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.

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.

The ACR122U comes with an optional stand to hold the smart card reader at an optimal angle, so that users can tap contactless cards or NFC-enabled devices onto the ACR122U with ease. For more information, click here to download the brochure of this special accessory.

The ACR122U USB NFC Reader has been counterfeited by certain law-breaking parties. We issue the following declaration to inform our stakeholders of how we are addressing this issue, and to inform customers on how they can protect themselves against illegal products. For more information, please click here.

STD019_ACR122

PC-Linked USB Contactless Reader NFC Reader
  • 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
  • Supports Android™ OS 3.1 and above
Dimensions 98.0 mm (L) x 65.0 mm (W) x 12.8 mm (H)
Weight 70.0 g
Compliance / Certifications
  • ISO 18092, ISO 14443, PC/SC, CCID, EN60950/ISO 60950, CE, FCC, MIC, KC, VCCI,  RoHS 2,  USB Full Speed, Microsoft® WHQL
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
Operating System Support
  • Windows®
  • Win CE 5.0 and 6.0
  • Linux®
  • Mac OS®
  • Android™ 3.1 and above
Drivers for ACR122U OS Support
USB Interface
MSI Installer for PC/SC Driver  5 MB
Version 4.2.6.1
11-Oct-2017
Windows® XP, Windows® Vista, Windows® 7, Windows® 8, Windows® 8.1, Windows® 10, Windows® Server 2003, Windows® Server 2008, Windows® Server 2008 R2, Windows® Server 2012, Windows® Server 2012 R2, Windows® Server 2016 R2
MSI Installer for PC/SC Driver  5 MB
Version 4.0.6.0
14-Nov-2014
Windows® 7 (for users who did not install required Microsoft Windows Updates and get driver signature error (Code 52))
PC/SC Drivers  921 KB
Version 4.2.6.0
14-Sep-2017
Windows® XP, Windows® Vista, Windows® 7, Windows® 8, Windows® 8.1, Windows® 10, Windows® Server 2003, Windows® Server 2008, Windows® Server 2008 R2, Windows® Server 2012, Windows® Server 2012 R2, Windows® Server 2016 R2
PC/SC Drivers  371 KB
Version 2.0.1.0
23-Nov-2015
Windows® CE 5.0, Windows® CE 6.0, Windows® CE 7.0
PC/SC Driver Package  2 MB
Version 1.1.5
27-Oct-2017
Linux ®
PC/SC Driver Installer  251 KB
Version 1.1.5
23-Oct-2017
Mac 10.5, Mac 10.6, Mac 10.7, Mac 10.8, Mac 10.9, Mac 10.10, Mac 10.11, Mac 10.12. Mac 10.13
PC/SC Drivers  455 KB
Version 1.1.5
23-Oct-2017
Linux®, Mac OS® X
CT-API Library  2 MB
Version 1.0.1.1
23-Jan-2017
Windows® XP, Windows® Server 2003, Windows® Vista, Windows® Server 2008, Windows® Server 2008 R2, Windows® 7, Windows® 8, Windows 8.1, Windows® Server 2012, Windows® Server 2012 R2, Windows® 10
CT-API Library  261 KB
Version 1.0.1
23-Jan-2017
Linux®, Mac OS® X 10.5, Mac OS® X10.6, Mac OS® X10.7, Mac OS® X10.8, Mac OS® X10.9
Android EVK  472 KB
Version 1.1.3
31-Mar-2016
Android 3.1 and above



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