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Microchip Technology AT24C02C-MAPD-T
- Part No.:
- AT24C02C-MAPD-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
AT24C02C-MAPD-T.pdf
- Description:
- IC EEPROM 2KBIT I2C 1MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,702
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Product details
Overview
AT24C02C-MAPD-T from Microchip Technology (formerly Atmel) is a 2-kilobit (256 × 8) automotive-grade I²C serial EEPROM with 8-pin UDFN package, 1.7V–5.5V supply range, -40°C to +125°C Grade 1 operation, and hardware write protection via WP pin. It delivers 400 kHz I²C interface speed, 8-byte page writes, and is used for parameter storage in engine control units and ADAS sensor modules.
For engineers reviewing the AT24C02C-MAPD-T datasheet, AT24C02C-MAPD-T pinout, AT24C02C-MAPD-T application, or AT24C02C-MAPD-T equivalent, key selection criteria include Grade 1 temperature compliance, UDFN-8 footprint compatibility, 1,000,000 write endurance, and I²C address flexibility using A0–A2 pins in automotive powertrain and body electronics designs.
Technical Context
The AT24C02C-MAPD-T implements a two-wire I²C-compatible interface with Schmitt-triggered, noise-filtered SCL/SDA inputs and open-drain SDA output. Its internal architecture includes an 8-bit device address decoder (1010xxxA), 256-word memory array organized into 32 pages of 8 bytes each, and a self-timed write cycle controller with 5 ms maximum duration.
It supports byte and page write modes, current/random/sequential read operations, and acknowledge polling during write cycles. The WP pin enables full-array hardware write protection when tied to VCC, while A0–A2 pins configure the device address for up to eight devices on a shared bus - critical for multi-node automotive ECUs requiring nonvolatile configuration storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,048 bits (256 words × 8 bits), enabling storage of calibration coefficients or fault logs in compact ECU firmware. |
| Interface | I²C-compatible 2-wire serial bus with 400 kHz max clock frequency at 2.5V - suitable for real-time parameter updates without CPU overhead. |
| Supply Voltage | 1.7V to 5.5V - supports wide-input automotive power rails including post-regulated 3.3V and unregulated 5V domains. |
| Operating Temp | -40°C to +125°C (Grade 1 per AEC-Q100) - qualified for under-hood engine control module deployment. |
| Endurance | 1,000,000 write cycles - ensures reliable reprogramming over full vehicle lifetime (15+ years). |
| Data Retention | 100 years at +25°C - guarantees long-term integrity of stored calibration data without refresh. |
| Write Protection | Hardware-enabled via WP pin - prevents accidental overwrites during ECU boot or reset sequences. |
Pinout & Package
AT24C02C-MAPD-T uses an 8-pad UDFN package (2.0 mm × 3.0 mm, 0.5 mm pitch, JEDEC MO-229 variant 8MA2), optimized for space-constrained automotive PCBs. Pin 1 is marked by a dot or chamfered corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired LSB of 3-bit device address; enables up to eight AT24C02C devices on one I²C bus. |
| A1 | Device Address Input | Mid-bit of device address; combined with A0/A2, selects unique I²C slave address (1010xxxA format). |
| A2 | Device Address Input | MSB of device address; determines position within 8-device addressing window on shared bus. |
| GND | Ground Reference | System return path for all internal logic and I/O; must be low-impedance connection in noisy automotive environments. |
| VCC | Power Supply | Primary DC input (1.7–5.5V); internal POR circuit ensures reliable initialization across voltage ramp profiles. |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC disables all writes; tied to GND enables normal read/write access. |
| SCL | Serial Clock Input | Positive-edge clock for data-in; negative-edge clock for data-out; includes Schmitt trigger and noise filtering. |
| SDA | Serial Data I/O | Open-drain bidirectional line; requires external pull-up resistor; supports wire-OR with other I²C devices. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Grade 1 Qualification | Validated per AEC-Q100 Rev G for -40°C to +125°C operation - meets OEM requirements for powertrain and chassis modules. |
| Page Write Capability | 8-byte page writes reduce I²C transaction count by up to 8× versus byte writes - accelerates bulk parameter updates in diagnostic sessions. |
| Self-timed Write Cycle | Internal 5 ms max write completion eliminates need for software delay loops - simplifies firmware integration and improves system responsiveness. |
| Noise-immune Inputs | Schmitt-triggered SCL/SDA with built-in filtering suppresses EMI-induced glitches common in 12V automotive electrical systems. |
| Low Standby Current | Max 4.0 μA at 5.0V - minimizes quiescent power draw in always-on vehicle networks like CAN FD gateways. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Storing adaptive fuel trim values, misfire counters, and OBD-II diagnostic trouble codes (DTCs) that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration and runtime data logger interfaced via I²C to MCU's peripheral controller. Use Value: Enables regulatory-compliant emissions monitoring and field-upgradable calibration without external backup power or supercapacitors. | Use Scenario: Retaining camera lens calibration offsets, radar beam alignment parameters, and sensor fusion coefficients after vehicle shutdown. IC Role / Device Role / Timing Role: Persistent memory node on distributed ADAS domain controller I²C bus. Use Value: Maintains sensor accuracy over 100,000+ ignition cycles and 100-year data retention - eliminating recalibration visits. |
| Body Control Module (BCM) | Electric Power Steering (EPS) |
Use Scenario: Saving user preferences (window positions, mirror angles, lighting profiles) and door lock event history in battery-backed memory subsystems. IC Role / Device Role / Timing Role: Low-power I²C slave storing infotainment-linked settings accessible during wake-on-LIN events. Use Value: Achieves <10 μA total standby current with WP pin asserted during sleep - extending battery life in parked vehicle mode. | Use Scenario: Recording torque sensor zero-point drift compensation and motor phase resistance values for closed-loop steering assist tuning. IC Role / Device Role / Timing Role: Safety-critical parameter store accessed by ASIL-B microcontroller during startup self-test. Use Value: Grade 1 temperature rating ensures valid calibration data at under-hood ambient temperatures exceeding 105°C. |
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, SOIC-8 package, 1.7–5.5V, but rated only to +85°C (Grade 3); no AEC-Q100 qualification. | Limited to cabin modules (infotainment, HVAC) where ambient temperature stays below 85°C. | Select when cost sensitivity outweighs under-hood qualification needs and SOIC layout is already fixed. |
| Renesas R1EX24002ASAS0I | 2K I²C EEPROM, AEC-Q100 Grade 1, same UDFN-8 footprint, but supports 1 MHz I²C and 10-year data retention at +125°C. | Better suited for high-throughput diagnostics or extended-life commercial vehicles requiring >10-year retention at max temp. | Choose for next-gen platforms needing faster programming or longer high-temp data integrity - accepts same PCB land pattern. |
Compared with M24C02-RMN6TP, AT24C02C-MAPD-T provides certified Grade 1 operation essential for powertrain use, while Renesas R1EX24002ASAS0I offers higher I²C speed and extended retention - making AT24C02C-MAPD-T the balanced choice for cost-sensitive, AEC-Q100–compliant automotive designs requiring proven reliability.
Availability
AT24C02C-MAPD-T is available at Aetrix Electronics and suitable for engine control units, ADAS sensor modules, body control modules, and electric power steering systems requiring stable component supply across automotive production lifecycles.
Supply support for AT24C02C-MAPD-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-MAPD-T belongs to Microchip's automotive-qualified serial EEPROM product line, designed specifically for robust, low-power nonvolatile data storage in harsh-temperature vehicle subsystems.
FAQ
What is the operating voltage range for the AT24C02C-MAPD-T?
The AT24C02C-MAPD-T operates from 1.7V to 5.5V, supporting both low-voltage microcontroller interfaces (e.g., 1.8V logic) and legacy 5V automotive domains. This dual-range capability eliminates level-shifting requirements in mixed-voltage ECU designs and ensures compatibility with battery-supplied modules during cranking conditions down to 6V system voltage.
Does the AT24C02C-MAPD-T require external pull-up resistors on SDA and SCL lines?
Yes, the AT24C02C-MAPD-T requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is a CMOS input. Typical values are 2.2 kΩ to 4.7 kΩ for 400 kHz operation at 3.3V; resistor selection must account for bus capacitance, number of devices, and rise time requirements per I²C specification - confirmed in the AT24C02C-MAPD-T datasheet Section 5.3.
How many devices can share the same I²C bus with AT24C02C-MAPD-T?
Up to eight AT24C02C-MAPD-T devices can share a single I²C bus using the A0, A1, and A2 address pins to configure unique 3-bit device addresses. Each pin is hardwired to VCC or GND, forming a binary-encoded slave address prefix (1010xxxA). This allows flexible topology design in multi-sensor ECUs without address conflicts or software arbitration overhead.
Is the AT24C02C-MAPD-T pin-compatible with other packages in the AT24C02C family?
No - the AT24C02C-MAPD-T uses an 8-pad UDFN package (8MA2), which is not pin-compatible with the SOIC-8 (8S1) or TSSOP-8 (8X) variants of the same part. While all share identical pin functions and ordering code logic, the UDFN package has bottom-side pads and different mechanical dimensions, requiring separate PCB footprints and reflow profiles.
What is the maximum write cycle time for the AT24C02C-MAPD-T?
The maximum write cycle time for the AT24C02C-MAPD-T is 5 ms, as specified in the datasheet AC Characteristics table (tWR). This self-timed internal operation begins after the Stop condition and completes before the device responds to subsequent I²C commands. Firmware must implement acknowledge polling or fixed delays to avoid bus errors during write execution.
AT24C02C-MAPD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- 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-UDFN (2x3)
AT24C02C-MAPD-T FAQ
1.How can I place an order for AT24C02C-MAPD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C02C-MAPD-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-MAPD-T reliable?
The price and inventory of AT24C02C-MAPD-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-MAPD-T is usually 5 days.
3.What payment methods are accepted for AT24C02C-MAPD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C02C-MAPD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C02C-MAPD-T?
AT24C02C-MAPD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C02C-MAPD-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-MAPD-T?
For technical support, including AT24C02C-MAPD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C02C-MAPD-T requirements.
6.How does Aetrix verify that AT24C02C-MAPD-T is sourced from the original manufacturer or authorized distributors?
All AT24C02C-MAPD-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-MAPD-T meets industry standards.
7.What is the process for return or replacement of AT24C02C-MAPD-T?
All AT24C02C-MAPD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C02C-MAPD-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-MAPD-T part is unused and in its original packaging.
Return procedure for AT24C02C-MAPD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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