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Microchip Technology AT24C02N-10SI-1.8-T
- Part No.:
- AT24C02N-10SI-1.8-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C02N-10SI-1.8-T.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,726
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Product details
Overview
AT24C02N-10SI-1.8-T from Microchip Technology (formerly Atmel) is a 2K-bit (256 × 8) I²C-compatible serial EEPROM optimized for ultra-low-voltage embedded systems. It operates from 1.8V to 5.5V, supports 100 kHz I²C bus speed at 1.8V, features hardware write protection via WP pin, and delivers 1 million write cycles with 100-year data retention - used in battery-powered IoT sensors and industrial control modules for nonvolatile parameter storage.
For engineers reviewing the AT24C02N-10SI-1.8-T datasheet, AT24C02N-10SI-1.8-T pinout, AT24C02N-10SI-1.8-T application, or AT24C02N-10SI-1.8-T equivalent, key selection criteria include 1.8V minimum supply compatibility, 8-byte page write capability, SOIC-8 package footprint, and industrial temperature range (-40°C to +85°C) support.
Technical Context
The AT24C02N-10SI-1.8-T implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain bidirectional data transfer. Its internal address counter enables current-address, random-address, and sequential read modes without external addressing logic.
It uses hard-wired A0–A2 device address pins (all active for 2K configuration), supports up to eight devices on one bus, and enforces hardware write protection when WP = VCC - blocking all writes to the full 2K array while permitting reads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 words × 8 bits), organized as 32 pages of 8 bytes each - enables efficient byte- and page-level updates without full-array erasure. |
| Supply Voltage Range | 1.8V to 5.5V - supports direct interfacing with 1.8V logic families and mixed-voltage systems without level shifters. |
| I²C Clock Frequency | 100 kHz maximum at 1.8V - ensures reliable timing margin in low-power, noise-prone environments like portable instrumentation. |
| Write Cycle Time | 10 ms max - defines minimum interval between write commands; requires polling or timeout handling in firmware. |
| Endurance & Retention | 1 million write cycles / 100 years data retention - qualifies for long-life field deployments in utility meters and medical diagnostics. |
| Operating Temperature | -40°C to +85°C - certified for industrial-grade operation in factory automation and automotive body-control modules. |
| Standby Current | 3 µA max at 1.8V - minimizes quiescent power in always-on sensor nodes powered by coin cells or energy harvesters. |
Pinout & Package
AT24C02N-10SI-1.8-T is housed in an 8-lead JEDEC SOIC (8S1) package measuring 3.99 mm × 4.98 mm × 1.73 mm, with gull-wing leads and 1.27 mm pitch - compatible with standard reflow soldering and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hard-wired LSB of 3-bit device address; enables up to eight AT24C02N-10SI-1.8-T devices on shared I²C bus. |
| A1 | Device Address Input | Mid-bit of device address; must match physical PCB wiring to avoid bus contention during multi-device addressing. |
| A2 | Device Address Input | MSB of device address; determines unique I²C slave address (0x50–0x57) for this instance of AT24C02N-10SI-1.8-T. |
| GND | Ground Reference | Return path for all internal circuitry and I²C pull-up currents; requires low-impedance connection to system ground plane. |
| VCC | Power Supply | Accepts 1.8V–5.5V; decoupling capacitor (0.1 µF ceramic) required within 5 mm for stable 100 kHz I²C operation. |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC blocks all writes to entire 2K array; tied to GND enables normal read/write access. |
| SCL | Serial Clock Input | Open-drain input synchronized to master clock; requires external pull-up resistor (typically 2.2–10 kΩ) referenced to VCC. |
| SDA | Serial Data I/O | Open-drain bidirectional line; shares pull-up with SCL; supports wire-OR with other I²C peripherals on same bus segment. |
Key Features
| Feature | Design Value |
|---|---|
| 1.8V Operation Support | Guaranteed functionality down to 1.8V supply - eliminates need for voltage translators when interfacing with 1.8V microcontrollers (e.g., STM32L0, MSP430FRxx). |
| Hardware Write Protection | WP pin disables all write operations when driven high - prevents accidental firmware corruption during power-up/down or brown-out conditions. |
| 8-Byte Page Write | Allows burst programming of up to 8 consecutive bytes per I²C transaction - reduces bus overhead and improves write throughput vs. single-byte mode. |
| Noise-Suppressed Inputs | Schmitt-triggered SDA/SCL with 100 ns input filtering - rejects EMI and contact bounce in harsh industrial environments. |
| Industrial Temperature Range | Validated operation from -40°C to +85°C - meets extended thermal requirements for DIN-rail controllers and outdoor telemetry units. |
Applications
| Smart Energy Metering | Automotive Body Control |
|---|---|
Use Scenario: Storing tariff schedules, calibration coefficients, and tamper-event logs in residential electricity meters. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with infrequent writes and frequent reads; no real-time timing function. Use Value: 100-year data retention ensures meter accuracy over full product lifetime without battery-backed RAM. |
Use Scenario: Saving seat-position memory, mirror-angle presets, and door-lock configuration in entry-level vehicles. IC Role / Device Role / Timing Role: Persistent configuration storage accessed via vehicle's LIN/I²C gateway; no clock generation. Use Value: 1.8V operation allows direct connection to 1.8V CAN transceiver power domains, reducing BOM count. |
| Industrial Sensor Nodes | Medical Diagnostic Devices |
Use Scenario: Logging sensor calibration offsets and firmware update history in wireless vibration monitors deployed on rotating machinery. IC Role / Device Role / Timing Role: Field-programmable memory for device-specific calibration data; accessed only during commissioning or maintenance. Use Value: 1 million write cycles support repeated recalibration across 10+ years of service life under factory maintenance schedules. |
Use Scenario: Storing patient-specific therapy parameters and usage counters in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, nonvolatile storage for regulatory-critical settings; WP pin prevents runtime modification during therapy delivery. Use Value: Hardware write protection ensures FDA 21 CFR Part 11 compliance by physically blocking unauthorized parameter changes. |
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 capacity, SOIC-8, 1.8V–5.5V, but rated for 400 kHz at 1.8V (vs. 100 kHz for AT24C02N-10SI-1.8-T) | Enables faster firmware updates in host systems with high-speed I²C masters; otherwise identical use cases. | Select M24C02-RMN6TP if bus speed >100 kHz is required at 1.8V; verify timing margins with host controller. |
| Renesas R1EX24002ASAS0I | 2K EEPROM in SOIC-8, 1.7V–5.5V, 100 kHz at 1.7V, but lacks dedicated WP pin - write protection implemented via software lock bits only. | Requires firmware-level security implementation; unsuitable where hardware-enforced write blocking is mandated (e.g., safety-critical logging). | Choose R1EX24002ASAS0I only when WP pin is not required and lowest possible voltage (1.7V) is critical. |
Compared with AT24C02N-10SI-1.8-T, M24C02-RMN6TP offers higher I²C speed at 1.8V but shares identical package and endurance, while R1EX24002ASAS0I trades hardware WP for wider voltage headroom - making AT24C02N-10SI-1.8-T optimal for cost-sensitive industrial designs needing guaranteed hardware write lock.
Availability
AT24C02N-10SI-1.8-T is available at Aetrix Electronics and suitable for smart metering, automotive body electronics, and industrial sensor node designs requiring stable component supply across extended temperature and low-voltage operating conditions.
Supply support for AT24C02N-10SI-1.8-T 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 AT24C02N-10SI-1.8-T belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for low-power, low-voltage embedded systems requiring robust, field-programmable nonvolatile storage without battery backup.
FAQ
What is the maximum I²C clock frequency supported by AT24C02N-10SI-1.8-T at 1.8V?
The AT24C02N-10SI-1.8-T supports a maximum I²C clock frequency of 100 kHz when operated at 1.8V. This is specified in the AC Characteristics table under "2.7-, 2.5-, 1.8-volt" column for parameter fSCL. Higher frequencies (e.g., 400 kHz) are only guaranteed at VCC ≥ 2.7V.
Does AT24C02N-10SI-1.8-T require external pull-up resistors on SDA and SCL lines?
Yes, AT24C02N-10SI-1.8-T requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Typical values range from 2.2 kΩ to 10 kΩ, referenced to VCC, and must be selected based on bus capacitance and desired rise time per I²C specification.
How many devices can share the same I²C bus with AT24C02N-10SI-1.8-T?
Up to eight AT24C02N-10SI-1.8-T devices can coexist on a single I²C bus. This is enabled by the three hardware-configurable device address pins (A0, A1, A2), which generate unique 3-bit addresses (000–111), resulting in I²C slave addresses 0x50 through 0x57.
What happens when the WP pin of AT24C02N-10SI-1.8-T is connected to VCC?
When WP is connected to VCC, AT24C02N-10SI-1.8-T disables all write operations to its entire 2K memory array. Reads remain fully functional. This hardware lock prevents accidental or malicious overwrites during power transitions or firmware faults - a critical feature for calibration-critical systems.
Is AT24C02N-10SI-1.8-T compatible with standard JEDEC SOIC-8 footprints?
Yes, AT24C02N-10SI-1.8-T uses the 8-lead JEDEC SOIC (8S1) package with 1.27 mm lead pitch and 3.99 mm × 4.98 mm body dimensions - fully compliant with IPC-7351B SOIC-N-8 standards and compatible with industry-standard SOIC-8 PCB footprints and reflow profiles.
AT24C02N-10SI-1.8-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C02N-10SI-1.8-T FAQ
1.How can I place an order for AT24C02N-10SI-1.8-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C02N-10SI-1.8-T 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-1.8-T reliable?
The price and inventory of AT24C02N-10SI-1.8-T 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-1.8-T is usually 5 days.
3.What payment methods are accepted for AT24C02N-10SI-1.8-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C02N-10SI-1.8-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C02N-10SI-1.8-T?
AT24C02N-10SI-1.8-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C02N-10SI-1.8-T 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-1.8-T?
For technical support, including AT24C02N-10SI-1.8-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C02N-10SI-1.8-T requirements.
6.How does Aetrix verify that AT24C02N-10SI-1.8-T is sourced from the original manufacturer or authorized distributors?
All AT24C02N-10SI-1.8-T 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-1.8-T meets industry standards.
7.What is the process for return or replacement of AT24C02N-10SI-1.8-T?
All AT24C02N-10SI-1.8-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C02N-10SI-1.8-T, 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-1.8-T part is unused and in its original packaging.
Return procedure for AT24C02N-10SI-1.8-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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