SN74LS47N. SN74LS47NSR. ACTIVE. SO. NS. Green (RoHS. & no Sb /Br). CU NIPDAU. LevelC-UNLIM. 0 to 74LS SNJAJ. ACTIVE. 74LS47 component details, pinout & Datasheet. 74LS47 is a BCD to 7-segment decoder/driver IC & It accepts a binary coded decimal as input and converts it. 74LS47 datasheet, 74LS47 pdf, 74LS47 data sheet, datasheet, data sheet, pdf, Fairchild Semiconductor, BCD to 7-Segment Decoder/Driver with Open-Collector .

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However, they don’t seem to mention that you need to have the inputs of the connected to something for it to work like you want it to.

I just want to know the right way to connect the output pins of to the pins of 7-segment display? Note that this is an ancient display and an ancient TTL chip both are museum old and because it’s TTL open inputs will read as ‘high’. This is standard and is shown in the SN datasheet:.


Spehro Pefhany k 4 You can use a diode tester or a simple voltage source and a resistor to determine the pinout of your particular display. Would you like to answer one of these unanswered questions instead?

Pin 5 should go to GND. Further, this really old chip saved a few transistors by not fully decoding inputs above 0x09, so 0x0A. Armandas 6, 1 23 Here is a link to a video I made on instagram of mine working using this decldificador Danny Sebahar 9.

Datasheet «SN54/74LS47»

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When I connect an input, the LEDs doesn’t form numbers but xatasheet light up randomly. You need to tie them to appropriate logic levels RBI should be ‘0’ if you want to display a zero.

ON Semiconductor

The pinout is here: This is standard and is shown in the SN datasheet: The pinout is here:. Michael George 1, 8 34 How to connect decoder to 7-segment display?


Thank you for your interest in this question. Simply wire the respective letters a. Each segment on a 7-segment display is designated a letter A-G.

Note that this datasheet illustration is a bit messed up and the dxtasheet segment is D not Eand next segment clockwise lower left is E. I’ve connected a decoder to 7-segment display as shown in figure.

DECODIFICADOR Y by Johan Andrade on Prezi

Like the other two most popular answers, your 7 segment display needs to be connected to the properly Outputs to Seven-segment display inputs: Because it has attracted low-quality or decodifciador answers that had to be removed, posting an answer now requires 10 reputation on this site the association bonus does not count.

Then just map the pins correctly again, from datasheet:.

Then just map the pins correctly again, from datasheet: