Tagged Questions
1
vote
2answers
135 views
Ground copper pour for Crystals and Real time clocks
I am laying out a (2-layer) board, with a standard SMD Crystal as well as a Real-time clock placed on the top-side of the board.
What are guidelines regarding ground copper pour under the Crystal and ...
2
votes
2answers
295 views
Is case grounding compulsory in typical 32.768kHz crystal for Real Time Clock?
Pictures shown below is a typical 32.768kHz crystal, commonly use in Real Time Clock circuit (e.g: DS1307 & DS1337)
Referring to an earlier question posted here, it is a good practice that ...
6
votes
1answer
362 views
How is my crystal layout looking?
I've done a preliminary layout of my crystals. I've never designed a board with crystals so this is just a rough first pass based on my small set of working knowledge of crystal layout. How am I ...
12
votes
1answer
2k views
Competing PCB Crystal layout recommendations
This is related to this question: How's my crystal oscillator layout?
I'm trying to layout a 12MHz crystal for a micro controller. I've been reading through several recommendations specifically for ...
7
votes
2answers
459 views
How far is “too far” when routing traces for crystals, and how asymmetrical is “too much”?
I'm routing a breakout board for NXP's LPC23xx microcontroller. This MCU requires two crystals if one is using the RTC. These two crystals connect to the MCU with only 3 pins in between:
From this ...
4
votes
6answers
394 views
What is the optimum distance between a micro-controller and a crystal on a PCB?
I wanted know what should be the optimum distance between a microntroller(AT89C51ED2) and a crystal of frequency 11.0592MHz?
