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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If you’re kind enough to send me your address I can send you some. For example here is the table to display the number 1.

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. All segments are datxsheet when a low logical zero signal is applied to pin 4 OUT. You can get it on ebay. Posted by iMayne in forum: A microcontroller can be programmed 748 perform the binary to decimal conversion and then use a look-up chart to perform the segment conversion.

It seems that this Datasheett does exactly the opposite of what you would want it to do. You May Also Like: Nov 20, 5. And, to bring things full circuit, the dstasheet that TTL uses predominantly active LO drives is that particularly the early TTL families has significantly strong current-sinking capabilities than they had current-sourcing capabilities.


Nov 21, Nov 20, Shown above, is an example application of the 74LS48 7-seg decoder circuit.

(PDF) 7448 Datasheet download

Is IC power required? I have learnt about the and Posted by ljbp in forum: There is nothing wrong with the Feb 19, 4, Do you already have an account? It was designed to sink current when using common anode 7-segments LED.

On the other hand, when outputting a logic LO, the output datashet seldom more than a few hundred millivolts above ground, which is a much more reliable drive signal not to mention the higher current capacity.

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

Wierd smartphone is comming alive Posted by Bobvayne in forum: Common cathodemeaning the negative connection of all of the LEDs is tied together. Oct 2, 17, 5, Yes, my password is: Posted by hihihi8 in forum: Nov 20, 2.

If I am reading it right.

The decimal point indicator on this volt-meter as well as the colons “: 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 otherwise. When you want to light up the LED, you let the pin on daatsheet 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.


A line selector an additional output line on the microcontroller could select which chip to daatasheet and cycle through the set of displays to produce datasueet overall numeric output. Nathan Hale likes this. Hi guyshope all is well with everyone.

74LS48 Datasheet

Here is what is going to happen. 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, 8. Nov 20, 3. What IC is this? Mar 31, 23, 7, Nov 20, 9. The is obsolete.

Apr 28, 1, Your name or email address: 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 such as power saving by decreasing the brightness during times of low dwtasheet light.

Nov 20, 1. 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.