SN74AS158N

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Multiplexer
• Characteristics: High-speed, TTL compatible, 4-to-1 multiplexer
• Package: DIP (Dual In-line Package)
• Essence: Logic gate implementation of a multiplexer
• Packaging/Quantity: Available in tubes or reels, quantity varies based on supplier

Specifications

• Supply Voltage: 4.5V to 5.5V
• Input Voltage: 0V to VCC
• Output Voltage: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 9ns (typical)
• Input Capacitance: 10pF (typical)
• Output Current: ±8mA

Detailed Pin Configuration

The SN74AS158N has a total of 16 pins, which are assigned specific functions as follows:

1. A Select Input 1 (A1)
2. B Select Input 2 (B1)
3. C Select Input 3 (C1)
4. D Select Input 4 (D1)
5. Y Output
6. GND (Ground)
7. Y Output
8. D Select Input 4 (D2)
9. C Select Input 3 (C2)
10. B Select Input 2 (B2)
11. A Select Input 1 (A2)
12. Y Output
13. GND (Ground)
14. Y Output
15. VCC (Supply Voltage)
16. GND (Ground)

Functional Features

• The SN74AS158N is a 4-to-1 multiplexer that allows the selection of one out of four input signals to be routed to the output.
• It operates at high speeds and is compatible with TTL logic levels.
• The multiplexer is implemented using logic gates, providing a compact and efficient solution for signal routing.

Advantages and Disadvantages

Advantages: - High-speed operation allows for quick signal switching. - TTL compatibility ensures easy integration with existing digital circuits. - Compact DIP package facilitates easy soldering and PCB assembly.

Disadvantages: - Limited to 4-to-1 multiplexing, not suitable for applications requiring higher input/output configurations. - Requires external control signals for proper operation.

Working Principles

The SN74AS158N works based on the principles of digital logic. The select inputs (A1, B1, C1, D1) determine which input signal is routed to the output. The binary combination of these select inputs determines the active input. The selected input is then passed through internal logic gates to generate the output signal.

Detailed Application Field Plans

The SN74AS158N finds applications in various digital systems where signal routing is required. Some potential application fields include:

1. Data communication systems: Used for selecting different data sources or destinations.
2. Multiplexed displays: Enables the selection of different display segments or digits.
3. Address decoding: Facilitates the selection of specific memory locations in microprocessors.
4. Analog-to-digital converters: Allows the selection of different analog input channels.

Detailed and Complete Alternative Models

1. CD4051B: 8-channel analog multiplexer/demultiplexer IC.
2. SN74HC153: Dual 4-line to 1-line data selectors/multiplexers.
3. MC14051B: 8-channel analog multiplexer/demultiplexer IC.

These alternative models offer similar functionality to the SN74AS158N and can be used as replacements depending on specific requirements.

In conclusion, the SN74AS158N is a high-speed 4-to-1 multiplexer IC that finds applications in various digital systems. Its compact package, TTL compatibility, and efficient signal routing make it a versatile component in electronic designs.

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