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. Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise .
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(PDF) 74LS145 Datasheet download
The bases of the bipolars would be connected to the outputs of the 74LS via resistors. BCD inputs and provide appropriate outputs to drive digit incandescent displays. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur.
If you want to used the FET, substitute the source for the emitter, the gate for the base, and the drain for the collector. Search Only Within This Topic.
74LS145 Datasheet PDF
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The dafasheet of the HV drivers would be connected to collectors of the bipolars.
74LS Datasheet PDF / TI –
Do I need to put an inverters between the 74LS and the bipolars? All outputs remain off for all invalid binary input conditions.
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Subject of the new topic: Thanks for your help on this guys! Medias this blog was made to help people to easily download or read PDF files.
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. You can skip the bipolar alltogether, and connect your pull-up directly to 12V. I would then have bipolar NPN transistors with the collectors connected to 12V via resistors. I amy have misundertood you completely, but I think there is a much simpler solution.
I assume that this means that I connect the outputs to my logic VCC via 74ps If the 74LS will sink enough current, I think you should be able to meet your needs with a cascode stage, and this will only 744ls145 one transistor and maybe one resistor per output.
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This is certainly a technique to apply for other applications I have a LOT datasheeg 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.
Since the outputs of the LS are dafasheet low when selected, and the FET gate is active high, the transistor as 74ls14 show it in your picture gives the inversion you need. So, for the meantime, it looks like my original plan stands, minus the base resistors thanks John! The new topic will begin with this message.