STMicroelectronics TESEO-LIV3F

Overview

TESEO-LIV3F from STMicroelectronics is a certified, standalone GNSS module integrating the Teseo III positioning IC with embedded 26 MHz TCXO and 32 kHz RTC, supporting simultaneous GPS/GLONASS/BeiDou/Galileo/QZSS reception, -163 dBm tracking sensitivity, 1.5 m CEP accuracy, and 16 Mbit Flash for data logging and firmware upgrades - deployed in vehicle tracking, fleet management, and emergency call systems.

For engineers reviewing the TESEO-LIV3F datasheet, TESEO-LIV3F pinout, TESEO-LIV3F application, or TESEO-LIV3F equivalent, this module delivers multiconstellation timing and position solutions with autonomous assisted GNSS, hardware/software standby modes (17 µW / 75 mW), and UART/I²C interfaces - critical for low-power, high-accuracy location-aware designs.

Technical Context

The TESEO-LIV3F implements a fully integrated GNSS receiver architecture with dedicated TCXO for stable clock generation and RTC for reduced TTFF; it supports real-time AGPS, predictive ST-AGPS (up to 14-day orbit prediction), and autonomous assisted GNSS using stored ephemeris.

Its signal chain includes RF_IN input with internal LNA, VCC_RF output for active antenna biasing, and dual power domains (VCC 2.1–4.3 V, VCC_IO 3.3 V); navigation outputs are delivered via NMEA-compliant UART and I²C, with 1PPS timing pulse referenced to UTC.

Key Specifications

Pinout & Package

Tiny LCC-18 surface-mount package (9.7 × 10.1 mm), RoHS-compliant, tape-and-reel packaging; requires reflow soldering per JEDEC J-STD-020 profile.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar standalone GNSS module applications.

Compared with NEO-M9N and L96, TESEO-LIV3F uniquely integrates predictive AGNSS, 16 Mbit Flash, and certified TCXO/RTC in a compact LCC-18 package - delivering faster TTFF, longer battery life, and regulatory-ready positioning without external components or network dependency.

Availability

TESEO-LIV3F is available at Aetrix Electronics and suitable for vehicle tracking, insurance telematics, and emergency call systems requiring stable component supply, long-term lifecycle assurance, and pre-certified GNSS functionality.

Supply support for TESEO-LIV3F includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, sensors, power management, and analog/mixed-signal ICs for automotive, industrial, and consumer markets.

TESEO-LIV3F belongs to ST's Teseo GNSS product line, engineered specifically for certified, low-power, high-accuracy standalone positioning in safety-critical and battery-operated applications - emphasizing time-to-market reduction through embedded firmware and regulatory readiness.

FAQ

Does TESEO-LIV3F require an external antenna?

Yes - TESEO-LIV3F requires connection to an external GNSS antenna via its 50 Ω RF_IN pin. It supports both passive ceramic patch antennas and active antennas powered through the VCC_RF pin (3.3 V, up to 100 mA). Antenna matching network design must follow ST's reference layout in AN5022 to maintain -163 dBm sensitivity.

Can TESEO-LIV3F operate without a host microcontroller?

No - TESEO-LIV3F is not a self-contained system; it requires a host MCU to send NMEA commands (e.g., $PSTME, $PSTMC), configure constellations, manage firmware updates, and process navigation outputs. However, it performs all GNSS baseband processing, timing, and ephemeris prediction autonomously.

What is the role of the Vbatt pin?

Vbatt supplies backup power (1.8–4.3 V) exclusively to the internal RTC and SRAM holding AGNSS prediction state. When main VCC is removed, Vbatt preserves timekeeping and ephemeris history - enabling hot starts and maintaining up to 5-day autonomous prediction capability without network access.

Is TESEO-LIV3F compliant with EU eCall regulations?

Yes - TESEO-LIV3F is CE-certified per EN 303 413 and supports the mandatory eCall functional requirements: 100 m horizontal accuracy (CEP), ≤5 s TTFF, UTC-synchronized 1PPS output, and operation from -40°C to +85°C. Full eCall system compliance requires integration with a certified GSM module and crash sensor per UNECE R156.