I need a 16 MHz crystal oscillator, square wave output. square and sine wave types exist, sellers don't mention which type their product is. How can I be sure I am buying square wave?

 

I need a 16 MHz crystal oscillator, square wave output. square and sine wave types exist, sellers don't mention which type their product is. How can I be sure I am buying square wave?

Datasheet, datasheet, datasheet

 

Decide the stability you want and start with a Google of 16 MHz TCXO and most will call out a TTL output or CMOS output in the data sheet. You are more likely to find a 32 MHz so just /2. They are a common part. Also decide the package you want?

Ron

 

Datasheet, datasheet, datasheet

No datasheets offered on the sites I have been on. and no specifications. Wrong sites? Where would you go for this?

 

Crystal oscillator modules generally generate square wave output.

They will look similar to this:



https://www.futurlec.com/Crystals/OSC16000pr.shtml

 

No datasheets offered on the sites I have been on. and no specifications. Wrong sites? Where would you go for this?

You go to a reputable company that provides relevant design information.
https://lokoselectronics.com/wp-content/uploads/2018/11/AE431.pdf
https://foxonline.com/wp-content/uploads/pdfs/O8HS.pdf
https://www.nxp.com/docs/en/application-note/AN2500.pdf

How come you are dealing with companies that don't provide datasheets? Are you suffering from some impediment or do you have some other limitation?
NOBODY designs anything without access to datasheets. Period. Full Stop.

 

I sometimes source components from surplus suppliers who never provide the datasheet, but it's nearly always available from the manufacturer. Just keep in mind that if your buying surplus or from non-reputable suppliers your parts may not match their specs exactly. Components are usually rated to a certain specification with a designated % of tolerance. Surplus is sometimes components that measured closer to the extremes of that tolerance and wasn't suitable for production use.

 

I sometimes source components from surplus suppliers who never provide the datasheet, but it's nearly always available from the manufacturer. Just keep in mind that if your buying surplus or from non-reputable suppliers your parts may not match their specs exactly. Components are usually rated to a certain specification with a designated % of tolerance. Surplus is sometimes components that measured closer to the extremes of that tolerance and wasn't suitable for production use.

Presumably if you are dealing with surplus parts it is because you have the time and the equipment to sort the parts into two piles. One pile you intend to use for some useful purpose and the other pile you intend to bin. To buy surplus parts under any other conditions is to consider the seller a charity that you don't mind throwing money at for literally NOTHING in return.

 

Crystal oscillator modules generally generate square wave output.

They will look similar to this:

View attachment 218576

https://www.futurlec.com/Crystals/OSC16000pr.shtml

Thanks, that was helpful.

 

Just make it yourself out of a crystal, 10M resistor, two 15pF capacitors and a 74HCU04. Then you'll know it's a square wave

 

Hello,

What size do you expect?
There are several packeges available:


The one @MrChips showed is the 014 package.

Bertus

 

The simplest is 5V or 3.3V can 16 MHz, the output is usually a square wave. Adding a filter and buffer will give a sine.
A little more work but satisfying is to make an oscillator with a crystal and a few parts.
A transistors with a higher gain work good. A dual op amp for 16 MHz sine will give an excellent result.
It's your choice. Depending on your choice the design for both sine and square can have slight difference.