en
sign in
logout
CN
Email Us
UM621

UM621

Automotive-grade Dual-frequency Multi-GNSS Integrated Positioning Module

UM621 is a GNSS dual-frequency + MEMS integrated navigation module developed by Unicore Communications. Based on the proprietary multi-system dual-frequency high-performance SoC-UC6580I, and equipped with a 6-axis MEMS device, the module supports multi-system dual-frequency joint positioning or single-system standalone positioning, and can directly output GNSS + MEMS integrated positioning results, which ensures the continuity of positioning even in tunnels or underground parking lots.


Ordering Information
Supply at multiples of 500 pieces

gps module

Product Characteristics

  • Industrial grade dual-frequency GNSS+MEMS integrated navigation and positioning module

  • Supports GPS L1 C/A, L5; BDS B1I, B1C*, B2a; GLONASS G1; Galileo E1, E5a; NavIC L5*; QZSS and SBAS

  • Supports multi-system dual-frequency positioning, multi-system single-frequency positioning or single-system standalone positioning

  • Built-in MEMS to output integrated positioning results with a single module

  • Supports odometer pulse input

  • Supports the output of integrated positioning results and GNSS-only positioning results through one serial port

  • 100% continuous navgation even in tunnels or underground parking lots

  • Algorithm adaptable to low-dynamic application scenarios



Technical Specifications

Performance Specifications


Channel
96 channels, based on UFirebird II
FrequencyGPS L1C/A, L5
BDS B1I, B1C*, B2a
GLONASS G1
Galileo E1, E5a
NavIC L5*
QZSS L1, L5
SBAS

Positioning Mode

Single-System Standalone Positioning

Multi-System Joint Positioning

Time to First Fix (TTFF)1Cold Start: < 26 s
Hot Start: < 2 s
Re-acquisition: < 2 s
Positioning Accuracy(CEP)2

Horizontal: 1.5 m (Dual-frequency quad-system, open sky)

Positioning Error of INS only

3D gyro error + 3D accelerometer error + speed signal error 2% × driving distance

Velocity Accuracy(RMS)30.1 m/s (GNSS)
1PPS20ns
SensitivityGNSS
Tracking           -162 dBm
Cold Start        -148 dBm
Hot Start          -158 dBm
Reacquisition   -160 dBm

GNSS Data Update Rate

1 Hz / 5 Hz* / 10 Hz*

INS Data Update Rate

50 / 100 Hz

Data Format

NMEA 0183, Unicore



Physical Specifications

Dimensions

12.2 x 16.0 x 2.4 mm

Package

24 pin SMD

Temperature

Operating -40 °C ~ +85 °C

Storage -40 °C ~ +85 °C


Electrical Specifications

Voltage2.7V ~ 3.6 V DC
LNA2.7V ~ 3.3 V, <100 mA
Power Consumption4168 mW


Functional Ports

2 × UART (LVTTL) 
1 × I2C
1 × SPI
1 × SPEED
1 × FWD
1 × 1PPS (LVTTL)


Functional Characteristics

Passive Antenna, Active Antenna
AGNSS*

Note: Items marked with * are only supported by specific firmware.

1 Open sky

2 Typical value, < 30 m/s open sky

3 68% at 30 m/s for dynamic operation，open sky

4 Open sky, continuous tracking



Download

UM621_Product_Brief_EN
11/03/2025
VIEW
UM621 Series Modules_User Manual_EN_R2.2
30/08/2024
VIEW
UM621 Series_Hardware Reference Design_EN_R2.2
30/08/2024
VIEW
UFirebirdII Series Protocol Specification_EN_R1.4
22/08/2025
VIEW
CONTACT
Subscribe
Subscribe to get news updates from us
CONTACT
Subscribe
Subscribe to get news updates from us
High Precision Products
Standard Precision Products
Automotive Applications
Industry Applications
IoT and Consumer Applications
Quick Links
Copyright © Unicore Communications，Inc. All Rights Reserved.
Sitemap Privacy Policy
We use cookies to allow our website to function properly, personalize content，advertising, and analyze traffic. Respect for your privacy is central to our policy. Detailed information about our privacy and cookie policy can be found in the enclosed sections. Thanks in advance for your cooperation. More info...
Reject Accept