[sdiy] One more part gone (SSM2210/SSM2220)

[Paul Schreiber]

> Looking around the Analog Devices site, the pricing and availability  for 
> the SSM2210 has disappeared altogether. The SSM2220 looks like  they're 
> getting rid of the non-ROHS version, but the PZ lead-free  version is 
> still listed as "production". However, neither part  appears on the 
> Matched Transistors page. There's no comment there  about the recent (?) 
> disappearance of the SSM parts or the MAT02  being obsoleted.
>

After poking around a bit:

a) ADI sent out obsolete notices to major OEMs and distributors on Sept. 
23rd
b) SSM2210P and PZ are toast. No pin-for-pin substitutes unless Linear 
Systems has something.
c) MAT-02EH/EHZ is toast. The LM394H is closest part, but *that* is toast

For *new* designs:
- Use something from Linear Systems or THAT Corp in SMT

For *existing* designs:
- hope you have enough in the closet (I have 100s left)

Paul S.