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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The tcsl on the datasheet is 50ns so does that mean any glitch shorter than 50ns won’t have any effect? Essentials Only Full Version.

HC (SLS) – 1-of-8 Decoder/Demultiplexer

I’m off glitch hunting. This is a best guess: I’m now back to the first code but with a small adjustment. Is this a clue? Hey – that’s an interesting thought. However, I notice in trawling for source code, that an example from Microchip applies a 1ms low-going pulse to the CS. Debug datashete automatically disabled 16F88 cannot set internal oscillator frequency beyond Thanks for your help.

Until I crack this, I’m stymied. So try transitioning between Dtasheet and Ym where n and m only have one address bit different.


Thanks again for your help! I take your point about the but there is one bit of exculpatory evidence: Could a tiny bit of ringing on the line upset the device? Haven’t received registration validation E-mail? Microchip are usually pretty thorough. User Control Panel Log out. Changing the address pins with the enables strapped active is likely to cause glitches.

MCP3551 – Odd results?

This is really proving problematic. This is the scenario: Moreover, even if there is a splurge on the falling edge, it shouldn’t have any further effect What language is your source in?

Maybe it’s a footnote in the datasheet. Please bear in mind that I have been tinkering with the code for several days and have tried many variations. Any help gratefully received.

HC138 Datasheet

M Super Datasgeet Total Posts: And so seems to be the case. It’s bound to be some devilish little detail confounding me. It seems unlikely but it would explain the random nature of the results. The waveforms are perfect. I cannot see anywhere where I have broken any rules.

Forum Themes Elegant Mobile. Therefore, it needs to be. 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.

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If it is, I clock the result out. It must be in the datasheet.

ic hc datasheet & applicatoin notes – Datasheet Archive

But I’ve read it and read it and I cannot see anything that would tell me. Forums Posts Latest Posts. I then read SDO to see if a conversion xatasheet ready. Also, I see in one app note schematic, a 1K resistor in each digital line.

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!

It does seem to require a 1ms start pulse. By coincidence, I am transitioning with one bit change only.

Why does my PIC32 run slower than expected? MCP – Odd results? That should be glitch free and will do for testing.

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