CD4027B: Can CD4027BE be used as a direct replacement for CD4027BCN?

With a 12 V supply, CD4000 devices have a drive strength of about 2 mA. With a 3 V supply, they have no guaranteed drive strength at all.

Use a device from a logic family optimized for lower voltages, e.g., SN74LVC112A or SN74HC109.

Hi Milad,

I think the issue you're seeing is related to having the slow input transition from your RC debounce circuit directly applied to the CMOS input of the CD4027B. Internal oscillations may be causing multiple triggers on a single button press. The issues that come from slow inputs can be inconsistent from one device to another, but we explain what can happen in this FAQ: How does a slow or floating input affect a CMOS device?

JK flip-flops aren't that common anymore. I would recommend to use a D-type flip flop like the SN74HCS74 for this circuit, but it doesn't operate with a 12V supply directly.

Do you have any lower voltage rails available in your system for logic? Considering that very little power is pulled by logic gates, an LDO linear regulator can be used to get a 5V rail to work with, and then this circuit can easily be implemented with the SN74HCS74:

Image from video: https://training.ti.com/jp/convert-momentary-switch-toggle-switch?context=1134826-1139263-1140418-1136772 

The two Schmitt-trigger buffers are used to 'clean up' the slow signals, making the inputs to the DFF have fast and clean edges. The SN74HCS74 has the Schmitt triggers integrated into every input, so they are not required for that device (or any others within the HCS family of logic).