SN74LVC138APWE4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Decoder/Demultiplexer
• Characteristics: Low-Voltage CMOS Logic, 3-to-8 Line Decoder/Demultiplexer
• Package: TSSOP-16
• Essence: High-performance digital logic solution for decoding and demultiplexing applications
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Operating Frequency: 100 MHz
• Number of Inputs: 3
• Number of Outputs: 8
• Propagation Delay: 2.9 ns (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The SN74LVC138APWE4 has a total of 16 pins, which are assigned as follows:

1. GND (Ground)
2. A0 (Input A0)
3. A1 (Input A1)
4. A2 (Input A2)
5. /G1 (Enable Input)
6. Y0 (Output Y0)
7. Y1 (Output Y1)
8. Y2 (Output Y2)
9. Y3 (Output Y3)
10. Y4 (Output Y4)
11. Y5 (Output Y5)
12. Y6 (Output Y6)
13. Y7 (Output Y7)
14. VCC (Supply Voltage)
15. /G2A (Enable Input)
16. /G2B (Enable Input)

Functional Features

• Decodes a 3-bit binary input into one of eight mutually exclusive outputs
• Can be used as a demultiplexer to route a single input signal to one of eight output lines
• Low-voltage CMOS technology allows for compatibility with both 3.3V and 5V systems
• High-speed operation with low power consumption
• Schmitt-trigger inputs provide hysteresis, enhancing noise immunity

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows for versatile use in various applications - Fast propagation delay enables high-speed data processing - Compact TSSOP-16 package saves board space - Low power consumption contributes to energy efficiency

Disadvantages: - Limited number of inputs and outputs restricts the complexity of applications - Not suitable for high-voltage applications due to its low-voltage design

Working Principles

The SN74LVC138APWE4 is based on CMOS technology, which utilizes complementary pairs of MOS transistors to implement logic functions. It operates by decoding a 3-bit binary input (A0, A1, A2) and activating the corresponding output line (Y0-Y7) based on the input combination. The enable inputs (/G1, /G2A, /G2B) control the functioning of the decoder/demultiplexer.

Detailed Application Field Plans

The SN74LVC138APWE4 finds application in various fields, including:

1. Address Decoding: Used in microcontrollers and memory systems to decode address signals and select specific memory locations.
2. Data Routing: Employed in communication systems to route data packets to different destinations based on the input address.
3. Multiplexing: Utilized in digital multiplexers to select one of multiple input signals and transmit it to a single output line.
4. Control Systems: Integrated into control circuits to enable the selection of different control signals based on the input configuration.

Detailed and Complete Alternative Models

1. 74HC138: Similar 3-to-8 line decoder/demultiplexer with TTL logic levels.
2. CD74HCT138: High-speed CMOS version of the decoder/demultiplexer.
3. SN54LVC138A: Equivalent low-voltage CMOS decoder/demultiplexer in a different package.

These alternative models provide similar functionality and can be used as substitutes for the SN74LVC138APWE4 depending on specific requirements.

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