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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Further, this really old chip saved a few transistors by not fully decoding inputs above 0x09, so 0x0A.

I just want to know the right way to connect the output pins of to the pins of 7-segment display? This is standard and is shown in the SN datasheet:. You can use a diode tester or a simple voltage source and a datasheet to determine the pinout of your particular display. Spehro Pefhany k 4 Home Questions Tags Users Unanswered.

ON Semiconductor – datasheet pdf

How to connect decoder to 7-segment display? Each segment on a 7-segment display is designated a letter A-G.


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

Here is dataheet link to a video I made on instagram of mine working using this schematic: 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’. Michael George 1, 8 34 By using our site, you acknowledge that you have read and datxsheet our Cookie PolicyPrivacy Policyand our Terms of Service. Thank you for your interest in this question. Then just map the pins correctly again, from datasheet: This is standard and is shown in the SN datasheet: Pin 5 should go to GND.


Danny Sebahar 9. 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. The pinout is here: However, they don’t seem to mention that you need to have the inputs of the connected decofer something for it to work like you want it to.

ON Semiconductor

Note that this datasheet illustration is a bit messed up and the bottom segment is D not Eand next segment clockwise lower left is E. Would you like to answer one of these dagasheet questions instead?

The pinout is here:. Then just map the pins correctly again, from datasheet:. Simply wire the respective letters a.

Armandas 6, 1 23