Are the TF30 compact GPS receiver input lines 5 volt tolerant?
No, providing 5V to the TF30 GPS input pins may damage the unit, so correct level conversions must be performed between 5V and 3.3V. There are few choices for changing the level such as using a resistor divider, a transistor network with 3.3V as the collector voltage, or using a buffer IC to change the level of the TTL signals.
