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Microchip Technology AT24C02A-10PC-2.5
- Part No.:
- AT24C02A-10PC-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C02A-10PC-2.5.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,205
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Product details
Overview
AT24C02A-10PC-2.5 from Atmel (now Microchip) is a 2K-bit (256 × 8) I²C-compatible serial EEPROM with hardware write protection, low-voltage operation (2.5V to 5.5V), and 100 kHz clock compatibility. It features 8-byte page writes, 1 million write cycles endurance, and 100-year data retention - deployed in industrial control panels, smart metering firmware storage, and embedded sensor calibration data logging.
For engineers reviewing the AT24C02A-10PC-2.5 datasheet, AT24C02A-10PC-2.5 pinout, AT24C02A-10PC-2.5 application, or AT24C02A-10PC-2.5 equivalent, key selection considerations include its 2.5V minimum supply, PDIP-8 package, WP-enabled hardware data protection, and compatibility with microcontroller I²C peripherals operating down to 100 kHz at 2.5V.
Technical Context
The AT24C02A-10PC-2.5 implements a standard two-wire I²C interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain bidirectional data transfer. Its device addressing uses hardwired A0–A2 pins to support up to eight devices on one bus.
It supports byte and 8-byte page write modes with self-timed internal write cycles (≤10 ms), automatic address incrementing within pages, and acknowledge polling for write completion detection. The Write Protect (WP) pin enables hardware-level lock of the upper 1K-bit array when pulled high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 words × 8 bits), organized as 256 × 1-byte pages - supports compact firmware parameter storage without external address latches. |
| Supply Voltage Range | 2.5V to 5.5V - enables direct interfacing with 2.5V/3.3V microcontrollers and legacy 5V systems without level shifting. |
| I²C Clock Frequency | 100 kHz max at 2.5V - ensures reliable timing margin in noise-prone industrial environments with long trace runs. |
| Write Cycle Time | ≤10 ms - defines minimum interval between write commands; requires software polling or timeout handling in host firmware. |
| Endurance & Retention | 1 million write cycles / 100 years data retention - suitable for field-updatable calibration tables or infrequently modified configuration registers. |
| ESD Protection | >3000V HBM - provides robustness against handling and board-level electrostatic discharge during assembly and service. |
| Operating Temperature | 0°C to +70°C (Commercial grade) - validated for use in indoor consumer and commercial electronics, not extended industrial or automotive. |
Pinout & Package
AT24C02A-10PC-2.5 is supplied in an 8-lead, 0.300" wide plastic dual-inline package (PDIP), compliant with JEDEC MS-001 BA. Pin 1 is marked by a notch or dot; leads are tin-lead plated, RoHS-compliant variants available per ordering code suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired inputs setting 3-bit slave address (0x50–0x57); enable up to eight AT24C02A devices on one I²C bus. |
| SDA | Serial Data I/O | Bidirectional open-drain line - requires external pull-up resistor; shares bus with other I²C peripherals. |
| SCL | Serial Clock Input | Master-generated clock; rising edge samples data, falling edge drives data - synchronizes all I²C transfers. |
| WP | Write Protect Control | Active-high hardware lock: when tied to VCC, protects upper 1K-bit memory block from accidental writes. |
| GND | Ground Reference | Signal and power return path; must be low-impedance and decoupled near VCC pin to suppress I²C noise. |
| VCC | Power Supply | Primary supply input (2.5V–5.5V); requires local 0.1 µF ceramic decoupling capacitor adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Write Protection | WP pin disables writes to upper half (1K-bit) of memory when driven high - prevents corruption of critical boot parameters during firmware updates. |
| Noise-Immune I²C Interface | Schmitt-triggered SDA/SCL inputs with built-in filtering - eliminates false start/stop detection in electrically noisy factory or building automation environments. |
| Page Write Capability | 8-byte page write mode reduces I²C transaction overhead by 87% vs. sequential byte writes - accelerates bulk configuration saves. |
| Low-Voltage Operation | Guaranteed 100 kHz I²C functionality at 2.5V - supports battery-backed or energy-harvesting systems where supply headroom is constrained. |
| High Reliability | 1M write cycles and 100-year data retention - eliminates need for wear-leveling firmware in applications with <100 annual writes. |
Applications
| Industrial Sensor Node | Smart Energy Meter |
|---|---|
Use Scenario: Stores calibrated offset/gain coefficients and temperature compensation tables for analog sensor front-ends in remote environmental monitors. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed via I²C during system initialization and periodic recalibration. Use Value: Enables field-deployed sensors to retain calibration across power cycles and firmware upgrades without external backup power. |
Use Scenario: Holds tariff schedules, billing counters, and tamper-event logs in utility-grade electricity meters operating at 2.5V–3.3V rails. IC Role / Device Role / Timing Role: Secure, WP-protected data logger with deterministic 10 ms write latency - meets IEC 62056-21 data integrity requirements. Use Value: Hardware write lock prevents unauthorized modification of billing data while allowing safe firmware update parameter storage. |
| Consumer Appliance UI | Medical Diagnostic Device |
Use Scenario: Saves user preferences (brightness, language, timer settings) and error history in washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Low-power I²C slave with 3 µA standby current - extends battery life in cordless remote handsets. Use Value: 2.5V operation allows direct connection to 3.3V MCU I/O without level shifters, reducing BOM cost and PCB area. |
Use Scenario: Stores patient-specific calibration profiles and diagnostic test result templates in portable ultrasound or ECG units. IC Role / Device Role / Timing Role: Fail-safe configuration store with >3000V HBM ESD rating - withstands clinical environment static discharge events. Use Value: 100-year data retention ensures calibration validity over full product lifecycle without periodic reprogramming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Microchip 24LC02BT-I/P | Same 2K-bit capacity, 2.5V–5.5V range, PDIP-8 package; identical pinout and I²C protocol but rated for Industrial (-40°C to +85°C). | Supports wider temperature range; no WP pin function - relies on software lock or external logic for write protection. | Select when extended temperature operation is required and hardware WP is not mandatory. |
| ON Semiconductor CAT24C02WI-GT3 | 2K-bit, 1.7V–5.5V supply, TSSOP-8 package; includes WP pin and 100 kHz @ 1.7V, but lacks 14-pin SOIC option. | Enables ultra-low-voltage operation (1.7V) and smaller footprint; lower ESD rating (2000V HBM) than AT24C02A-10PC-2.5. | Select for space-constrained, battery-powered designs needing sub-2.5V operation and TSSOP packaging. |
Compared with 24LC02BT-I/P and CAT24C02WI-GT3, the AT24C02A-10PC-2.5 uniquely combines commercial-grade PDIP-8 packaging, hardware WP functionality, and guaranteed 100 kHz operation at 2.5V - making it optimal for cost-sensitive, noise-immune industrial control boards requiring physical write lock.
Availability
AT24C02A-10PC-2.5 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, and consumer appliance UIs requiring stable component supply, long-term obsolescence planning, and consistent PDIP-8 sourcing.
Supply support for AT24C02A-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 (formerly Atmel) is a global semiconductor company specializing in microcontrollers, analog, and nonvolatile memory solutions for industrial, automotive, and consumer markets.
The AT24C02A series belongs to Microchip's legacy serial EEPROM product line, designed specifically for reliable, low-power, I²C-based configuration and calibration data storage in resource-constrained embedded systems.
FAQ
What voltage range does the AT24C02A-10PC-2.5 support, and is it compatible with 3.3V microcontrollers?
AT24C02A-10PC-2.5 operates from 2.5V to 5.5V, fully supporting 3.3V I/O interfaces without level translation. Its VIH threshold is VCC × 0.7 (min), ensuring reliable recognition of 3.3V logic highs, and VOL is ≤0.2V at 0.15 mA - compatible with standard 3.3V MCU open-drain drivers. The AT24C02A-10PC-2.5 also maintains 100 kHz I²C timing at 3.3V.
How does the Write Protect (WP) pin function on the AT24C02A-10PC-2.5?
When the WP pin of the AT24C02A-10PC-2.5 is pulled high (to VCC), it hardware-locks the upper 1K-bit memory block (addresses 0x080–0x0FF), preventing all write and page-write operations to that region. When WP is grounded, full read/write access is enabled. This feature is independent of software commands and remains active across power cycles - critical for safeguarding boot configuration data in the AT24C02A-10PC-2.5.
What is the maximum I²C clock frequency supported by the AT24C02A-10PC-2.5 at 2.5V?
The AT24C02A-10PC-2.5 supports a maximum I²C clock frequency of 100 kHz when operated at 2.5V. This is specified in the AC Characteristics table under "2.7-, 2.5-, 1.8-volt" conditions. While higher frequencies (up to 400 kHz) are supported at 5.0V, the AT24C02A-10PC-2.5's -2.5 suffix guarantees correct timing behavior only up to 100 kHz at its minimum rated supply voltage.
Can the AT24C02A-10PC-2.5 be used in place of the standard AT24C02A-10PC without design changes?
Yes - the AT24C02A-10PC-2.5 is pin-compatible and functionally identical to AT24C02A-10PC except for its extended 2.5V–5.5V supply range (vs. 4.5V–5.5V for the -10PC variant). All pin functions, timing, and I²C protocol are identical. No PCB or firmware modifications are needed; the AT24C02A-10PC-2.5 simply adds flexibility for lower-voltage operation while maintaining full backward compatibility.
What package type is used for the AT24C02A-10PC-2.5, and what are its key mechanical dimensions?
The AT24C02A-10PC-2.5 uses an 8-lead PDIP package (JEDEC MS-001 BA), 0.300" wide, with 0.100" lead pitch. Overall body dimensions are 0.355" × 0.240" (9.02 mm × 6.10 mm), and lead length is 0.115" max. This through-hole package supports manual soldering, socket-based prototyping, and legacy industrial board layouts - distinct from SOIC or TSSOP variants of the same part number.
AT24C02A-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
AT24C02A-10PC-2.5 FAQ
1.How can I place an order for AT24C02A-10PC-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C02A-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 AT24C02A-10PC-2.5 reliable?
The price and inventory of AT24C02A-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 AT24C02A-10PC-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C02A-10PC-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C02A-10PC-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C02A-10PC-2.5?
AT24C02A-10PC-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C02A-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 AT24C02A-10PC-2.5?
For technical support, including AT24C02A-10PC-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C02A-10PC-2.5 requirements.
6.How does Aetrix verify that AT24C02A-10PC-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C02A-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 AT24C02A-10PC-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C02A-10PC-2.5?
All AT24C02A-10PC-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C02A-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 AT24C02A-10PC-2.5 part is unused and in its original packaging.
Return procedure for AT24C02A-10PC-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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