The 74LS46 IC features active low outputs designed for driving common – anode LEDs or incandescent indicators directly. The output of the IC always comes in TTL which makes it easy to work with other TTL devices and microcontrollers. The IC offers a wide variety of features which include Lamp-Test Provision & Leading/Trailing Zero Suppression. The IC 74LS46 is smaller in size and it has a much faster speed which makes it reliable in every kind of device.
What is a BCD – 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.
74LS46 Key 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
74LS46 Pinout
| 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 |
| 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 | Chip Supply Voltage |
Applications
The 74LS46 IC has a number applications, a few are listed below:
- It is usually used in devices such as displays for calculators, digital watches & displays, etc.
74LS46 Datasheet
You can download the 74LS46 BCD – 7 Segment Decoder IC Datasheet from the link given below:
See Also: 7408 2-Input AND Gate | 7407 Hex Buffer IC | 7404 NOT Gate IC
