Hello,
Back in the 1990's I used to use LM or SE/NE 565, 566 & 567 PLL chips for various things (VCO's, tone decoders, waveform generators, etc.). I recently got back into tinkering with chips and noticed these chips are no longer available. I realize most of the functions these chips provide is now done digitally, but I was wondering if there were similar analog PLL chips currently available (yes, I know the 56x series are still available on eBay). Does anyone know of such an animal? Thanx!

 

You might look into the 74HC4046, available from ON Semi, Texas Instruments and others.

 

Hello,

There are many PLL chips:
http://www.newark.com/w/c/semicondu...ent/phase-locked-loops-pll/prl/results?st=pll
There are some suc catagories given on the left.

The 567 is still available:
http://www.newark.com/search?st=ne567

Bertus

 

You might look into the 74HC4046, available from ON Semi, Texas Instruments and others.

Thanx. I have downloaded the datasheet and will look it over. Am I rushing to judgement assuming this is a CMOS (logic) device?

 

Hello,

There are many PLL chips:
http://www.newark.com/w/c/semicondu...ent/phase-locked-loops-pll/prl/results?st=pll
There are some suc catagories given on the left.

The 567 is still available:
http://www.newark.com/search?st=ne567

Bertus

Thanx, I guess I missed the 567 and Newark (I searched Jameco, ALL Electronics & Mouser for the 564 thru 567, ad only found the 564). I appreciate the help!

 

Am I rushing to judgement assuming this is a CMOS (logic) device?

Nope. "74HC" devices are CMOS. The "HC" stands for "High-speed CMOS." Note that unlike 4000-series devices, 74HCxxxx devices are intended to operate from supply voltages of 3-6 volts, nominally 5V.

 

Nope. "74HC" devices are CMOS. The "HC" stands for "High-speed CMOS." Note that unlike 4000-series devices, 74HCxxxx devices are intended to operate from supply voltages of 3-6 volts, nominally 5V.

I'm not trying to start an argument, but I'm confused. You say "nope" to my assumption that the device is CMOS, but then tell me "74HC" devices ARE CMSO (which is why I made the erroneous assumption to begin with. I'm soooooo confused

 

I'm not trying to start an argument, but I'm confused. You say "nope" to my assumption that the device is CMOS, but then tell me "74HC" devices ARE CMSO (which is why I made the erroneous assumption to begin with. I'm soooooo confused

I said "nope", you're not rushing to judgement in assuming it's a CMOS device. In other words, you were right in assuming it is.

 

The original CD4046 is still in production and allows wider power supplies but significantly lower maximum frequency.

The 4046 has two phase comparators built in. Most PLLs don't. One of the comparators allows much wider capture range than the typical PLL phase comparator.

http://www.ti.com/lit/pdf/scha002
is written for the 4046 but also applies to HC version in terms of function but not electrical characteristics.

I believe that there are some PLL "controllers" around that do not incorporate the VCO on-chip but support an external VCO. These can be useful where the VCO is a voltage-compensated crystal oscillator for doing things like making an ultra-precision clock using a signal from a GPS receiver to tweak the VCXO.

 

Just for the sake of completeness, there is one version of the venerable '4046 that has a third phase comparator. It is the Motorola MC74HC4046A. Besides the EX-OR phase comparator I and the edge sensitive digital phase comparator II there is an RS-Flip-Flop phase comparator III whose output is on pin 15, which is used for the cathode of the 5.1V Zener in other versions.

 

I said "nope", you're not rushing to judgement in assuming it's a CMOS device. In other words, you were right in assuming it is.

Ahhhh. Not confused anymore... for the moment

 

The original CD4046 is still in production and allows wider power supplies but significantly lower maximum frequency.

The 4046 has two phase comparators built in. Most PLLs don't. One of the comparators allows much wider capture range than the typical PLL phase comparator.

http://www.ti.com/lit/pdf/scha002
is written for the 4046 but also applies to HC version in terms of function but not electrical characteristics.

I believe that there are some PLL "controllers" around that do not incorporate the VCO on-chip but support an external VCO. These can be useful where the VCO is a voltage-compensated crystal oscillator for doing things like making an ultra-precision clock using a signal from a GPS receiver to tweak the VCXO.

The current CD4046 devices have a third phase detector, I don't know when the change happened. So they are similar but not identical to our friends from 20 years ago. But still availabel today, which tells us that it is a very useful part.

 

"The current CD4046 devices have a third phase detector,..."

From what manufacturer? I haven't seen it on any datasheets I've looked at - ON, Nexperia, TI (which is a scan of the original RCA sheet, from the looks of it). The 4046 has been around since the 1970s.

 

"The current CD4046 devices have a third phase detector,..."

From what manufacturer? I haven't seen it on any datasheets I've looked at - ON, Nexperia, TI (which is a scan of the original RCA sheet, from the looks of it). The 4046 has been around since the 1970s.

Motorola MC74HC4046A