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# SparkFun GNSS Timing Breakout - ZED-F9T-20B (Qwiic)

**Type:** Product page · **SKU:** GPS-30975 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/sparkfun-gnss-timing-breakout-zed-f9t-20b-qwiic.html ([markdown](https://core-electronics.com.au/sparkfun-gnss-timing-breakout-zed-f9t-20b-qwiic.html.md))

This timing breakout provides 5ns timing accuracy, multi-band reception and Qwiic connectivity for synchronised systems.

## Pricing

- **Price:** $564.71 (inc GST) — $513.37 AUD, exc GST

## Availability & dispatch

- Available with a lead time — expect dispatch between Sep 07 and Sep 11.

## Restrictions

Restrictions apply to this equipment as it uses button/coin cell batteries:

- The equipment is intended to be used in trades, professions or industries
- The equipment is not intended for sale to the general public
- The equipment is not intended to be used where children are present
- You are aware that this equipment may not meet child safety testing requirements as it is not intended to be used by consumers or general public, but rather, is intended to be used in trades, professions or industries in conjunction with the limitations and restrictions listed above
- You are aware that these restrictions are due to a change in [A](https://www.accc.gov.au/media-release/businesses-on-notice-as-mandatory-button-battery-laws-commence)[ustralian legislation in 2022](https://www.accc.gov.au/media-release/businesses-on-notice-as-mandatory-button-battery-laws-commence) for button/coin cell batteries
 
![Button Battery Warning](https://core-electronics.com.au/attachments/uploads/iec-button-battery.png)

A declaration of use will need to be submitted during checkout.

## How to buy

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## Description

The SparkFun GNSS Timing Breakout is a specialised tool designed for applications where time is just as critical as position. Featuring the u-blox ZED-F9T-20B GNSS receiver, this board offers an impressive five nanoseconds of timing accuracy under clear skies without requiring any external GNSS correction data. Whether you are maximising the efficiency of a 5G IoT network, synchronising a distributed sensor grid, or building a high-precision NTP server, this breakout provides the ultra-accurate time reference you need.

#### Multi-Band Reliability

The ZED-F9T-20B is a top-of-the-line multi-band module that supports L1, L2/L5, and E5a/E5b bands across major constellations (GPS / QZSS, Galileo, BeiDou, and NavIC). By tracking multiple bands concurrently, the ZED-F9T-20B ensures extreme versatility and timing stability, even if it loses lock with one or more specific constellations.

![A ZED-F9T Qwiic GNSS Timing Breakout fully hooked up and ready for your next project!](https://www.sparkfun.com/media/.renditions/wysiwyg/Documentation/18774-SparkFun_GNSS_Timing_Breakout_-_ZED-F9T__Qwiic_-05.jpg)

The ZED-F9T-20B also features native support for [Galileo OSNMA](https://gssc.esa.int/navipedia/index.php/Galileo_Open_Service_Navigation_Message_Authentication) (Open Service Navigation Message Authentication), which protects against spoofing by verifying the authenticity of GNSS data.

#### Comprehensive Connectivity

SparkFun designed this breakout to be a complete GNSS development tool, borrowing the form factor of its popular GPS-RTK-SMA line to provide every connection needed:

- **SMA Connectors:** Includes three SMA connectors (one for the antenna and two dedicated to timing pulse signals), allowing for secure, low-loss connections to external equipment.
- **USB-C & Qwiic:** Features a modern USB-C connector for primary power and communication, plus two [Qwiic](https://core-electronics.com.au/catalogsearch/result/?q=Qwiic) connectors for easy, solder-free I2C integration with the rest of the system.
- **Full Access:** For advanced users, SparkFun has broken out a host of PTH pins, enabling direct access to most of the ZED-F9T-20B's pinout.
 
#### Fast Acquisition

To ensure the system is up and running quickly, the breakout includes an onboard rechargeable backup battery. This powers the module's internal Real Time Clock (RTC), drastically reducing the Time-To-First-Fix from a cold start (~24 seconds) to a hot start (~2 seconds).

### Features & Specifications

- Concurrent reception of GPS / QZSS, Galileo, BeiDou, NavIC constellations
- Receives L1/L2/L5, E1/E5, and B1/B2 bands 
    - L1C/A, L2C, L5
    - E1B/C, E5b, E5a
    - B1I, B1C, B2a, B2I
- Built-in security, including Galileo OSNMA
- Voltage: **5V** or **3.3V** (all logic is **3.3V**)
- Current: **68mA** - **130mA** (varies depending on operating conditions and constellations)
- Fix Acquisition: ~24s (Cold) / 2s (Hot)
- Time Pulse Signal Accuracy: 
    - Absolute Timing Mode: 5ns
    - Differential Timing Mode (with correction data): 2.5ns
- Time Pulse Signal Frequency: 0.25Hz to 25MHz
- Time Pulse Signal Jitter: ±4ns
- Horizontal Position Accuracy: 2.0m
- Max Altitude: 80km (49.7 miles)
- Max Velocity: 500m.s (118mph)
- I2C Address: **0x42**
- 2x Qwiic Connectors
 
### Documentation

- [Schematic](https://cdn.sparkfun.com/assets/6/c/2/5/b/SparkFun_GNSS_Timing-ZED-F9T_Schematic.pdf)
- [Eagle Files](https://cdn.sparkfun.com/assets/1/8/3/d/f/SparkFun_GNSS_Timing-ZED-F9T.zip)
- [Board Dimensions](https://cdn.sparkfun.com/assets/b/0/c/2/a/GNSS_Timing_Breakout-ZED-F9T_Dimensions.png)
- [Hookup Guide](https://learn.sparkfun.com/tutorials/gnss-timing-breakout---zed-f9t-qwiic-hookup-guide)
- ZED-F9T-20B Documents 
    - [Datasheet](https://cdn.sparkfun.com/assets/9/4/d/8/0/ZED-F9T-20B_DataSheet_UBXDOC-963802114-12681.pdf)
    - [Integration Manual](https://cdn.sparkfun.com/assets/b/6/4/c/5/ZED-F9T_IntegrationManual_UBX-21040375.pdf)
    - [Interface Description Reference](https://cdn.sparkfun.com/assets/d/3/e/4/6/u-blox-F9-TIM-2.25_InterfaceDescription_UBXDOC-963802114-13231.pdf)
- [u-center Software](https://www.u-blox.com/en/product/u-center)
- [Building a GNSS System](https://core-electronics.com.au/catalogsearch/result/?q=GNSS)
- [Qwiic Info Page](https://core-electronics.com.au/catalogsearch/result/?q=Qwiic)
- [Arduino Library - v3](https://github.com/sparkfun/SparkFun_u-blox_GNSS_v3)
- [GitHub Hardware Repo](https://github.com/sparkfun/SparkFun_GNSS_Timing-ZED-F9T)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/G/P/GPS-30975_ecommerce_1786944384033.jpg)