I usually see crystals with 2-pins. Can anybody tell me what are the other legs for in 4-pin crystal oscillator packages? Thanks in advance.
-- Hoi
- posted
17 years ago
4-pin Crystal
Loading thread data ...
- Vote on answer
- posted
17 years ago
These are oscillators, ie crystals + the required circuitry to make them oscillate. The pins are vcc, gnd, clock out and the last is not connected.
They orivide a good accuracy and can be used as a clock line for several chips.
vic
- Vote on answer
- posted
17 years ago
A crystal oscillator has power/gnd/out and possibly adjust or a no-connect. There are 4-connector surface mount crystals. Two opposite corners are the crystal and the other two seem to connect to the case (so you could ground it).
-- Ben Jackson AD7GD http://www.ben.com/
- Vote on answer
- posted
17 years ago
Three of them are: VCC, GND and OUTPUT.
Sometimes they have an ENABLE.
- Vote on answer
- posted
17 years ago
Thanks a lot folks! I couldn't find the datasheet for the 4-pin oscillators I have. Is there a general way to test which pin is which? I knew only one of them is connected to the case, and I don't want to blow it up by putting the power pin in the wrongest place.
other
no-connect.
- Vote on answer
- posted
17 years ago
Should be on Mouser.com
...
- Vote on answer
- posted
17 years ago
Most of these oscillators would fit in a 14 pin IC socket. Pin 1 is marked (sharp corner while others are rounded) and may be a control or enable input. Pin 7 is ground, 8 is output, and 14 is +5 volts.
Have a look at Digikey for oscillators - the package and pinout is common to most manufacturers.
-- Peter Bennett VE7CEI email: peterbb4 (at) interchange.ubc.ca GPS and NMEA info and programs: http://vancouver-webpages.com/peter/index.html Newsgroup new user info: http://vancouver-webpages.com/nnq
- Vote on answer
- posted
17 years ago
cool..... thank you all :)
oscillators
one
putting
formatting link