When EL is LOW, the state of the segment outputs (Oa to. Og) is determined by the data on DA to DD. When EL goes HIGH, the last data. HEFBP datasheet, HEFBP pdf, HEFBP data sheet, datasheet, data sheet, pdf, NXP Semiconductors, BCD to 7-segment latch/decoder/driver. HEF Datasheet, HEF PDF, HEF Data sheet, HEF manual, HEF pdf, HEF, datenblatt, Electronics HEF, alldatasheet, free.

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When HIGH, this feature is not ativated. However, if you want to use this feature in your circuit, you simply connect a pull-up resistor to this pin with a pushbutton.

This pin is active LOW. These are the pins we daatasheet to each of the corresponding pins on the 7 segment LED display.

HEF BCD to 7-segment latch/decoder/driver courtesy of NXP

Connecting a pin to ground or 0V puts the pin in a LOW state or value. In this circuit, we will build a BCD to 7 segment display decoder circuit using the chip. At the side, the schematic of the IC’s pins. This is because we want to strobe the outputs to the 7 segment LED display. This pin would turn on all the outputs yef4511 connected LOW. So, for example, if we input into the data pins, we get the number 0. For example, a on the matches to a on the 7 segment LED display, b matches with b, etc.


The equivalent decimal value of the binary value we feed into the data input pins will be shown.

Using the pushbuttons, you can manually see how depending on which pushbuttons we press, how the output changes in response. Home English Datashheet with 7-segment display. When HIGH, the lamp test is activated. How the BCD to 7 segment display decoder works is it has 4 pins that intake a binary value. Otherwise, without this chip, to display all the decimal digitsyou would have to use 7 pins; so it saves us 3 pins. We cannot show any other digits on the 7 segment display.

Pin 3 is the LT pin, which is the Lamp Test pin. Being that they are all connected to pull-down resistors, they are all initially LOW when unpressed. Finally connect the outputs positive and negative power supply to the respective lines of the breadboard, then power up.

How to Build a 4511 BCD to 7 Segment Decoder Circuit

The chip takes in dztasheet binary value and displays the equivalent decimal value on the 7 segment display. To realize the circuit on a breadboard is necessary to insert, as usual, the three integrated straddling the two sections upper and lower. The combination of pushbuttons pressed and unpressed determines the decimal digits, according to the binary value.

Being that we don’t want the blanking feature activated, we simply connect it permanently to HIGH. Also, to allow a count of number of digits unlimited, ratasheet pin 7 is presented a positive signal every 10 in input carry-out. This counter is, in principle, the basic unit based on the digital clock in the section “projects”.


The counting may be increasing or decreasing by setting the pin In fact, if we had an oscillator tuned to the frequency of 1 Hz, and we apply this signal to the input of the counter HEFwe achieved a stopwatch or a countdown, depending on how the same is set by means of the presser If the pushbuttons are pressed, they go to a HIGH state. The 4 data pins are D, B, C, and A. So, for example, if we want to show the decimal number 5, we give a value of to the DCBA data pins.

Lastly, the 8 output pins are labeled a, b, c, d, e, f g, which are pins 12, 12, 11, 10, 9, 15, and The is a pin chip. Without the pushbuttons being pressed, the pins are all in a LOW state. We can show the digits 0 through 9. Below, we will also explain how BCD to 7 segment display decoders work in great detail, specifically the chip.

HEF Datasheet, PDF – Datasheet Search Engine

When pressed down, it would be LOW and turn on all the outputs. This is how we adjust the value of these data pins. When LOW, the pin is in strobe mode, meaning hdf4511 strobes the output to a given device, which in this case is a 7 segment LED display.