I'm working on a project that will use a PIC16LF870SS running off a
lithium ion battery between
3 and 4 volts. Due to cost and space constraints, I want to use a surface
mount resonator
with built-in capacitors. The PIC will run at 4 MHz. In a previous
project, I've had trouble with
SMT resonators, but pretty much any through-hole 4 MHz resonator with
caps seems to work.
On the previous project (using a PIC16F628 running on 5V at 4 MHz), I
found that a Digikey
PX400SCT-ND (Panasonic EFO-S4004E5) was unreliable in the circuit. I had
muRata
characterize a resonator for that circuit, and they came up with a part
number
CSTCC4M00G53093-R0, which appears to be a custom part number.

Of course the Microchip datasheet lists only a few resonators without
built in capacitors. It
seems that Microchip should have a list of resonators with built-in
capacitors (both through
hole and smt) that will work with their chips. Any such a list exist?

Can anyone else suggest a STANDARD SMT resonator with caps that is likely
to work with the
PIC16LF870SS at 4MHz and 3V?

I've spent too much time chasing resonator/PIC compatibility. With two
wires and ground,
there's not a whole lot I can do to make it work. Others must have solved
this problem!

Thanks!

Harold Hallikainen
Dove Systems


FCC Rules Online at http://hallikainen.com/FccRules
Lighting control for theatre and television at http://www.dovesystems.com

Reach broadcasters, engineers, manufacturers, compliance labs, and
attorneys.
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