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

Microchip Technology AT34C02-10TI-1.8-T

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

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Part No.:: AT34C02-10TI-1.8-T

Manufacturer:: Microchip Technology

Category:: Memory

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

Datasheet:: AT34C02-10TI-1.8-T.pdf

Description:: IC EEPROM 2KBIT I2C 8TSSOP

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Product details

Overview

AT34C02-10TI-1.8-T from Microchip Technology (formerly Atmel) is a 2 Kbit (256 × 8) I²C-compatible serial EEPROM with permanent software write protection for the first 1K bits (00H–7FH) and hardware write protection via the WP pin. It operates from 1.8 V to 5.5 V, supports 100 kHz I²C communication at 1.8 V, features 16-byte page write capability, and delivers 1 million write cycles with 100-year data retention. It is used in industrial control systems for storing calibration data, configuration settings, and firmware revision identifiers.

For engineers reviewing the AT34C02-10TI-1.8-T datasheet, AT34C02-10TI-1.8-T pinout, AT34C02-10TI-1.8-T application, or AT34C02-10TI-1.8-T equivalent, key selection considerations include its 1.8 V minimum supply, dual write-protection architecture, TSSOP-8 packaging, automotive-grade temperature range (−40°C to +85°C), and compatibility with microcontroller-based I²C bus systems requiring nonvolatile parameter storage.

Technical Context

The AT34C02-10TI-1.8-T implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA and SCL inputs. Its internal address counter supports current-address, random-address, and sequential read modes, and it uses an open-drain bidirectional SDA line compatible with standard I²C bus arbitration and clock stretching.

Write protection is implemented through both hardware (WP pin tied to VCC disables all writes) and irreversible software programming (0110 control code writes to a one-time-programmable register). The device enters self-timed 5 ms write cycles after valid STOP conditions, during which all inputs are ignored until completion.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	2048 bits (256 words × 8 bits); sufficient for small configuration tables, sensor calibration coefficients, or device ID storage.
Supply Voltage Range	1.8 V to 5.5 V; enables direct interfacing with 1.8 V logic families and mixed-voltage systems without level shifters.
I²C Clock Frequency	100 kHz at 1.8 V; ensures reliable timing margins in low-power embedded applications with limited slew rate.
Page Write Capacity	16 bytes per page; reduces I²C transaction overhead when updating contiguous configuration blocks.
Endurance & Retention	1 million write cycles / 100 years retention; meets long-life requirements for field-deployed industrial equipment.
Operating Temperature	−40°C to +85°C; qualified for industrial environments including motor drives, PLC modules, and power supplies.
Write Protection	Hardware (WP pin) + permanent software (00H–7FH only); allows selective locking of critical parameters while permitting runtime updates to user data.

Pinout & Package

AT34C02-10TI-1.8-T is housed in an 8-lead Thin Shrink Small Outline Package (TSSOP), 3.0 mm × 4.4 mm body, 0.65 mm pitch, lead-free and halogen-free compliant.

Pin/Terminal	Circuit Role	Design Meaning
A0–A2	Device Address Inputs	Hard-wired inputs enabling up to eight AT34C02 devices on a single I²C bus; A0–A2 define the three LSBs of the 7-bit slave address (1010xxx).
SDA	Serial Data Line	Bidirectional, open-drain I²C data line; requires external pull-up; supports multi-master arbitration and ACK/NACK signaling.
SCL	Serial Clock Input	Input-only I²C clock line; positive-edge sampling for input, negative-edge sampling for output; filtered for noise immunity.
WP	Hardware Write Protect	Active-high enable: tie to VCC to lock entire memory array; tie to GND or float to allow software-controlled protection mode selection.
VCC	Power Supply	Primary supply input (1.8 V–5.5 V); powers internal logic, EEPROM array, and high-voltage pump circuitry for write operations.
GND	Ground Reference	System ground return path; required for proper biasing of internal circuits and noise rejection on SDA/SCL lines.

Key Features

Feature	Design Value
Permanent Software Write Protection	Irreversible lock of first 1K bits (00H–7FH) via 0110 control byte; prevents accidental or malicious overwrite of factory-set parameters.
Hardware Write Protection	WP pin enables full-array lock independent of software state; simplifies system-level security by allowing board-level disable via trace cut or jumper.
Low-Voltage Operation	Guaranteed 100 kHz I²C operation down to 1.8 V; eliminates need for voltage translators in battery-powered or ultra-low-power designs.
16-Byte Page Write	Reduces I²C bus occupancy by up to 87% vs. byte-write for 16-byte updates; improves system responsiveness during configuration saves.
Schmitt-Trigger Inputs	Enhanced noise immunity on SDA/SCL pins; tolerates >100 ns of input noise without spurious edge detection in electrically noisy industrial environments.
Self-Timed Write Cycle	Fixed 5 ms internal erase/write sequence; removes timing burden from host MCU and guarantees completion before next command acceptance.

Applications

Industrial Sensor Calibration	Smart Meter Configuration Storage
Use Scenario: Storing temperature, offset, and gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter repository accessed during power-up initialization and periodic recalibration routines via I²C. Use Value: Enables field-replaceable sensor modules with unique calibration data preserved across power cycles and firmware updates.	Use Scenario: Holding tariff schedules, meter ID, pulse constants, and tamper-event logs in utility-grade electricity meters. IC Role / Device Role / Timing Role: Secure, write-protected configuration store accessed during boot and billing cycle transitions using I²C with WP pin hardwired to VCC. Use Value: Prevents unauthorized modification of billing parameters while allowing firmware to update usage counters and event timestamps.
Motor Drive Firmware Revision Tracking	Medical Device Usage Logging
Use Scenario: Recording firmware version, safety-critical calibration flags, and motor-specific tuning parameters in servo drive modules. IC Role / Device Role / Timing Role: Dual-zone protected memory: software-locked region stores immutable safety limits; unlocked region holds runtime-adjustable gains. Use Value: Supports ISO 13849-compliant functional safety by separating certified parameters from field-configurable values.	Use Scenario: Logging procedure counts, sterilization cycles, and operator IDs in portable diagnostic equipment with regulatory audit requirements. IC Role / Device Role / Timing Role: Tamper-evident nonvolatile log buffer written via I²C during shutdown; WP pin controlled by system security controller. Use Value: Meets FDA 21 CFR Part 11 requirements for secure, time-stamped, and unalterable device usage records.

Industrial Sensor Calibration

Smart Meter Configuration Storage

Use Scenario: Storing temperature, offset, and gain coefficients for analog sensor front-ends in programmable logic controllers.

IC Role / Device Role / Timing Role: Nonvolatile parameter repository accessed during power-up initialization and periodic recalibration routines via I²C.

Use Value: Enables field-replaceable sensor modules with unique calibration data preserved across power cycles and firmware updates.

Use Scenario: Holding tariff schedules, meter ID, pulse constants, and tamper-event logs in utility-grade electricity meters.

IC Role / Device Role / Timing Role: Secure, write-protected configuration store accessed during boot and billing cycle transitions using I²C with WP pin hardwired to VCC.

Use Value: Prevents unauthorized modification of billing parameters while allowing firmware to update usage counters and event timestamps.

Motor Drive Firmware Revision Tracking

Medical Device Usage Logging

Use Scenario: Recording firmware version, safety-critical calibration flags, and motor-specific tuning parameters in servo drive modules.

IC Role / Device Role / Timing Role: Dual-zone protected memory: software-locked region stores immutable safety limits; unlocked region holds runtime-adjustable gains.

Use Value: Supports ISO 13849-compliant functional safety by separating certified parameters from field-configurable values.

Use Scenario: Logging procedure counts, sterilization cycles, and operator IDs in portable diagnostic equipment with regulatory audit requirements.

IC Role / Device Role / Timing Role: Tamper-evident nonvolatile log buffer written via I²C during shutdown; WP pin controlled by system security controller.

Use Value: Meets FDA 21 CFR Part 11 requirements for secure, time-stamped, and unalterable device usage records.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
M95M02-RDW6TP/K	2 Mbit SPI interface, 2.5–5.5 V supply, no software write protect, 5 ms write cycle	Requires SPI host interface; lacks dual-mode protection; suited for higher-density logging where I²C bandwidth is insufficient	Select when migrating from I²C to SPI infrastructure or when >2 Kbit capacity is needed without bus contention concerns
24AA02E48-I/MS	2 Kbit I²C, 1.8–5.5 V, factory-programmed 48-bit MAC address, no software write protect, 5 ms write cycle	Includes EUI-48 identifier; hardware WP only; optimized for networked device identity rather than general-purpose parameter storage	Select when IEEE 802 MAC address persistence is required alongside configuration storage, and software protection is not mandatory

Compared with M95M02-RDW6TP/K and 24AA02E48-I/MS, the AT34C02-10TI-1.8-T uniquely combines 1.8 V I²C compatibility, irreversible software write protection, and TSSOP-8 packaging-making it optimal for space-constrained industrial controllers needing guaranteed immutability of critical startup parameters.

Availability

AT34C02-10TI-1.8-T is available at Aetrix Electronics and suitable for industrial automation, smart energy metering, and medical diagnostics equipment requiring stable component supply, extended temperature support, and long-term EEPROM reliability.

Supply support for AT34C02-10TI-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 embedded control and connectivity.

The AT34C02-10TI-1.8-T belongs to Microchip's legacy serial EEPROM product line, designed specifically for industrial and automotive applications demanding robust nonvolatile storage with flexible, layered write protection schemes.

FAQ

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

The AT34C02-10TI-1.8-T is rated for operation from 1.8 V to 5.5 V. Its 100 kHz I²C timing is fully guaranteed at 1.8 V, making it suitable for direct integration with 1.8 V microcontrollers and low-power sensor nodes without level-shifting circuitry. This specification is validated across the full −40°C to +85°C industrial temperature range.

How does hardware write protection work on AT34C02-10TI-1.8-T?

Hardware write protection on the AT34C02-10TI-1.8-T is controlled by the WP pin: when tied to VCC, the entire 2 Kbit array is locked against all write operations-including byte, page, and write-protect register commands. When WP is grounded or floating, hardware protection is inactive and software write protection status determines first-half array access. This behavior is confirmed in the device's Write Protection Modes table.

Can AT34C02-10TI-1.8-T be used in automotive applications?

Yes, the AT34C02-10TI-1.8-T is qualified for automotive-grade extended temperature operation (−40°C to +125°C) in specific variants; however, the -10TI-1.8-T suffix denotes industrial temperature range (−40°C to +85°C) in TSSOP-8 packaging. For under-hood automotive use, confirm qualification per AEC-Q100 stress testing by referencing Microchip's official automotive-grade ordering codes such as AT34C02-10TU-1.8.

What package type is used for AT34C02-10TI-1.8-T?

The AT34C02-10TI-1.8-T uses an 8-lead Thin Shrink Small Outline Package (TSSOP), designated as 8A2 per Microchip's packaging nomenclature. Its dimensions are 3.0 mm × 4.4 mm body size with 0.65 mm lead pitch, and it is lead-free and halogen-free compliant per JEDEC MO-153 standards.

Is software write protection reversible on AT34C02-10TI-1.8-T?

No, software write protection on the AT34C02-10TI-1.8-T is permanent and irreversible. Once the write-protect register is programmed using the 0110 control code (with WP pin low), the first 1K bits (00H–7FH) remain locked for the lifetime of the device-even after power cycling or reprogramming attempts. This behavior is explicitly documented in the "Software Write Protection" section of the datasheet.

AT34C02-10TI-1.8-T Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-TSSOP (0.173", 4.40mm 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:: 10ms

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

AT34C02-10TI-1.8-T FAQ

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

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

The price and inventory of AT34C02-10TI-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 AT34C02-10TI-1.8-T is usually 5 days.

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

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

Note: Certain payment methods may incur a processing fee.

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

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

Once your AT34C02-10TI-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 AT34C02-10TI-1.8-T?

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

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

All AT34C02-10TI-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 AT34C02-10TI-1.8-T meets industry standards.

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

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

Return procedure for AT34C02-10TI-1.8-T:

1.Submit a request within 90 days.

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

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