The 74LS48 IC features active low outputs designed for driving common – anode LEDs or incandescent indicators directly. It accepts a binary coded decimal as input and converts it into a pattern to drive a seven-segment for displaying digits 0 to 9. The 74LS48 IC has a wide range of working voltage, a wide range of working conditions, and directly interfaces with CMOS, NMOS, and TTL. The output of the IC always comes in TTL which makes it easy to work with other TTL devices and microcontrollers. The IC 74LS20 is smaller in size and it has a much faster speed which makes it reliable in every kind of device.
What is a BCD-to-7 Segment Decoder?
A BCD to Seven Segment decoder is a combinational logic circuit that accepts a decimal digit in BCD (input) and generates appropriate outputs for the segments to display the input decimal digit.
74LS48 Pinout
74LS48 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | B | BCD input of the IC |
| 2 | C | BCD input of the IC |
| 3 | Display test/Lamp test | To test the display LED |
| 4 | Blank Input | To turn-off the LEDs of the display |
| 5 | Store | Store or strobe a BCD code |
| 6 | D | BCD input of the IC |
| 7 | A | BCD input of the IC |
| 8 | GND | Ground Pin |
| 9 | e | 7 segment output 1 |
| 10 | d | 7 segment output 2 |
| 11 | c | 7 segment output 3 |
| 12 | b | 7 segment output 4 |
| 13 | a | 7 segment output 5 |
| 14 | g | 7 segment output 6 |
| 15 | f | 7 segment output 7 |
| 16 | Vcc | Supply Voltage |
74LS48 Features & Specifications
- Function: Decoder, Demultiplexer
- Technology Family: LS
- VCC (Min): 4.75V
- VCC (Max): 5.25V
- Channels: 1
- Voltage (Nom): 5V
- Max Frequency at normal Voltage: 35Mhz
- tpd at normal Voltage (Max): 100 nsec
- Configuration: 4:7
- Type: Open-Collector
- IOL (Max): 3.2mA
- IOH (Max): -0.05mA
- Rating: Catalog
- Operating temperature range (C): 0 to 70
- Bits (#): 7
- Digital input leakage (Max): 5uA
- ESD CDM (kV): 0.75
- ESD HBM (kV): 2
Application
- It is usually used in devices such as a display for calculators, digital watches & displays, etc.
- They are also used in digital clocks, electronic meters, and other electronic devices that display numerical information.
You can download this Datasheet 74LS48 BCD to 7-Segment Display Decoder from the link given below:
See Also: 74LS20 Dual 4 – Input NAND IC | 74LS02 Quad Two Input NOR Gate| 7407 Hex Buffer IC
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