Product data sheet. 1 General description. The 74HC; 74HCT decodes three binary weighted address inputs. (A0, A1 and A2) to eight. HC datasheet, HC pdf, HC data sheet, datasheet, data sheet, pdf, QT Optoelectronics, HIGH SPEED TRANSISTOR OPTOCOUPLERS. HC 1-of-8 Decoder/demultiplexer. The SL74HC is identical in pinout to the LS/ALS The device inputs are compatible with standard CMOS outputs;.

Author: Gaktilar Vorg
Country: Kenya
Language: English (Spanish)
Genre: Health and Food
Published (Last): 18 January 2017
Pages: 141
PDF File Size: 14.39 Mb
ePub File Size: 6.65 Mb
ISBN: 365-4-18913-604-8
Downloads: 97414
Price: Free* [*Free Regsitration Required]
Uploader: Yozshukazahn

Until I crack this, I’m stymied. I take your point about the but there is one bit of dwtasheet evidence: This is really proving problematic.

SLS HC Series Datasheets. SL74HC, HC Datasheet.

The tcsl on the datasheet is 50ns so does that mean any glitch shorter than 50ns won’t have any effect? Debug breakpoints automatically disabled 16F88 cannot set internal oscillator frequency beyond So try transitioning between Yn and Ym where n and m dattasheet have one address bit different. I cannot see anywhere where I have broken any rules. Datawheet this a clue?

The waveforms are perfect. Please bear in mind that I have been tinkering with the code for several days and have tried many variations. If not, I set CS high and do other stuff until the next time, assuming that polling CS either does nothing if in the middle of a conversion or initiates a new conversion.


I’m going wrong somewhere but there has to be a limit to how many times I can read the datasheet before mental atrophy sets in! The transitions from Y0 being active to Yn being active so any glitches ought to appear on the other outputs.

I then read SDO to see if a conversion is ready. Essentials Only Full Version. This is the scenario: Any help gratefully received. However, I notice in trawling for datashee code, that an example from Microchip dafasheet a 1ms low-going pulse to the CS.

Sometimes a conversation with someone knowledgeable just frees up the brain a bit! That should be bc138 free and will do for testing.

Therefore, it needs to be. Could a tiny bit of ringing on the line upset the device?

MCP – Odd results? | Microchip

It’s bound to be some devilish little detail confounding me. Thanks again for your help! M Super Member Total Posts: Also, I see in one app note schematic, a 1K resistor in each digital line. It does seem to require a 1ms start pulse.

  9508 AVAYA PDF

Hey – that’s an interesting thought. Forum Themes Elegant Mobile.

MCP3551 – Odd results?

CS is driven through a HC decoder. Meanwhile, thanks for your suggestion. Microchip are usually pretty thorough. And so seems to be the case. If it is, I clock the result out. Changing the address pins with the enables strapped active is likely to cause glitches. This is a best guess: User Control Panel Log out. But I’ve read it and read it and I cannot see anything that would tell me.

HC138 Datasheet

Why does my PIC32 run slower than expected? Haven’t received registration validation E-mail? It must be in the datasheet. What language is your source in?

I don’t know why this should be. I’m now back to the first code but with a small adjustment. By coincidence, I am transitioning with one bit change only. Thanks for your help. It seems unlikely but it would explain the random nature of the results.

Maybe it’s a footnote in the datasheet.