The ACR122U NFC Reader is a PC-linked contactless smart card reader/writer developed based on the 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.

In order to increase the security level, ACR122U can be integrated with an ISO 7816-3 SAM slot. Furthermore, the ACR122U NFC Reader is available in module form, permitting easy integration into bigger machines, such as POS terminals, physical access systems and vending machines.

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.

  • USB 2.0 Full Speed Interface
  • CCID Compliance
  • Smart Card Reader:
    • Read/write speed up to 424 kbps
    • Built-in antenna for contactless tag access, with card reading distance of up to 50 mm (depending on tag type)
    • Supports ISO 14443 Type A and B cards, Mifare, FeliCa, and all 4 types of NFC (ISO/IEC 18092) tags
    • Built-in anti-collision feature (only 1 tag is accessed at any time)
  • Application Programming Interface:
    • Supports PC/SC
    • Supports CT-API (through wrapper on top of PC/SC)
  • Peripherals:
    • User-controllable bi-color LED
    • User-controllable buzzer
  • e-Government
  • Banking & Payment
  • Network Security
  • Access Control
  • e-Purse & Loyalty
  • Transportation
Dimensions 98 mm (L) x 65 mm (W) x 12.8 mm (H)
Weight 70 g
Interface USB Full Speed
Operating Distance Up to 50 mm (depends on the tag type)
Supply Voltage Regulated 5V DC
Supply Current 200mA (operating); 50mA (standby); 100mA (normal)
Operating Temperature 0-50 °C
Operating Frequency 13.56 MHz
Smart Card Interface Support
  • ISO14443 Type A & B
  • Mifare
  • FeliCa 
  • 4 types of NFC (ISO/IEC18092) tags
Compliance / Certifications
  • ISO 14443, CE, FCC, KC, VCCI, PC/SC, CCID, RoHS, USB Full Speed
  • Microsoft WHQL: 2000, XP, Vista, 7, 8, Server 2003, Server 2008, Server 2008 R2, Server 2012
Operating System Support
  • Win98, Win ME, Win NT 4.0, Win 2000, Win 2003, Win 2003 R2, Win XP, Win Vista, Win 2008, Win 7, Win 8
  • Win 2003 x64, Win 2003 R2 x64, Win XP x64, Win Vista x64, Win 2008 x64, Win 2008 R2 x64, Win 7 x64, Win 8 x 64, Win 2012 x64
  • Windows CE 5.0 and 6.0
  • Mac
  • Linux
  • Android™ 3.1 and above

Drivers for ACR122U

Release Date Drivers OS Support Version File Size Notes
USB Interface
22-Aug-2014 MSI Installer for PC/SC Driver Win 2000, Win XP, Win Vista, Win 7, Win 8, Win 8.1, Win Server 2003, Server 2003 R2, Win Server 2008 4.0.4.0 3 MB
22-Aug-2014 MSI Installer for PC/SC Driver Win XP x64, Win Vista x64, Win 7 x64, Win 8 x64, Win 8.1 x64, Win Server 2003 x64, Win Server 2003 R2 x64, Win Server 2008 x64, Win Server 2008 R2 x64, Win Server 2012 x64, Win 2012 R2 x64 4.0.4.0 2 MB
21-Aug-2014 PC/SC Drivers Win 2000, Win XP, Win XP x64, Win Vista, Win Vista x64, Win 7, Win 7 x64, Win 8, Win 8 x64, Win 8.1, Win 8.1 x64, Win Server 2003, Win Server 2003 x64, Win Server 2003 R2, Win Server 2003 R2 x64, Win Server 2008, Win Server 2008 x64, Win Server 2008 R2 x64, Win Server 2012 x64, Win Server 2012 R2 x64 4.0.0.4 619 KB
03-Jul-2014 PC/SC Drivers Linux, Mac 10.5, Mac 10.6, Mac 10.7, Mac 10.8, Mac 10.9 1.0.8 368 KB
04-Jul-2014 PC/SC Driver Package Linux 1.0.8 2 MB
03-Jul-2014 PC/SC Driver Installer Mac 10.5, Mac 10.6, Mac 10.7, Mac 10.8, Mac 10.9 1.0.8 418 KB
12-Sep-2011 CT-API Library Win 2000, Win XP, Win XP x64, Win Vista, Win Vista x64, Win 7, Win 7 x64, Win 8, Win 8 x64, Win 8.1, Win 8.1 x64, Win Server 2003, Win Server 2003 x64, Win Server 2003 R2, Win Server 2003 R2 x64, Win Server 2008, Win Server 2008 x64, Win Server 2008 R2 x64, Win Server 2012 x64, Win Server 2012 R2 x64 1.0.0.1 2 MB
12-Sep-2011 CT-API Library Linux 1.0.0 62 KB
12-Sep-2011 CT-API Library Mac 10.5, Mac 10.6, Mac 10.7, Mac 10.8, Mac 10.9 1.0.0 35 KB
30-Jun-2014 ANDROID Library Android 3.1 and above 1.1.2 716 KB

Manuals / Datasheets for ACR122U

Product Presentation

Product Presentation of ACR122U NFC Contactless Smart Card Reader

Technical Specification

Technical Specification of ACR122U NFC Contactless Smart Card Reader

Application Programming Interface

API Driver Manual of ACR122U NFC Contactless Smart Card Reader