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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Pin 3 is the LT pin, which is the Lamp Test pin. These 4 data pins are fed binary values. It’s simply to test all the outputs to check if they turn on.

HEF Datasheet, PDF – Datasheet Search Engine

At the side, the schematic of the IC’s pins. In hev4511, the 7-segment display will show how many times there has been an event, which in this case is the push of a button of the type normally open. This is because we want to strobe the outputs to the 7 segment LED display.

The decimal digit that the 7 segment display shows out depends on the binary value fed into the 4 input data pins DBCA. These are the pins we attach to each of the corresponding pins on the 7 segment LED display. To realize the circuit on he4511 breadboard is necessary to insert, as usual, the three integrated straddling the two sections upper and lower.

This establishes sufficient power to the chip. The binary value is the equivalent of the decimal value of 6. In this circuit, we will start the BCD to 7 segment display decoder with the most basic circuit. These pins are all connected to pull-down resistors.


When unpressed, the pin will be HIGH. We cannot show any other digits on the 7 segment display. Being that they are all connected to pull-down resistors, they are all initially LOW when unpressed.

How to Build a 4511 BCD to 7 Segment Decoder Circuit

The chip takes in a binary value and displays the equivalent decimal value on the 7 segment display. Below, we will also explain how BCD to 7 segment display decoders work in great detail, specifically the chip. This pin would turn on all xatasheet outputs if connected LOW. The decimal equivalent of the binary value that it holds will be displayed on the 7 segment display. When Datadheet, the pin is in strobe mode, meaning it strobes the output to a given device, which in this case is a 7 segment LED display.

In this circuit, we will build a BCD to 7 segment display decoder circuit using the chip. The 4 bits ABCD coming from the meter are applied datashewt the corresponding inputs 7 A 1 B 2 C 6 D of the integrated decoder, which in turn ignites the combination of two or more LEDs of the display coherently the figure to be dztasheet If we input a binary value into the data pins, we get the corresponding decimal digit equivalent shown out on the 7 segment display.

Without the pushbuttons being pressed, the pins are all in a LOW state.

This counter is, in principle, the basic unit based on the digital clock in the section “projects”. The really makes it much simpler to work with single 7 segment LED displays. The equivalent decimal value of the binary value we feed into the data input pins will be shown.

The 4 data pins datasheft D, B, C, and A. With the binary value input, the equivalent decimal value of that binary number is dataasheet on the 7 segment display. However, if you do want to use this feature, you can simply connect it to a pull-up resistor with a pushbutton. Being that we don’t want the blanking feature activated, we simply connect it permanently to HIGH.


The combination of pushbuttons pressed and unpressed determines the decimal digits, according to the binary value. When HIGH, it is store mode. When HIGH, the lamp test is activated.

Pin 4 is the Blanking pin. You should now see a 4 on the 7 segment LED display. The pulses on the pin 15 are counted and the value is presented in BCD code on 4 pins: So we can see which combinations of pushbuttons turned on displays which decimal values. Obviously, the event to be counted may be anything that can be converted into electrical impulse.

Also arranging the display across the two sections that connect them is not, by interposing the resistor voltage drop, corresponding to pins of the IC following the pattern in the datasheet of the same, making sure to connect the output of the IC to the corresponding leg segment A of the display, and so for the other 6.

This pin is active LOW. Depending on the combination of pushbuttons being pressed determines the decimal digit that will be shown on the 7 segment LED display; this is summarized in the table above. We will connect this chip by itself to pushbuttons. So in normal operation, it’s held LOW.