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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Microchip Technology AT24C02AN-10SU-1.8-T

Name: AT24C02AN-10SU-1.8-T
Brand: Microchip Technology
SKU: AT24C02AN-10SU-1.8-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AT24C02AN-10SU-1.8-T

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: AT24C02AN-10SU-1.8-T.pdf

Description:: IC EEPROM 2KBIT I2C 400KHZ 8SOIC

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Product details

Overview

AT24C02AN-10SU-1.8-T from Microchip Technology (formerly Atmel) is a 2 Kbit (256 × 8) two-wire serial EEPROM with 1.8 V to 5.5 V supply operation, 100 kHz clock rate at 1.8 V, 8-byte page write capability, and hardware write protection via the WP pin. It is used for nonvolatile parameter storage in low-power industrial sensor nodes, embedded control modules, and battery-backed configuration memory.

For engineers reviewing the AT24C02AN-10SU-1.8-T datasheet, AT24C02AN-10SU-1.8-T pinout, AT24C02AN-10SU-1.8-T application, or AT24C02AN-10SU-1.8-T equivalent, key selection considerations include its 1.8 V minimum operating voltage, automotive-grade temperature range (−40°C to +85°C), RoHS-compliant 8-lead SOIC package, and hardware-based write protection architecture.

Technical Context

The AT24C02AN-10SU-1.8-T implements a standard I²C-compatible two-wire interface with Schmitt-triggered, noise-filtered SDA and SCL inputs. It uses hardwired A0–A2 address pins to support up to eight devices on a shared bus and features an open-drain bidirectional SDA line requiring external pull-up.

Internal architecture includes 32 pages of 8 bytes each, self-timed 5 ms max write cycles, and a dedicated Write Protect (WP) pin that disables writes to the upper half (1K) of memory when pulled high. Standby current is as low as 0.6 µA at 1.8 V, enabling use in energy-constrained systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	2048 bits (256 × 8), organized in 32 pages of 8 bytes - enables compact firmware parameter storage with page-level write efficiency.
Supply Voltage Range	1.8 V to 5.5 V - supports direct interfacing with 1.8 V logic families and mixed-voltage systems without level shifters.
Max Clock Frequency	100 kHz at 1.8 V - ensures reliable I²C timing margin under low-voltage operation with standard microcontroller peripherals.
Write Cycle Time	5 ms maximum - defines minimum inter-write interval; critical for real-time logging or rapid configuration updates.
Endurance	1 million write cycles - guarantees long-term reliability in applications requiring frequent calibration or event logging.
Data Retention	100 years - ensures persistent storage integrity across product lifetime without refresh or backup power.
Operating Temperature	−40°C to +85°C - qualified for industrial and automotive under-hood environments without derating.
Standby Current	0.6 µA at 1.8 V - minimizes quiescent power draw in always-on battery-powered devices.

Pinout & Package

AT24C02AN-10SU-1.8-T is housed in an 8-lead JEDEC SOIC (8S1) package, 0.150" wide, lead-free and halogen-free per RoHS Directive.

Pin/Terminal	Circuit Role	Design Meaning
A0	Device Address Input	Hardwired address bit; sets LSB of 7-bit I²C device address (0x50–0x57) - enables multi-device bus topology.
A1	Device Address Input	Hardwired address bit; sets middle bit of device address - allows up to eight AT24C02AN-10SU-1.8-T units on one I²C bus.
A2	Device Address Input	Hardwired address bit; sets MSB of device address - required for bus arbitration and device selection.
GND	Ground Reference	Return path for all internal circuitry and I/O - must be low-impedance to ensure noise immunity during write cycles.
VCC	Power Supply	1.8 V to 5.5 V input; powers EEPROM core and interface logic - decoupling capacitor (0.1 µF) required near pin.
WP	Write Protect Control	Active-high hardware lock; disables writes to upper 1K when tied to VCC - prevents accidental firmware corruption during power-up/down.
SCL	Serial Clock Input	Positive-edge sampled clock for I²C protocol; requires external pull-up - determines maximum data throughput and timing compliance.
SDA	Serial Data I/O	Bidirectional, open-drain line; shared among multiple I²C devices - mandates external pull-up resistor (typically 2.2–10 kΩ).

Key Features

Feature	Design Value
Hardware Write Protection	WP pin disables writes to upper 1K memory block when asserted - eliminates need for software locks or CRC validation in safety-critical settings.
Low-Voltage Operation	Functional down to 1.8 V with full 100 kHz I²C speed - enables direct integration with ultra-low-power MCUs (e.g., ARM Cortex-M0+ at 1.8 V core).
Noise-Suppressed Inputs	Schmitt-trigger + filtering on SDA/SCL - rejects >100 ns glitches, improving robustness in electrically noisy industrial enclosures.
Page Write Capability	8-byte atomic page writes - reduces I²C transaction overhead by 8× vs. byte-wise writes, accelerating bulk configuration updates.
High Reliability	1M write cycles and 100-year data retention - validated for use in field-deployed equipment where replacement is impractical.

Applications

Industrial Sensor Calibration Storage	Embedded System Configuration Memory
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 register accessed during system boot and runtime recalibration. Use Value: Enables traceable, field-updatable calibration without requiring external MCU flash or battery-backed SRAM.	Use Scenario: Holding user-defined network settings (IP, subnet, gateway) and UI preferences in smart HVAC controllers. IC Role / Device Role / Timing Role: Persistent configuration store updated infrequently but read at every power-on reset. Use Value: Guarantees settings survive brownouts and firmware upgrades, reducing service calls and support costs.
Automotive Body Control Module (BCM)	Medical Device Usage Log
Use Scenario: Recording door lock actuation history and mirror position presets in 12 V automotive BCMs with 1.8 V domain controllers. IC Role / Device Role / Timing Role: Fault-tolerant event logger with WP-protected critical settings. Use Value: Meets AEC-Q100 stress requirements while supporting diagnostics and recall traceability.	Use Scenario: Capturing timestamped usage events (e.g., sterilization cycles, alarm triggers) in portable diagnostic instruments. IC Role / Device Role / Timing Role: Tamper-resistant audit trail storage with hardware write lock after final log commit. Use Value: Provides regulatory-compliant data integrity for FDA 21 CFR Part 11 and ISO 13485 documentation requirements.

Industrial Sensor Calibration Storage

Embedded System Configuration Memory

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 register accessed during system boot and runtime recalibration.

Use Value: Enables traceable, field-updatable calibration without requiring external MCU flash or battery-backed SRAM.

Use Scenario: Holding user-defined network settings (IP, subnet, gateway) and UI preferences in smart HVAC controllers.

IC Role / Device Role / Timing Role: Persistent configuration store updated infrequently but read at every power-on reset.

Use Value: Guarantees settings survive brownouts and firmware upgrades, reducing service calls and support costs.

Automotive Body Control Module (BCM)

Medical Device Usage Log

Use Scenario: Recording door lock actuation history and mirror position presets in 12 V automotive BCMs with 1.8 V domain controllers.

IC Role / Device Role / Timing Role: Fault-tolerant event logger with WP-protected critical settings.

Use Value: Meets AEC-Q100 stress requirements while supporting diagnostics and recall traceability.

Use Scenario: Capturing timestamped usage events (e.g., sterilization cycles, alarm triggers) in portable diagnostic instruments.

IC Role / Device Role / Timing Role: Tamper-resistant audit trail storage with hardware write lock after final log commit.

Use Value: Provides regulatory-compliant data integrity for FDA 21 CFR Part 11 and ISO 13485 documentation requirements.

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 2 Kbit size, 1.7–5.5 V range, but rated only to +105°C; no WP pin - relies on software lock or external logic for protection.	Lacks hardware write protection; requires firmware changes to emulate WP functionality.	Choose when extended temperature (>+85°C) is required and WP is managed in software.
ON Semiconductor CAT24C02HU4IGT3	Identical 2 Kbit, 1.8–5.5 V, 100 kHz @ 1.8 V, and WP pin; packaged in 8-lead TSSOP (8A2), not SOIC.	Different footprint - requires PCB layout change; otherwise functionally identical in electrical and timing behavior.	Choose when TSSOP packaging is preferred for space-constrained designs or thermal performance.

Compared with M24C02-RMN6TP and CAT24C02HU4IGT3, the AT24C02AN-10SU-1.8-T uniquely combines automotive-grade temperature range, hardware WP, and JEDEC SOIC compatibility - making it optimal for industrial control boards where drop-in replacement and proven field reliability are mandatory.

Availability

AT24C02AN-10SU-1.8-T is available at Aetrix Electronics and suitable for industrial sensor calibration storage, embedded system configuration memory, and automotive body control module applications requiring stable component supply across multi-year production cycles.

Supply support for AT24C02AN-10SU-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 devices, and memory solutions, with a focus on reliability, longevity, and embedded system integration.

The AT24C02AN-10SU-1.8-T belongs to Microchip's legacy AT24Cxx serial EEPROM product line, designed specifically for low-voltage, high-reliability nonvolatile data storage in industrial, automotive, and medical electronics.

FAQ

What is the minimum operating voltage for the AT24C02AN-10SU-1.8-T?

The AT24C02AN-10SU-1.8-T operates down to 1.8 V, as confirmed by its "−1.8" suffix and the DC characteristics table specifying VCC1 = 1.8 V minimum. This enables direct interface with 1.8 V I/O domains without level translation. The AT24C02AN-10SU-1.8-T maintains full functionality-including 100 kHz I²C speed and page write-at this voltage, unlike higher-voltage variants.

Does the AT24C02AN-10SU-1.8-T have hardware write protection?

Yes, the AT24C02AN-10SU-1.8-T includes a dedicated Write Protect (WP) pin that, when driven high, disables write access to the upper half (1K) of its 2K memory array. This hardware lock operates independently of software state and remains active during power transitions-critical for preventing corruption during brownout conditions. The AT24C02AN-10SU-1.8-T datasheet explicitly defines WP behavior in Table 2 and Section "WRITE PROTECT (WP)".

What package type is used for the AT24C02AN-10SU-1.8-T?

The AT24C02AN-10SU-1.8-T uses an 8-lead JEDEC SOIC (8S1) package, 0.150" wide, with lead-free and halogen-free construction indicated by the "U" suffix. Its mechanical dimensions conform to JEDEC MS-012, Variation AA, and it is compatible with standard SOIC reflow profiles. The AT24C02AN-10SU-1.8-T ordering code "SU" directly maps to this SOIC variant per the manufacturer's ordering information table.

What is the maximum clock frequency supported by the AT24C02AN-10SU-1.8-T at 1.8 V?

The AT24C02AN-10SU-1.8-T supports a maximum I²C clock frequency of 100 kHz when operated at 1.8 V, as specified in the "Features" section and Table 5 (AC Characteristics). This is lower than its 400 kHz rating at ≥2.5 V, reflecting timing margin constraints at reduced supply. The AT24C02AN-10SU-1.8-T maintains full read/write functionality-including page writes and acknowledge polling-at this rate.

How many devices can share the same I²C bus with the AT24C02AN-10SU-1.8-T?

Up to eight AT24C02AN-10SU-1.8-T devices can operate on a single I²C bus, enabled by three hardware address pins (A0, A1, A2) that configure the device's 7-bit I²C address (0x50–0x57). Each pin must be hardwired to VCC or GND; floating connections are undefined. This addressing scheme is identical across the AT24C02A family and verified in the "Device Addressing" section of the datasheet.

AT24C02AN-10SU-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

AT24C02AN-10SU-1.8-T FAQ

1.How can I place an order for AT24C02AN-10SU-1.8-T through Aetrix?

Please submit a Request for Quotation (RFQ) for AT24C02AN-10SU-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 AT24C02AN-10SU-1.8-T reliable?

The price and inventory of AT24C02AN-10SU-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 AT24C02AN-10SU-1.8-T is usually 5 days.

3.What payment methods are accepted for AT24C02AN-10SU-1.8-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C02AN-10SU-1.8-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT24C02AN-10SU-1.8-T?

AT24C02AN-10SU-1.8-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT24C02AN-10SU-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 AT24C02AN-10SU-1.8-T?

For technical support, including AT24C02AN-10SU-1.8-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C02AN-10SU-1.8-T requirements.

6.How does Aetrix verify that AT24C02AN-10SU-1.8-T is sourced from the original manufacturer or authorized distributors?

All AT24C02AN-10SU-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 AT24C02AN-10SU-1.8-T meets industry standards.

7.What is the process for return or replacement of AT24C02AN-10SU-1.8-T?

All AT24C02AN-10SU-1.8-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C02AN-10SU-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 AT24C02AN-10SU-1.8-T part is unused and in its original packaging.

Return procedure for AT24C02AN-10SU-1.8-T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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