74LS145 is a member of the 74XXYY IC series. The 74LS145 is fabricated with the Schottky barrier diode process for high speed. The 74LS145 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.
What is a BCD To Decimal Decoder?
A Binary TO Decimal Decoder converts coded inputs into coded outputs, where the input and output codes are different and decoders are available to “decode” either a Binary or BCD (8421 code) input pattern to typically a Decimal output code. A decoder’s output code usually has more bits than its input code, practical “binary decoder” circuits include 2-to-4, 3-to-8, and 4-to-16 line configurations. A BCD to Decimal Decoder consists of eight inverters and ten four-input NAND gates. The inverters are connected in pairs to make BCD input data available for decoding by the NAND gates.
74LS145 Pinout
74LS145 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | Q(0) | Decimal Output 0 |
| 2 | Q(1) | Decimal Output 1 |
| 3 | Q(2) | Decimal Output 2 |
| 4 | Q(3) | Decimal Output 3 |
| 5 | Q(4) | Decimal Output 4 |
| 6 | Q(5) | Decimal Output 5 |
| 7 | Q(6) | Decimal Output 6 |
| 8 | GND | Ground Pin |
| 9 | Q(7) | Decimal Output 7 |
| 10 | Q(8) | Decimal Output 8 |
| 11 | Q(9) | Decimal Output 9 |
| 12 | D(P3) | BCD Input Pin D |
| 13 | C(P2) | BCD Input Pin C |
| 14 | B(P1) | BCD Input Pin B |
| 15 | A(P0) | BCD Input Pin A |
| 16 | Vcc | Chip Supply Voltage |
74LS145 Features & Specifications
- Function: BCD to Decoder
- Technology Family: LS
- VCC (Min): 4.75V
- VCC (Max): 5.25V
- No. of Channels: 1
- Voltage (Nom): 5V
- Configuration: 4:10
- Type: Standard
- IOL (Max): 80mA
- IOH (Max): -20mA
- Rating: Catalog
- Operating temperature range: 0°C to 70°C
- Bits (#): 10
- Digital input leakage (Max): 5uA
- ESD CDM: 0.75KV
- ESD HBM: 2KV
Applications
- The chip provides TTL outputs that are needed in some systems.
You can download this Datasheet for 74LS145 BCD to Decimal Decoder from the link given below:
See Also: 74LS124 Dual Voltage Controlled Oscillator IC | 74LS93 4-Bit Binary/Decade Counter IC | 74LS91 8-Bit Shift Storage Register IC
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