What is this three-legged component?

Status
Not open for further replies.
It is a ceramic resonator, one with the loading capacitors built in - the centre pin is the ground for the capacitors.
 
Yes it's a ceramic resonator, seems a higher frequency than most though, I seem to recall they were usually 455KHz or so? - they commonly break off, due to the remotes been dropped. I suspect it's probably a remote that uses a micro-controller, rather than a custom remote IC.
 
The outer two are the direct connections to the resonator, then the centre one is (typically) ground, with an appropriate value load capacitor to each outer terminal.

The commonest crystal oscillator configuration on microprocessors, or using CMOS gate etc., uses a crystal with a capacitor to ground from either end.

Those ceramic resonators are a low cost equivalent to a quartz crystal, with lower frequency accuracy. The three terminal ones also combine the capacitors to reduce the component count.

eg






A three terminal resonator replaces the separate crystal and load caps.
 
That explains why it fell off so easily and without desoldering.
 
Status
Not open for further replies.

Similar threads

A
  • Question
What is this component
Replies
6
Views
942
Papabravo
M
  • Solved
Three legged component
2
Replies
27
Views
5K
MartinTT
M
B
  • Question
What is this component? 6.00 Cm b
Replies
3
Views
2K
Nigel Goodwin
D
What is this compound on Orbitsound circuit board.
Replies
9
Views
1K
Diver300
D
What is this HDMI gadget name ?
Replies
1
Views
786
ZipZapOuch
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…