Adafruit
13.56MHz RFID/NFC Card - NTAG203 Chip
This blank 13.56 MHz RFID/NFC card contains an NTAG203 chip with 144 bytes of writable EEPROM storage. The standard credit-card-sized form factor makes it su...
This blank 13.56 MHz RFID/NFC card contains an NTAG203 chip with 144 bytes of writable EEPROM storage. The standard credit-card-sized form factor makes it suitable for access badges, information sharing, and NFC prototyping. The embedded chip and antenna are passively powered — no battery is needed.
The NTAG203 is a "Type 2" NFC tag that works with virtually any NFC-enabled smartphone (Android or iPhone) without proprietary licensing issues. Unlike Mifare Classic tags, NTAG-based tags avoid NXP patent restrictions and are supported by all modern phones.
Key Features
- NTAG203 Chip – 144 bytes of writable EEPROM in 4-byte banks, 10,000+ write cycles
- Permanent 7-Byte UID – Factory-burned unique serial number for identification (cannot be changed)
- Universal Smartphone Compatibility – Type 2 NFC tag, works with all NFC-enabled phones
- Standard Card Size – Credit-card form factor for badge holders and wallets
- Passive Operation – No battery required; powered by the reader's RF field
Specifications
- Frequency – 13.56 MHz
- Chip – NTAG203
- Standard – ISO/IEC 14443 Type A
- NFC Type – Type 2
- Memory – 144 bytes writable EEPROM
- Write Endurance – 10,000+ cycles
- UID – 7-byte permanent serial number
- Form Factor – Standard credit card size
Ideal For
- NFC business cards and information sharing (URLs, vCards, Wi-Fi credentials)
- Access control and identification badges
- NFC reader/writer prototyping and testing
- Attendance and event tracking systems
Package Contents
- 1× RFID/NFC Card (NTAG203)
Jargon buster
Plain-language definitions for the technical terms used above.
- EEPROM
- A type of non-volatile memory that keeps stored data even when power is turned off. In a sensor module, it can be used to store settings or calibration data so they do not need to be re-entered every time.
- RF
- RF means radio frequency, referring to signals used for wireless communication and other high-frequency electronics. A low-noise, stable power supply is important for RF circuits because power noise can affect signal quality and measurements.
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