SN74AHC138PW

Product Overview

• Category: Integrated Circuit
• Use: Decoder/Demultiplexer
• Characteristics: High-speed, low-power, 3-to-8 line decoder/demultiplexer
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Converts a binary input into a corresponding output line
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2 V to 5.5 V
• Input Voltage Range: 0 V to VCC
• Output Voltage Range: 0 V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 4.5 ns (typical)
• Output Current: ±8 mA
• Number of Inputs: 3
• Number of Outputs: 8

Detailed Pin Configuration

The SN74AHC138PW has a total of 16 pins:

1. GND (Ground)
2. A0 (Input A0)
3. A1 (Input A1)
4. A2 (Input A2)
5. Y0 (Output Y0)
6. Y1 (Output Y1)
7. Y2 (Output Y2)
8. Y3 (Output Y3)
9. Y4 (Output Y4)
10. Y5 (Output Y5)
11. Y6 (Output Y6)
12. Y7 (Output Y7)
13. E1 (Enable Input 1)
14. E2 (Enable Input 2)
15. E3 (Enable Input 3)
16. VCC (Supply Voltage)

Functional Features

• Converts a 3-bit binary input into one of the eight corresponding output lines
• Enables easy decoding and demultiplexing of digital signals
• High-speed operation allows for efficient data processing
• Low-power consumption makes it suitable for battery-powered devices
• Wide supply voltage range provides flexibility in various applications

Advantages and Disadvantages

Advantages: - High-speed operation - Low-power consumption - Wide supply voltage range - Compact TSSOP package - Easy integration into electronic circuits

Disadvantages: - Limited number of inputs and outputs - Not suitable for complex decoding tasks

Working Principles

The SN74AHC138PW works based on the principle of binary decoding. The three input lines (A0, A1, A2) represent a 3-bit binary code. Depending on the combination of these input lines, one of the eight output lines (Y0 to Y7) is activated. The enable inputs (E1, E2, E3) control the overall operation of the decoder/demultiplexer.

Detailed Application Field Plans

The SN74AHC138PW is commonly used in various digital systems and applications, including:

1. Address decoding in microcontrollers and microprocessors
2. Memory selection in RAM and ROM modules
3. Data routing in multiplexers and data selectors
4. Signal demultiplexing in communication systems
5. Control signal generation in industrial automation

Detailed and Complete Alternative Models

1. SN74AHC138N: DIP (Dual Inline Package) version of the same decoder/demultiplexer IC.
2. CD74HC138E: Equivalent decoder/demultiplexer IC from a different manufacturer.
3. 74HCT138: Similar decoder/demultiplexer IC with TTL compatibility.

These alternative models offer similar functionality and can be used as substitutes for the SN74AHC138PW in various applications.

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