SN74AHCT138DGVR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Decoder/Demultiplexer
• Characteristics: High-speed, low-power, 3-to-8 line decoder/demultiplexer
• Package: VSSOP-16
• Essence: Converts a binary input into a corresponding output based on the selected line
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Operating Frequency: 50 MHz
• Low Power Consumption: ICC = 4µA (Max)
• High Noise Immunity: VNIH = VNIL = 28% VCC (Min)

Detailed Pin Configuration

The SN74AHCT138DGVR has a total of 16 pins, each serving a specific purpose:

1. GND: Ground
2. A0: Address Input 0
3. A1: Address Input 1
4. A2: Address Input 2
5. E1: Enable Input 1
6. Y0: Output 0
7. Y1: Output 1
8. Y2: Output 2
9. Y3: Output 3
10. Y4: Output 4
11. Y5: Output 5
12. Y6: Output 6
13. Y7: Output 7
14. E2: Enable Input 2
15. VCC: Positive Power Supply
16. GND: Ground

Functional Features

The SN74AHCT138DGVR is designed to decode a three-bit binary input and generate eight mutually exclusive outputs. It operates at high speed while consuming low power, making it suitable for various applications. The decoder/demultiplexer has two enable inputs (E1 and E2) that can be used to activate or deactivate the outputs based on specific conditions.

Advantages and Disadvantages

Advantages: - High-speed operation - Low power consumption - Wide supply voltage range - High noise immunity

Disadvantages: - Limited number of input lines - Only supports binary inputs

Working Principles

The SN74AHCT138DGVR works by accepting a three-bit binary input (A0, A1, A2) and decoding it into one of the eight output lines (Y0-Y7). The enable inputs (E1 and E2) control the activation of the outputs. When both enable inputs are high, all outputs are active. By manipulating the address inputs, specific output lines can be selected.

Detailed Application Field Plans

The SN74AHCT138DGVR is commonly used in various digital systems where decoding and demultiplexing functions are required. Some typical application fields include:

1. Address Decoding: Used in microprocessors and memory systems to decode memory addresses.
2. Data Demultiplexing: Used to route data from a single source to multiple destinations.
3. Control Signal Generation: Used to generate control signals for different components in a system.
4. Display Multiplexing: Used in multiplexed display systems to select specific segments or digits.

Detailed and Complete Alternative Models

1. 74HC138: Similar functionality but operates at a higher voltage range (2V to 6V).
2. CD74HCT138: Compatible alternative with similar specifications and pin configuration.
3. SN54AHCT138: Equivalent model with wider temperature range (-55°C to 125°C).

These alternative models provide similar decoding and demultiplexing capabilities, allowing users to choose the most suitable option based on their specific requirements.

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