1044scpa vs 7662CP vs 7660

[Locrian99]

Are these interchangable?

Also anyone have bad experience with the tayda 1044scpa ?

Thanks

 

[finebyfine]

I've never had an issue with the Tayda 1044. The 1044 was made as a pin compatible upgrade to the 7660 so to a certain degree they are interchangeable, but the 7660's oscillator frequency is by default in the audible frequency range and can't be increased out of it the way a 1044s can. I've never subbed one so can't speak to oscillator feed through personally.

 

[Silver Blues]

The 7660S has the onboard frequency booster necessary to get the oscillator out of audio range.

 

[Cybercow]

The 1044scpa, 7662CP & 7660 are all pin-for-pin compatible. However, their respective max voltage supplies, operating frequencies, max current outputs and max voltage outputs vary from one to the other. See the datasheets for details.

 

[Locrian99]

The 1044scpa, 7662CP & 7660 are all pin-for-pin compatible. However, their respective max voltage supplies, operating frequencies, max current outputs and max voltage outputs vary from one to the other. See the datasheets for details.

Ok so the reason for my question was I have a 7662 that would be used in like the Aphrodite circuit on hand. Got a Doxie to build in the schematic they look pretty similar however between pins 2 and 4 of the 7662 the Aphrodite is using a 100u where as with the 1044 the Dixie is using a 10u. Also coming off of pin 5 it’s 100u vs 10u. Also the 100n is swapped position but I suspect that doesn’t matter much.

 

[Cybercow]

Those electrolytic caps are just for smoothing any "ripple". I suggest following the values in either the build doc or as printed on the PCB. IMO, a 47µF cap could be used in both scenarios.

 

[Bricksnbeatles]

Speaking of 7660SCPAZ, does anyone have experience with them from amazon? Legit, or nah? I know Amazon doesn’t have the greatest track record with having legit chips, but I’m wondering if they’re worth grabbing in a jam
Bridgold 10pcs ICL7660 ICL7660SCPAZ 7660S 7660SCPAZ CMOS Voltage Converters IC,DIP-8. https://a.co/d/2kg5zCl

 

[Locrian99]

Speaking of 7660SCPAZ, does anyone have experience with them from amazon? Legit, or nah? I know Amazon doesn’t have the greatest track record with having legit chips, but I’m wondering if they’re worth grabbing in a jam
Bridgold 10pcs ICL7660 ICL7660SCPAZ 7660S 7660SCPAZ CMOS Voltage Converters IC,DIP-8. https://a.co/d/2kg5zCl

I don’t, I’d be curious though. I think I’ve been lucky and haven’t had any real issues from Amazon. I bought 10 lm13700 from that same seller and 2 of the ten didn’t work in the circulator pcb.

 

[Amplified Parts]

Hard to say because it's a third party seller there. The stock comes from Bridgold Direct, so it depends on what they are carrying.

The printing looks very suspect to me. I think this is a genuine Intersil ICL7660S:

https://www.radio741.com/120825-large_default/icl7660scpaz-icl7660s-intersil-integrated-circuit-cmos-voltage-converter.jpg

 

[Locrian99]

Speaking of 7660SCPAZ, does anyone have experience with them from amazon? Legit, or nah? I know Amazon doesn’t have the greatest track record with having legit chips, but I’m wondering if they’re worth grabbing in a jam
Bridgold 10pcs ICL7660 ICL7660SCPAZ 7660S 7660SCPAZ CMOS Voltage Converters IC,DIP-8. https://a.co/d/2kg5zCl

Free returns…

I’ll let you know Thursday.

 

[Locrian99]

Speaking of 7660SCPAZ, does anyone have experience with them from amazon? Legit, or nah? I know Amazon doesn’t have the greatest track record with having legit chips, but I’m wondering if they’re worth grabbing in a jam
Bridgold 10pcs ICL7660 ICL7660SCPAZ 7660S 7660SCPAZ CMOS Voltage Converters IC,DIP-8. https://a.co/d/2kg5zCl

Yea do not buy them. These are heading back. 100% not scpa. Has that high frequency whine, darn I was hoping.

 

[Locrian99]

Hard to say because it's a third party seller there. The stock comes from Bridgold Direct, so it depends on what they are carrying.

The printing looks very suspect to me. I think this is a genuine Intersil ICL7660S:

https://www.radio741.com/120825-large_default/icl7660scpaz-icl7660s-intersil-integrated-circuit-cmos-voltage-converter.jpg

You are right they are relabeled.

 

[Robert]

Coincidentally I was just looking at the TC7662, that's why this thread caught my eye.

The 7662 runs at 12kHz, no boost function, so that's a bummer.... But, it can handle up to 18V input, so that's different.

 

[swyse]

Coincidentally I was just looking at the TC7662, that's why this thread caught my eye.

The 7662 runs at 12kHz, no boost function, so that's a bummer.... But, it can handle up to 18V input, so that's different.

7662B can take 15v and has the boost frequency, ive used those on klones before.

 

[Silver Blues]

7662B can take 15v and has the boost frequency, ive used those on klones before.

This is also what VFE calls for in their power delivery boards.

 

[BrooksBlackhawk]

I ordered some TC7662B and will report back with my findings.

https://www.mouser.com/datasheet/3/282/1/21469a.pdf

 

[jwin615]

I ordered some TC7662B and will report back with my findings.

https://www.mouser.com/datasheet/3/282/1/21469a.pdf

Why?

 

[jessenator]

I ordered some TC7662B and will report back with my findings.

While I hope it works out for you, what we sacrifice for maximum voltage is oscillator frequency. Personally, I find the latter more appealing.

From the TC7662 datasheet:

The on-board oscillator operates at a nominal frequency of 10kHz. Frequency is increased to 35kHz when pin 1 is connected to V+ , allowing the use of smaller external capacitors.

I mean, if VFE circuits aren't having squeal/heterodyne problems, that's something, but butter safe. I've just defaulted personally to the TC7660H, which has a frequency of 120kHz, but a max input voltage of 10V. Lower than the TC7660SCPA's 12V, but no pin bridging required, and nearly 3x the max frequency.

 

[jwin615]

LTC3863
Higher current output and high voltage input and up to 350kHz
If you want to max spec it...

 

[pettert]

While I hope it works out for you, what we sacrifice for maximum voltage is oscillator frequency. Personally, I find the latter more appealing.

From the TC7662 datasheet:


I mean, if VFE circuits aren't having squeal/heterodyne problems, that's something, but butter safe. I've just defaulted personally to the TC7660H, which has a frequency of 120kHz, but a max input voltage of 10V. Lower than the TC7660SCPA's 12V, but no pin bridging required, and nearly 3x the max frequency.

Ah, I've been meaning to ask the board about TC7660H, no downsides beside the max input voltage?