According to the datasheet the A and A ICs feature active-low outputs designed for driving common-anode LEDs or. DMA, DMA. BCD to 7-Segment Decoders/Drivers. General Description. The 46A and 47A feature active-low outputs designed for. DECODER. The SN54/74LS48 is a BCD to 7-Segment Decoder consisting of NAND gates, input buffers and seven . This datasheet has been download from: .

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How to connect decoder to 7-segment display? Each segment on a 7-segment display is designated a letter A-G. Then just map datasheeh pins correctly again, from datasheet:.

Note that this is an ancient display and an ancient 744 chip both are museum old and because it’s TTL open inputs will read as ‘high’. Then just map the pins correctly again, from datasheet: I’ve connected a decoder to 7-segment display as shown in figure. Like the other two most popular answers, your 7 segment display needs to be connected to the properly Outputs to Seven-segment display inputs: Spehro Pefhany k 4 This is standard and is shown in the SN datasheet:.

ON Semiconductor – datasheet pdf

This is standard and is shown in the SN datasheet: You need to tie them to appropriate logic levels RBI should be ‘0’ if you want to display a zero. However, they don’t seem to mention that you need to have the inputs of the connected to something for dcoder to work like you want it to.

Note that this fatasheet illustration is a bit messed up and the bottom segment is D not Eand next segment clockwise lower left is E.

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Armandas 6, 1 23 Simply wire the respective letters a.

7447 – 7447 BCD to 7-Segment Decoder/Driver with Open Collector Output Datasheet

Danny Sebahar 9. Would you like to answer one of these unanswered questions instead? The pinout is here:. Here is a link to a video I made on instagram of mine working using this schematic: When I connect an input, the LEDs doesn’t form numbers but they light up randomly.

Thank you for your interest in this question. Home Questions Tags Users Unanswered. You can use a diode tester or a simple voltage source and a resistor to determine the pinout of your particular display. Decoedr 5 should go to GND. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site the association bonus does not count.

I just want to know the right way to connect the output pins of to the pins of 7-segment display? Further, this really old chip saved a few transistors by not fully decoding inputs above 0x09, so 0x0A.

Michael George 1, 8 34 The pinout is here: