Holtek Micro Controllers

[jerryk]

I have a Holtek HT50F80 that I'm trying to find a replacement for.  I think it's an OEM part as I cannot find it anywhere.  My guess is it's an off the shelf MC from Holtek that has been custom marked but am not sure which it might be.  I have studied the circuit and have some possible candidates for replacement but was wondering if there is some way to cross reference the OEM number.  Also I'm looking at the Holtek ecosystem and wondering if anyone has experience programing Holtek MCs that they might share.

Jerry

[slugrustle]

There's nothing on Holtek's english language site, not even in EOL notices.

I did a little searching on baidu and came up with two references to an HT50F61, which is the closest thing I could find.

https://b2b.baidu.com/land?id=bc9ff009f50959fe5cbfc6deb4e68d5510 has the title "HT50F61(HT66F004) SOP20 HOLTEK".

http://www.icdemi.cn/HT50F61_SOP20_106812.html has some text description of an HT50F61, but no datasheet.

You could try reaching out to Holtek's customer support.  They do have a dedicated website for the U.S.; here's the contact page: https://holtekusa.com/contact.php

https://jaycarlson.net/pf/holtek-ht-66/ has a nice writeup of programming an HT66F0185.  It's part of the "Amazing $1 Microcontroller" series.

[bidrohini]

I think you can submit your query here too: https://www.holtek.com/question