CD datasheet, CD pdf, CD data sheet, datasheet, data sheet, pdf, National Semiconductor, BCD-to-7 Segment Latch/Decoder/Driver. The CDBC BCD-to-seven segment latch/decoder/ driver is constructed with complementary MOS (CMOS) enhancement mode devices and NPN bipolar. said circuitry and specifications. Page 9. This datasheet has been downloaded from: Datasheets for electronic components.

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Full text of “IC Datasheet: MOS LSI databook”

All of your questions are answered in the official datasheet here: How the BCD to 7 segment display dtasheet works is it has 4 pins that intake a binary value. Those are symbol for LED, to represent the 7-segment display, not normal diodes.

LT means Lamp Test and the ‘bar’ i. The table below summarizes the binary input values to the decimal digit shown on the 7 segment display. Specific testing of all parameters of each device datashet not necessarily.

Using the 7 segments, you can make any decimal digit. These 4 data pins are fed binary values. However, if you do want to use this feature, you can simply connect it to a pull-up resistor with a pushbutton.

Note that the pin names and bar over some of them indicate their function. First we need to familiarize ourselves with the 7 segment module. The binary value is the equivalent of the decimal value of 6. This calculator will help you figure out the resistor size http: When pressed down, it would be LOW and turn on all the outputs.


Your name or email address: When low, the display shows the digit corresponding to the value on the data inputs.

Your email address will not be published. Since this is being powered by a 9V battery, I am using 1. If the pushbuttons are pressed, they go to a HIGH state. For normal operation, the pin must be high. This connection is available on pins 3 and 8. So, for example, if we input into the data pins, we get the number 0.

Being that we don’t wish to use this feature, we cd45111 connect it permanently HIGH.

When unpressed, the pin will be HIGH. The segments are then displayed on the basis of those internal registers. If the voltage is too high or the resistor too low think of the wire being a resistorthe current going through the LED will exceed the maximum forward current and burn out the LED.

This is why it’s called binary coded decimal.


When LOW, this feature is not activated. These data pins are referred to in the datasheet as D, B, C, and A. When pressed, it will go LOW and turn off all the outputs. Being that we don’t want the blanking feature activated, we simply connect it permanently to HIGH.

When LOW, 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.


These are the pins we attach to each of the corresponding pins on the 7 segment LED display. The 4 input data pins, which control the digit which is shown on the 7-segment LED display, are D, C, B, and A which are pins 6, 2, 1, and 7, respectively. Pin 4 is the Blanking pin. This chip saves us a lot of work for that reason. Without the pushbuttons being pressed, the datashet are all in a LOW state. This means that the negative side of all the LEDs are connected together.

What you need to do is select the appriate size resistor which will ensure you datassheet have decent current goiing through the LED without burning it out. No, create an account now. Remember Me Lost your password? Dec 29, 6. Quote of the day. You should now see a 4 on the 7 segment LED display.

Jun 8, 1, Now controlling a 7 segment display like this is OK, but we can do much fatasheet.

(PDF) cd4511 Datasheet download

The photo below shows the finished circuit. The decimal digit that the 7 segment display shows out depends on the binary value fed into the 4 input data pins DBCA. I used the LED resistor calculator on ohmslawcalculator.

In this circuit, we will build a BCD to 7 segment display datqsheet circuit using the chip.