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Microchip Technology AT24C02C-XPD-T
- Part No.:
- AT24C02C-XPD-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24C02C-XPD-T.pdf
- Description:
- IC EEPROM 2KBIT I2C 1MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT24C02C-XPD-T from Microchip Technology (formerly Atmel) is a 2-kilobit (256 × 8) automotive-grade I²C serial EEPROM with AEC-Q100 Grade 1 qualification, operating from 2.5V to 5.5V over −40°C to +125°C. It features hardware write protection via the WP pin, 8-byte page write capability, Schmitt-trigger inputs for noise immunity, and 1,000,000 write cycles endurance - deployed in engine control units, ADAS sensor modules, and infotainment system configuration storage.
For engineers reviewing the AT24C02C-XPD-T datasheet, AT24C02C-XPD-T pinout, AT24C02C-XPD-T application, or AT24C02C-XPD-T equivalent, key selection criteria include its Grade 1 temperature rating, TSSOP-8 package footprint, 400 kHz I²C compatibility at 2.5V, 5 ms max self-timed write cycle, and support for partial page writes without address rollover within the 8-byte boundary.
Technical Context
The AT24C02C-XPD-T implements a standard two-wire I²C interface with fixed 7-bit device address prefix '1010' and three hardware-selectable address bits (A2–A0), enabling up to eight devices on a single bus. Its internal memory is organized as 32 pages of 8 bytes each, requiring an 8-bit word address for random access.
Write operations support both byte and page modes; after a Stop condition initiates an internal 5 ms write cycle, inputs are disabled until completion. Acknowledge polling allows host firmware to detect write completion without fixed delay timing, improving system responsiveness in time-critical automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,048 bits (256 words × 8 bits), sufficient for storing calibration data, VIN, firmware version, or user preferences in ECUs |
| I²C Speed | 400 kHz maximum at VCC = 2.5V - supports real-time parameter updates without bus contention in multi-node automotive networks |
| Write Cycle Time | 5 ms maximum self-timed - eliminates need for external wait-state logic and simplifies host MCU firmware |
| Endurance | 1,000,000 write cycles - enables reliable logging of diagnostic trouble codes (DTCs) over full vehicle lifetime |
| Data Retention | 100 years at +25°C - ensures long-term integrity of safety-critical configuration parameters across product lifecycle |
| Supply Voltage | 2.5V to 5.5V (Grade 1) - compatible with 3.3V and 5V automotive microcontrollers and power domains |
| Operating Temp | −40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and transmission control applications |
Pinout & Package
AT24C02C-XPD-T is supplied in an 8-lead TSSOP package (JEDEC MO-153, 4.4 mm body width), optimized for high-density automotive PCB layouts with thermal and mechanical robustness.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired LSB of 3-bit device address; enables up to eight AT24C02C-XPD-T devices on one I²C bus |
| A1 | Device Address Input | Mid-bit of device address; used with A0 and A2 to configure unique slave address in multi-device systems |
| A2 | Device Address Input | MSB of device address; all three pins (A2–A0) must match transmitted address for device response |
| GND | Ground Reference | Return path for VCC and signal currents; requires low-impedance connection to minimize noise coupling in ECU designs |
| VCC | Power Supply | 2.5V–5.5V supply input; includes internal POR circuitry that requires monotonic ramp-up <1 ms for reliable initialization |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC disables all writes to entire memory array, preventing accidental corruption during power transitions |
| SCL | Serial Clock Input | Open-drain input synchronized to host controller; Schmitt-trigger input suppresses ringing and EMI-induced glitches |
| SDA | Serial Data I/O | Open-drain bidirectional line shared across I²C bus; requires external pull-up resistor (typically 1.3 kΩ at 2.5V) |
Key Features
| Feature | Design Value |
|---|---|
| Grade 1 AEC-Q100 Qualification | Validated for −40°C to +125°C operation with extended reliability testing - meets functional safety requirements for ASIL-B systems |
| Hardware Write Protection | WP pin enables fail-safe locking of memory contents during power-up/down sequences or software resets, eliminating need for software-based lock mechanisms |
| 8-byte Page Write Mode | Allows burst programming of up to 8 bytes with single Start/Stop sequence - reduces I²C transaction overhead by 87% vs. individual byte writes |
| Schmitt Trigger Inputs | Input hysteresis on SCL and SDA rejects noise spikes up to 300 ns duration - critical for stable operation in high-EMI engine bay environments |
| Partial Page Write Support | Enables writing fewer than 8 bytes into a page without corrupting adjacent locations - simplifies firmware handling of variable-length parameter updates |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Storing adaptive fuel trim values, knock sensor learning offsets, and throttle position calibration tables that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with deterministic 5 ms write latency and guaranteed retention over 15-year vehicle service life. Use Value: Enables closed-loop engine optimization without battery-backed SRAM, reducing BOM cost and eliminating supercapacitor aging concerns. | Use Scenario: Retaining camera lens distortion coefficients, radar object tracking history, and lane departure warning thresholds across power-down events. IC Role / Device Role / Timing Role: I²C-accessible persistent memory with Grade 1 thermal rating, supporting real-time parameter updates during vehicle wake-up sequences. Use Value: Eliminates retraining delays at startup by preserving calibrated sensor models - critical for ISO 26262 ASIL-B compliance. |
| Infotainment System | Body Control Module (BCM) |
Use Scenario: Saving user-configured display brightness, audio equalizer presets, Bluetooth pairing IDs, and navigation favorites. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced directly to application processor's I²C controller, accessed during boot and runtime. Use Value: Provides zero-latency access to personalized settings while consuming <3 μA standby current at 2.5V - extends battery drain time in accessory mode. | Use Scenario: Recording door lock actuation counts, window position memory, and lighting fade profiles for OEM diagnostics and warranty analysis. IC Role / Device Role / Timing Role: Robust data logger with 1M write endurance, supporting daily parameter updates over 27 years of typical vehicle usage. Use Value: Replaces costly FRAM or battery-backed NVSRAM while maintaining full AEC-Q100 compliance and field-replaceable design. |
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 density, TSSOP-8, 1.7–5.5V operation (Grade 3), −40°C to +85°C | Limited to passenger compartment use; not rated for under-hood thermal stress | Select when cost sensitivity outweighs extended temperature requirement and no AEC-Q100 Grade 1 is mandated |
| ON Semiconductor CAT24C02HU4IGT3 | 2K, TSSOP-8, 1.7–5.5V, −40°C to +125°C, but only AEC-Q100 Grade 2 (−40°C to +105°C) qualified | Acceptable for transmission control but not for turbocharger or exhaust gas recirculation modules | Choose if Grade 2 suffices and dual-sourcing from ON Semi is required for supply chain resilience |
Compared with M24C02-RMN6TP and CAT24C02HU4IGT3, the AT24C02C-XPD-T uniquely delivers full AEC-Q100 Grade 1 qualification at 2.5–5.5V, making it the only option certified for direct integration into high-temperature engine management subsystems without derating or thermal shielding.
Availability
AT24C02C-XPD-T is available at Aetrix Electronics and suitable for engine control units, ADAS sensor nodes, and infotainment head units requiring stable component supply across extended automotive lifecycles.
Supply support for AT24C02C-XPD-T 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 deep expertise in automotive and industrial embedded systems.
The AT24C02C-XPD-T belongs to Microchip's automotive-qualified serial EEPROM family, designed specifically for reliable nonvolatile data storage in harsh-temperature, high-reliability vehicle subsystems where power loss resilience and long-term data integrity are mandatory.
FAQ
What is the maximum I²C clock frequency supported by AT24C02C-XPD-T at 3.3V?
The AT24C02C-XPD-T supports up to 400 kHz I²C clock frequency at VCC = 2.5V, and this rating holds across its full 2.5V–5.5V operating range including 3.3V. The AC characteristics table confirms fSCL(min) = 400 kHz with tLOW ≥ 1200 ns and tHIGH ≥ 600 ns - ensuring interoperability with standard automotive microcontroller I²C peripherals without timing margin violations. AT24C02C-XPD-T does not support Fast Mode Plus (1 MHz) or High-Speed Mode.
Does AT24C02C-XPD-T require external pull-up resistors on SDA and SCL lines?
Yes, AT24C02C-XPD-T requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. The datasheet specifies RL = 1.3 kΩ for 2.5V operation and 10 kΩ for 1.7V operation. Proper resistor selection ensures signal rise times ≤ 300 ns and noise immunity per I²C specification - critical for stable communication in electrically noisy automotive environments. AT24C02C-XPD-T itself contains no internal pull-ups.
How does the Write Protect (WP) pin function on AT24C02C-XPD-T?
The WP pin on AT24C02C-XPD-T is an active-high hardware lock: when pulled to VCC, it disables all write operations to the entire memory array, including byte, page, and sequential writes. When grounded, normal read/write functionality resumes. This feature prevents inadvertent overwrites during power transients or firmware faults - a key safety mechanism in ASIL-B automotive systems. AT24C02C-XPD-T does not support block-level or software-controlled write protection.
What is the page size and maximum page write length for AT24C02C-XPD-T?
AT24C02C-XPD-T has a fixed page size of 8 bytes and supports page writes of up to 8 consecutive bytes starting from any address aligned to a page boundary (e.g., 0x00–0x07, 0x08–0x0F). Attempting to write beyond the 8-byte boundary causes automatic address rollover to the start of the same page. This architecture enables efficient burst programming while constraining write latency to 5 ms per page - a deterministic timing behavior essential for real-time automotive firmware. AT24C02C-XPD-T does not support 16-byte pages (reserved for 4K/8K variants).
Is AT24C02C-XPD-T pin-compatible with other members of the AT24CxxC family?
Yes, AT24C02C-XPD-T shares identical pinout, package dimensions, and I²C protocol with AT24C01C-XPD-T, AT24C04C-XPD-T, and AT24C08C-XPD-T in the same TSSOP-8 package. All four variants use the same A2/A1/A0 addressing scheme and WP/SCL/SDA/GND/VCC pin assignments. However, memory organization differs: AT24C02C-XPD-T uses 8-bit word addressing (256 locations), whereas AT24C04C/08C require 9-/10-bit addressing - requiring firmware adaptation despite mechanical compatibility. AT24C02C-XPD-T is not pin-compatible with SOIC or UDFN variants due to differing land patterns.
AT24C02C-XPD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 450 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
AT24C02C-XPD-T FAQ
1.How can I place an order for AT24C02C-XPD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C02C-XPD-T 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 AT24C02C-XPD-T reliable?
The price and inventory of AT24C02C-XPD-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C02C-XPD-T is usually 5 days.
3.What payment methods are accepted for AT24C02C-XPD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C02C-XPD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C02C-XPD-T?
AT24C02C-XPD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C02C-XPD-T 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 AT24C02C-XPD-T?
For technical support, including AT24C02C-XPD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C02C-XPD-T requirements.
6.How does Aetrix verify that AT24C02C-XPD-T is sourced from the original manufacturer or authorized distributors?
All AT24C02C-XPD-T 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 AT24C02C-XPD-T meets industry standards.
7.What is the process for return or replacement of AT24C02C-XPD-T?
All AT24C02C-XPD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C02C-XPD-T, 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 AT24C02C-XPD-T part is unused and in its original packaging.
Return procedure for AT24C02C-XPD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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