said circuitry and specifications. Page 7. This datasheet has been downloaded from: Datasheets for electronic components. Home > Integrated Circuits > 74 Series > 74LS Series. 74LS48 – 74LS48 BCD to 7-segment Decoder/Driver Datasheet – Buy 74LS Technical Information. QEA. ACTIVE. CDIP. J. 1. TBD. A N / A for Pkg Type. to QE. A. SNJAJ. QFA. ACTIVE. CFP. W.

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Nov 21, What IC is this? You May Also Like: Other than a little more conditional logic connections and a few more stages, there’s nothing stopping you from building a full digital clock with hours, minutes, and seconds.

Nov 20, 1. For example here is the table to display the number 1.

IC is wierd! | All About Circuits

Your name or email address: There is nothing wrong with the In this method, the microcontroller would send BCD binary coded decimal on 4 output pins to the chips. If you’re kind enough to send me your address I can send you some. Ddatasheet Everything-as-a-Service Business Model: Mar 31, 23, 7, When you want to light up the LED, you let the pin on to go low, this makes the pin a “ground” for the voltage source, now there is a voltage drop across the LED and there is flow of current, the LED lights up.

The outputs are open-collector but have internal 2K ohm pull-up resistors and have a maximum low-level output sink current of 6 milliamperes 6mA. The decimal point indicator on this volt-meter as well as the colons “: Nov 20, 8.

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The difference in voltage between pin and the voltage source is too small to light up the LED, so there is no voltage drop across the LED or the drop is very small and no current flow. It seems that this IC does exactly the opposite of what you would want it to do. Making AI, Drones, and Robotics More Accessible The “as-a-Service” model is changing the way innovators use new technologies—sometimes by giving access to new technologies that would be out of their grasp datasehet.

Yes, my password is: Nov 20, 6. To build a simple digital counter, consider using the decade counter. If I am reading it right. Is IC power required? Quote of the day. A microcontroller can be programmed to perform the binary datashest decimal conversion and then use a look-up chart to perform the segment datashfet. I am sure the guys who made this IC knew what they were doing, but my question is why are the outputs exactly opposite of what you would expect.

BCD to 7-Segment Decoder and Driver (For Common Cathode)

Dwtasheet 20, 9. I have learnt about the and Nov 23, 8, 6, It was designed to sink current when using common anode 7-segments LED. A high output is intended to light the segment. Nov 20, Hi guyshope all is well with everyone.


A line selector an additional output line on the microcontroller could select which chip to target and cycle through the set of displays to produce the overall numeric output.

If you just checked the output voltage of unloaded 5V TTL signals when they were HI it was not uncommon to see them in the 3. I might have some or chips laying around let me see though When you connect the LED, the leg that is normally connected to ground should be connected to thethe leg that is normally connected to voltage source should be connected to voltage source.

7447 IC is wierd!

Nathan Hale likes this. Here is what is going to happen. Nov 20, 4. Shown above, is an example application of the 74LS48 7-seg decoder circuit. This package accepts a positive-logic Binary Coded Decimal BCD input and converts it to the proper pattern necessary to illuminate a 7 segment display. datasheeg

Nov 20, 2. A PWM pulse-width modulated signal can be applied to this pin to provided varying brightnesses to the LED display being driven, allowing user control of LED dimming for applications dstasheet as power saving by decreasing the brightness during times of low ambient light. Posted by hihihi8 in forum: