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| nr | name | cat | description | manufacturer | 
|---|---|---|---|---|
| 227 | OP227 | amp | Dual*, Low-Noise, Low-Offset, data | AD | 
| 2271 | ? | Speech Stik, | Dallas* | |
| 2275 | SSM2275 | amp | Dual*, Rail-Rail Output Audio Amplifier, data | AD | 
| www.chipdocs.com/ | Very good! | 
| www.icmaster.com/ | Registration is needed in advance. Will be closed spring 2002. | 
| www.questlink.com/ | Registration is needed before you can download datasheets. Chips can sometimes be ordered via Arrow/Avnet. | 
| www.elisnet.or.jp/ | In Japanese only. | 
| www.findchips.com/ | Do a search at 20+ distributors at once! | 
| www.netcomponents.com/ | Do a search for scarce chips at many brokers at once! | 
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