[sdiy] MCU Xtals

[Mike Bryant]

There used to be a range of low-cost sockets for SOIC and LQFP which were quite popular as they allowed programmed MCUs to be swapped.  But the Chinese manufacturer disappeared and since then I've never seen them again apart from the very expensive test sockets.  I suppose even these low-cost sockets often cost more than the IC in them so it wasn't that good a business.

-----Original Message-----
From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of Roman Sowa
Sent: 23 August 2022 08:48
To: Michael E Caloroso; SDIY
Subject: Re: [sdiy] MCU Xtals

The only quad packages in sockets I've seen are PLCC, and they are not exactly "leadless", so maybe it's something different.
Oh, and then there was 80186 in very unusual quad package, but its dedicated socked had nice and easy locking mechanism.

If it's PLCC put thin screwdrivers in the slots in diagonal corners and just lever it out. It really feels like the chip would break in half any moment when you do it, but eventually it goes out.

Maybe try to feed the crystal pins from external benchtop generator?

Roman

W dniu 2022-08-23 o 06:22, Michael E Caloroso via Synth-diy pisze:
> 
> Also the mcu is one of those quad leadless packages and I can't for 
> the life of me figure out how to pry the mcu out of its socket.  Need 
> to probe the pins in the socket to confirm power rails and signals.  
> At the moment I don't have the mcu info in front of me.
> 
> MC
> 
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