Alternative Oscillators to TG2520SMN

LMS

In the P2 Edge Schematic the Oscillator is a TG2520SMN

It is tiny and hard to hand solder,.

Is it ok to use a typical 20Mhz Xtal with a couple of caps, if so what value the caps should be.

Or a recommendation for an alternative easier to solder package.

Wuerfel_21

Yea, normal crystal is fine. Older boards use one. However, high-speed digital signals on the 28..31 pin group can disturb the oscillator circuit. There's more detailed info buried here in the forum about this.

Rayman

Believe that oscillator issue was unique to the Eval board. Had a questionable layout around the crystal…

Btw you don’t need caps at xtal with p1 or p2

LMS

Thank you for the replies.

evanh

I recently hand soldered my first surface mount board, and I mean each component one at a time. The oscillator module did pose a small learning challenge but the biggest takeaway I've learnt is, when not using solder paste, always pre-tin every pad on the board and every contact on the components. Then when soldering the component to the board there is no chance of a dry joint.

When it came to the oscillator, the four rigid underside contacts meant it wasn't possible to directly apply heat to the joins. Instead the metal top of the package was suitable. I just blobbed it so that all four joints melted at once. With a little poking from a screwdriver I could move the package into place while the iron was keeping it hot. The only obvious down side is the top of the oscillator is now coated in solder.

Rayman

One way is to solder the pads then put no clean flux on top and use heat gun.
Works very well.