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Microchip Technology AT24C02N-10SI-2.5
- Part No.:
- AT24C02N-10SI-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C02N-10SI-2.5.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,540
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Product details
Overview
AT24C02N-10SI-2.5 from Microchip Technology (formerly Atmel) is a 2 Kbit (256 × 8) serial EEPROM IC designed for nonvolatile data storage in low-power embedded systems. It operates from 2.5V to 5.5V, supports 100 kHz I²C bus speed at 2.5V, features hardware write protection via WP pin, and delivers 1 million write cycles with 100-year data retention. It is used in industrial sensor calibration, printer consumable authentication, and power meter firmware parameter storage.
For engineers reviewing the AT24C02N-10SI-2.5 datasheet, AT24C02N-10SI-2.5 pinout, AT24C02N-10SI-2.5 application, or AT24C02N-10SI-2.5 equivalent, key selection factors include its 2.5V–5.5V supply range, 8-pin SOIC package, 100 kHz I²C timing at low voltage, page-write capability (8-byte pages), and industrial temperature rating (−40°C to +85°C).
Technical Context
The AT24C02N-10SI-2.5 implements a standard two-wire (I²C-compatible) serial interface with open-drain SDA and Schmitt-triggered SCL inputs for noise immunity. It uses hard-wired A0–A2 address pins to support up to eight devices on a single bus, and includes a dedicated Write Protect (WP) pin that disables all write operations when pulled high.
Internally organized as 32 pages of 8 bytes each, it supports both byte-write and page-write modes with self-timed internal write cycles (≤10 ms). Its memory architecture requires an 8-bit word address for random access, and it maintains an internal address counter for sequential read operations.
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 space-constrained designs |
| Supply Voltage Range | 2.5V to 5.5V - enables direct interfacing with 2.5V logic domains without level shifting |
| I²C Clock Frequency | 100 kHz at 2.5V - ensures reliable communication in low-voltage industrial environments with marginal noise margins |
| Write Cycle Time | Max 10 ms - defines minimum interval between write commands; requires polling or timeout handling in host firmware |
| Endurance & Retention | 1 million write cycles / 100 years data retention - suitable for field-updatable parameters subject to infrequent but critical changes |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade operation in harsh ambient conditions |
| Package | 8-lead JEDEC SOIC (8S1) - surface-mount compatible with standard reflow profiles and automated assembly |
Pinout & Package
AT24C02N-10SI-2.5 is housed in an 8-lead JEDEC-standard SOIC package (8S1), measuring 4.9 mm × 3.9 mm × 1.75 mm, with gull-wing leads and 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hard-wired LSB of 3-bit device address; enables up to eight AT24C02N-10SI-2.5 devices on one I²C bus |
| A1 | Device Address Input | Mid-bit of device address; tied high/low to configure unique slave address in multi-device systems |
| A2 | Device Address Input | MSB of device address; combined with A0/A1, selects one of eight possible I²C addresses (0x50–0x57) |
| GND | Ground Reference | Return path for VCC and signal currents; must be low-impedance to maintain I²C signal integrity |
| VCC | Power Supply | Primary supply input (2.5V–5.5V); decoupling capacitor (0.1 µF) required near pin for noise suppression |
| WP | Write Protect Control | Active-high hardware lock: logic high disables all write operations, preventing accidental overwrites during power transients |
| SCL | Serial Clock Input | Input-only clock line with Schmitt trigger; synchronizes data transfer and defines I²C timing windows |
| SDA | Serial Data I/O | Open-drain bidirectional line; requires external pull-up resistor (typically 2.2–10 kΩ) to VCC for proper I²C bus operation |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation down to 2.5V | Enables direct integration into 2.5V microcontroller subsystems without voltage translation circuitry |
| Hardware write protection (WP pin) | Prevents unintended writes during brown-out, reset, or firmware glitches-critical for calibration data integrity |
| 8-byte page write capability | Reduces I²C transaction count vs. byte writes; improves write throughput for contiguous configuration blocks |
| Schmitt-triggered SCL inputs | Rejects high-frequency noise on clock line, improving robustness in electrically noisy industrial enclosures |
| 100-year data retention | Eliminates need for periodic refresh or backup power in battery-free applications like smart meters or HVAC controllers |
Applications
| Industrial Sensor Calibration | Printer Cartridge Authentication |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients and temperature compensation tables for analog sensor front-ends. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed during system boot or sensor initialization via I²C. Use Value: Enables plug-and-play sensor replacement with guaranteed accuracy; eliminates manual calibration per unit. |
Use Scenario: Securely storing cryptographic keys and usage counters in OEM ink/toner cartridges to prevent third-party refills. IC Role / Device Role / Timing Role: Tamper-resistant identity storage accessed during printer power-up handshake sequence. Use Value: Supports secure challenge-response authentication while surviving repeated cartridge insertions and thermal cycling. |
| Smart Energy Meter Firmware Parameters | Medical Device Configuration Backup |
Use Scenario: Holding tariff schedules, pulse constants, and utility-specific communication settings updated remotely over PLC or RF links. IC Role / Device Role / Timing Role: Persistent parameter store written infrequently but read on every metering cycle; accessed via isolated I²C bridge. Use Value: Ensures regulatory-compliant metering continuity after power loss or firmware update rollback. |
Use Scenario: Saving user-adjusted therapy parameters (e.g., infusion rate limits, alarm thresholds) in portable insulin pumps or nebulizers. IC Role / Device Role / Timing Role: Fail-safe configuration vault written only during confirmed user save actions; retains data across battery swaps. Use Value: Meets IEC 62304 safety requirements for data persistence without volatile RAM backup capacitors. |
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 | STMicroelectronics 2 Kbit EEPROM; identical 2.5V–5.5V range and 8-lead SOIC package, but rated for −40°C to +105°C extended temp | Supports higher ambient temperatures in automotive under-hood modules where AT24C02N-10SI-2.5 is limited to +85°C | Select when operating above 85°C or requiring ST's AEC-Q200 qualification path |
| CAT24C02WI-GT3 | ON Semiconductor 2 Kbit EEPROM; same voltage range and pinout, but specifies 400 kHz I²C at 2.5V (vs. 100 kHz for AT24C02N-10SI-2.5) | Enables faster parameter loading in time-critical boot sequences where AT24C02N-10SI-2.5's 100 kHz limit creates latency | Select when full-speed I²C timing at 2.5V is mandatory and layout allows tighter noise control |
Compared with M24C02-RMN6TP and CAT24C02WI-GT3, the AT24C02N-10SI-2.5 offers proven industrial reliability at −40°C to +85°C with conservative 100 kHz timing at 2.5V, making it optimal for cost-sensitive, noise-prone industrial controls where extended temperature or maximum speed is not required.
Availability
AT24C02N-10SI-2.5 is available at Aetrix Electronics and suitable for industrial sensor calibration, printer consumable authentication, and smart energy meter firmware parameter storage requiring stable component supply across long production lifecycles.
Supply support for AT24C02N-10SI-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 continues to manufacture, qualify, and support the AT24Cxx family of serial EEPROMs with full backward compatibility.
The AT24C02N-10SI-2.5 belongs to Microchip's legacy serial EEPROM product line, engineered for robust, low-power nonvolatile storage in industrial, medical, and consumer electronics where data integrity and long-term reliability are essential.
FAQ
What is the maximum I²C clock frequency supported by AT24C02N-10SI-2.5 at 2.5V?
The AT24C02N-10SI-2.5 supports up to 100 kHz I²C clock frequency when operated at 2.5V. This is specified in the AC Characteristics table under "2.7-, 2.5-, 1.8-volt" column for fSCL. At 5.0V, it supports 400 kHz, but the -2.5 suffix denotes optimization for the lower voltage range where timing margins are tighter.
Does AT24C02N-10SI-2.5 support page writes, and what is the page size?
Yes, the AT24C02N-10SI-2.5 supports page writes with an 8-byte page size. As a 2 Kbit (256 × 8) device internally organized into 32 pages, it allows up to eight sequential bytes to be written in a single I²C transaction, reducing bus overhead versus individual byte writes.
How does the Write Protect (WP) pin function on AT24C02N-10SI-2.5?
When the WP pin of AT24C02N-10SI-2.5 is driven high (to VCC), all write operations-including byte, page, and write-enable instructions-are disabled. When WP is grounded, normal read/write functionality is restored. This hardware lock prevents accidental overwrites during power transitions or firmware errors.
What package type and dimensions does AT24C02N-10SI-2.5 use?
AT24C02N-10SI-2.5 uses an 8-lead JEDEC SOIC package (8S1), with body dimensions of 4.90 mm × 3.90 mm × 1.75 mm and 1.27 mm lead pitch. The "SI" in the part number explicitly denotes this SOIC variant, distinguishing it from PDIP ("P") or TSSOP ("T") versions.
Is AT24C02N-10SI-2.5 qualified for industrial temperature operation?
Yes, AT24C02N-10SI-2.5 is rated for industrial temperature operation from −40°C to +85°C. This is confirmed by the "I" suffix in the ordering code and verified in the AT24C02 Ordering Information table, which lists AT24C02N-10SI-2.5 under the Industrial (-40°C to 85°C) operation range.
AT24C02N-10SI-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C02N-10SI-2.5 FAQ
1.How can I place an order for AT24C02N-10SI-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C02N-10SI-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 AT24C02N-10SI-2.5 reliable?
The price and inventory of AT24C02N-10SI-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 AT24C02N-10SI-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C02N-10SI-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C02N-10SI-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C02N-10SI-2.5?
AT24C02N-10SI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C02N-10SI-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 AT24C02N-10SI-2.5?
For technical support, including AT24C02N-10SI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C02N-10SI-2.5 requirements.
6.How does Aetrix verify that AT24C02N-10SI-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C02N-10SI-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 AT24C02N-10SI-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C02N-10SI-2.5?
All AT24C02N-10SI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C02N-10SI-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 AT24C02N-10SI-2.5 part is unused and in its original packaging.
Return procedure for AT24C02N-10SI-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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