DS8921N

Product Overview

• Category: Integrated Circuit
• Use: Differential Line Driver and Receiver
• Characteristics:
  • High-speed data transmission
  • Low power consumption
  • Wide operating voltage range
  • Robust ESD protection
• Package: DIP (Dual In-line Package)
• Essence: DS8921N is a versatile integrated circuit used for differential line driving and receiving applications.
• Packaging/Quantity: Available in tubes or reels, with quantities varying based on customer requirements.

Specifications

• Supply Voltage Range: +4.5V to +5.5V
• Operating Temperature Range: -40°C to +85°C
• Data Rate: Up to 10 Mbps
• Input Common Mode Voltage Range: -7V to +12V
• Output Voltage Swing: ±3.5V
• Propagation Delay: 20 ns (typical)

Detailed Pin Configuration

The DS8921N package consists of 16 pins, each serving a specific function:

1. VCC - Positive supply voltage
2. GND - Ground reference
3. RO+ - Non-inverting receiver output
4. RO- - Inverting receiver output
5. DE - Driver enable input
6. DI- - Inverting driver input
7. DI+ - Non-inverting driver input
8. RE - Receiver enable input
9. VBB - Bias voltage for receiver inputs
10. NC - No connection
11. NC - No connection
12. NC - No connection
13. NC - No connection
14. NC - No connection
15. NC - No connection
16. NC - No connection

Functional Features

• Differential Line Driving: The DS8921N provides high-speed differential line driving capability, ensuring reliable data transmission over long distances.
• Differential Line Receiving: It also includes a differential receiver section that can accurately detect and interpret incoming differential signals.
• Driver and Receiver Enable Control: The enable inputs (DE and RE) allow the user to control the driver and receiver sections independently, conserving power when not in use.
• ESD Protection: The DS8921N incorporates robust electrostatic discharge (ESD) protection, safeguarding the integrated circuit from potential damage during handling or operation.

Advantages and Disadvantages

Advantages: - High-speed data transmission capability - Wide operating voltage range allows for compatibility with various systems - Low power consumption for energy-efficient applications - Robust ESD protection ensures reliability in harsh environments

Disadvantages: - Limited data rate compared to some newer ICs in the market - DIP package may not be suitable for space-constrained designs

Working Principles

The DS8921N operates based on differential signaling principles. It uses complementary driver outputs to generate a balanced differential signal, which improves noise immunity and reduces common-mode interference. The receiver section then detects and amplifies the differential signal, recovering the original data.

Detailed Application Field Plans

The DS8921N finds applications in various fields, including:

1. Industrial Automation: Used for reliable communication between industrial control systems and sensors/actuators over long distances.
2. Telecommunications: Enables high-speed data transmission in telecommunication networks, ensuring accurate signal reception.
3. Automotive Electronics: Utilized in automotive systems for robust communication between electronic control units (ECUs) and sensors/actuators.
4. Medical Equipment: Facilitates secure data transfer in medical devices, maintaining the integrity of critical patient information.

Detailed and Complete Alternative Models

1. SN75176 - Differential Bus Transceiver
2. MAX485 - Low-Power RS-485/RS-422 Transceiver
3. LTC2875 - Quad ±60V Fault-Protected RS485 Transceiver
4. ADM2587E - Isolated RS-485 Transceiver with Integrated Transformer Driver

These alternative models offer similar functionality to the DS8921N and can be considered based on specific application requirements.

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