User's Guide

PRO-FLEX TRANSCEIVER MODULES

USER’S GUIDE

The information in this document is subject to change without notice.

Confirm the data is current by downloading the latest revision from www.lsr.com.

Change Description

Change Description Continuation and/or Change

Justification

Insert D1 in series between J1 pin 1 (anode) and D2/C18

node (cathode)

So the module doesn't burn

Connect D3 anode to J5 pin 1/Z2 pin 2/C24/U4 pin7/U4

pin 8 node

So the module doesn't burn

Connect D3 cathode to D1/D2/C18 node So the module doesn't burn

Connect U2 as described below:

Connect C5 between U2 pin 1 and GND net

Connect U3 pin 3 to GND net

Connect U2 pin 4 and U2 pin 8 to D1/D2/D3/C18 node

Connect R6 between U2 pin 5 and U2 pin 6

Connect C4 in parallel with R6

Connect R5 between U2 pin 6/R6/C4 node and GND net

Higher input Voltage and safety features with new

regulator circuit

Connect C6 between U2 pin 5/R6/C4 node and GND net

Higher input Voltage and safety features with new

regulator circuit

Connect C7 between U2 pin 5/R6/C4/C6 node and GND

net

Higher input Voltage and safety features with new

regulator circuit

Connect J2 pin 1 to U2 pin 5/R6/C4/C6/C7 node. Label

node as VREG net

New voltage source selection scheme

Connect J2 pin 2 to VCC net New voltage source selection scheme

Connect Q1 as described below:

Connect Q1 pin 1 to GND net

Connect Q1 pin 2 to J2 pin 3. Label net as VBAT

Connect Q1 pin 3 to B1 pin 1

Reverse battery protection

Table 5 Rev. C Schematic Changes