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: .
Home Questions Tags Users Unanswered. Michael George 1, 8 34 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.
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. 747 6, 1 23 Would you like to answer one of these unanswered questions instead? This is standard and is shown in the SN datasheet:.
Then just map the pins correctly again, from datasheet:. Simply wire the respective letters a. Like the other two most popular answers, your 7 segment display needs to be connected to the properly Outputs to Seven-segment display inputs: Pin 5 should go to GND.
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 decoer it to. How to connect decoder to 7-segment display? Spehro Pefhany k 4 Further, this really old chip saved a few transistors by not fully decoding inputs above 0x09, so 0x0A.
I’ve connected a decoder to 7-segment display as shown in figure. Danny Sebahar 9. Each segment on a 7-segment display is designated a letter A-G.
The pinout is here: 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. I just want to know the right way to connect the output pins of to the pins of 7-segment display?
You can use a diode tester or a decoeer voltage source and a resistor to determine the pinout of your particular display. The pinout is here:.
Then just map the pins correctly again, from datasheet: When I connect an input, the LEDs doesn’t form numbers but they light up randomly. 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’.