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

Microchip Technology AT34C02-10TU-1.8

Name: AT34C02-10TU-1.8
Brand: Microchip Technology
SKU: AT34C02-10TU-1.8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AT34C02-10TU-1.8

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 8-TSSOP (0.173", 4.40mm Width)

Datasheet:: AT34C02-10TU-1.8.pdf

Description:: IC EEPROM 2KBIT I2C 8TSSOP

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Product details

Overview

AT34C02-10TU-1.8 from Microchip Technology (formerly Atmel) is a 2 Kbit (256 × 8) serial EEPROM with permanent software write protection for the first 1K (00H–7FH), hardware write protection via WP pin, and 1.8V–5.5V operation. It features 2-wire I²C-compatible interface, 16-byte page write, Schmitt-trigger inputs, and automotive-grade reliability (1M write cycles, 100-year data retention). It is used in industrial sensor calibration storage, embedded system configuration memory, and power-constrained IoT node parameter retention.

For engineers reviewing the AT34C02-10TU-1.8 datasheet, AT34C02-10TU-1.8 pinout, AT34C02-10TU-1.8 application, or AT34C02-10TU-1.8 equivalent, key selection criteria include low-voltage 1.8V operation, dual write-protection modes (software + hardware), TSSOP-8 packaging, 100 kHz I²C speed at 1.8V, and extended temperature support (−40°C to +85°C).

Technical Context

The AT34C02-10TU-1.8 implements a true 2-wire serial interface compliant with I²C protocol timing at 100 kHz under 1.8V supply, with open-drain SDA and edge-triggered SCL. Its internal architecture includes an 8-bit address counter, Y/X decoders, serial control logic, and dedicated write protect circuitry that enforces irreversible software lock on addresses 00H–7FH when programmed.

Hardware write protection is implemented via the WP pin: tied to VCC it disables all writes to the full 2K array regardless of software protection status; tied to GND or floating, it permits writes unless software protection is active. The device supports byte and 16-byte page writes with self-timed 5 ms max write cycle and automatic address roll-over within pages.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	2048 bits (256 words × 8 bits), organized as 16 pages × 16 bytes - enables efficient block-level updates without full-array erase.
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 at 1.8V - ensures reliable communication in ultra-low-power applications where higher-speed clocks increase noise susceptibility.
Write Endurance	1 million write cycles - suitable for firmware parameter logging, calibration data updates, and field-serviceable configuration storage.
Data Retention	100 years at 25°C - guarantees long-term integrity of critical boot settings, security keys, or device identity data across product lifetime.
Operating Temperature	−40°C to +85°C - qualified for industrial automation, automotive body electronics, and outdoor-connected devices.
Write Protection	Permanent software lock on first 1K (00H–7FH) + hardware lock on full array via WP pin - provides layered security against accidental or malicious overwrites.

Pinout & Package

AT34C02-10TU-1.8 is housed in an 8-lead Thin Shrink Small Outline Package (TSSOP), 3.00 mm × 4.4 mm body, lead-free/halogen-free, JEDEC MO-153 compliant.

Pin/Terminal	Circuit Role	Design Meaning
A0–A2	Device Address Inputs	Hard-wired address bits enabling up to eight AT34C02 devices on one I²C bus; A2:A1:A0 = 000–111 sets unique 3-bit slave address.
SDA	Serial Data I/O	Open-drain bidirectional line for I²C data transfer; requires external pull-up; supports wire-OR with other open-drain devices.
SCL	Serial Clock Input	Positive-edge clock input for data sampling; negative-edge clock output for data release; defines I²C bus timing.
WP	Hardware Write Protect Control	Active-high enable: VCC = full-array lock; GND/floating = software-protection mode or normal operation.
VCC	Power Supply	1.8V–5.5V input; powers internal HV pump, timing, and logic; supports brown-out tolerant operation down to 1.8V.
GND	Ground Reference	System ground return path for all internal circuits and I/O; must be low-impedance to ensure noise immunity.

Key Features

Feature	Design Value
Permanent Software Write Protection	Irreversible lock on first 1K (00H–7FH) after programming - prevents corruption of factory-calibrated values or secure boot parameters.
Hardware Write Protection via WP Pin	Full-array lock when WP = VCC - enables system-level write disable during firmware updates or field servicing.
16-byte Page Write Mode	Reduces I²C transaction overhead by writing up to 16 bytes per stop condition - cuts write time vs. byte-by-byte by >80% for block updates.
Schmitt Trigger & Filtered Inputs	Suppresses EMI-induced glitches on SCL/SDA - eliminates spurious start/stop conditions in noisy industrial environments.
Self-timed Write Cycle (5 ms max)	Removes need for external write-complete polling delay - simplifies host firmware and improves deterministic timing behavior.
Low Standby Current (0.6 µA @ 1.8V)	Minimizes battery drain in always-on sensor nodes or energy-harvesting systems - extends operational life significantly.

Applications

Industrial Sensor Calibration Storage	Embedded System Configuration Memory
Use Scenario: Storing factory-trimmed offset/gain coefficients and temperature compensation tables for analog sensor front-ends in PLC modules. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed at power-up and during runtime recalibration; retains data across cold starts and brownouts. Use Value: Enables single-point calibration at manufacturing while supporting field recalibration without risking corruption of baseline values via software write protection.	Use Scenario: Holding user-defined network settings (IP, subnet, gateway), display brightness profiles, and language preferences in smart HVAC controllers. IC Role / Device Role / Timing Role: I²C-configurable persistent memory mapped into microcontroller's peripheral address space; updated only during setup or OTA configuration events. Use Value: Guarantees settings survive power loss and firmware upgrades; hardware WP pin allows locking during field deployment to prevent accidental reset.
IoT Node Parameter Retention	Automotive Body Control Module Settings
Use Scenario: Saving last-reported sensor state, wake-up interval, and BLE advertising channel map in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Ultra-low-power EEPROM interfaced directly to 1.8V MCU GPIOs; accessed infrequently but must retain data for >10 years. Use Value: 0.6 µA standby current and 100-year data retention meet stringent energy budget and lifecycle requirements for sealed IoT deployments.	Use Scenario: Storing seat position memory, mirror angle presets, and door lock behavior configurations in automotive interior modules. IC Role / Device Role / Timing Role: AEC-Q200–qualified nonvolatile memory operating across −40°C to +85°C; accessed during ignition-on initialization and driver profile recall. Use Value: Automotive-grade temperature range and 1M endurance support repeated personalization cycles over vehicle lifetime without wear-out risk.

Industrial Sensor Calibration Storage

Embedded System Configuration Memory

Use Scenario: Storing factory-trimmed offset/gain coefficients and temperature compensation tables for analog sensor front-ends in PLC modules.

IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed at power-up and during runtime recalibration; retains data across cold starts and brownouts.

Use Value: Enables single-point calibration at manufacturing while supporting field recalibration without risking corruption of baseline values via software write protection.

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

IC Role / Device Role / Timing Role: I²C-configurable persistent memory mapped into microcontroller's peripheral address space; updated only during setup or OTA configuration events.

Use Value: Guarantees settings survive power loss and firmware upgrades; hardware WP pin allows locking during field deployment to prevent accidental reset.

IoT Node Parameter Retention

Automotive Body Control Module Settings

Use Scenario: Saving last-reported sensor state, wake-up interval, and BLE advertising channel map in battery-powered environmental monitors.

IC Role / Device Role / Timing Role: Ultra-low-power EEPROM interfaced directly to 1.8V MCU GPIOs; accessed infrequently but must retain data for >10 years.

Use Value: 0.6 µA standby current and 100-year data retention meet stringent energy budget and lifecycle requirements for sealed IoT deployments.

Use Scenario: Storing seat position memory, mirror angle presets, and door lock behavior configurations in automotive interior modules.

IC Role / Device Role / Timing Role: AEC-Q200–qualified nonvolatile memory operating across −40°C to +85°C; accessed during ignition-on initialization and driver profile recall.

Use Value: Automotive-grade temperature range and 1M endurance support repeated personalization cycles over vehicle lifetime without wear-out risk.

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
M95M02-RMN6TP	2 Mbit SPI interface, 2.5–5.5V supply, no software write protection, 5 ms write cycle	Requires SPI host interface; lacks dual-mode write protection; higher density but incompatible protocol	Select when SPI is already used in system and higher capacity is needed; not drop-in for I²C designs.
24LC02BT-I/OT	2 Kbit I²C EEPROM, 2.5–5.5V, hardware WP only, 100 kHz @ 2.5V+, no software protection, SOT-23-5 package	Same memory size and I²C compatibility but missing permanent software lock; smaller footprint but no TSSOP-8 option	Choose for cost-sensitive, space-constrained designs where software protection is unnecessary and 2.5V+ operation suffices.

Compared with M95M02-RMN6TP and 24LC02BT-I/OT, the AT34C02-10TU-1.8 uniquely combines 1.8V operation, dual-layer write protection, and TSSOP-8 packaging - making it optimal for low-voltage industrial and automotive applications requiring robust data integrity.

Availability

AT34C02-10TU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration storage, embedded system configuration memory, and IoT node parameter retention requiring stable component supply, long-term lifecycle assurance, and lead-free/halogen-free compliance.

Supply support for AT34C02-10TU-1.8 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 AT34C02 series belongs to Microchip's legacy serial EEPROM product line, designed specifically for industrial and automotive applications demanding low-voltage operation, high endurance, and multi-layer data protection.

FAQ

What is the minimum operating voltage for AT34C02-10TU-1.8?

The AT34C02-10TU-1.8 operates down to 1.8V, with guaranteed functionality across the full 1.8V–5.5V range. At 1.8V, it supports I²C communication at 100 kHz and maintains full read/write capability, including software write protection programming and WP pin functionality. This makes AT34C02-10TU-1.8 suitable for direct integration with 1.8V logic families without level-shifting circuitry.

How does software write protection work on AT34C02-10TU-1.8?

Software write protection on AT34C02-10TU-1.8 is enabled by sending a special command (device address 0110) with WP pin grounded or floating. Once programmed, it permanently locks addresses 00H–7FH (first 1K) against writes - even after power cycles. The AT34C02-10TU-1.8 will not acknowledge further attempts to program this register, and no reversal mechanism exists. Hardware WP remains functional to lock the full array independently.

Is AT34C02-10TU-1.8 pin-compatible with other AT34C02 variants?

Yes, AT34C02-10TU-1.8 shares identical pinout and function mapping with all AT34C02 variants in TSSOP-8 (8A2) package, including AT34C02-10TU-2.7. Differences are limited to voltage rating (1.8V vs. 2.7V min), marking, and qualification - electrical pin behavior, address pins (A0–A2), SDA/SCL timing, and WP functionality remain fully consistent across the family.

What package type does AT34C02-10TU-1.8 use?

AT34C02-10TU-1.8 uses an 8-lead Thin Shrink Small Outline Package (TSSOP), designated as 8A2 per Microchip's ordering code. Its dimensions are 3.00 mm × 4.4 mm body, 0.65 mm lead pitch, and it is lead-free/halogen-free per RoHS Directive 2011/65/EU. The package includes standard pin 1 indicator and conforms to JEDEC MO-153, Variation AA.

Can AT34C02-10TU-1.8 be used in automotive applications?

AT34C02-10TU-1.8 is specified for industrial temperature range (−40°C to +85°C) and carries automotive-grade reliability qualifications including 1 million write cycles and 100-year data retention. While not AEC-Q200 certified out-of-box, its construction, test screening, and performance align with automotive body electronics requirements. For AEC-Q200 compliance, Microchip offers the AT34C02Y1-10YI-1.8 variant in MAP package - AT34C02-10TU-1.8 serves as a direct functional alternative in non-certified automotive subsystems.

AT34C02-10TU-1.8 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-TSSOP (0.173", 4.40mm 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:: 1.8V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-TSSOP

AT34C02-10TU-1.8 FAQ

1.How can I place an order for AT34C02-10TU-1.8 through Aetrix?

Please submit a Request for Quotation (RFQ) for AT34C02-10TU-1.8 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 AT34C02-10TU-1.8 reliable?

The price and inventory of AT34C02-10TU-1.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT34C02-10TU-1.8 is usually 5 days.

3.What payment methods are accepted for AT34C02-10TU-1.8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT34C02-10TU-1.8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT34C02-10TU-1.8?

AT34C02-10TU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT34C02-10TU-1.8 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 AT34C02-10TU-1.8?

For technical support, including AT34C02-10TU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT34C02-10TU-1.8 requirements.

6.How does Aetrix verify that AT34C02-10TU-1.8 is sourced from the original manufacturer or authorized distributors?

All AT34C02-10TU-1.8 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 AT34C02-10TU-1.8 meets industry standards.

7.What is the process for return or replacement of AT34C02-10TU-1.8?

All AT34C02-10TU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT34C02-10TU-1.8, 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 AT34C02-10TU-1.8 part is unused and in its original packaging.

Return procedure for AT34C02-10TU-1.8:

1.Submit a request within 90 days.

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

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