What the heck is with RS components?

[throbscottle]

I stumbled upon a very handy little dual transistor, the BCV63, which makes a nifty little schmitt trigger. So I thought I'd get some from RS because of free postage. Imagine my surprise, they don't stock it, and there doesn't seem to be an equivalent.
So anyway, not worth paying the postage to get it from elsewhere just to save a bit of board space. Grumble mutter mumble...

 

[MacIntoshCZ]

brexit

 

[Ian Rogers]

They have loads of bcv61... same current..

 

[throbscottle]

BCV61 is a current mirror. Which would be great if that's what I wanted. The BCV63 and 64 are connected as Q1E+Q2E, Q1B, Q2C and Q1C+Q2B. NXP list it as a schmitt trigger, LTSpice shows you don't need a resistor between the 2 transistors anyway, so I thought why not.
I found it when looking for dual transistors for another schmitt trigger variant...

Brexit, indeed...

 

[rjenkinsgb]

Not exactly the same device, but can do the same thing; and they are quite cheap and in stock:

https://docs.rs-online.com/3f24/0900766b81366e86.pdf

 

[Visitor]

Not exactly the same device, but can do the same thing; and they are quite cheap and in stock:

https://docs.rs-online.com/3f24/0900766b81366e86.pdf

I just watched a Big Clive video video where he took apart a motorbike tail light that had a circuit like this for driving an LED and a while back I was scratching out a similar circuit for....I can't remember. Nice component to know about.

 

[Ian Rogers]

BCV61 is a current mirror. Which would be great if that's what I wanted. The BCV63 and 64 are connected as Q1E+Q2E, Q1B, Q2C and Q1C+Q2B. NXP list it as a schmitt trigger, LTSpice shows you don't need a resistor between the 2 transistors anyway, so I thought why not.
I found it when looking for dual transistors for another schmitt trigger variant...

Brexit, indeed...

Sorry mate... Analogue isn't my fortè

 

[throbscottle]

Nice, but the minimum I could get is 100 - makes it not so cheap.
No matter, have lots of old transistors I can just use 2

 

[schmitt trigger]

These are the sort of circuits which work really well with a monolithic transistor pair.