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Microchip Technology AT24RF08CN-10SC
- Part No.:
- AT24RF08CN-10SC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24RF08CN-10SC.pdf
- Description:
- IC EEPROM 8KBIT I2C 100KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,605
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Product details
Overview
AT24RF08CN-10SC from Microchip Technology is a dual-port nonvolatile memory IC integrating 8K-bit EEPROM with simultaneous RFID (125 kHz) and I²C-compatible serial interfaces. It features block-level access protection, ultra-low-power RFID writes (25 µA), 16-byte page write capability (10 ms), and operates from 2.4V to 5.5V across –40°C to +85°C - deployed in asset tracking tags where battery-free remote configuration and tamper-aware memory are required.
For engineers reviewing the AT24RF08CN-10SC datasheet, AT24RF08CN-10SC pinout, AT24RF08CN-10SC application, or AT24RF08CN-10SC equivalent, key selection criteria include dual-interface arbitration timing, coil-powered RFID write latency (5.8 ms), block/page-level protection granularity, and SOIC-8 compatibility with AT24C08 footprint exceptions on pins L1/L2/PROT.
Technical Context
The AT24RF08CN-10SC implements two independent memory access paths: an I²C interface compliant with AT24C08 protocol (device addresses A8–AFh) and a 125 kHz RFID interface powered solely via L1/L2 coil coupling. Access control is enforced per-block (blocks 1–7) and per-page (block 0), with protection state stored in a dedicated 16-byte Access Protection Page (APP) addressed at B8h/B9h.
RFID operation supports multi-tag management via header-based arbitration, ID transmission (first 12 bytes of ID page), and 12 explicit commands including Set Block/Page Latch, Read/Write Page (128-bit), Read/Write Word (32-bit), Tamper Latch set/reset, and QUIET mode control - all with Manchester-encoded CIP synchronization and error-detection fields.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbits (1024 bytes), organized as 8 blocks × 128 bytes each - enables granular data partitioning for secure firmware, calibration, and ID storage. |
| Interface Types | Dual-port: I²C-compatible serial (up to 100 kHz) and 125 kHz RFID - allows wired programming and contactless field updates without VCC. |
| RFID Write Current | 25 µA typical - enables coil-only operation with minimal field strength requirements for passive tag deployment. |
| Write Time | 10 ms for 16-byte page write (serial); 5.8 ms for EEPROM write (coil-powered RFID) - defines minimum command interval and system throughput. |
| Data Retention | 10 years at +85°C - ensures long-term reliability in industrial and outdoor asset tagging environments. |
| Endurance | 100,000 write cycles per byte - supports frequent reconfiguration in logistics or maintenance-cycle applications. |
| Supply Range | 2.4 V to 5.5 V - compatible with standard logic rails and brown-out tolerant in battery-backed systems. |
| Operating Temp | –40°C to +85°C - qualified for automotive under-hood, industrial automation, and outdoor infrastructure use cases. |
Pinout & Package
AT24RF08CN-10SC is housed in an 8-lead JEDEC-standard SOIC package (5.3 mm × 4.4 mm, 1.27 mm pitch), pin-compatible with AT24C08 except for L1, L2, and PROT functions replacing address pins A0–A2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| L1 | RFID Coil Terminal 1 | AC-coupled connection to external resonant antenna coil; enables passive RFID power harvesting and bidirectional communication. |
| L2 | RFID Coil Terminal 2 | Completes resonant LC tank with L1 and optional tuning capacitor; critical for 125 kHz carrier coupling efficiency. |
| PROT | Power-Good / Serial Reset Input | Pull-high to enable serial interface; low state resets I²C logic and sets all sticky bits - used for safe initialization and fault recovery. |
| GND | Analog/Digital Ground | Common reference for both serial and RFID domains; must be low-impedance to minimize noise coupling into coil interface. |
| VCC | Supply Voltage Input | Primary power source for serial interface and internal logic; device operates fully from 2.4–5.5 V with no external regulators required. |
| WP | Hardware Write Protect | Active-high input that disables all serial write operations - provides physical lock against accidental or malicious firmware overwrite. |
| SCL | I²C Clock Input | Open-drain input synchronized to master clock; supports standard-mode (100 kHz) I²C timing; not guaranteed at 400 kHz. |
| SDA | I²C Data I/O | Open-drain bidirectional line; shares bus with other AT24C08-compatible devices using A8–AFh addressing. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Port Memory Arbitration | Simultaneous I²C and RFID access with conflict resolution - prevents data corruption during concurrent reads/writes across interfaces. |
| Block- and Page-Level Protection | Independent read/write locks per block (1–7) and per 16-byte page (block 0), stored in EEPROM-persistent Access Protection Page - enforces secure separation of user data, ID, and configuration. |
| Coil-Powered RFID Writes | 25 µA typical current draw during 125 kHz RFID write - enables true battery-free field updates in sealed or inaccessible assets. |
| Tamper Latch with Dual-Port Control | Tamper bit settable only via RFID command; resettable only via serial port in <10 ms - provides auditable, irreversible event logging with controlled clearing. |
| ID Page Lock Bit | MSB of last ID page byte controls RFID-write lock on entire 16-byte ID region - prevents unauthorized tag cloning while allowing serial-side ID provisioning. |
| Multi-Tag Collision Management | Header-based arbitration with random delay, ACK pulse detection, and QUIET mode - supports reliable identification and command targeting in dense RFID fields (e.g., palletized inventory). |
Applications
| Asset Tracking Tag | Industrial Calibration Module |
|---|---|
Use Scenario: Passive RFID tag embedded in high-value equipment (e.g., medical imaging devices, test instruments) for lifecycle logging and service history. IC Role / Device Role / Timing Role: Dual-port EEPROM storing unique ID, firmware version, calibration coefficients, and tamper events - accessed wirelessly for audit and locally for diagnostics. Use Value: Eliminates need for battery or connector; coil-powered writes enable field updates without opening enclosures; block protection isolates sensitive calibration data from general-purpose logs. | Use Scenario: Factory-calibrated sensor module requiring post-deployment coefficient updates and revision tracking in harsh environments. IC Role / Device Role / Timing Role: Nonvolatile memory holding sensor-specific gain/offset values, temperature compensation tables, and production date - written once at factory, updated remotely via RFID if recalibration needed. Use Value: 10-year retention and 100K endurance ensure stability over product lifetime; WP pin and PROT-controlled reset prevent accidental corruption during field servicing. |
| Secure Access Credential | Automotive Aftermarket Module |
Use Scenario: Contactless smart key fob or access card storing encrypted credentials and usage counters. IC Role / Device Role / Timing Role: Tamper-aware memory holding cryptographic keys, session counters, and lockout flags - protected against physical probing and unauthorized RFID writes. Use Value: Tamper latch set via RFID and cleared only via serial interface creates verifiable event chain; ID page lock prevents credential cloning; 125 kHz range supports short-range secure proximity authentication. | Use Scenario: Retrofit telematics or diagnostic adapter installed in vehicle OBD-II port, requiring persistent VIN, DTC history, and firmware patch storage. IC Role / Device Role / Timing Role: Dual-interface EEPROM retaining vehicle-specific parameters and update logs - programmed via CAN-connected tool (serial) and verified via handheld RFID reader (wireless). Use Value: SOIC-8 footprint simplifies PCB integration; –40°C to +85°C rating matches automotive under-dash conditions; coil-powered writes allow updates without ignition power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-interface EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24RF08BN-10SU | Same die, 8-lead TSSOP package (3 × 4.4 mm); identical electrical specs and pinout mapping but smaller footprint and different thermal profile. | Better suited for space-constrained PCBs where SOIC height or solder joint reliability is a concern; same coil interface and protection architecture. | Select when board area is limited or automated optical inspection favors TSSOP; verify coil layout clearance for TSSOP body size. |
| ST25DV04KC-IE6T | 4-Kbit I²C + NFC (13.56 MHz) EEPROM; supports ISO15693, not 125 kHz RFID; integrated RF field detector; no coil terminals - uses internal antenna coupling. | Targets NFC-enabled smartphones and tablets instead of legacy 125 kHz readers; lacks coil-driven passive write capability and multi-tag arbitration. | Choose for consumer-facing or mobile-integrated applications; avoid when backward compatibility with existing 125 kHz infrastructure or ultra-low-power coil writes is required. |
Compared with AT24RF08BN-10SU, the AT24RF08CN-10SC offers identical functionality in a larger SOIC package better suited for manual assembly and high-vibration environments; versus ST25DV04KC-IE6T, it delivers true 125 kHz passive operation with lower field strength requirements but lacks NFC smartphone compatibility.
Availability
AT24RF08CN-10SC is available at Aetrix Electronics and suitable for asset tracking, industrial calibration modules, secure access credentials, and automotive aftermarket modules requiring stable component supply across extended temperature ranges and dual-interface flexibility.
Supply support for AT24RF08CN-10SC 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 components, and secure memory solutions, with broad industrial and automotive qualification coverage.
The AT24RF08CN-10SC belongs to Microchip's RFID-enabled EEPROM product line, designed specifically for applications demanding contactless memory access, tamper evidence, and robust dual-port security in harsh or inaccessible environments.
FAQ
What is the primary function of the PROT pin on the AT24RF08CN-10SC?
The PROT pin on the AT24RF08CN-10SC serves as a power-good signal and serial interface reset control. When pulled low, it holds the I²C interface in reset and sets all CMOS sticky bits to '1', preventing unintended access during power-up or brown-out conditions. When high, serial bus activity is enabled - this behavior is documented in the "Device Access" section of the AT24RF08CN-10SC datasheet and is essential for deterministic initialization sequencing.
Can the AT24RF08CN-10SC perform RFID writes without VCC applied?
Yes, the AT24RF08CN-10SC supports full RFID read and write operations with VCC = 0 V, powered exclusively through the L1/L2 coil terminals at 125 kHz. EEPROM writes consume only 25 µA typical current in this mode, and completion time is 5.8 ms - confirmed in the "EEPROM Organization" and "RFID Port Operation" sections of the AT24RF08CN-10SC datasheet.
How does access protection work for block 0 versus other blocks in the AT24RF08CN-10SC?
In the AT24RF08CN-10SC, blocks 1–7 support only block-level protection (read/write enable per block), while block 0 adds eight 16-byte page-level write protection bits stored in byte 9 of the Access Protection Page. This allows fine-grained locking of individual pages within block 0 - such as separating ID fields from configuration data - whereas other blocks are protected only at the full 128-byte level.
What is the purpose of the tamper latch in the AT24RF08CN-10SC, and how is it controlled?
The tamper latch in the AT24RF08CN-10SC is a single-bit EEPROM flag set exclusively via RFID command ("Set EEPROM Tamper Latch") and resettable only through the serial interface in under 10 ms. Its value is stored in bit 0 of byte 10 in the Access Protection Page and provides auditable, irreversible indication of physical or logical tampering - a core security feature of the AT24RF08CN-10SC design.
Is the AT24RF08CN-10SC pin-compatible with standard AT24C08 EEPROMs?
The AT24RF08CN-10SC is partially pin-compatible with AT24C08: pins 4–8 (GND, VCC, WP, SCL, SDA) match functionally and electrically, but pins 1–3 (L1, L2, PROT) replace AT24C08's A0–A2 address inputs. This means existing AT24C08 footprints require minor PCB modification - specifically rerouting of A0–A2 nets to accommodate coil connections and PROT control - as explicitly stated in the AT24RF08CN-10SC General Overview section.
AT24RF08CN-10SC 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:
- 8Kbit
- Memory Organization:
- 1K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 100 kHz
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- 450 ns
- Voltage - Supply:
- 2.4V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24RF08CN-10SC FAQ
1.How can I place an order for AT24RF08CN-10SC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24RF08CN-10SC 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 AT24RF08CN-10SC reliable?
The price and inventory of AT24RF08CN-10SC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24RF08CN-10SC is usually 5 days.
3.What payment methods are accepted for AT24RF08CN-10SC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24RF08CN-10SC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24RF08CN-10SC?
AT24RF08CN-10SC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24RF08CN-10SC 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 AT24RF08CN-10SC?
For technical support, including AT24RF08CN-10SC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24RF08CN-10SC requirements.
6.How does Aetrix verify that AT24RF08CN-10SC is sourced from the original manufacturer or authorized distributors?
All AT24RF08CN-10SC 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 AT24RF08CN-10SC meets industry standards.
7.What is the process for return or replacement of AT24RF08CN-10SC?
All AT24RF08CN-10SC units undergo pre-shipment inspection (PSI). If there is an issue with AT24RF08CN-10SC, 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 AT24RF08CN-10SC part is unused and in its original packaging.
Return procedure for AT24RF08CN-10SC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24RF08CN-10SC Tags
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M24C02-WMN6TP
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