Complete Guide to Logic Gates
BCD to 7-segment decoder (SN7447A)
The SN7447A is a BCD to 7-segment decoder with open collector active-low outputs, designed for common-anode displays. It includes digit on/off control and lamp test functionality. It is TTL logic equivalent to the LS47 and widely used in classic projects.
Datasheet and Pin Diagram
The datasheet provides crucial technical information about this integrated circuit, including pin diagram, electrical characteristics and package information.
The SN7447A BCD to 7-segment decoder is a fundamental component in digital electronics. Its configuration is 4 BCD inputs, 7 display outputs. Its operation is based on the logic function .
Applications
- 7-segment displays
- Digital counters
- Measuring instruments
- Digital clocks
- Calculators
This integrated circuit is used in various digital logic applications and embedded systems.
Truth Table
The truth table illustrates the output of the SN7447A BCD to 7-segment decoder for each possible combination of its logic inputs.
| BCD (DCBA) | Display | Segments |
|---|---|---|
| 0000 | 0 | abcdef |
| 0001 | 1 | bc |
| 0010 | 2 | abged |
| 0011 | 3 | abgcd |
| 0100 | 4 | fgbc |
| 0101 | 5 | afgcd |
| 0110 | 6 | afgedc |
| 0111 | 7 | abc |
| 1000 | 8 | abcdefg |
| 1001 | 9 | abcdfg |
Technical Specifications
General Information
BCD-7seg Decoder
4 BCD inputs, 7 display outputs
Electrical Characteristics
4.75V - 5.25V
20mA
15ns typ
0掳C to 70掳C
Package Information
DIP-14
0.1" (2.54mm)
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Additional Information
To deepen your understanding of the SN7447A BCD to 7-segment decoder, you can consult additional resources on Boolean algebra and digital circuit design. Experimenting with circuit simulators or building physical circuits will help you consolidate your understanding.