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UN20 Serial


Technical Specifications | Developer Kit


UN20 Serial is an advanced, stand-alone fingerprint recognition system that captures and stores fingerprint data and identifies or verifies registered users.

Designed as an all-in-one system that functions entirely without an external PC, the UN20 Serial can be integrated into products such as handheld devices, access control units, door locks, ATMs, point of sale equipment, and industrial equipment.

The UN20 Serial boasts the following features integrated into a single ultra-compact fingerprint optic module:

  • The U20 sensor, SecuGen’s ruggedized FAP 20 certified, high image quality fingerprint sensor that is FBI Certified for PIV Single Finger Capture Device and Mobile ID FAP 20 Compliant
  • An open Linux platform that facilitates the development of custom applications
  • Libraries that utilize SecuGen’s extremely fast NIST MINEX-compliant fingerprint template generator and matching algorithms

The UN20 Serial communicates with external devices through a CMOS serial interface and is interoperable with data input from SecuGen USB fingerprint readers for a wide variety of implementations.

The UN20 Serial includes SecuGen's Fingerprint Management System (FMS), a listener application that responds to serial commands that use the same protocol supported by SecuGen’s SDA04Px OEM module.

UN20 SERIAL (front and back views)


Technical Specifications

CPU MIPS 32bit 1GHz
Flash Memory 80 MB NAND
Operating System

Linux Kernel 3.10.14

Boot Time 1.5 seconds
User Capacity 5,000 users (1:1 or 1:N)
Fingerprint Capture Time ~0.4 second with Smart Capture
Minutiae Extraction Time ~0.3 second
Matching Time ~0.3 second
Supply Voltage 3.3V DC regulated
Current Consumption 60 mA (idle), 100 mA (operating)
Communication Speed 1200 ~ 921600 bps (CMOS Level Serial)
Image Resolution 500 DPI
Image Size 300 x 400 pixels
Platen Size 18.2 mm x 22.9 mm
Effective Sensing Area 15.24 mm x 20.32 mm
Dimensions (L x W x H) / Weight

33.9 x 49.0 x 22.3 mm / 24 g

Supported Fingerprint Templates SecuGen Proprietary, ANSI INCITS 378-2004, and ISO/IEC 19794-2 formats
FAR and FRR Read our FAQs
Other Features Auto-On™, Smart Capture
Compliance RoHS

UN20 Serial Developer Kit
(Sold separately)

The UN20 Serial Developer Kit includes all the hardware and software needed to integrate the UN20 Serial into a wide variety of “embedded fingerprint” applications. Development tools in the DK require Ubuntu Linux 14.04 64bit or Fedora 23 64bit development platform, with GNU tools installed. The Developer Kit also includes APIs and data conversion modules to help expand the capabilities of your fingerprint biometric system with the following functions:

  • Register, update and delete user profiles
  • Verify or identify user
  • Manage user database
  • Control system settings (brightness, exposure, gain, security levels, quality threshold, etc.)
  • Test all functions
  • Interface with PC and SecuGen USB fingerprint readers

UN20 Developer Kit Components

Developer Kit Includes:

  1. UN20 Serial module with MIPS CPU, RAM and Flash Memory
  2. Development board with RS232 DB9 connector, LEDs, GPIO buttons and RESET button
  3. 9PIN Molex cable to connect UN20 Serial to development board
  4. USB cable to connect UN20 Serial to host Linux PC for programming using TCP/IP over USB connection
  5. UN20 Serial software:
    • SDATest Demo Program (Windows 10 / 8 / 7)
    • Sample fingerprint template database (3,000 users)
    • Documentation
    • C# Sample Source Code (Windows 10 / 8 / 7)



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