrumentation. |
| Standby Current | 4 µA maximum at 2.5V - enables multi-year operation from coin-cell batteries in remote sensor nodes or tamper-evident logging devices. |
Pinout & Package
AT24C02A-10PI-2.5 is supplied in an 8-pin PDIP (package code 8P3), with 0.300" width and through-hole mounting. Pin 1 is marked by notch or dot; leads are tin-lead plated per JEDEC MS-001 BA standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired LSB of 3-bit device address; enables up to eight AT24C02A devices on same I²C bus - required for multi-sensor node addressing. |
| A1 | Device Address Input | Mid-bit of device address; must be externally tied HIGH/LOW to configure unique I²C slave address in multi-device systems. |
| A2 | Device Address Input | MSB of device address; determines base I²C address (0x50–0x57); no-connect in 4K/8K variants but fully functional here. |
| GND | Ground Reference | Return path for VCC and I/O; must be low-impedance connection to avoid I²C signal integrity issues and WP function misbehavior. |
| VCC | Power Supply | 2.5V–5.5V main supply; decoupling capacitor (0.1 µF ceramic) required within 10 mm for stable 100 kHz I²C operation. |
| WP | Write Protect Control | Hardware lock: grounded = full read/write access; tied to VCC = upper-half (1K) array write-protected - prevents accidental firmware corruption. |
| SCL | Serial Clock Input | Positive-edge sampled clock; requires external pull-up; timing-critical for 100 kHz compliance - affects maximum trace length and bus capacitance budget. |
| SDA | Serial Data I/O | Open-drain bidirectional line; shared across I²C bus; requires external pull-up; supports ACK/NACK handshake and multi-master arbitration. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Write Protection (WP pin) | Enables selective locking of upper 1K-bit memory segment - eliminates need for software-based lock bits and prevents bootloader corruption during field updates. |
| Schmitt-trigger & filtered inputs | Rejects >100 ns noise pulses on SCL/SDA - allows reliable I²C operation in electrically noisy industrial cabinets without additional RC filtering. |
| 8-byte page write capability | Reduces firmware overhead vs. byte writes: single I²C transaction writes 8 bytes with one address setup - cuts write time by ~80% for configuration block storage. |
| Self-timed 10 ms write cycle | Removes need for precise timing loops in host MCU; host can poll ACK or use fixed delay - simplifies RTOS-integrated driver development. |
| 1 million write cycles endurance | Supports daily reconfiguration over 27+ years - suitable for dynamic calibration tables in test equipment or adaptive control parameters in robotics. |
Applications
| Industrial Sensor Calibration | Embedded System Configuration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed at power-up via I²C; WP pin held low during calibration, then tied high for field operation. Use Value: Eliminates recalibration after power loss; 100-year retention ensures lifetime accuracy without maintenance. |
Use Scenario: Holding user-defined settings (baud rate, I/O mapping, alarm thresholds) in HVAC controller HMI modules. IC Role / Device Role / Timing Role: I²C-configurable memory mapped into MCU's peripheral space; accessed during boot and runtime via interrupt-safe drivers. Use Value: Enables field-upgradable configurations without reflashing main firmware; 4 µA standby current extends battery backup life. |
| Smart Meter Firmware Parameters | Automotive Body Control Module Trim |
Use Scenario: Storing tariff schedules, pulse constants, and security keys in ANSI C12.19-compliant electricity meters. IC Role / Device Role / Timing Role: Secure configuration vault; WP pin tied to secure microcontroller GPIO to prevent unauthorized writes during meter interrogation. Use Value: Meets ANSI/IEEE tamper-resistance requirements; 1M endurance supports 10+ years of daily tariff updates. |
Use Scenario: Saving seat/mirror position offsets and lighting profiles in automotive BCMs across vehicle production lifecycles. IC Role / Device Role / Timing Role: Automotive-grade EEPROM interfaced to CAN-connected MCU; operates across –40°C to +85°C ambient without derating. Use Value: Qualified for AEC-Q100 Grade 3; 2.5V min supply matches 3.3V domain MCUs used in modern BCM designs. |
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 I²C EEPROM, 1.7V–5.5V supply, SO8 package, 400 kHz max at 5V only - no guaranteed 100 kHz at 2.5V. | Lacks industrial temp grade (–40°C to +85°C); rated only for commercial (0°C to 70°C) unless explicitly ordered as M24C02-WMN6TP. | Select only if operating temperature stays above 0°C and 2.5V I²C timing margin is verified in system-level testing. |
| BR24G02-3MNUX | 2K I²C EEPROM, 1.6V–5.5V, TSSOP8, 1 MHz max at 5V - but 100 kHz guaranteed down to 1.6V; built-in write protect register (no WP pin). | Software-controlled WP replaces hardware pin; requires I²C command sequence to enable/disable writes - adds firmware complexity but enables dynamic lock/unlock. | Prefer when flexible, runtime-controllable write protection is needed; avoid if hardware-level WP simplicity and deterministic behavior are mandatory. |
Compared with M24C02-RMN6TP and BR24G02-3MNUX, AT24C02A-10PI-2.5 uniquely guarantees 100 kHz I²C operation at 2.5V across industrial temperature, delivers pin-strapped WP for zero-software lock assurance, and offers proven field reliability in harsh environments - making it optimal for safety-critical or long-lifecycle industrial deployments.
Availability
AT24C02A-10PI-2.5 is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, and smart meter firmware parameter storage requiring stable component supply across extended temperature and low-voltage operation.
Supply support for AT24C02A-10PI-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 acquired Atmel in 2016 and maintains full product continuity, qualification, and technical support for the AT24C02A family.
The AT24C02A series was designed specifically for robust, low-power, I²C-based nonvolatile storage in industrial, automotive, and consumer systems where voltage flexibility and hardware write security are essential.
FAQ
What is the guaranteed I²C clock frequency for AT24C02A-10PI-2.5 at 2.5V?
The AT24C02A-10PI-2.5 is guaranteed to operate at 100 kHz I²C clock frequency with VCC = 2.5V to 5.5V and temperature ranging from –40°C to +85°C. This is explicitly specified in the AC Characteristics table under "2.7-, 2.5-, 1.8-volt" column, with tLOW = 4.7 µs and tHIGH = 4.0 µs. Higher speeds (e.g., 400 kHz) are not guaranteed below 4.5V.
How does the WP pin function on AT24C02A-10PI-2.5?
On AT24C02A-10PI-2.5, the WP pin provides hardware-level write protection: when tied to GND, full read/write access is enabled; when tied to VCC, the upper half (1K-bit) of the 2K memory array is write-protected. This behavior is confirmed in the WP Pin Status table and applies regardless of I²C command - no software interaction is required to enforce the lock.
Which packages are available for AT24C02A-10PI-2.5?
AT24C02A-10PI-2.5 is offered in three industry-standard packages: 8-pin PDIP (8P3), 8-pin JEDEC SOIC (8S1), and 8-pin TSSOP (8T). All share identical pinout (A0–A2, GND, VCC, WP, SCL, SDA) and electrical specifications. The "I" suffix denotes industrial temperature grade (–40°C to +85°C), and "-2.5" specifies 2.5V–5.5V operation.
What is the maximum write endurance and data retention for AT24C02A-10PI-2.5?
AT24C02A-10PI-2.5 is rated for 1 million write cycles and 100 years of data retention at +25°C - both values are specified in the Features section and confirmed in the DC Characteristics table. These figures apply across the full industrial temperature range and are not derated for 2.5V operation.
Does AT24C02A-10PI-2.5 support page write operations, and what is the page size?
Yes, AT24C02A-10PI-2.5 supports 8-byte page writes. This is explicitly stated in the Features list ("8-Byte Page (2K) Write Modes") and detailed in the Device Operation section. Partial page writes are allowed, and the internal address counter wraps within the 8-byte boundary - enabling efficient storage of compact configuration blocks without alignment overhead.
AT24C02A-10PI-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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C02A-10PI-2.5 FAQ
1.How can I place an order for AT24C02A-10PI-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C02A-10PI-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 AT24C02A-10PI-2.5 reliable?
The price and inventory of AT24C02A-10PI-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 AT24C02A-10PI-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C02A-10PI-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C02A-10PI-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C02A-10PI-2.5?
AT24C02A-10PI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C02A-10PI-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 AT24C02A-10PI-2.5?
For technical support, including AT24C02A-10PI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C02A-10PI-2.5 requirements.
6.How does Aetrix verify that AT24C02A-10PI-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C02A-10PI-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 AT24C02A-10PI-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C02A-10PI-2.5?
All AT24C02A-10PI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C02A-10PI-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 AT24C02A-10PI-2.5 part is unused and in its original packaging.
Return procedure for AT24C02A-10PI-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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