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Microchip Technology AT24C02AN-10SC-2.5
- Part No.:
- AT24C02AN-10SC-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C02AN-10SC-2.5.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,959
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Product details
Overview
AT24C02AN-10SC-2.5 from Microchip Technology (formerly Atmel) is a 2K-bit (256 × 8) I²C-compatible serial EEPROM with hardware write protection, low-voltage operation (2.5V to 5.5V), and 100 kHz maximum clock frequency. It features 8-byte page writes, 1 million write cycles endurance, and 100-year data retention - deployed in industrial control panels, smart metering firmware storage, and embedded sensor calibration memory.
For engineers reviewing the AT24C02AN-10SC-2.5 datasheet, AT24C02AN-10SC-2.5 pinout, AT24C02AN-10SC-2.5 application, or AT24C02AN-10SC-2.5 equivalent, key selection considerations include VCC range compatibility (2.5–5.5V), 8-pin SOIC package footprint, WP pin hardware lock behavior, and I²C timing compliance at 100 kHz under low-voltage conditions.
Technical Context
The AT24C02AN-10SC-2.5 implements a standard two-wire I²C interface with open-drain SDA and Schmitt-triggered SCL inputs for noise immunity. It uses hardwired A0–A2 address pins to support up to eight devices on one bus and employs an internal 8-bit word address counter for sequential read operations.
Write protection is enforced via the WP pin: when tied to VCC, the upper half (1K-bit) of the 2K array is locked against writes; when grounded, full read/write access is enabled. The device enters self-timed 10 ms write cycles after each STOP condition, during which all inputs are ignored until completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8), organized as 256 words of 8 bits - supports byte- and page-level updates without block erasure. |
| Supply Voltage Range | 2.5V to 5.5V - enables direct integration into 2.5V logic systems or mixed-voltage boards without level-shifting. |
| I²C Clock Frequency | 100 kHz max (at 2.5V) - ensures reliable communication in noise-sensitive industrial environments with reduced slew rate requirements. |
| Page Write Capacity | 8-byte pages - reduces I²C transaction overhead versus byte writes; partial page writes allowed for efficient small-data updates. |
| Endurance & Retention | 1 million write cycles / 100 years data retention - validated for long-life applications like utility meter firmware or medical device calibration tables. |
| Write Protect Logic | WP = VCC locks upper 1K-bit segment; WP = GND enables full access - provides hardware-enforced partitioning for critical configuration data. |
| Standby Current | 4 µA max at 2.5V - minimizes quiescent power in battery-backed or energy-harvesting systems. |
Pinout & Package
AT24C02AN-10SC-2.5 is housed in an 8-pin JEDEC SOIC package (8S1), 0.150" wide, with gull-wing leads and standard 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired address bit; sets LSB of 3-bit device address (0–7) for multi-device I²C bus configuration. |
| A1 | Device Address Input | Hardwired address bit; sets middle bit of 3-bit device address - enables up to eight AT24C02AN-10SC-2.5 units on one bus. |
| A2 | Device Address Input | Hardwired address bit; sets MSB of 3-bit device address - used with A0/A1 to uniquely identify this EEPROM on shared I²C lines. |
| GND | Ground Reference | Return path for VCC and signal currents; must be low-impedance to ensure stable I²C signaling and noise immunity. |
| VCC | Power Supply | 2.5V–5.5V supply input; powers internal logic and memory array - decoupling capacitor (0.1 µF) required near pin. |
| WP | Write Protect Control | Hardware lock: high = protect upper 1K-bit; low = full read/write - eliminates software-only vulnerabilities in field-updatable systems. |
| SCL | Serial Clock Input | I²C clock line; positive-edge sampled for data-in, negative-edge for data-out - requires external pull-up resistor (typically 4.7 kΩ). |
| SDA | Serial Data I/O | Bidirectional open-drain I²C data line - shared across multiple devices; requires external pull-up and supports wire-OR logic. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Write Protection | WP pin physically disables writes to upper 1K-bit memory segment - prevents accidental or malicious overwrites of critical boot parameters. |
| Low-Voltage Operation | Functional down to 2.5V supply - supports direct interfacing with 2.5V microcontrollers (e.g., STM32L0, MSP430FR) without voltage translation. |
| Noise-Resistant Inputs | Schmitt-triggered SCL and filtered inputs - suppresses EMI-induced glitches in motor drives, PLCs, and industrial gateways. |
| Page Write Efficiency | 8-byte page writes reduce I²C bus occupancy by ~88% vs. eight separate byte writes - accelerates firmware patching and logging operations. |
| High Reliability | 1M write cycles + 100-year retention - qualified for automotive-grade extended temperature (-40°C to +85°C) and industrial deployments. |
Applications
| Industrial Sensor Calibration | Smart Energy Meter Firmware Storage |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during power-on initialization via I²C; no timing-critical latency requirement. Use Value: Enables field-replaceable sensor modules with persistent calibration - eliminates need for re-trimming after module swap. |
Use Scenario: Holding tariff tables, billing counters, and cryptographic keys in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: Secure, low-power configuration memory updated infrequently but requiring guaranteed write integrity. Use Value: WP pin prevents unauthorized firmware modification during meter deployment; 100-year retention meets utility 20+ year service life. |
| Embedded HMI Configuration | Medical Device Settings Backup |
Use Scenario: Saving user preferences (language, brightness, alarm thresholds) in touch-panel HMIs for HVAC and building automation. IC Role / Device Role / Timing Role: I²C slave device storing <1 KB of static settings; accessed only on power-up or menu save events. Use Value: 4 µA standby current extends battery backup runtime; 8-byte page writes minimize UI lag during save operations. |
Use Scenario: Backing up patient-specific therapy parameters (e.g., infusion rates, pressure limits) in portable infusion pumps. IC Role / Device Role / Timing Role: Fail-safe nonvolatile memory with hardware write lock - prevents corruption during unexpected power loss. Use Value: WP = VCC ensures therapy-critical defaults remain unaltered; 1M endurance supports daily recalibration over 10+ years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics M24C02-RMN6TP | Same 2K-bit size, 2.5–5.5V, 100 kHz I²C, 8-pin SOIC; but WP pin protects entire array (not upper half only). | Requires firmware update if relying on partial-array protection; identical page write and endurance specs. | Select when full-array lock suffices and ST's qualification for medical/industrial use aligns with system certification needs. |
| ON Semiconductor CAT24C02HU4I-GT3 | 2K-bit, 1.7–5.5V, 400 kHz I²C, same 8-pin SOIC; includes early-write-detection flag and enhanced ESD (>4 kV). | Supports faster 400 kHz writes at ≥2.7V; not rated for 2.5V operation - unsuitable for strict 2.5V-only designs. | Choose for higher-speed I²C buses where VCC ≥2.7V; verify WP behavior matches design intent (full-array lock). |
Compared with AT24C02AN-10SC-2.5, M24C02-RMN6TP offers identical voltage and timing but different WP granularity, while CAT24C02HU4I-GT3 enables faster writes above 2.7V but lacks true 2.5V compatibility - both require validation of write-protection logic in safety-critical firmware.
Availability
AT24C02AN-10SC-2.5 is available at Aetrix Electronics and suitable for industrial sensor calibration, smart energy meter firmware storage, and embedded HMI configuration requiring stable component supply across extended product lifecycles.
Supply support for AT24C02AN-10SC-2.5 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 acquired Atmel in 2016 and maintains full technical support, documentation, and manufacturing continuity for the AT24CxxA EEPROM family.
The AT24C02A series was designed for cost-sensitive, low-power embedded systems requiring robust nonvolatile storage - emphasizing I²C simplicity, hardware data protection, and long-term reliability in industrial and commercial environments.
FAQ
What is the operating voltage range for the AT24C02AN-10SC-2.5?
The AT24C02AN-10SC-2.5 operates from 2.5V to 5.5V DC. This low-voltage capability allows direct interfacing with 2.5V microcontrollers and mixed-signal SoCs without level shifters. The "-2.5" suffix explicitly denotes qualification across this range, with full functionality including 100 kHz I²C communication and 8-byte page writes verified at 2.5V.
How does the Write Protect (WP) pin function on the AT24C02AN-10SC-2.5?
On the AT24C02AN-10SC-2.5, the WP pin provides hardware-level memory protection: when pulled high to VCC, it locks the upper 1K-bit (1024-bit) segment against writes while allowing full read access; when grounded, all 2K bits are writable. This enables secure partitioning of critical calibration data from user-modifiable settings.
What package type is used for the AT24C02AN-10SC-2.5?
The AT24C02AN-10SC-2.5 uses an 8-pin JEDEC SOIC package (8S1), 0.150" wide, with gull-wing leads and 1.27 mm pitch. This surface-mount package is compatible with standard reflow profiles and widely supported in industrial PCB assembly - distinct from PDIP, TSSOP, or 14-pin SOIC variants in the same family.
Does the AT24C02AN-10SC-2.5 support standard I²C addressing and protocols?
Yes, the AT24C02AN-10SC-2.5 fully complies with standard I²C protocol: it responds to a 7-bit device address (1010xxx, where xxx = A2/A1/A0 pins) followed by R/W bit, supports START/STOP conditions, ACK/NACK handshaking, and both byte and 8-byte page writes. Its SCL/SDA inputs meet I²C electrical specifications including rise/fall time and noise filtering.
What is the maximum write cycle time for the AT24C02AN-10SC-2.5?
The AT24C02AN-10SC-2.5 has a maximum write cycle time of 10 ms, measured from the STOP condition of a write sequence to completion of the internal write operation. During this period, the device ignores all I²C inputs - applications must implement acknowledge polling or fixed-delay waits before initiating subsequent commands.
AT24C02AN-10SC-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C02AN-10SC-2.5 FAQ
1.How can I place an order for AT24C02AN-10SC-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C02AN-10SC-2.5 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 AT24C02AN-10SC-2.5 reliable?
The price and inventory of AT24C02AN-10SC-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C02AN-10SC-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C02AN-10SC-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C02AN-10SC-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C02AN-10SC-2.5?
AT24C02AN-10SC-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C02AN-10SC-2.5 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 AT24C02AN-10SC-2.5?
For technical support, including AT24C02AN-10SC-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C02AN-10SC-2.5 requirements.
6.How does Aetrix verify that AT24C02AN-10SC-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C02AN-10SC-2.5 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 AT24C02AN-10SC-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C02AN-10SC-2.5?
All AT24C02AN-10SC-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C02AN-10SC-2.5, 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 AT24C02AN-10SC-2.5 part is unused and in its original packaging.
Return procedure for AT24C02AN-10SC-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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