Just would like some comments from people who have used Fairchild's Tinylogic digital gates

[Mr. J D]

I have designed my digital circuit by using TinyLogic devices,
throttling them at 5V. I am using them because of there LOW and HIGH
voltage specs, because there inputs are from a PIC. Just wondering if
these units performed as you expected.

 

[Mr. J D]

FYI, I chose the TinyLogic because I wanted a low part count. If I went
for a normal, 5V HIGH, I would have needed a buffer, right?

 

[Eeyore]

FYI, I chose the TinyLogic because I wanted a low part count. If I went
for a normal, 5V HIGH, I would have needed a buffer, right?

Tinylogic gates are just the same as 'normal' ones but available as single
gates. You appear to have some misunderstanding. What's all this about low and
high levels ?

Graham

 

[Winfield Hill]

Mr. J D wrote...

I have designed my digital circuit by using TinyLogic devices,
throttling them at 5V. I am using them because of there LOW and HIGH
voltage specs, because there inputs are from a PIC. Just wondering if
these units performed as you expected.

My comment is, they are really small. Don't sneeze!

 

[Rich Grise]

FYI, I chose the TinyLogic because I wanted a low part count. If I went
for a normal, 5V HIGH, I would have needed a buffer, right?

You need to learn to read a data sheet.

As long as Voh is higher than Vih of the driven device at Iih, it will
drive the chip. That's "Output high voltage", "Input high voltage" and
"Input high current".

Good Luck!
Rich

 

[Mr. J D]

You need to learn to read a data sheet.

As long as Voh is higher than Vih of the driven device at Iih, it will
drive the chip. That's "Output high voltage", "Input high voltage" and
"Input high current".

Good Luck!
Rich

Could you explain this better, I dont have the datasheets on hand. But
when I did read them, I interpreted them as having a HIGH signal as
low as 2.2 volts. Othe Digital devices need more than 3 volts.

 

[Mr. J D]

Tinylogic gates are just the same as 'normal' ones but available as single
gates. You appear to have some misunderstanding. What's all this about low and
high levels ?

Graham

When I read the brochure it said it sensed HIGH input signals as low as
2.2 Volts. They come in Quad DIP packs also. Are you talking about a
different chip?

 

[John Larkin]

When I read the brochure it said it sensed HIGH input signals as low as
2.2 Volts. They come in Quad DIP packs also. Are you talking about a
different chip?

TinyLogic is all surface-mount, one to three gates per device, never
DIPs. DIP packages aren't tiny!

John

 

[Mr. J D]

TinyLogic is all surface-mount, one to three gates per device, never
DIPs. DIP packages aren't tiny!

John

I am going to have to refute you on that LOL. Yes TinyLogic are one to
three gates per device in packs such SOT and other surface mount, but I
know for a fact that they offer them in Quad DIP packages also. The
TinyLogics are different from most, not just because they offer single
gate packs, but because they require MUCH less power than other
ordinary CMOS logic familys. I am talking about Fairchild's TinyLogic
product family here.

 

[John Larkin]

I am going to have to refute you on that LOL. Yes TinyLogic are one to
three gates per device in packs such SOT and other surface mount, but I
know for a fact that they offer them in Quad DIP packages also.

Got a link to a DIP-packaged TinyLogic part?

The
TinyLogics are different from most, not just because they offer single
gate packs, but because they require MUCH less power than other
ordinary CMOS logic familys. I am talking about Fairchild's TinyLogic
product family here.

Much less power? Most CMOS parts pull nanowatts static power already.

John