SN74LS47N datasheet, pinout & circuit
- Display Type: LED
- Configuration: 7 Segment
- Interface: BCD
- Package: 16-DIP (0.300, 7.62mm)

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SN74LS47N electronic component
SN74LS47N Pinout Equivalent
The SN74LS47N is a BCD to seven-segment display decoder/driver manufactured by Texas Instruments (TI), which is designed to drive common anode LED digital tubes.The main principle of operation of the SN74LS47N is to convert the 4-bit BCD code (0-9) into the corresponding seven-segment signals. Due to its high reliability, low power consumption and compatibility with TTL levels, it is widely used in digital instruments, electronic clocks and watches, industrial control panels, calculators and other devices that require LED digital tube displays.Below I will describe the pin functions of the SN74LS47N and recommend some of its alternative devices for customers to choose from.
Here’s the detailed pin definition and functional description of the SN74LS47N
Pin | Name | Function Description |
---|---|---|
1 | B | Second bit of BCD input |
2 | C | Third bit of BCD input |
3 | LT | Light test input (low level valid, forcing all segments to light) |
4 | BI / RBO | Blanking input / traveling wave blanking output (close all segments at low level) |
5 | RBI | Travelling wave blanking input (for blanking control in multi-digit display) |
6 | D | Fourth bit of BCD input (MSB) |
7 | A | Lowest bit of BCD input (LSB) |
8 | GND | Connected to ground |
9 | e | Segment e of seven segment output |
10 | d | Segment d of seven segment output |
11 | c | Segment c of seven segment output |
12 | b | Segment b of seven segment output |
13 | a | Segment a of seven segment output |
14 | g | Segment g of seven segment output |
15 | f | Segment f of seven segment output |
16 | VCC | Power Supply Positive (+5V) |
If the customer does not want to replace the PCB board, directly replace the SN74LS47N by using the DM74LS47 (ON Semiconductor) or 74LS47 (NXP), which are fully compatible with the SN74LS47N pins and functions and are designed for common anode digital tubes.
74LS47 (NXP)
74LS47