74LS159 is a member of the 74XXYY family of TTL ICs. This decoder utilizes TTL circuitry to decode four binary-coded inputs into one of sixteen mutually exclusive outputs when both the strobe inputs, G1 and G2, are low. The demultiplexing function is performed by using the 4 input lines to address the output line, passing data from one of the strobe inputs with the other strobe input low. The design concentrates for the chip to be used in high-performance memory-decoding or data-routing applications, requiring very short propagation delay times. The output of the IC always comes in TTL which makes it easy to work with other TTL devices and microcontrollers. The IC 74LS159 is smaller in size and it has a much faster speed which makes it reliable in every kind of device.
What is a Demultiplexer?
A demultiplexer is a combinational logic circuit designed to switch one common input line to one of several separate output lines. So, A demultiplexer converts a serial data signal at the input to a parallel data at its output lines.
74LS159 Key Features & Specifications
- Technology Family: LS
- Rating: Catalog
- VCC (min): 4.75V
- VCC (max): 5.25V
- Supply voltage: 1.0V to 5.5V
- Frequency at nominal voltage: 35 MHz
- Typical propagation delay: 21nS
- Low power consumption: 32mW
- Operating temperature: -40ºC to +125ºC
- ESD protection
- IOL (Max): 8mA
- IOH (Max): 8mA
- Balanced propagation delays
- Designed specifically for high speed
- Channels (#): 4
- Configuration: 4:16
- Product type: Standard
74LS159 Pinout
| Pin No. | Pin Name | Description |
|---|---|---|
| 1 | Y0 | Decoder Output Pin Y0 |
| 2 | Y1 | Decoder Output Pin Y1 |
| 3 | Y2 | Decoder Output Pin Y2 |
| 4 | Y3 | Decoder Output Pin Y3 |
| 5 | Y4 | Decoder Output Pin Y4 |
| 6 | Y5 | Decoder Output Pin Y5 |
| 7 | Y6 | Decoder Output Pin Y6 |
| 8 | Y7 | Decoder Output Pin Y7 |
| 9 | Y8 | Decoder Output Pin Y8 |
| 10 | Y9 | Decoder Output Pin Y9 |
| 11 | Y10 | Decoder Output Pin Y10 |
| 12 | GND | Ground Pin |
| 13 | Y11 | Decoder Output Pin Y11 |
| 14 | Y12 | Decoder Output Pin Y12 |
| 15 | Y13 | Decoder Output Pin Y13 |
| 16 | Y14 | Decoder Output Pin Y14 |
| 17 | Y15 | Decoder Output Pin Y15 |
| 18 | G1 | Strobe Input Pin G1 |
| 19 | G2 | Strobe Input Pin G2 |
| 20 | D | Decoder Input D |
| 21 | C | Decoder Input C |
| 22 | B | Decoder Input B |
| 23 | A | Decoder Input A |
| 24 | Vcc | Chip Supply Voltage |
Applications
The 74LS159 IC has a number of uses, some of them are listed as below:
- Serves the function of Speed synchronization of multiple motors in industries
74LS159 Datasheet
You can download the 74LS159 4-16 Decoder/Demultiplexer IC Datasheet from the link given below:
See Also: 74LS122 Retriggerable Monostable Multivibrator IC | 74LS109 Dual JK Positive Edge-Triggered Flip-Flop IC | 74LS92 4-Bit Divide By Twelve Binary Counter IC
