Hello. I am new to this website and I hope someone can help me. I am repairing my Quad 44 preamp. It uses SN16861 and SN16862 switching ICs in the input selection circuit. My version of the 44 has two SN16861 and one 16862. I have sourced some new SN16861 and replaced those. I cannot source a SN16862. I know that the main difference between the two ICs is that the SN16861 has 4 inputs and SN16861 has only 2. Quad used three SN16861 in later versions of the 44 but I cannot find out whether I can simply install an SN16861 in place of the SN16862, i.e. whether they are pin for pin compatible.
Any help would be greatly appreciated.
Any help would be greatly appreciated.
These types of circuits generally have two versions: a regular one and one that is prioritized when the power is applied. Thus, when they are cascaded, the first channel of the special type will always be selected when the power is applied
Hi NZBruin,
You can use a SN16861 in place of the SN16862
They are pin compatible but the SN16861 has two extra switches which will not be used.
Regards, Trevor
You can use a SN16861 in place of the SN16862
They are pin compatible but the SN16861 has two extra switches which will not be used.
Regards, Trevor