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Microchip Technology AT34C02-10PC-1.8
- Part No.:
- AT34C02-10PC-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT34C02-10PC-1.8.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,680
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Product details
Overview
AT34C02-10PC-1.8 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), hardware write protection via WP pin, and 1.8 V to 5.5 V supply operation. It supports 100 kHz I²C-compatible communication, 16-byte page writes, and delivers 1 million write cycles with 100-year data retention in an 8-pin PDIP package. It is used in low-power industrial control systems for storing calibration data and configuration parameters.
For engineers reviewing the AT34C02-10PC-1.8 datasheet, AT34C02-10PC-1.8 pinout, AT34C02-10PC-1.8 application, or AT34C02-10PC-1.8 equivalent, key selection considerations include its 1.8 V minimum operating voltage, irreversible software write protect capability, WP-controlled full-array hardware lock, 10 ms max self-timed write cycle, and compatibility with standard 2-wire (I²C) bus timing at reduced voltage.
Technical Context
The AT34C02-10PC-1.8 implements a true 2-wire (I²C-compatible) interface with Schmitt-triggered, noise-filtered SDA and SCL inputs. Its internal architecture includes a programmable write protect register (irreversibly set via 0110 device address), independent hardware write protection controlled by the WP pin, and an auto-incrementing address counter supporting current-address, random-address, and sequential read modes.
It uses open-drain bidirectional SDA with external pull-up, positive-edge clocking on SCL, and supports acknowledge polling during write cycles. Memory is organized as 256 words × 8 bits, with page boundaries aligned every 16 bytes - enabling partial page writes and automatic address roll-over within each page during multi-byte transmission.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8), sufficient for firmware flags, sensor offsets, and small configuration tables |
| Supply Voltage Range | 1.8 V to 5.5 V - enables direct interfacing with 1.8 V logic without level shifters |
| I²C Clock Frequency | 100 kHz max at 1.8 V - ensures reliable timing margin under low-voltage conditions |
| Write Cycle Time | 10 ms max - defines minimum interval between write commands; impacts firmware write-loop design |
| Endurance | 1 million write cycles - supports frequent recalibration or logging in field-deployed equipment |
| Data Retention | 100 years at +25°C - guarantees long-term storage integrity without refresh |
| ESD Protection | >3,000 V HBM - enhances robustness in handling and board-level ESD events |
Pinout & Package
AT34C02-10PC-1.8 is housed in an 8-pin PDIP (package code 8P3), 0.300" wide, through-hole package suitable for prototyping and industrial PCBs requiring serviceability and thermal mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hard-wired inputs enabling up to eight AT34C02 devices on one I²C bus; A2:A1:A0 define LSBs of 7-bit slave address (1010xxx) |
| SDA | Serial Data I/O | Bidirectional open-drain line - requires external pull-up; shares bus with other I²C peripherals |
| SCL | Serial Clock Input | Master-generated clock; rising edge latches input data, falling edge drives output data |
| WP | Hardware Write Protect | Active-high control: tied to VCC locks entire array; GND/floating enables software-protection mode or full access |
| VCC | Power Supply | 1.8 V to 5.5 V tolerant; decoupling capacitor required near pin for noise immunity |
| GND | Ground Reference | Common return path for VCC and signal lines; must be low-impedance for stable I²C signaling |
Key Features
| Feature | Design Value |
|---|---|
| Permanent Software Write Protection | Irreversible lock of first 1Kbit (00H–7FH) after programming - prevents accidental overwrites of critical boot or calibration data |
| Hardware Write Protect (WP) | External pin enables full-array lock independent of software state - allows system-level write disable during power-up or fault conditions |
| 16-byte Page Write Mode | Reduces I²C transaction overhead vs. byte writes - improves efficiency when updating contiguous configuration blocks |
| Self-timed Write Cycle | No external timing control needed; microcontroller can poll ACK to detect completion - simplifies firmware integration |
| Schmitt Trigger & Noise Filtering | Rejects sub-100 ns glitches on SDA/SCL - increases reliability in electrically noisy industrial environments |
Applications
| Industrial Sensor Calibration | Medical Device Configuration Storage |
|---|---|
Use Scenario: Storing factory-calibrated gain/offset values for analog front-end sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed at power-on reset via I²C; write-protected after initial calibration. Use Value: Ensures consistent measurement accuracy across product lifetime without risk of field corruption due to software bugs or EMI-induced writes. | Use Scenario: Holding user-configurable alarm thresholds and operational modes in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure configuration EEPROM interfaced to ARM Cortex-M0+ MCU; write-protected during normal operation using WP pin. Use Value: Prevents unauthorized or transient changes to safety-critical settings while allowing updates during maintenance mode. |
| Automotive Body Control Module | Smart Energy Meter Firmware Flags |
Use Scenario: Saving seat/mirror position presets and lighting profiles in 12 V automotive systems with local 3.3 V/1.8 V regulation. IC Role / Device Role / Timing Role: Low-voltage EEPROM operating from 1.8 V rail; accessed during ignition-on initialization sequence. Use Value: Enables reliable storage in thermally stressed under-hood environments with extended temperature support (−40°C to +85°C). | Use Scenario: Recording tamper-detection flags, meter firmware version, and tariff schedule timestamps in utility-grade meters. IC Role / Device Role / Timing Role: Long-life data logger element; written infrequently but read on every power cycle. Use Value: 100-year retention and 1M endurance meet ANSI C12.20 and IEC 62056 requirements for metrology data integrity. |
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, 2.5–5.5 V operation, no software write protect; WP pin protects full array only | Requires SPI host interface instead of I²C; lacks irreversible half-array lock | Select when higher density and SPI-native host exist; avoid if software-level partitioned protection is mandatory |
| 24AA02E48-I/P | 2 Kbit I²C EEPROM with integrated EUI-48 MAC address; 1.8–5.5 V; software write protect limited to entire array | Includes factory-programmed unique ID; no per-half protection granularity | Choose when device identity management is needed alongside storage; not suitable for split-access memory schemes |
Compared with M95256-WMN6TP and 24AA02E48-I/P, the AT34C02-10PC-1.8 uniquely combines 1.8 V operation, I²C compatibility, and irreversible software-based half-array protection - making it optimal for systems requiring strict separation between field-updatable and factory-locked data regions.
Availability
AT34C02-10PC-1.8 is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and automotive subsystems requiring stable component supply, long-term data integrity, and low-voltage I²C interoperability.
Supply support for AT34C02-10PC-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 components, and nonvolatile memory solutions for industrial, automotive, and consumer applications.
The AT34C02 series was designed as a cost-effective, low-power serial EEPROM family targeting space-constrained embedded systems needing guaranteed data retention, flexible write protection, and broad voltage compatibility - especially where legacy 1.8 V logic coexists with mixed-supply designs.
FAQ
What is the minimum operating voltage for AT34C02-10PC-1.8?
The AT34C02-10PC-1.8 operates down to 1.8 V, as confirmed in its ordering code suffix "-1.8" and DC characteristics table. This enables direct connection to 1.8 V I/O domains without level translation, reducing BOM count and layout complexity in ultra-low-power designs.
Can the software write protection on AT34C02-10PC-1.8 be disabled after programming?
No - the software write protection on AT34C02-10PC-1.8 is permanent and irreversible once enabled. It locks the first 1Kbit (addresses 00H–7FH) indefinitely, even after power cycling. This behavior is explicitly documented in the Write Protection section and verified in the WP Register Status flow.
How does the WP pin affect write operations on AT34C02-10PC-1.8?
When the WP pin of AT34C02-10PC-1.8 is driven high (VCC), hardware write protection activates and blocks all write operations to the full 2 Kbit array - regardless of software protection status. When WP is low or floating, software protection governs access: unprogrammed = full write access; programmed = write allowed only to second half (80H–FFH).
What is the maximum I²C clock frequency supported by AT34C02-10PC-1.8?
The AT34C02-10PC-1.8 supports up to 100 kHz I²C clock frequency, as specified in its AC Characteristics table and ordering information. This limit applies specifically at 1.8 V operation; higher frequencies (up to 400 kHz) require ≥2.7 V supply, per the device's voltage-mode binning.
Does AT34C02-10PC-1.8 support page write operations, and what is the page size?
Yes - AT34C02-10PC-1.8 supports 16-byte page writes, meaning up to 16 contiguous bytes can be written in a single I²C transaction. This reduces bus overhead versus individual byte writes and is confirmed in both the Features list and Device Operation section of the datasheet.
AT34C02-10PC-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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT34C02-10PC-1.8 FAQ
1.How can I place an order for AT34C02-10PC-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT34C02-10PC-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 AT34C02-10PC-1.8 reliable?
The price and inventory of AT34C02-10PC-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 AT34C02-10PC-1.8 is usually 5 days.
3.What payment methods are accepted for AT34C02-10PC-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT34C02-10PC-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT34C02-10PC-1.8?
AT34C02-10PC-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT34C02-10PC-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 AT34C02-10PC-1.8?
For technical support, including AT34C02-10PC-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT34C02-10PC-1.8 requirements.
6.How does Aetrix verify that AT34C02-10PC-1.8 is sourced from the original manufacturer or authorized distributors?
All AT34C02-10PC-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 AT34C02-10PC-1.8 meets industry standards.
7.What is the process for return or replacement of AT34C02-10PC-1.8?
All AT34C02-10PC-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT34C02-10PC-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 AT34C02-10PC-1.8 part is unused and in its original packaging.
Return procedure for AT34C02-10PC-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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