Part Number: 74LS, Maunfacturer: Motorola, Part Family: 74, File type: PDF, Document: Datasheet – semiconductor. 74LS datasheet, 74LS circuit, 74LS data sheet: MOTOROLA – 1-OF- 10 DECODER/DRIVER OPEN-COLLECTOR,alldatasheet, datasheet. 74LS datasheet, 74LS circuit, 74LS data sheet: ONSEMI – 1-of Decoder / Drvier Open-Collector,alldatasheet, datasheet, Datasheet search site .
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Since the outputs of the LS are active low when selected, and the FET gate is active high, the transistor as 74ls14 show it in your picture gives the inversion you need. If the 74LS will sink enough current, I think you should be datasheeet to meet your needs with a cascode stage, and this will only require one transistor and maybe one resistor per output.
If you want to datazheet the FET, datasyeet the source for the emitter, the gate for the base, and the drain for the collector. This is certainly a technique to apply for other applications I have a LOT to learn in the analogue fieldbut I think that we would have the same issue that John pointed out — the control signals are inverted and still need to be flipped before they get to the output device.
74LS145 Datasheet PDF
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The new topic will begin with this message. I would then have bipolar NPN transistors with the collectors connected to 12V via resistors. Search Only Within This Topic. Subject of the new topic: Medias this blog was made to help people to easily download or read PDF files.
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I assume that this means that I connect the outputs to my logic VCC via 74ps I amy have misundertood you completely, but I think there is a much simpler solution. Do I need to put an inverters between the 74LS and the bipolars?
All outputs remain off for all invalid binary input conditions. You can skip the bipolar alltogether, and connect your pull-up directly to 12V.
SK74LS/74LS NTE Equivalent NTE74LS IC-TTL BCD DECODE – Wholesale Electronics
That makes my life much easier, although I will have to check on the manufacturer of the devices that I have to make sure that they have the higher voltage tolerance. Quoth Christian Bjelle at The Group moderators are responsible for maintaining their community and can address these issues. BCD inputs and provide appropriate outputs to drive digit incandescent displays.
Thanks for your help on this guys! Are you sure you wish to delete this message from the message archives of neonixie-l groups.
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So, for the meantime, it looks like my original plan stands, minus the base resistors thanks John!
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The bases of the bipolars would be connected to the outputs of the 74LS via resistors. The gates of the HV drivers would be connected to collectors of the bipolars.