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Add Texas Instruments TPL5010 - Nano Power Timer w/ Watchdog

Ed Peguillan III requested to merge github/fork/yankee14/TI_TPL5010 into master

This is an ultra low power timer from TI. It draws 35 nA while running. Timing interval set with a resistor, from 100 ms to 2 h. Can be triggered manually. It is designed to be used with a microcontroller e.g. to trigger an I/O ISR. It has a watchdog function for resetting the microcontroller if the microcontroller does not respond to the timer within 20 ms of the end of the current timing interval.

Datasheet: http://www.ti.com/lit/ds/symlink/tpl5010.pdf

Screenshot: tpl5010

Footprint: SOT-23-6* 1. https://github.com/KiCad/kicad-footprints/blob/master/Package_TO_SOT_SMD.pretty/SOT-23-6.kicad_mod 2. https://github.com/KiCad/kicad-footprints/blob/master/Package_TO_SOT_SMD.pretty/SOT-23-6_Handsoldering.kicad_mod

NOTE: The manufacturer's datasheet differs from the stock KiCad footprint. By the datasheet, the pad centerline distance between the two columns of pads should be 2.7 mm (no tolerance given), but it is only 2.2 mm in the stock KiCad footprint.

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