I‘m searching for weeks now and haven’t found a answer.

Goal:

Identification of this IC:

JFN8-1 GA167003



What it does:

If you press the button, it generates a „buzzing“ sound to the 8 ohm 0,25w speaker for 2 seconds. (Not longer even if you hold the button longer)

It is driven by 2x 1,5V batteries in series = 3 V

If the button is pressed, 4 LEDs are turning on for 2 seconds as well.

More informations:

I‘m stunned that this one chip acts as a MCU, DAC and AMP all in one. I thought it is maybe a low powered (3V) 555 chip and the buzzing sound is generated through electricity like in this video:https://youtube.com/shorts/ip5h3PaBz_4

But it wouldn’t stop after 2 seconds if I’m right. So that could only be part of the answer.

I know I could recreate this circuit with a MCU like RP2040 & AMP & DAC like the Max98357, but that would be a couple of times more expensive. And a normal „piezo buzzer“ doesnt have enough quality.

That’s why I would like to know what this „magical“ IC is and how somebody can recreate a cheap circuit like that. (Buzzer sound with real 0,25w speaker & LEDs)

Thank you in advance for your time!

 

Why does this surprise you? All kinds of people make chips for which there is no know public information and never will be. They don't intend for people to repair the products they go into, or they don't intend to enable them to make competitive products. The markings are likely in-house markings which will lead you nowhere when doing an internet search. It is barely possible that somebody somewhere will discover an obscure fabrication house that actual does have something you can use, but they are the exception rather than the rule.

IMHO - you are well and truly hosed.

 

Welcome to AAC.

Pretty amazing, isn’t it?

That’s just a typical ASIC. It’s really not so magical. Except for the speaker driver, everything that chip does can be done by something like an ATTiny that is programmable and costs less than a dollar in quantity.

You are very unlikely to find the source of that IC. It is one of thousands that is made for special applications and sold only to OEMs for making millions of disposable items. If you want something that does those things, the closest you are likely to come is a small MCU + a small amp.