N24RF04DWPT3G - Dual Interface 4Kb EEPROM RFID NFC Tag | onsemi
MPN: N24RF04DWPT3G β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.46 | $0.46 |
| 10 | $0.44 | $4.40 |
| 100 | $0.41 | $41.00 |
| 500 | $0.38 | $190.00 |
| 1,000 | $0.35 | $350.00 |
N24RF04DWPT3G Overview
A dual-interface EEPROM tag belongs to the family of memory ICs that combine passive radio-frequency access with a wired bus. The RFID/NFC tag hierarchy runs: dual-interface EEPROM tag -> RFID transponder IC -> RF memory IC -> memory IC -> semiconductor. The N24RF04 allows a reader (contactless, energy harvesting from the RF field) and a host microcontroller (contact, externally powered) to access the same non-volatile memory, enabling board-level identification, configuration storage, and traceability.
Key features include the 4 Kb (512-byte) EEPROM organized with user and system blocks, ISO/IEC 15693 and ISO 18000-3 protocol support, NFC Forum Type 5 tag interoperability, an energy-harvesting output that can power small companion circuits, and data verification mechanisms for write integrity. The I2C interface requires an external supply and supports standard bus communication with any microcontroller, according to the onsemi N24RF04 datasheet.
Technically, the device rectifies the 13.56 MHz carrier from the reader antenna coil connected between the AC0 and AC1 pins, regulates it to an internal supply, and manages read/write cycles to the EEPROM with error checking. The dual-interface arbitration ensures memory consistency regardless of which port accesses the data, a critical feature when both a reader and an MCU may write the same blocks.
Typical applications include consumable identification and authentication in printers and medical cartridges, board-level manufacturing traceability, parameter storage for replaceable modules, and NFC-enabled configuration of industrial and IoT devices.
When designing, keep the antenna loop close to the AC0/AC1 pins and respect the I2C supply requirement: the contact interface cannot rely on harvested field energy. Choose pull-up values for SDA/SCL appropriate to the 1.8 V to 5.5 V supply domain.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for N24RF04DWPT3G β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
N24RF02DWPT3G
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
N24RF64DWPT3G
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
N24RF04DWT3G
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
N24RF04DWPT3G Specifications
| Memory Size | 4 Kb EEPROM |
| Interface | Dual interface: RF (contactless) + I2C (contact) |
| RF Frequency | 13.56 MHz |
| RF Protocol | ISO/IEC 15693, ISO 18000-3, NFC |
| I2C Supply Voltage Range | 1.8 V to 5.5 V |
| Package | 8-SOIC (0.154 in, 3.90 mm width) |
| Mounting Type | Surface Mount |
| Energy Harvesting | Yes |
| Data Verification | Yes (write verification) |
| Product Type | RFID Transponder IC / NFC Tag |
N24RF04DWPT3G Pin Configuration
| Pin 1 | VSS β Ground |
| Pin 2 | AC0 β Antenna coil connection 0 (13.56 MHz) |
| Pin 3 | AC1 β Antenna coil connection 1 (13.56 MHz) |
| Pin 4 | VSS β Ground |
| Pin 5 | VOUT β Energy-harvesting / regulated output |
| Pin 6 | SDA β I2C serial data |
| Pin 7 | SCL β I2C serial clock |
| Pin 8 | VCC β I2C interface power supply (1.8 V to 5.5 V) |
Typical Applications
N24RF04DWPT3G is suitable for 6 applications: Consumable Identification and Authentication, Board-Level Manufacturing Traceability, NFC Device Configuration and Provisioning, Replaceable Module Parameter Storage, Library and Asset Management, Medical Consumable Tracking.
Consumable Identification and Authentication
Printer ink cartridges, medical test cartridges, and industrial consumables increasingly use dual-interface EEPROM tags for authentication and usage tracking. The N24RF04DWPT3G fits this role because its 4 Kb EEPROM stores identity, lot data, and remaining-usage counters, while the dual-interface design lets both the host printer MCU (via I2C at 1.8 V to 5.5 V) and a service technician's NFC smartphone (via ISO 15693 at 13.56 MHz) read the same records. Write verification ensures stored counters remain trustworthy across thousands of cartridge checks. Because the tag is fully passive on the RF side, no battery is needed in the consumable, improving shelf life and reliability. The SOIC-8 footprint mounts directly on the consumable PCB with a small printed antenna loop on AC0/AC1.
Recommended
Board-Level Manufacturing Traceability
PCB assemblers embed tag ICs to store serial numbers, test results, and calibration dates directly on the board. The N24RF04DWPT3G is well suited because the I2C interface lets automated test equipment read and write traceability data during production, while field service or end-of-life recycling can recover the same data contactlessly with a 13.56 MHz ISO 15693 reader or NFC phone. The 4 Kb EEPROM holds ample records for component-level history, and write data verification protects against corrupted entries from marginal test-fixture power. Its 1.8 V to 5.5 V supply range matches both legacy 5 V and modern 1.8 V test systems. The compact 8-SOIC package occupies minimal board area on high-density assemblies.
Recommended
NFC Device Configuration and Provisioning
IoT and industrial devices benefit from tap-to-configure workflows where a smartphone writes Wi-Fi credentials, network parameters, or feature keys to a tag without powering the device. The N24RF04DWPT3G supports this because its RF interface is fully passive and NFC Forum Type 5 (ISO 15693/ISO 18000-3) compatible, so standard Android and iOS NFC stacks can read and write the 4 Kb EEPROM. When the host MCU is powered, the I2C interface at 1.8 V to 5.5 V retrieves the credentials at boot. Energy harvesting can even wake or bias small supervision circuits when the phone field is present. Designers should place a printed loop antenna on AC0/AC1 and position it away from metal to preserve read range.
Recommended
Replaceable Module Parameter Storage
Field-replaceable modules such as sensors, dosing heads, and battery packs carry a tag that stores calibration coefficients, operating hours, and configuration parameters. The N24RF04DWPT3G matches this use because the host reads calibration data over I2C at insertion (1.8 V to 5.5 V supply already present on the carrier), while a service tool can update or audit the module wirelessly through the 13.56 MHz ISO 15693 interface. Write verification guards parameter integrity during power transients at hot-swap, and EEPROM non-volatility retains data unpowered for the module's shelf life. The 4 Kb capacity covers dozens of multi-byte calibration records, and the small SOIC-8 body fits on even miniaturized daughter boards.
Recommended
Library and Asset Management
Item-level RFID tagging of tools, IT assets, and library media relies on ISO 15693 tags readable by fixed and handheld 13.56 MHz infrastructure. The N24RF04DWPT3G serves this market because the RF interface complies with ISO 15693 and ISO 18000-3, ensuring interoperability with standard asset-management readers, while the 4 Kb EEPROM stores UID-adjacent metadata such as location codes and maintenance flags. In readers and printers that program tags in bulk, the I2C interface at 1.8 V to 5.5 V enables fast wired programming of tag data during encoding, bypassing RF write speed limits. Data verification during EEPROM writes prevents silent encoding errors that would later break asset lookups, improving fleet data quality.
Recommended
Medical Consumable Tracking
Single-use medical devices and diagnostic cartridges require tamper-evident identification and expiry tracking. The N24RF04DWPT3G fits medical workflows because the NFC-compatible RF interface lets clinicians verify a consumable with a phone or dedicated reader before use, reading lot number and expiry from the 4 Kb EEPROM, while the manufacturer's filling equipment writes the data via I2C during production. The tag is passive and battery-free, avoiding battery shipping and disposal restrictions, and EEPROM data retention preserves records across the product's validated shelf life. Write verification and access-locking system blocks prevent overwriting of validated production data. Design the AC0/AC1 antenna to remain readable through the cartridge housing during qualification.
Recommended
Recommended Products Summary
Engineering reference data for N24RF04DWPT3G β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | N24RF02DWPT3G | N24RF64DWPT3G | N24RF04DWT3G |
|---|---|---|---|---|
| Package | 8-SOIC (3.90 mm width) | 8-SOIC (3.90 mm width) - same | 8-SOIC (3.90 mm width) - same | 8-SOIC (3.90 mm width) - same |
| Brand | onsemi | onsemi | onsemi | onsemi |
| EEPROM Size | 4 Kb | 2 Kb | 64 Kb | 4 Kb |
| RF Frequency | 13.56 MHz | 13.56 MHz | 13.56 MHz | 13.56 MHz |
| RF Protocols | ISO 15693, ISO 18000-3, NFC | ISO 15693, ISO 18000-3, NFC | ISO 15693, ISO 18000-3, NFC | ISO 15693, ISO 18000-3, NFC |
| I2C Supply Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Energy Harvesting | Yes | Yes | Yes | Yes |
Key Differentiators
- Balanced 4 Kb memory in the N24RF family (vs N24RF02DWPT3G)
- Lower cost than high-capacity variant (vs N24RF64DWPT3G)
- Full dual-interface feature set per unit cost (vs M24LR04E (ST))
Design Notes
Route the antenna as a symmetric printed loop directly between the AC0 and AC1 pins with minimal trace length; the loop inductance and series capacitance set tuning at 13.56 MHz. Keep the loop away from ground planes, metal enclosures, and battery cells, which detune the antenna and reduce read range. Provide ESD protection on the RF pins in harsh environments and keep SDA/SCL traces short with pull-up resistors sized for the selected 1.8 V to 5.5 V supply domain.
The I2C interface requires the external 1.8 V to 5.5 V supply and cannot operate from harvested field energy. In battery-powered hosts, connect the tag VCC to a rail that is present whenever the MCU needs to read parameters, and confirm SDA/SCL pull-ups are on the same rail. The VOUT energy-harvesting pin delivers only limited power - treat it as a wake or bias source for micropower circuits, never for driving the I2C bus or LEDs.
Do not assume cross-family drop-in without checking the memory map: N24RF02 and N24RF64 differ in block organization and addressing from the N24RF04, per the onsemi N24RF04 datasheet family documentation. Firmware that hard-codes block addresses may fail on family variants despite the identical SOIC-8 footprint. Also verify access-locking configuration before production, since locked system blocks on the tag cannot be rewritten in the field.
Compliance Information
Verified web data does not state explicit compliance status; confirm on the onsemi product page environmental data before regulated use.
