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Microchip Technology AT34C02-10PC-2.7
- Part No.:
- AT34C02-10PC-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT34C02-10PC-2.7.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,927
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Product details
Overview
AT34C02-10PC-2.7 from Microchip Technology (formerly Atmel) is a 2 Kbit (256 × 8) serial EEPROM with permanent software write protection for the first-half of memory (00H–7FH) and hardware write protection via the WP pin. It operates from 2.7V to 5.5V, supports 400 kHz I²C communication at 2.7V+, delivers 16-byte page writes, and features 1 million write cycles with 100-year data retention. It is used in industrial control modules for storing calibration constants and configuration parameters.
For engineers reviewing the AT34C02-10PC-2.7 datasheet, AT34C02-10PC-2.7 pinout, AT34C02-10PC-2.7 application, or AT34C02-10PC-2.7 equivalent, this page provides verified pin functions, voltage-specific timing compliance, write-protection behavior under VCC/WP states, endurance and retention metrics, and validated alternatives for low-voltage embedded systems requiring nonvolatile parameter storage.
Technical Context
The AT34C02-10PC-2.7 implements a two-wire (I²C-compatible) serial interface with Schmitt-triggered, noise-filtered SDA and SCL inputs. Its internal architecture includes an 8-bit address counter, page-addressable EEPROM array, and dual-layer write protection logic-software-programmable register (irreversible) and hardware-controlled WP pin.
It uses open-drain bidirectional SDA with wire-OR capability, supports current-address, random-address, and sequential read modes, and enforces tWR = 10 ms max self-timed write cycles. Device addressing uses fixed 1010 prefix plus A2–A0 pins, enabling up to eight devices on one bus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8), organized as 256 addressable bytes - enables compact configuration storage without external address latching. |
| Supply Voltage Range | 2.7V to 5.5V - supports direct interfacing with 3.3V microcontrollers and mixed-voltage systems without level shifters. |
| I²C Clock Frequency | 400 kHz (at ≥2.7V) - allows high-speed parameter updates during system initialization or field reconfiguration. |
| Write Cycle Time | 10 ms maximum - defines minimum interval between successive write commands; impacts firmware retry logic and timeout design. |
| Endurance | 1 million write cycles - ensures reliable operation over 10+ years in daily-calibrated industrial sensors or metering devices. |
| Data Retention | 100 years at +25°C - guarantees long-term integrity of factory-trimmed coefficients and security keys across product lifecycle. |
| ESD Protection | >3,000V HBM - reduces need for external TVS diodes in board-level ESD-prone environments like HVAC controllers. |
Pinout & Package
AT34C02-10PC-2.7 is supplied in an 8-pin PDIP (package code 8P3), with 0.300" body width and through-hole mounting. Pin 1 is marked by notch or dot; pin numbering follows standard DIP convention (counterclockwise from top-left).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hard-wired address bits enabling up to eight AT34C02-10PC-2.7 devices on one I²C bus; no pull-up/down required unless shared with other I²C slaves. |
| SDA | Serial Data I/O | Bidirectional open-drain line - requires external pull-up resistor (typically 2.2–10 kΩ) compatible with VCC and bus capacitance. |
| SCL | Serial Clock Input | Master-generated clock; Schmitt trigger input ensures robust timing margin against slow-rising or noisy clock edges. |
| WP | Hardware Write Protect | Active-high protection: tied to VCC → full-array lock; grounded/floating → protection determined by software register state. |
| VCC | Power Supply | 2.7–5.5V input; decoupling capacitor (0.1 µF ceramic) recommended within 5 mm of pin for stable I²C operation. |
| GND | Ground Reference | System common return; must be low-impedance path to minimize noise coupling into SDA/SCL lines. |
Key Features
| Feature | Design Value |
|---|---|
| Permanent Software Write Protection | Irreversibly locks addresses 00H–7FH after programming - prevents accidental overwrites of critical calibration data during firmware updates. |
| Hardware Write Protection via WP Pin | Enables runtime full-array lock by connecting WP to VCC - useful for secure boot sequences or factory programming lockout. |
| 16-byte Page Write Mode | Reduces I²C transaction overhead when updating multi-byte parameters (e.g., sensor offset/gain tables) - cuts write time vs. byte-by-byte by ~85%. |
| Noise-Suppressed Inputs | Schmitt-trigger + filtering on SDA/SCL - eliminates false start/stop detection in electrically noisy industrial enclosures (e.g., motor drives). |
| Low Standby Current | ISB = 4 µA max at 2.7V - extends battery life in portable diagnostic tools or wireless sensor nodes operating in sleep mode. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing temperature-compensated gain/offset values in a thermocouple transmitter during factory calibration. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with irreversible first-half protection to preserve factory-set coefficients. Use Value: Prevents field tampering with calibrated values while allowing user-defined setup data (e.g., units, alarms) in unprotected second half (80H–FFH). | Use Scenario: Holding patient-specific therapy settings (e.g., infusion rate limits, alarm thresholds) in a portable insulin pump. IC Role / Device Role / Timing Role: Secure, low-power configuration memory accessed only during power-up or menu navigation. Use Value: 100-year retention ensures settings persist across device lifetime; 2.7V operation enables direct use with single-cell Li-ion supply (3.0–4.2V). |
| Automotive Body Control Module | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Saving seat/mirror position presets and lighting profiles in a vehicle BCM after user customization. IC Role / Device Role / Timing Role: I²C-configurable EEPROM interfaced to an 8-bit automotive MCU (e.g., PIC16F) Use Value: Hardware WP pin tied to ignition signal - disables writes when engine is running, preventing corruption during vibration-induced transients. | Use Scenario: Storing small firmware patches or tariff tables downloaded remotely to a utility meter via PLC or RF link. IC Role / Device Role / Timing Role: Low-voltage (2.7V) serial memory supporting 400 kHz I²C bursts for fast patch loading during maintenance windows. Use Value: 1M endurance allows daily patch updates for 2,700+ days; page-write mode minimizes communication time over constrained narrowband links. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95256-WMN6TP | 256 Kbit SPI interface; 5.5V max VCC; no software write protect; WP pin protects full array only. | Requires SPI host controller instead of I²C; lacks permanent first-half lock - unsuitable where calibration data must survive all future firmware revisions. | Select only if system already uses SPI peripherals and full-array protection suffices; verify layout accommodates SO-8 footprint (same as AT34C02-10PC-2.7 SOIC variant). |
| 24LC024T-I/OT | 2 Kbit I²C EEPROM; 1.8–5.5V range; software write protect supported but not permanent - can be cleared via command. | Allows field reset of protected region; lower ESD rating (2.5 kV HBM); same 400 kHz speed at 2.7V+. | Choose when recalibration or field updates to protected data are required; avoid where regulatory compliance mandates immutable factory calibration storage. |
Compared with M95256-WMN6TP and 24LC024T-I/OT, the AT34C02-10PC-2.7 uniquely combines irreversible software write protection for critical data, 2.7V I²C compatibility, and PDIP packaging - making it optimal for legacy industrial designs needing guaranteed calibration integrity and through-hole assembly.
Availability
AT34C02-10PC-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply and long-term obsolescence management.
Supply support for AT34C02-10PC-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 is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with a focus on reliability and long-term product support.
The AT34C02 series was designed for cost-sensitive, low-power embedded systems requiring robust nonvolatile storage - particularly in industrial, automotive, and medical applications where data integrity and voltage flexibility are critical.
FAQ
What is the maximum clock frequency supported by AT34C02-10PC-2.7?
The AT34C02-10PC-2.7 supports up to 400 kHz I²C clock frequency when operated at 2.7V or higher. At 1.8V (not applicable to this -2.7 variant), the maximum is reduced to 100 kHz. This timing is validated per AC characteristics in the official datasheet and reflects actual bus performance under load conditions with standard pull-up resistors.
Does AT34C02-10PC-2.7 support partial page writes?
Yes, AT34C02-10PC-2.7 supports partial page writes - meaning fewer than 16 bytes can be written in a single page-write transaction. The internal address counter increments automatically after each byte, wrapping within the 16-byte boundary. This feature simplifies firmware logic when updating variable-length configuration blocks without padding.
How does hardware write protection interact with software write protection on AT34C02-10PC-2.7?
When the WP pin is connected to VCC, AT34C02-10PC-2.7 enables full-array hardware write protection regardless of software register state - and simultaneously blocks programming of the software write protect register. If WP is grounded or floating, software protection (first-half only) takes effect if previously enabled, otherwise full read/write access is granted.
What package type is used for AT34C02-10PC-2.7?
AT34C02-10PC-2.7 uses an 8-pin PDIP (Plastic Dual Inline Package) with 0.300" width (package code 8P3). This through-hole package supports manual prototyping, wave soldering, and legacy PCB assemblies where surface-mount components are not feasible.
Can AT34C02-10PC-2.7 be used in automotive applications?
Yes, AT34C02-10PC-2.7 is rated for commercial temperature range (0°C to +70°C), but the AT34C02-10PI-2.7 variant (industrial grade, −40°C to +85°C) is qualified for under-hood automotive use. For cabin or infotainment modules within commercial temp limits, AT34C02-10PC-2.7 remains valid - confirm ambient thermal profile before deployment.
AT34C02-10PC-2.7 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:
- 2.7V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT34C02-10PC-2.7 FAQ
1.How can I place an order for AT34C02-10PC-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT34C02-10PC-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 AT34C02-10PC-2.7 reliable?
The price and inventory of AT34C02-10PC-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 AT34C02-10PC-2.7 is usually 5 days.
3.What payment methods are accepted for AT34C02-10PC-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT34C02-10PC-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT34C02-10PC-2.7?
AT34C02-10PC-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT34C02-10PC-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 AT34C02-10PC-2.7?
For technical support, including AT34C02-10PC-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT34C02-10PC-2.7 requirements.
6.How does Aetrix verify that AT34C02-10PC-2.7 is sourced from the original manufacturer or authorized distributors?
All AT34C02-10PC-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 AT34C02-10PC-2.7 meets industry standards.
7.What is the process for return or replacement of AT34C02-10PC-2.7?
All AT34C02-10PC-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT34C02-10PC-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 AT34C02-10PC-2.7 part is unused and in its original packaging.
Return procedure for AT34C02-10PC-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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