TDA 7294 pin layout

Alikabir1984 · ‎2025-12-18

Hi everyone,

I recently purchased these chips they look original as the seller only sells genuine parts, but when I check them with a DMM, the Tab and pin 15 should have continuity these dont, Pin 15 and 8 should have continuity these dont. Can anyone help identify if my method was correct as I was following the actual datasheet for these and they dont match.

Peter BENSCH · ‎2025-12-18

The photos look like original devices, at least. In fact, TAB is connected to pin 15, so you should be able to measure continuity between them with a DMM. Are you sure you are measuring at pin 15, i.e. the furthest right pin when looking at the label and TAB is at the top?

However, pin 8 is NOT connected internally to TAB or pin 15, which would also be counterproductive, because pin 8 does not have to be connected to the same negative supply as pin 15, as you can find in the data sheet, fig. 20.

Regards
/Peter

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