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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 I am reading it right.

Nov 20, 6. Nov 23, 8, daatasheet, However, if pins are limited on the microcontroller, it can be advantageous to use ICs in a multiplexing fashion to drive the 7-segment displays. Feb 19, 4, A high output is intended to light the segment. The Everything-as-a-Service Business Model: Nov 20, 4.

Datasheet, PDF – Alldatasheet

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.


Yes, my password is: 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.

Your name or email address: Nov 20, 9. Oct 2, 17, 5, Nov 20, 8.

Nov 20, 2. All segments are extinguished when a low logical zero signal is applied to pin 4 OUT. I might have some or chips laying around let me see though Is IC power required? There is nothing wrong with the A microcontroller can be programmed to perform the binary to decimal conversion and then use a look-up chart to perform the segment conversion. 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 ambient light.

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Shown above, is an example application of the 74LS48 7-seg decoder circuit. Posted by hihihi8 in forum: Here is what is going to happen.


Apr 28, 1, Common cathodemeaning the negative connection of all of the LEDs is tied datadheet. Wierd smartphone is comming alive Posted by Bobvayne in forum: 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 datasbeet is a voltage drop across the LED and there is flow of current, the LED lights up. Nathan Hale likes this.

And, to bring things full circuit, the reason 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. Hi guyshope all is well with everyone. Mar 31, 23, 7, For example here is the table to display the number 1.

Posted by iMayne in forum: