I am in the process of designing a breakout-board style PCB for a project that uses the ORG1411-PM01 module (datasheet here:https://www.origingps.com/wp-content/uploads/2016/11/Nano-Hornet-ORG1411-Datasheet.pdf) and I am trying to figure out if a suggested component is required.
In the Typical Application Circuit (Figure 9, pg 26) a 3 Terminal RC Filter Array is placed on the comms lines between the GPS module and the host MCU. It is a Murata module NFA31GD1004704.
Main question - What is this unit (the RC filter) really meant to do? Is it really necessary?
I have come across other example schematics where it is not included - for example Mikro Nano GPS click (I will have to attach the link in comments as I do not yet have sufficient reputation).
Any advice greatly appreciated!