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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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. I assume that this means that I connect the outputs to my logic VCC via 74ps The bases of the bipolars would be connected to the outputs of the 74LS via resistors.
74LS Datasheet(PDF) – Hitachi Semiconductor
Thanks for your help on this guys! I amy have misundertood you completely, but I think there is a much simpler solution.
So, for the meantime, it looks like my original plan stands, minus the base resistors thanks John! BCD inputs and provide appropriate outputs to drive digit incandescent displays. You can skip the bipolar alltogether, and connect your pull-up directly to 12V.
Subject of the new topic: Your email is included with the abuse report. All outputs remain off for all invalid binary input conditions. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts.
Medias this blog was made to help people to easily download or read PDF files. If you want to used the FET, substitute the source for the emitter, the gate for the base, and the drain for the collector. Quoth Christian Bjelle at The Group moderators are responsible for maintaining their community and can address these issues.
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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. Search Only Within This Topic.
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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 require one transistor and maybe one resistor per output. 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.
The new topic will begin with this message. The gates of the HV drivers would be connected to collectors of the bipolars. Do I need to put an inverters between the 74LS and the bipolars? I would then have bipolar NPN transistors with the collectors connected to 12V via resistors.