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Microchip Technology AT34C02-10TI-2.7
- Part No.:
- AT34C02-10TI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT34C02-10TI-2.7.pdf
- Description:
- IC EEPROM 2KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,136
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Product details
Overview
AT34C02-10TI-2.7 from Atmel (now Microchip) is a 2 Kbit (256 × 8) I²C-compatible serial EEPROM with permanent software write protection for the first 1K bits (00H–7FH), hardware write protection via WP pin, and operation across 2.7V to 5.5V supply. It supports 400 kHz I²C clock at 2.7V/5.0V, features 16-byte page writes, 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 parameters.
For engineers reviewing the AT34C02-10TI-2.7 datasheet, AT34C02-10TI-2.7 pinout, AT34C02-10TI-2.7 application, or AT34C02-10TI-2.7 equivalent, key selection considerations include its dual write-protection architecture, TSSOP-8 packaging, -40°C to +85°C industrial temperature range, 1.8V/2.7V voltage variants, and compatibility with microcontroller-based I²C bus systems requiring nonvolatile parameter storage.
Technical Context
The AT34C02-10TI-2.7 implements a two-wire (I²C) serial interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain SDA output. Its internal architecture includes an 8-bit address counter, X/Y decoders, serial control logic, and dedicated write-protect circuitry that enforces irreversible software lock on addresses 00H–7FH when programmed with control code 0110.
Hardware write protection is managed by 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 acknowledge polling for completion detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 words × 8 bits), organized as 16 pages of 16 bytes each - enables efficient block-level updates without full-array erasure. |
| Supply Voltage Range | 2.7V to 5.5V - supports direct interfacing with 3.3V and 5V microcontrollers without level-shifting. |
| I²C Clock Frequency | Up to 400 kHz at 2.7V/5.0V - allows faster parameter loading than 100 kHz legacy mode while maintaining timing margin. |
| Write Endurance | 1 million write cycles - ensures reliable field recalibration or logging over product lifetime in industrial equipment. |
| Data Retention | 100 years at +25°C - guarantees long-term integrity of stored calibration coefficients and security keys. |
| Operating Temperature | -40°C to +85°C - qualified for use in automotive body control modules and factory automation PLCs. |
| Write Cycle Time | 5 ms maximum - defines minimum interval between successive write commands; impacts real-time update latency. |
Pinout & Package
AT34C02-10TI-2.7 is housed in an 8-lead Thin Shrink Small Outline Package (TSSOP), 3.00 mm × 4.4 mm body, lead-free, compliant with JEDEC MO-153 Variation AA. Pin 1 is marked by a corner notch or dot.
| 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 is MSB, A0 is LSB. |
| SDA | Serial Data I/O | Bidirectional open-drain line shared across I²C bus; requires external pull-up resistor (typically 2.2–10 kΩ). |
| SCL | Serial Clock Input | Positive-edge sampled clock input; controls timing of data sampling and ACK generation during transfers. |
| WP | Hardware Write Protect | Active-high enable: tie to VCC to lock entire 2K array; tie to GND/floating to allow writes per software protection state. |
| VCC | Power Supply | Primary supply input (2.7V–5.5V); powers internal logic, EEPROM array, and high-voltage pump for write operations. |
| GND | Ground Reference | System ground return path; must be low-impedance and co-located with microcontroller ground for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Permanent Software Write Protection | Irreversible lock on first 1K bits (00H–7FH) via 0110 control code - prevents accidental or malicious overwrite of critical boot parameters. |
| Hardware Write Protection | WP pin enables full-array lock independent of software state - supports secure manufacturing programming and field lockdown. |
| 16-byte Page Write Mode | Reduces I²C transaction overhead vs. byte writes; allows burst storage of sensor calibration tables or configuration blocks. |
| Schmitt Trigger & Noise Filtering | Input hysteresis and digital filtering on SDA/SCL suppress EMI-induced glitches - improves reliability in electrically noisy industrial environments. |
| Low Standby Current | 1.6 µA typical at 2.7V - minimizes power draw in battery-backed or energy-harvesting applications during idle periods. |
Applications
| Industrial Sensor Calibration | Automotive Body Control Module |
|---|---|
Use Scenario: Storing temperature-compensated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage IC providing persistent memory for runtime-critical calibration data accessed at system startup. Use Value: Enables field recalibration without firmware reflash; software write protection prevents corruption of factory-set coefficients during routine diagnostics. |
Use Scenario: Holding seat position memory, mirror angle presets, and lighting configuration profiles in vehicle door modules. IC Role / Device Role / Timing Role: Serial EEPROM interfaced to 8-bit MCU via I²C for user preference persistence across ignition cycles. Use Value: WP pin hardwired to VCC during final assembly locks configuration space against unintended changes during service or CAN diagnostics. |
| Medical Device Configuration | Smart Energy Metering |
Use Scenario: Retaining regulatory-compliant operational limits, alarm thresholds, and audit log pointers in portable diagnostic instruments. IC Role / Device Role / Timing Role: Secure configuration storage element supporting traceable parameter history and tamper-resistant settings. Use Value: Permanent software protection ensures FDA-mandated safety thresholds remain unaltered post-certification; 100-year retention meets medical device lifecycle requirements. |
Use Scenario: Logging tariff schedules, metering constants, and firmware version stamps in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: Low-power serial memory synchronized to metrology MCU's I²C bus for time-stamped event storage. Use Value: 1M endurance supports daily tariff updates over 27 years; 2.7V operation ensures compatibility with supercapacitor backup power during mains failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95256-DW | 256 Kbit SPI interface, 5V-only (4.5V–5.5V), no software write protection, 5 ms write cycle | Lacks dual write-protection scheme; requires SPI host instead of I²C | Select when higher density and SPI-native host exist; not drop-in for I²C or protection-critical designs. |
| 24AA02E48 | 2 Kbit I²C EEPROM with embedded EUI-48 MAC address, 1.8V–5.5V, hardware WP only, 5 ms write cycle | Includes factory-programmed unique ID; no software write protection capability | Choose for networked devices needing MAC identity; unsuitable where irreversible first-half locking is required. |
Compared with M95256-DW and 24AA02E48, AT34C02-10TI-2.7 uniquely combines I²C compatibility, permanent software write protection for half-array, and hardware WP pin-making it optimal for industrial systems requiring layered, irreversible data integrity assurance without changing bus architecture.
Availability
AT34C02-10TI-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical device configuration, and smart energy metering requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for AT34C02-10TI-2.7 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 (formerly Atmel) is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions for industrial, automotive, and consumer applications.
The AT34C02 product line was designed for cost-sensitive, space-constrained embedded systems requiring robust, low-voltage serial EEPROM with configurable write protection - targeting industrial control, automotive subsystems, and medical instrumentation.
FAQ
What is the package type and footprint of AT34C02-10TI-2.7?
AT34C02-10TI-2.7 uses an 8-lead TSSOP (Thin Shrink Small Outline Package) with 3.00 mm × 4.4 mm body size, 0.65 mm lead pitch, and JEDEC MO-153 Variation AA compliance. Its footprint matches standard 8-pin TSSOP land patterns and is compatible with automated SMT assembly. The "TI" in the part number explicitly denotes the TSSOP package variant.
How does software write protection work on AT34C02-10TI-2.7?
Software write protection on AT34C02-10TI-2.7 is enabled by sending a special command with device address 0110 (instead of normal 1010) while WP is grounded or floating. Once programmed, it permanently locks addresses 00H–7FH (first 1K bits); this state persists through power cycles and cannot be reversed. AT34C02-10TI-2.7 will not acknowledge further 0110 commands after activation.
Can AT34C02-10TI-2.7 operate at 1.8V?
No - AT34C02-10TI-2.7 is the 2.7V version, specified for 2.7V to 5.5V operation. For 1.8V operation, the correct variant is AT34C02-10TI-1.8. Using AT34C02-10TI-2.7 below 2.7V may result in unreliable I²C communication, failed writes, or undefined behavior due to insufficient internal voltage margin for the EEPROM pump circuit.
What is the maximum I²C clock frequency supported by AT34C02-10TI-2.7?
AT34C02-10TI-2.7 supports up to 400 kHz I²C clock frequency when operated at 2.7V or 5.0V. At 1.8V, the maximum is 100 kHz - but since AT34C02-10TI-2.7 is rated only for 2.7V–5.5V, its guaranteed high-speed operation is strictly 400 kHz. This enables faster parameter loading in time-critical boot sequences.
Does AT34C02-10TI-2.7 support page write operations?
Yes - AT34C02-10TI-2.7 supports 16-byte page write mode, allowing up to 16 sequential bytes to be written in a single I²C transaction. This reduces bus overhead versus individual byte writes and accelerates bulk updates such as calibration tables. Partial page writes are also permitted, and address roll-over wraps within the same page boundary.
AT34C02-10TI-2.7 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:
- 10ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
AT34C02-10TI-2.7 FAQ
1.How can I place an order for AT34C02-10TI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT34C02-10TI-2.7 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-2.7 reliable?
The price and inventory of AT34C02-10TI-2.7 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-2.7 is usually 5 days.
3.What payment methods are accepted for AT34C02-10TI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT34C02-10TI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT34C02-10TI-2.7?
AT34C02-10TI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT34C02-10TI-2.7 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-2.7?
For technical support, including AT34C02-10TI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT34C02-10TI-2.7 requirements.
6.How does Aetrix verify that AT34C02-10TI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT34C02-10TI-2.7 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-2.7 meets industry standards.
7.What is the process for return or replacement of AT34C02-10TI-2.7?
All AT34C02-10TI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT34C02-10TI-2.7, 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-2.7 part is unused and in its original packaging.
Return procedure for AT34C02-10TI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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