SN74LS348DR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Decoder/Driver
• Characteristics: TTL Logic, 8-Line to 3-Line Priority Encoder
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Converts 8 input lines into a 3-bit binary output
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.75V to 5.25V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 15ns (typical)
• Power Dissipation: 500mW (max)

Detailed Pin Configuration

1. GND (Ground)
2. A0 (Input Line 0)
3. A1 (Input Line 1)
4. A2 (Input Line 2)
5. A3 (Input Line 3)
6. A4 (Input Line 4)
7. A5 (Input Line 5)
8. A6 (Input Line 6)
9. A7 (Input Line 7)
10. E1 (Enable Input 1)
11. E2 (Enable Input 2)
12. E3 (Enable Input 3)
13. Y0 (Output Bit 0)
14. Y1 (Output Bit 1)
15. Y2 (Output Bit 2)
16. VCC (Supply Voltage)

Functional Features

• Converts 8 input lines into a 3-bit binary output
• Prioritizes the input lines based on their order
• Provides an active-low enable input for each output bit
• Utilizes TTL logic for reliable operation
• Low propagation delay time for fast response

Advantages and Disadvantages

Advantages: - Compact SOIC package for space-saving integration - Wide operating temperature range for versatile applications - Low power dissipation for energy efficiency - Fast propagation delay time for quick data processing

Disadvantages: - Limited number of input lines (8) - Limited number of output bits (3) - Requires external enable inputs for each output bit

Working Principles

The SN74LS348DR is an 8-line to 3-line priority encoder. It converts the 8 input lines into a 3-bit binary output, prioritizing the input lines based on their order. The active-low enable inputs allow the user to control the output bits selectively. The TTL logic used in the IC ensures reliable operation and low propagation delay time, making it suitable for applications requiring fast data processing.

Detailed Application Field Plans

The SN74LS348DR can be used in various applications, including but not limited to:

1. Data Encoding: Convert multiple input signals into a compressed binary representation.
2. Priority Control: Assign priority levels to different input sources for efficient resource allocation.
3. Address Decoding: Decode memory addresses to select specific memory locations.
4. Interrupt Handling: Prioritize interrupt requests from different sources in a microcontroller system.
5. Multiplexing: Combine multiple input signals into a single output line using priority encoding.

Detailed and Complete Alternative Models

1. SN74LS148: 8-Line to 3-Line Priority Encoder with Open Collector Outputs
2. CD74HC148: High-Speed CMOS Logic 8-to-3 Line Priority Encoder
3. MC14532B: Binary Priority Encoder with Latch Enable

These alternative models offer similar functionality to the SN74LS348DR and can be considered as alternatives depending on specific requirements and availability.

Word count: 446 words