ACR122U - USB NFC Reader


NFC Contactless Smart Card Reader with USB interface.

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The ACR122U NFC Reader is a PC-linked contactless smart card reader/writer developed based on 13.56 MHz Contactless (RFID) Technology. Compliant with the ISO/IEC18092 standard for Near Field Communication (NFC), it supports not only MIFARE® and ISO 14443 A and B cards, but also all four types of NFC tags.

ACR122U is compliant with both CCID and PC/SC. Thus, it is a plug-and-play USB device allowing interoperability with different devices and applications. With an access speed of up to 424 kbps and a full USB speed of up to 12 Mbps, ACR122U can also read and write more quickly and efficiently. The proximity operating distance of ACR122U is up to 5 cm, depending on the type of contactless tag in use.

The ACR122U NFC Reader is ideal for both secure personal identity verification and online micro-payment transactions. Other applications of the ACR122U include access control, e-payment, e-ticketing for events and mass transit, toll road fare collection and network authentication.

Technical Specifications:

• USB 2.0 Full Speed Interface
• CCID Compliance
• Read/Write speed of up to 424 kbps
• Built-in antenna for contactless tag access, with card reading distance of up to 50 mm (depending on tag type)
• Support for ISO 14443 Part 4 Type A and B cards, MIFARE, FeliCa and all four types of NFC (ISO/IEC 18092) tags
• Built-in anti-collision feature (only one tag is accessed at any time)
• Supports PC/SC
• Supports CT-API (through wrapper on top of PC/SC)
• User-controllable bi-color LEDs
• User-controllable buzzer
• USB Firmware Upgradability
• Supports Android™ OS 3.1 and above



API Manual ACR122U

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Datasheet ACR122U

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