DS26C31TM

Product Overview

Category

The DS26C31TM belongs to the category of integrated circuits (ICs) used in digital communication systems.

Use

It is primarily used for differential line driver and receiver applications in various communication protocols, such as RS-422 and RS-485.

Characteristics

• High-speed operation: The DS26C31TM supports data rates up to 20 Mbps, making it suitable for high-speed communication.
• Differential signaling: It utilizes differential signaling to provide noise immunity and robustness in noisy environments.
• Wide supply voltage range: It can operate with a supply voltage ranging from 4.75V to 5.25V.
• Low power consumption: The DS26C31TM is designed to minimize power consumption, making it suitable for battery-powered devices.
• ESD protection: It incorporates built-in electrostatic discharge (ESD) protection to safeguard against damage during handling and operation.

Package

The DS26C31TM is available in a small outline package (SOP) with 16 pins.

Essence

The essence of the DS26C31TM lies in its ability to transmit and receive digital signals reliably over long distances, while maintaining signal integrity and minimizing noise interference.

Packaging/Quantity

The DS26C31TM is typically sold in reels or tubes, with quantities varying depending on the supplier. Common packaging options include reels of 250 or 1000 units.

Specifications

• Supply Voltage Range: 4.75V to 5.25V
• Data Rate: Up to 20 Mbps
• Operating Temperature Range: -40°C to +85°C
• Input/Output Logic Levels: TTL/CMOS compatible
• Output Current: ±60 mA
• Propagation Delay: 10 ns (typical)
• Power Dissipation: 500 mW (max)

Detailed Pin Configuration

The DS26C31TM features 16 pins, each serving a specific function:

1. VCC - Positive power supply
2. GND - Ground reference
3. RO+ - Non-inverting receiver output
4. RO- - Inverting receiver output
5. RE+ - Non-inverting receiver enable
6. RE- - Inverting receiver enable
7. DE - Driver enable
8. DI- - Inverting driver input
9. DI+ - Non-inverting driver input
10. YB - Complementary receiver output
11. YA - True receiver output
12. VBB - Negative power supply
13. B - Complementary driver output
14. A - True driver output
15. Z - Receiver output enable
16. NC - No connection (unused pin)

Functional Features

Differential Line Driver

The DS26C31TM functions as a differential line driver, converting digital signals into balanced differential outputs suitable for transmission over long distances. It provides high-speed operation and noise immunity, ensuring reliable data transmission.

Differential Line Receiver

It also serves as a differential line receiver, converting incoming differential signals back into digital logic levels. The DS26C31TM's receiver section is designed to tolerate common-mode voltage variations and reject common-mode noise, enhancing signal integrity.

Driver and Receiver Enable Control

The DS26C31TM includes control inputs for enabling or disabling the driver and receiver sections independently. This feature allows for flexible control of the communication link, conserving power when not in use.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data transmission.
• Differential signaling provides noise immunity and robustness.
• Wide supply voltage range allows for compatibility with various systems.
• Low power consumption makes it suitable for battery-powered devices.
• Built-in ESD protection enhances reliability.

Disadvantages

• Limited to differential signaling applications, not suitable for single-ended communication.
• Requires additional external components for complete system implementation.

Working Principles

The DS26C31TM operates based on the principles of differential signaling. It utilizes complementary driver outputs to generate a balanced differential signal on the transmission line. The receiver section then detects and converts the incoming differential signals back into digital logic levels.

The differential signaling technique provides several advantages, including noise immunity, common-mode noise rejection, and increased noise margin. These features make the DS26C31TM well-suited for reliable data transmission over long distances.

Detailed Application Field Plans

The DS26C31TM finds application in various fields where reliable and high-speed communication is required. Some notable application areas include:

1. Industrial Automation: Used in industrial control systems to transmit data between sensors, actuators, and controllers over long distances.
2. Telecommunications: Employed in telecommunication networks for transmitting data between network equipment, such as routers and switches.
3. Automotive Electronics: Integrated into automotive systems for communication between different electronic modules, such as engine control units and dashboard displays.
4. Medical Devices