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Microchip Technology AT24C02A-10PC
- Part No.:
- AT24C02A-10PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C02A-10PC.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,930
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Product details
Overview
AT24C02A-10PC from Microchip Technology (formerly Atmel) is a 2K-bit (256 × 8) I²C-compatible serial EEPROM with hardware write protection, low-voltage operation (2.7V–5.5V), and 100 kHz maximum clock frequency. It features 8-byte page writes, 1 million write cycles endurance, and 100-year data retention - deployed in embedded systems for parameter storage, calibration data backup, and configuration memory in industrial controllers and consumer electronics.
For engineers reviewing the AT24C02A-10PC datasheet, AT24C02A-10PC pinout, AT24C02A-10PC application, or AT24C02A-10PC equivalent, key selection considerations include its 2.7V–5.5V supply range, PDIP-8 package, WP pin-based hardware write protection, 10 ms max write cycle time, and compatibility with standard I²C bus timing at 100 kHz.
Technical Context
The AT24C02A-10PC implements a two-wire I²C interface with open-drain SDA and Schmitt-triggered SCL inputs for noise immunity. Its internal 256-word × 8-bit array uses hardwired A0–A2 address pins to support up to eight devices on one bus. Write protection is controlled exclusively by the WP pin state - tied to GND for full read/write access or VCC to lock the upper 1K-bit half of memory.
It operates in byte-write and 8-byte page-write modes, with automatic address incrementing within pages and rollover at page boundaries. Acknowledge polling enables host firmware to detect write completion without fixed delays, supporting deterministic timing in real-time systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8), organized as nonvolatile configuration storage with random and sequential access |
| Supply Voltage Range | 2.7V to 5.5V - supports mixed-voltage systems and brown-out tolerant operation down to 2.7V |
| I²C Clock Frequency | 100 kHz max - compatible with legacy microcontrollers and low-speed control buses |
| Write Cycle Time | 10 ms maximum - defines minimum interval between write commands; impacts firmware retry logic design |
| Endurance | 1 million write cycles - enables frequent updates in logging or calibration applications |
| Data Retention | 100 years at +25°C - ensures long-term reliability in unattended equipment |
| ESD Protection | >3000V HBM - reduces need for external ESD clamping in board-level design |
Pinout & Package
AT24C02A-10PC is supplied in an 8-pin PDIP (Plastic Dual Inline Package), 0.300" wide, with JEDEC MS-001 BA footprint. Pin 1 is marked by a notch or dot; leads are tin-lead plated and RoHS-compliant per manufacturer documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired LSB of 3-bit device address; enables up to eight AT24C02A-10PC units on same I²C bus |
| A1 | Device Address Input | Mid-bit of device address; used with A0 and A2 to uniquely identify this instance on multi-device bus |
| A2 | Device Address Input | MSB of device address; all three (A0–A2) must match host's transmitted address for communication |
| GND | Ground Reference | Return path for VCC and signal currents; requires low-impedance connection to system ground plane |
| VCC | Power Supply | Primary power input (2.7V–5.5V); decoupling capacitor (0.1 µF) recommended near pin |
| WP | Write Protect Control | Hardware-enforced memory lock: grounded = full R/W; connected to VCC = upper 1K-bit protected |
| SCL | I²C Clock Input | Positive-edge sampled clock; requires external pull-up; Schmitt trigger enables noise-tolerant timing |
| SDA | I²C Data I/O | Bidirectional open-drain line; shared across multiple I²C devices; requires external pull-up resistor |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Write Protection via WP pin | Prevents accidental overwrites during power transitions or firmware faults - no software dependency required |
| Low-voltage operation (2.7V–5.5V) | Enables direct interfacing with 3.3V and 5V microcontrollers without level-shifting circuitry |
| 8-byte page write capability | Reduces I²C transaction overhead vs. byte writes - improves throughput when storing contiguous configuration blocks |
| 100-year data retention | Eliminates need for periodic refresh or backup power in battery-free applications like smart meters and sensors |
| 1 million write cycles endurance | Supports daily reconfiguration over 27+ years - suitable for field-upgradable firmware parameter tables |
Applications
| Industrial PLC Configuration Storage | Consumer Appliance Calibration Memory |
|---|---|
Use Scenario: Storing sensor calibration coefficients, motor tuning parameters, and user preferences in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed via I²C during boot and runtime updates. Use Value: Enables field recalibration without firmware reflashing; WP pin prevents corruption during unexpected power loss. |
Use Scenario: Retaining cooking profiles, display brightness settings, and energy usage history in microwave ovens and washing machines. IC Role / Device Role / Timing Role: Low-power, infrequently written memory mapped to MCU I²C peripheral during setup mode. Use Value: Survives 10+ years of household use; 2.7V operation ensures reliable writes during brown-out conditions. |
| Medical Device Setup Parameters | Automotive Body Control Module Settings |
Use Scenario: Holding patient-specific therapy settings, alarm thresholds, and audit logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage accessed only during authorized service mode. Use Value: WP pin disables writes outside maintenance windows; 100-year retention meets medical device lifecycle requirements. |
Use Scenario: Saving seat position memory, mirror presets, and lighting configurations in automotive BCMs. IC Role / Device Role / Timing Role: I²C-connected persistent memory updated during ignition-off events and queried at startup. Use Value: 1M write cycles accommodate lifetime user adjustments; 8-byte page writes minimize bus occupancy during vehicle wake-up. |
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, TSSOP-8 package | Higher speed and wider voltage range; lacks dedicated WP pin - write protection implemented via software lock bytes | Select when faster bus timing or ultra-low-voltage (1.7V) operation is required; verify WP functionality alignment with system security policy |
| CAT24C02WI-GT3 | 2K-bit I²C EEPROM, 1.7V–5.5V supply, 400 kHz max clock, SOIC-8 package, AEC-Q200 qualified | Automotive-grade qualification and tighter parametric tolerances; identical pinout but different WP behavior (active-high vs. AT24C02A-10PC's active-high with VCC tie) | Choose for automotive body electronics where AEC-Q200 compliance and extended temperature (-40°C to +125°C) are mandatory |
Compared with M24C02-RMN6TP and CAT24C02WI-GT3, the AT24C02A-10PC offers proven industrial reliability in PDIP-8, explicit hardware WP control tied to VCC/GND, and optimized 100 kHz timing for cost-sensitive control systems - making it ideal for legacy designs and applications prioritizing simplicity and robustness over speed or automotive certification.
Availability
AT24C02A-10PC is available at Aetrix Electronics and suitable for industrial automation, consumer appliance manufacturing, and medical device production requiring stable component supply, long-lifecycle support, and consistent PDIP-8 packaging.
Supply support for AT24C02A-10PC 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, datasheet support, and manufacturing for the AT24C02A family. The company specializes in microcontrollers, memory, and analog semiconductors for embedded applications.
The AT24C02A series belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power, I²C-based nonvolatile storage in space-constrained and cost-sensitive embedded systems.
FAQ
What is the operating voltage range of the AT24C02A-10PC?
The AT24C02A-10PC operates from 2.7V to 5.5V DC. This dual-voltage capability allows direct integration with both 3.3V and 5V microcontroller systems without level-shifting circuitry. The "-2.7" suffix in the ordering code AT24C02A-10PC-2.7 explicitly confirms this low-voltage variant, distinct from the 4.5V–5.5V-only standard version.
How does the Write Protect (WP) pin function on the AT24C02A-10PC?
On the AT24C02A-10PC, the WP pin provides hardware-level write protection: when tied to GND, full read/write access is enabled; when tied to VCC, the upper 1K-bit half of the 2K memory array is locked against writes. This behavior is fixed per the AT24C02A datasheet and differs from later variants that support full-array or software-controlled protection.
What package type is used for the AT24C02A-10PC?
The AT24C02A-10PC uses an 8-pin PDIP (Plastic Dual Inline Package), 0.300" wide, per JEDEC MS-001 BA standard. Its through-hole footprint supports prototyping and legacy PCB assembly. The "PC" suffix in the part number explicitly denotes this PDIP configuration, distinguishing it from SOIC (SC), TSSOP (TC), or industrial-grade (I) variants.
What is the maximum I²C clock frequency supported by the AT24C02A-10PC?
The AT24C02A-10PC supports a maximum I²C clock frequency of 100 kHz under its 2.7V–5.5V operating range. This is specified in the AC Characteristics table for the "-2.7" voltage option. While higher-speed variants (e.g., AT24C02A-10PC with "-1.8" suffix) also cap at 100 kHz, the 5V-only versions support up to 400 kHz - a distinction confirmed in the Ordering Information tables.
Does the AT24C02A-10PC support page writing, and what is the page size?
Yes, the AT24C02A-10PC supports page writing with an 8-byte page size. This allows up to eight sequential bytes to be written in a single I²C transaction, reducing bus overhead compared to individual byte writes. Page boundaries are fixed at 8-byte intervals, and address roll-over occurs within the same page - a behavior documented in the "Page Write" section of the AT24C02A datasheet.
AT24C02A-10PC 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C02A-10PC FAQ
1.How can I place an order for AT24C02A-10PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C02A-10PC 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 reliable?
The price and inventory of AT24C02A-10PC 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 is usually 5 days.
3.What payment methods are accepted for AT24C02A-10PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C02A-10PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C02A-10PC?
AT24C02A-10PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C02A-10PC 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?
For technical support, including AT24C02A-10PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C02A-10PC requirements.
6.How does Aetrix verify that AT24C02A-10PC is sourced from the original manufacturer or authorized distributors?
All AT24C02A-10PC 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 meets industry standards.
7.What is the process for return or replacement of AT24C02A-10PC?
All AT24C02A-10PC units undergo pre-shipment inspection (PSI). If there is an issue with AT24C02A-10PC, 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 part is unused and in its original packaging.
Return procedure for AT24C02A-10PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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