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;.

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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! Thanks for your help. The waveforms are perfect.

Thanks again for your help! It seems unlikely but it would explain the random nature of the results. The transitions from Y0 being active to Yn being active so any glitches ought to appear on the other outputs. By coincidence, I am transitioning with one bit change only.

MCP3551 – Odd results?

This is the scenario: Debug breakpoints automatically disabled 16F88 cannot set internal oscillator frequency beyond I’m now back to the first code but with a small adjustment. 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. Meanwhile, thanks for your suggestion. Therefore, it needs to be. Also, I see in one app note schematic, a 1K resistor in each digital line.


It must be in the datasheet. I then h1c38 SDO to see if a conversion is ready.

SLS HC Series Datasheets. SL74HC, HC Datasheet.

What language is your source in? Maybe it’s a footnote in the datasheet. The tcsl on the datasheet is 50ns dwtasheet does that mean any glitch shorter than 50ns won’t have any effect?

M Super Member Total Posts: Microchip are usually pretty thorough. Forums Posts Latest Posts. But I’ve read it and read it and I cannot see anything that would tell me. Haven’t received registration validation Datashdet I’m off glitch hunting.

HC138 Datasheet

Is this a clue? Could a tiny datwsheet of ringing on the line upset the device? Essentials Only Full Version. It does seem to require a 1ms start pulse. I don’t know why this should be.

Until I crack this, I’m stymied. Why does my PIC32 run slower than expected? So try transitioning between Yn and Ym where n and m only have one address bit different.


That should be glitch free and will do for testing. Moreover, even if there is a splurge on the fatasheet edge, it shouldn’t have any further effect I have made some progress.

I cannot see anywhere where I have broken datasheeg rules. Sometimes a conversation with someone knowledgeable just frees up the brain a bit! It’s bound to be some devilish little detail confounding me. However, I notice in trawling for source code, that an example from Microchip applies a 1ms low-going pulse to the CS. Hey – that’s an interesting thought.