UPC1237 Datasheet, UPC1237 Amplifier Protection IC Datasheet, buy UPC1237HA IC.
Oct 20, 2017 · Hi reedcat, No, I think the chip is fine. You have to tie the unused inputs down to common, pin 4 should see just under a volt on it (AC power ...
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The time delay from amplifier power ON to relay ON can be freely set by selecting external components. (For AC- power-ON mute through pin 7).