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Microchip Technology AT24C08C-MAPD-E
- Part No.:
- AT24C08C-MAPD-E
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
AT24C08C-MAPD-E.pdf
- Description:
- IC EEPROM 8KBIT I2C 1MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,984
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Product details
Overview
AT24C08C-MAPD-E from Microchip Technology (formerly Atmel) is an automotive-grade 8K-bit I²C serial EEPROM organized as 1,024 words × 8 bits, housed in an 8-pad UDFN package (2.0 mm × 3.0 mm, 0.5 mm pitch). It operates from 2.5 V to 5.5 V (Grade 1), supports 400 kHz I²C communication, features hardware write protection via the WP pin, and delivers 1,000,000 write cycles with 100-year data retention - deployed in engine control units, ADAS sensor modules, and infotainment system configuration storage.
For engineers reviewing the AT24C08C-MAPD-E datasheet, AT24C08C-MAPD-E pinout, AT24C08C-MAPD-E application, or AT24C08C-MAPD-E equivalent, key selection criteria include Grade 1 automotive temperature range (−40°C to +125°C), 16-byte page write capability, Schmitt-triggered noise-immune inputs, self-timed 5 ms max write cycle, and compatibility with standard I²C host controllers requiring A2-only device addressing.
Technical Context
The AT24C08C-MAPD-E implements a 2-wire I²C interface with fixed 7-bit device address prefix '1010' and single hardwired A2 address bit - enabling up to two devices on one bus. Its internal memory is segmented into 64 pages of 16 bytes each, requiring a 10-bit word address for random access.
It integrates a high-voltage pump for EEPROM programming, on-chip timing logic for self-timed writes, and bidirectional open-drain SDA with internal pull-up compatibility. The WP pin asserts full-array hardware write protection when driven high, while Schmitt-trigger inputs and input filtering suppress EMI in automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8,192 bits (1,024 × 8-bit words) - sufficient for storing calibration tables, VIN/ECU firmware identifiers, or safety-critical configuration parameters in Tier-1 automotive modules. |
| Interface Protocol | I²C-compatible 2-wire serial - interoperable with standard microcontroller I²C peripherals without protocol translation or additional logic. |
| Operating Voltage | 2.5 V to 5.5 V (Grade 1) - matches automotive 3.3 V and 5 V supply rails while maintaining operation during cold-crank brownouts down to 2.5 V. |
| Temperature Range | −40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and transmission-control applications. |
| Write Cycle Time | Max 5 ms self-timed - enables deterministic firmware update sequencing without polling overhead or timeout uncertainty. |
| Endurance & Retention | 1,000,000 write cycles / 100 years data retention - meets ASAM MCD-2 MC requirements for long-life vehicle ECUs with field-programmable calibration data. |
| Page Write Size | 16 bytes per page - optimizes burst writes of CAN message buffers, sensor offset arrays, or cryptographic keys without excessive I²C transaction overhead. |
Pinout & Package
AT24C08C-MAPD-E uses an 8-pad Ultra-Thin Dual No-Lead (UDFN) package (2.0 mm × 3.0 mm body, 0.5 mm pitch), compliant with JEDEC MO-220, suitable for space-constrained automotive PCBs with automated optical inspection support.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A2 | Device Address Input | Hardwired address bit - only A2 is functional for AT24C08C; enables up to two devices on same I²C bus (A2 = 0 or 1); A0/A1 are no-connect. |
| GND | Ground Reference | Primary return path for VCC and I/O signals; requires low-inductance connection to chassis ground in automotive layouts to suppress transients. |
| VCC | Power Supply | 2.5–5.5 V DC input; must ramp monotonically within 1 ms and hold ≥100 µs before first I²C transaction per POR specification. |
| WP | Write Protect Control | Active-high hardware lock - ties to VCC to disable all writes (full-array protection); ties to GND for normal read/write operation. |
| SCL | Serial Clock Input | Positive-edge clock for data-in; negative-edge clock for data-out; requires external pull-up; supports 400 kHz max frequency at 2.5 V. |
| SDA | Serial Data I/O | Open-drain bidirectional line - wire-ORable with other I²C devices; requires external pull-up; Schmitt-trigger input suppresses noise. |
Key Features
| Feature | Design Value |
|---|---|
| Grade 1 Automotive Qualification | AEC-Q100 qualified for −40°C to +125°C operation - validated for engine bay, transmission, and brake control module deployment without derating. |
| Hardware Write Protection | WP pin enables fail-safe, non-software-dependent lockdown of stored calibration or security keys during vehicle runtime or firmware updates. |
| Noise-Immune Inputs | Schmitt-trigger + RC filtering on SCL/SDA/A2 - rejects >50 ns glitches and meets ISO 11452-4 bulk current injection immunity requirements. |
| 16-Byte Page Writes | Reduces I²C transaction count by 50% vs. byte writes for multi-word updates - critical for minimizing bus occupancy in real-time CAN/I²C coexistence systems. |
| Low Standby Current | Max 6.0 µA at 5.0 V - extends battery life in always-on telematics modules and reduces thermal load in sealed enclosures. |
Applications
| Engine Control Unit (ECU) Calibration Storage | Advanced Driver Assistance Systems (ADAS) Sensor Configuration |
|---|---|
Use Scenario: Storing fuel map coefficients, ignition timing offsets, and OBD-II diagnostic freeze-frame data across vehicle lifetime and software updates. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed via I²C during ECU boot and reprogramming sequences. Use Value: Enables field-upgradable calibration without soldered ROM; 100-year retention ensures data integrity over 15+ year vehicle service life. | Use Scenario: Holding camera lens distortion parameters, radar beam alignment offsets, and fusion algorithm weights in front-facing ADAS cameras and radar modules. IC Role / Device Role / Timing Role: Persistent parameter store queried at power-on and updated after sensor recalibration routines. Use Value: Maintains sensor accuracy despite vibration, thermal cycling, and EMI exposure - validated to AEC-Q100 Grade 1 stress profiles. |
| Infotainment System User Profile Memory | Electric Power Steering (EPS) Motor Control Parameters |
Use Scenario: Saving driver seat position, HVAC presets, audio equalizer settings, and Bluetooth pairing IDs across ignition cycles. IC Role / Device Role / Timing Role: Low-power I²C slave storing user-configurable state variables accessed during HMI initialization. Use Value: 1,000,000 write cycles support daily profile changes over 27 years; 2.5 V min operation ensures reliability during stop-start battery voltage dips. | Use Scenario: Storing torque assist maps, steering angle compensation curves, and fault history logs in EPS electronic control units. IC Role / Device Role / Timing Role: Safety-relevant nonvolatile memory holding ASIL-B compliant control parameters accessed during motor startup and fault recovery. Use Value: Hardware WP pin prevents accidental overwrites during CAN-based firmware updates; Grade 1 temp rating withstands under-dash thermal environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics M24C08-RMN6TP | Same 8K-bit density, SOIC-8 package, 1.7–5.5 V (Grade 3, −40°C to +85°C); lacks AEC-Q100 Grade 1 qualification. | Targeted at industrial/commercial systems; not certified for under-hood automotive use. | Select when cost sensitivity outweighs extended temperature requirement and AEC-Q100 compliance is not mandated. |
| Renesas R1EX24008ASAS0I | 8K-bit, TSSOP-8, 1.7–5.5 V, AEC-Q100 Grade 2 (−40°C to +105°C); supports 1 MHz I²C at 5 V but no WP pin. | Valid for cabin electronics and gateway modules; unsuitable for full engine-bay deployment due to lower max temperature. | Choose for higher-speed I²C throughput where hardware write protection is managed externally or via software locks. |
Compared with M24C08-RMN6TP and R1EX24008ASAS0I, the AT24C08C-MAPD-E uniquely combines AEC-Q100 Grade 1 qualification, integrated WP pin, and UDFN packaging - making it the only option qualified for direct integration into safety-critical, high-temperature automotive subsystems without external protection circuitry.
Availability
AT24C08C-MAPD-E is available at Aetrix Electronics and suitable for engine control units, ADAS sensor modules, and infotainment systems requiring stable component supply across extended automotive product lifecycles.
Supply support for AT24C08C-MAPD-E 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 AT24C08C-MAPD-E belongs to Microchip's automotive-qualified serial EEPROM product line, engineered specifically for reliable nonvolatile data storage in harsh environments where temperature extremes, vibration, and EMI demand AEC-Q100-compliant components.
FAQ
What is the maximum I²C clock frequency supported by the AT24C08C-MAPD-E?
The AT24C08C-MAPD-E supports up to 400 kHz I²C clock frequency at VCC = 2.5 V, meeting Fast-mode I²C specifications. At higher supply voltages (e.g., 5.0 V), timing margins improve but the device remains rated for 400 kHz operation per its AC characteristics table - ensuring interoperability with legacy automotive microcontrollers lacking high-speed mode support.
Does the AT24C08C-MAPD-E require external pull-up resistors on SDA and SCL lines?
Yes, the AT24C08C-MAPD-E requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. Recommended values are 1.3 kΩ for 2.5 V/5.5 V operation and 10 kΩ for 1.7 V operation, per the AC characteristics test conditions specified in the datasheet for proper rise/fall time compliance.
How many devices can share the same I²C bus with the AT24C08C-MAPD-E?
Up to two AT24C08C-MAPD-E devices can share one I²C bus, as only the A2 pin is used for hardwired device addressing (A0 and A1 are no-connect). Each device must have A2 tied to a unique logic level (GND or VCC) to generate distinct 7-bit addresses ('1010_0xx' or '1010_1xx') per the device addressing scheme.
What is the function of the WP pin on the AT24C08C-MAPD-E?
The WP (Write Protect) pin on the AT24C08C-MAPD-E provides hardware-level write inhibition: when pulled high to VCC, it disables all write operations to the entire memory array; when pulled low to GND, normal read/write functionality is enabled. This prevents unintended firmware corruption during power transients or software faults.
Is the AT24C08C-MAPD-E compatible with standard I²C controllers without custom drivers?
Yes, the AT24C08C-MAPD-E is fully compatible with standard I²C controllers supporting Fast-mode (400 kHz) and standard-mode (100 kHz) protocols. It uses standard START/STOP conditions, ACK/NACK handshaking, and 7-bit addressing - requiring no proprietary drivers or protocol extensions for integration into existing automotive MCU platforms.
AT24C08C-MAPD-E 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:
- 8Kbit
- Memory Organization:
- 1K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 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)
AT24C08C-MAPD-E FAQ
1.How can I place an order for AT24C08C-MAPD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C08C-MAPD-E 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 AT24C08C-MAPD-E reliable?
The price and inventory of AT24C08C-MAPD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C08C-MAPD-E is usually 5 days.
3.What payment methods are accepted for AT24C08C-MAPD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C08C-MAPD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C08C-MAPD-E?
AT24C08C-MAPD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C08C-MAPD-E 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 AT24C08C-MAPD-E?
For technical support, including AT24C08C-MAPD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C08C-MAPD-E requirements.
6.How does Aetrix verify that AT24C08C-MAPD-E is sourced from the original manufacturer or authorized distributors?
All AT24C08C-MAPD-E 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 AT24C08C-MAPD-E meets industry standards.
7.What is the process for return or replacement of AT24C08C-MAPD-E?
All AT24C08C-MAPD-E units undergo pre-shipment inspection (PSI). If there is an issue with AT24C08C-MAPD-E, 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 AT24C08C-MAPD-E part is unused and in its original packaging.
Return procedure for AT24C08C-MAPD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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