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Microchip Technology AT34C02-10PI-1.8
- Part No.:
- AT34C02-10PI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT34C02-10PI-1.8.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,145
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Product details
Overview
AT34C02-10PI-1.8 from Atmel (now Microchip) 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-used in industrial sensor calibration storage, embedded configuration memory, and power-management parameter retention.
For engineers reviewing the AT34C02-10PI-1.8 datasheet, AT34C02-10PI-1.8 pinout, AT34C02-10PI-1.8 application, or AT34C02-10PI-1.8 equivalent, key selection considerations include low-voltage 1.8V operation, dual write-protection modes (software + hardware), 100 kHz I²C speed at 1.8V, 1M endurance cycles, and PDIP-8 packaging for through-hole prototyping and legacy industrial PCBs.
Technical Context
The AT34C02-10PI-1.8 implements a true 2-wire (I²C) serial interface with open-drain SDA and edge-triggered SCL, supporting standard-mode timing (100 kHz max at 1.8V). Its internal architecture includes an 8-bit address counter, page-addressable EEPROM array organized as 16 pages × 16 bytes, and dedicated write-protect logic 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 enables conditional write access based on software register state. The device uses internal high-voltage pump and timing circuitry to execute self-timed 5 ms write cycles without external delay requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 words × 8 bits); supports byte- and page-write with automatic address increment within 16-byte boundaries |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic families and mixed-voltage systems without level shifters |
| I²C Clock Frequency | 100 kHz maximum at 1.8V - defines minimum SCL period (10 µs) and ensures reliable communication in low-power embedded hosts |
| Write Endurance | 1 million write cycles - guarantees long-term field reliability for firmware parameter logging and calibration updates |
| Data Retention | 100 years at +25°C - ensures nonvolatile storage integrity across product lifecycles without refresh |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments including factory automation and outdoor metering |
| Package | 8-lead PDIP (0.300" wide) - provides robust through-hole mounting, manual soldering compatibility, and socket-based test/programming support |
Pinout & Package
AT34C02-10PI-1.8 is housed in an 8-lead Plastic Dual Inline Package (PDIP), 0.300" wide body, with standard through-hole footprint and JEDEC MS-001 BA compliance. Pin 1 is marked by notch or dot; leads are gull-wing shaped with 0.100" pitch.
| 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 to 111 sets unique 3-bit slave address prefix |
| SDA | Serial Data I/O | Open-drain bidirectional line for data transfer; requires external pull-up resistor; supports wire-OR with other I²C devices |
| SCL | Serial Clock Input | Positive-edge clock input controlling data sampling; negative edge used for data output timing; must be driven by master only |
| WP | Hardware Write Protect | Active-high enable for full-array write lock; VCC = protect entire 2K; GND/floating = enable software-controlled protection mode |
| VCC | Power Supply | Primary supply rail (1.8V–5.5V); powers internal logic, EEPROM array, and high-voltage pump during write operations |
| GND | Ground Reference | System ground return path; required for proper biasing of internal circuitry and noise immunity of SDA/SCL inputs |
Key Features
| Feature | Design Value |
|---|---|
| Permanent Software Write Protection | Irreversible lock on first 1K (00H–7FH) via 0110 control code; prevents accidental or malicious overwrite of critical calibration data |
| Hardware Write Protect (WP Pin) | Full-array protection activated by tying WP to VCC; independent of software state - ideal for factory programming lock-down |
| 16-byte Page Write Mode | Reduces I²C transaction overhead by allowing up to 16 bytes per stop condition; improves firmware update efficiency vs. byte-by-byte writes |
| Schmitt Trigger & Filtered Inputs | Suppresses EMI-induced glitches on SDA/SCL; eliminates need for external RC filtering in noisy industrial enclosures |
| Self-timed Write Cycle | Fixed 5 ms internal erase/write completion; removes requirement for host MCU to poll status or manage variable timing margins |
| Low Standby Current | 0.6 µA typical at 1.8V - extends battery life in always-on IoT nodes and portable instrumentation |
Applications
| Industrial Sensor Calibration Storage | Embedded Configuration Memory |
|---|---|
Use Scenario: Storing temperature-compensation coefficients and offset values for analog sensor modules operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding factory-trimmed parameters; accessed during system boot and periodic recalibration. Use Value: Enables field-deployable sensors to retain calibrated accuracy over 100-year data retention and withstand 1M rewrites during maintenance cycles. |
Use Scenario: Holding user-defined settings (e.g., display brightness, network timeout, language preference) in medical handheld devices. IC Role / Device Role / Timing Role: Persistent parameter store accessed via I²C during UI initialization and setting changes; isolated from main MCU flash wear. Use Value: Prevents loss of user preferences after battery removal or brownout, leveraging 1.8V operation to interface directly with ultra-low-power microcontrollers. |
| Power Management Parameter Retention | Firmware Bootloader Configuration |
Use Scenario: Recording last-known state (e.g., fault history, thermal shutdown count, charge cycle log) in smart battery packs. IC Role / Device Role / Timing Role: Dedicated event logger with hardware WP pin permanently tied to VCC to prevent runtime corruption during voltage transients. Use Value: Guarantees forensic data integrity under 125°C junction conditions and 1.8V brownout - meeting IEC 62368-1 safety-critical logging requirements. |
Use Scenario: Storing secure boot flags, firmware version locks, and cryptographic key indices in industrial gateways with dual-boot capability. IC Role / Device Role / Timing Role: Trusted configuration vault accessed early in boot sequence; software write protection secures first-half (00H–7FH) containing immutable security tokens. Use Value: Supports secure OTA updates by preventing unauthorized modification of bootloader policy registers while allowing field-serviceable parameter updates in second-half pages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Microchip 24AA02E48 | 2 Kbit I²C EEPROM with integrated EUI-48 MAC address; operates 1.7V–5.5V; same 100 kHz @ 1.8V; no software write protect | Lacks permanent software lock; relies solely on WP pin and external security for MAC storage | Select when MAC address persistence is required and software-level array partitioning is unnecessary |
| ON Semiconductor CAT24C02 | 2 Kbit I²C EEPROM; 1.8V–6.0V range; 400 kHz @ 2.5V+; no software write protect; identical PDIP-8 pinout | Higher max clock speed above 2.5V but no irreversible first-half lock; different WP behavior (only hardware) | Choose for cost-sensitive designs needing higher-speed writes above 2.5V and simpler protection scheme |
Compared with AT34C02-10PI-1.8, the 24AA02E48 adds MAC address functionality at the expense of software write protection, while the CAT24C02 offers broader voltage tolerance and faster timing above 2.5V but omits the irreversible 1K lock - making AT34C02-10PI-1.8 uniquely suited for applications requiring tamper-resistant calibration storage in 1.8V systems.
Availability
AT34C02-10PI-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration storage, embedded configuration memory, and power-management parameter retention requiring stable component supply, long-lifecycle support, and through-hole assembly compatibility.
Supply support for AT34C02-10PI-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 (formerly Atmel) is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions for industrial, automotive, and consumer markets.
The AT34C02 product line delivers cost-optimized, low-voltage serial EEPROMs designed for reliable parameter storage in space-constrained and power-sensitive embedded systems - emphasizing write protection integrity and extended temperature operation.
FAQ
What is the minimum operating voltage for AT34C02-10PI-1.8?
The AT34C02-10PI-1.8 is rated for 1.8V to 5.5V operation. Its guaranteed functionality begins at exactly 1.8V, with full AC and DC specifications validated down to this threshold - enabling direct integration with 1.8V FPGA I/O banks and ultra-low-power MCUs without level-shifting circuitry.
How does software write protection work on AT34C02-10PI-1.8?
Software write protection on AT34C02-10PI-1.8 is enabled by sending a special 0110 control code to program the write-protect register, permanently locking addresses 00H–7FH. Once set, this protection cannot be reversed - even after power cycling - ensuring calibration data remains immutable throughout the device's lifetime.
Can AT34C02-10PI-1.8 operate at 100 kHz I²C speed with 1.8V supply?
Yes, AT34C02-10PI-1.8 is fully specified for 100 kHz I²C operation at 1.8V supply. Its AC characteristics table explicitly lists tLOW = 4.7 µs and tHIGH = 4.0 µs minima at 1.8V, confirming reliable timing margin for standard-mode I²C controllers in low-voltage systems.
What package type is used for AT34C02-10PI-1.8?
AT34C02-10PI-1.8 uses an 8-lead Plastic Dual Inline Package (PDIP) with 0.300" body width and JEDEC MS-001 BA compliance. This through-hole package supports manual prototyping, socket-based programming, and legacy industrial PCB assembly where surface-mount alternatives are unsuitable.
Is hardware write protection active by default on AT34C02-10PI-1.8?
No - hardware write protection on AT34C02-10PI-1.8 is disabled by default. The WP pin must be actively tied to VCC to enable full-array protection. When left floating or grounded, the device permits normal read/write operations unless software write protection has been previously programmed.
AT34C02-10PI-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT34C02-10PI-1.8 FAQ
1.How can I place an order for AT34C02-10PI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT34C02-10PI-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 AT34C02-10PI-1.8 reliable?
The price and inventory of AT34C02-10PI-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 AT34C02-10PI-1.8 is usually 5 days.
3.What payment methods are accepted for AT34C02-10PI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT34C02-10PI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT34C02-10PI-1.8?
AT34C02-10PI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT34C02-10PI-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 AT34C02-10PI-1.8?
For technical support, including AT34C02-10PI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT34C02-10PI-1.8 requirements.
6.How does Aetrix verify that AT34C02-10PI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT34C02-10PI-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 AT34C02-10PI-1.8 meets industry standards.
7.What is the process for return or replacement of AT34C02-10PI-1.8?
All AT34C02-10PI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT34C02-10PI-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 AT34C02-10PI-1.8 part is unused and in its original packaging.
Return procedure for AT34C02-10PI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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