The accuracy of Unicore GNSS receivers ranges all the way from meter, though sub-meter and centimeter, down to the millimeter level.

Using our own unique technology Unicore has successfully developed and fielded series of multi-system, multi-frequency, high-performance System on a Chip (SoC), and a range of high-precision, board-level GNSS receivers and navigation/timing modules.

Applications include Continuously Operating Reference System (CORS) reference stations, survey & mapping, precision agriculture, positioning & heading, vehicle monitoring, autonomous vehicle navigation, and precision timing – along with a number of other

Unicore is a one-stop provider of GNSS SoC chips and GNSS receivers, with extensive experience in the design, verification, development, implementation and production of highly integrated ICs, along with multi-system high-performance GNSS baseband algorit

Unicore Communications, Inc. is a technology company focused on the design & development of highly integrated ICs, algorithms and GNSS receivers.

Home > Product Center > UM220-IV M

UM220-IV M

Compact GNSS Navigation Positioning Module

Brief Introduction

UM220-IV M is a multi-system compact navigation module designed for the automotive market. As the fourth generation GNSS navigation and positioning module, UM220-IV M is based on the proprietary GNSS SoC UC5225 Firebird. Due to the high intergration, low power consumption, anti-interference and compact design, UM220-IV M is ideal for applications requiring excellent performance and accurate positioning. 

Product Characteristics

• Super samll packaging

• GPS/BDS dual-system and single system

• Eligible for large-scale applications that demand high performance, small size and low cost.

Application Fields

• Tracker

• Vehicle Navigation

Data Manual

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Technical Index

Performance Specifications

Channel Based on 64-Channel
Time to First Fix Cold Start: <29s
AGNSS: <5s
SoC-UFirebrid (TTFF) Hot Start: 1s
Reacquisition: <1s
Update Rate 1 Hz
GPS L1 Positioning Accuracy 2.0m CEP (Dual-System)
Single System Positioning
Velocity Accuracy(RMS) GNSS/GPS: 0.1m/s
BDS: 0.2m/s
Multi-System Positioning 1PPS Support

Cold Start -144dBm -146dBm
Hot Start -151dBm -151dBm
Tracking -160dBm -1600dBm
Reacquisition -156dBm -157dBm

Physical Specifications

18 pin SMD 
Operating -40℃~+85℃
Storage -40℃~+90℃

Electrical Specifications

Voltage 2.8V~3.6V DC
LNA 2.7V~3.3V, <100mA
Power Consumptions 63mW

Functional Ports


Functional Specification

Passsive Antenna, Active Antenna

Data ports: NMEA 0183 (conpatible with BEIDOU) Unicore

Note: * refers to the optional configuration

            1Typical conditions, <30m/s open sky

            2Open sky, continuous tracking

            3Open sky

            4Running three systems at most simultaneously

Application Area