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-III L


BDS/GPS Precision Timing Module

Brief Introduction

UM220-III L is a BDS/GPS dual-system timing module designed for Precise Timing application areas such as Telecommunication, Electrical Power. This module is developed by Unicore based on its Low power GNSS SoC- HumbirdTM. UM220-III L provides high integration ability, stable and reliable timing support, is suitable for large volume GNSS Timing applications.

Product Characteristics

• Precision Timing, better than 20nm 1PPS output
Support Static Timing and Position Timing
Support timing data protocol, and command control
Compact design, small size (17x22.4x2.4mm)
Compatible with main stream GNSS timing board solutions
SMD surface-mount technology makes it easy for users production

Data Manual

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Technical Index

Performance Specifications

Channel Based on 64-Channel SoC Humbird Timing Accuracy(ns) 1PPS 20ns(1σ)
Frequency BD B1 Timing Reference Customizable 1PPS timing reference
GPS L1 Support UTC, BDS, GPS time
Timing Modes Position (Single System Positioning and Multi-System Positioning) Positioning Accuracy 2.5m CEP(Dual System)
Static (User Input Position) 2.0m CEP(SBAS)*
Support Single Satellite Timing Velocity Accuracy(RMS) GNSS/GPS: 0.1m/s
Time to First Fix(TTFF) Cold Start : 30s BDS:0.2m/s
Hot Start : 1s 1PPS * 20ns 
Recapture : <1s Update Rate 1Hz

Physical Specifications

Dimensions 17 x 22.4 x 2.4mm
Package 28 pin SMD
Temperature Operating: -40°C~+85°C
Storage: -45°C~+90°C

Electrical Specifications

Voltage 2.7 ~ 3.6 VDC
LNA 2.7V~3.3V, <100mA
Power Consumption* 120mW

Functional Ports

1 x UART(TTL )
1 x 1PPS
Data Output NMEA 0183(BDS compatible), Unicore

Note: Part marked with * is customizable

Application Area