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Microchip Technology AT24C02-10PU-1.8
- Part No.:
- AT24C02-10PU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C02-10PU-1.8.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,687
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Product details
Overview
AT24C02-10PU-1.8 from Microchip Technology is a 2-Kbit (256 × 8) two-wire serial EEPROM optimized for low-voltage embedded systems, supporting 1.8V to 5.5V operation, 100 kHz I²C interface speed at 1.8V, hardware write protection via WP pin, and 8-byte page write capability. It is commonly used in industrial sensor calibration storage, printer consumable identification, and power-management configuration retention.
For engineers reviewing the AT24C02-10PU-1.8 datasheet, AT24C02-10PU-1.8 pinout, AT24C02-10PU-1.8 application, or AT24C02-10PU-1.8 equivalent, key selection criteria include 1.8V minimum supply compatibility, 8-pin PDIP package footprint, I²C address flexibility (A0–A2), endurance of 1 million write cycles, and data retention of 100 years - all confirmed for this exact variant.
Technical Context
The AT24C02-10PU-1.8 implements a standard two-wire (I²C-compatible) serial interface with open-drain SDA and active-high SCL, using Schmitt-trigger inputs and internal noise filtering. Its memory array is organized as 256 words of 8 bits, addressed via an 8-bit device address followed by an 8-bit word address.
Write operations support both byte and 8-byte page modes, with self-timed internal write cycles completing in ≤5 ms. The WP pin enables hardware-level protection of the full 2K array when tied to VCC, while A0–A2 pins allow up to eight devices on a shared bus - all features explicitly specified for the AT24C02 (not just the broader family).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8), enabling compact nonvolatile storage for firmware flags, calibration coefficients, or device IDs without external address latches. |
| Supply Voltage Range | 1.8V to 5.5V - supports direct interfacing with 1.8V logic families and legacy 3.3V/5V systems without level shifters. |
| I²C Clock Frequency | 100 kHz max at 1.8V - ensures reliable timing margin in low-power microcontroller applications with limited drive strength. |
| Page Write Size | 8 bytes per page - reduces write transaction overhead compared to byte writes, improving update efficiency for small parameter sets. |
| Endurance & Retention | 1 million write cycles / 100 years data retention - validated for long-life deployments in industrial controllers and medical devices. |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient environments without derating or thermal management. |
| Write Protect Function | Hardware-enabled via WP pin - prevents accidental overwrites during power-up/down or firmware glitches without software intervention. |
Pinout & Package
AT24C02-10PU-1.8 uses an 8-lead JEDEC PDIP (8P3) package: 0.300" wide, through-hole mount, RoHS-compliant green plastic body with NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hard-wired LSB of 3-bit device address; enables up to eight AT24C02-10PU-1.8 devices on one I²C bus. |
| A1 | Device Address Input | Mid-bit of device address; must match physical PCB wiring to avoid bus conflicts in multi-device systems. |
| A2 | Device Address Input | MSB of device address; determines unique 7-bit I²C slave address (0x50–0x57 range) for this part. |
| GND | Ground Reference | Return path for VCC and signal currents; requires low-impedance connection to system ground plane. |
| VCC | Power Supply | 1.8V–5.5V input; decoupling capacitor (0.1 µF ceramic) required within 1 cm for stable I²C timing. |
| WP | Write Protect Control | Active-high enable: tied to VCC blocks all writes; tied to GND permits normal read/write access. |
| SCL | Serial Clock Input | Positive-edge clock for data transfer; requires external pull-up resistor (typically 2.2–10 kΩ) to VCC. |
| SDA | Serial Data I/O | Open-drain bidirectional line; shares pull-up with SCL; supports wire-OR with other I²C devices. |
Key Features
| Feature | Design Value |
|---|---|
| 1.8V Operation Support | Enables direct integration into ultra-low-power MCU subsystems (e.g., MSP430, STM32L0) without voltage translation. |
| Schmitt-Trigger Inputs | Improves noise immunity on SCL/SDA lines in electrically noisy industrial enclosures or motor-drive proximity. |
| 8-Byte Page Writes | Reduces I²C transaction count by up to 8× versus byte writes, lowering CPU overhead and bus occupancy time. |
| Hardware Write Protection | Eliminates need for software-based lock mechanisms, preventing corruption during brown-out or reset conditions. |
| 100-Year Data Retention | Validated for unattended field deployment in infrastructure monitoring nodes where battery replacement is impractical. |
Applications
| Industrial Sensor Calibration | Printer Cartridge Authentication |
|---|---|
|
Use Scenario: Storing temperature-compensation coefficients and factory calibration offsets in smart pressure transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during power-on initialization and periodic self-test routines. Use Value: Enables field-replaceable sensors to retain calibrated accuracy across 10+ years without recalibration service visits. |
Use Scenario: Authenticating OEM ink cartridges in laser printers by storing cryptographic keys and usage counters. IC Role / Device Role / Timing Role: Secure identity storage with write-protection enabled after initial programming to prevent tampering. Use Value: Prevents counterfeit cartridge use while supporting incremental counter updates during print jobs via 8-byte page writes. |
| Power Management Unit (PMU) Settings | Medical Device Configuration |
|
Use Scenario: Holding user-defined voltage rail sequencing delays and fault thresholds in programmable PMUs for FPGA-based systems. IC Role / Device Role / Timing Role: Persistent settings store updated during maintenance mode; read at boot to configure PMU registers. Use Value: Allows field-upgradable power policies without firmware reflash, reducing downtime in telecom base stations. |
Use Scenario: Saving patient-specific therapy parameters (e.g., infusion rate limits, alarm thresholds) in portable insulin pumps. IC Role / Device Role / Timing Role: Safety-critical configuration memory with 1M-cycle endurance to withstand frequent parameter adjustments. Use Value: Meets IEC 62304 Class B software requirements for persistent data integrity and long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C02B-10PU-1.8 | Successor revision with enhanced ESD rating (4 kV HBM), improved 1.8V tLOW/tHIGH margins, and updated qualification per AEC-Q100 Grade 2. | Preferred for new automotive designs requiring extended temperature validation; identical pinout and firmware interface. | Select AT24C02B-10PU-1.8 for new designs targeting automotive or high-reliability industrial use. |
| BR24G02-10PU-1.8 | Rohm equivalent with same 2K size, 1.8V operation, and PDIP-8 package; supports 400 kHz at 1.8V (vs. 100 kHz for AT24C02-10PU-1.8). | Better suited for systems requiring faster configuration loads; differs in I²C ACK timing and WP behavior during power ramp. | Choose BR24G02-10PU-1.8 only if higher-speed writes are needed and timing margins have been verified in target MCU firmware. |
Compared with AT24C02-10PU-1.8, the AT24C02B-10PU-1.8 offers improved robustness for harsh environments without layout changes, while BR24G02-10PU-1.8 provides faster write throughput but requires firmware timing validation due to differing AC characteristics.
Availability
AT24C02-10PU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, printer consumable authentication, and power-management configuration requiring stable component supply and long-lifecycle support.
Supply support for AT24C02-10PU-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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions for embedded control applications.
The AT24C02-10PU-1.8 belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power, and space-constrained industrial and consumer systems requiring simple, reliable nonvolatile storage.
FAQ
What is the maximum I²C clock frequency supported by AT24C02-10PU-1.8 at 1.8V?
The AT24C02-10PU-1.8 supports a maximum I²C clock frequency of 100 kHz when operating at 1.8V. This is explicitly specified in Table 5 of the datasheet under "1.8-volt" conditions. At higher supply voltages (≥2.7V), it supports up to 400 kHz, but that performance does not apply to the AT24C02-10PU-1.8 variant configured for 1.8V operation.
Does AT24C02-10PU-1.8 support partial page writes?
Yes, AT24C02-10PU-1.8 supports partial page writes: up to eight bytes can be written in a single page write cycle, and fewer than eight bytes may be transmitted before issuing a STOP condition. The internal address pointer increments automatically, and no wraparound occurs until the eighth byte - a feature confirmed for the AT24C02 (2K) variant in the "Page Write" section of the datasheet.
What package type is used by AT24C02-10PU-1.8?
AT24C02-10PU-1.8 uses an 8-lead JEDEC PDIP (Plastic Dual Inline Package), designated as 8P3 in Microchip's ordering information. It has a 0.300" body width, through-hole mounting, and is RoHS-compliant with green molding compound and NiPdAu lead finish.
How does the WP pin function on AT24C02-10PU-1.8?
On AT24C02-10PU-1.8, the WP (Write Protect) pin enables hardware-level write inhibition. When WP is tied to VCC, the entire 2K memory array is protected from write operations - including byte, page, and sequential writes. When WP is grounded, full read/write functionality is restored. This behavior is identical across all AT24C02 variants and is electrically validated per Table 2.
Is AT24C02-10PU-1.8 recommended for new designs?
No - Microchip explicitly states in the datasheet that AT24C02 (including AT24C02-10PU-1.8) is "Not Recommended for new design" and directs users to the AT24C02B revision instead. However, AT24C02-10PU-1.8 remains actively distributed and supported for legacy program continuity, with full documentation and availability maintained by Aetrix Electronics.
AT24C02-10PU-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:
- 5ms
- 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
AT24C02-10PU-1.8 FAQ
1.How can I place an order for AT24C02-10PU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C02-10PU-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 AT24C02-10PU-1.8 reliable?
The price and inventory of AT24C02-10PU-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 AT24C02-10PU-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C02-10PU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C02-10PU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C02-10PU-1.8?
AT24C02-10PU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C02-10PU-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 AT24C02-10PU-1.8?
For technical support, including AT24C02-10PU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C02-10PU-1.8 requirements.
6.How does Aetrix verify that AT24C02-10PU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C02-10PU-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 AT24C02-10PU-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C02-10PU-1.8?
All AT24C02-10PU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C02-10PU-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 AT24C02-10PU-1.8 part is unused and in its original packaging.
Return procedure for AT24C02-10PU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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