DS8921AMX/NOPB

Product Overview

• Category: Integrated Circuit
• Use: Differential Line Driver and Receiver
• Characteristics: High-speed, Low-power, Differential Signaling
• Package: Surface Mount
• Essence: Transmitting and Receiving Differential Signals
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Data Rate: Up to 10 Mbps
• Propagation Delay: 20 ns (typical)
• Output Current: ±60 mA
• Input Thresholds: ±200 mV
• Input Hysteresis: 50 mV
• Power Dissipation: 100 mW (typical)

Pin Configuration

The DS8921AMX/NOPB package consists of 8 pins:

1. VCC - Power Supply
2. GND - Ground
3. RO - Receiver Output
4. RE - Receiver Enable
5. DE - Driver Enable
6. DI - Driver Input
7. VBB - Bias Voltage
8. DO - Driver Output

Functional Features

• Differential signaling for noise immunity
• Compliant with EIA/TIA-422-B and ITU-T V.11 standards
• Wide supply voltage range for flexibility
• Low power consumption for energy efficiency
• High-speed data transmission up to 10 Mbps
• Receiver input hysteresis for noise rejection
• Driver output current limiting for protection

Advantages

• Robust differential signaling ensures reliable data transmission in noisy environments.
• Wide supply voltage range allows compatibility with various systems.
• Low power consumption reduces energy costs and extends battery life.
• High-speed data transmission enables quick and efficient communication.
• Input hysteresis enhances noise immunity, improving signal integrity.
• Output current limiting protects the driver from excessive loads.

Disadvantages

• Limited data rate compared to newer high-speed communication standards.
• Requires additional external components for complete system implementation.
• Sensitivity to voltage fluctuations may affect performance in unstable power conditions.

Working Principles

The DS8921AMX/NOPB is designed to transmit and receive differential signals. It operates by converting single-ended input signals into differential signals using a driver circuit. The differential signals are then transmitted through a balanced transmission line, which provides noise immunity and reduces electromagnetic interference. On the receiving end, the differential signals are converted back into single-ended signals using a receiver circuit.

Detailed Application Field Plans

The DS8921AMX/NOPB is commonly used in various applications that require reliable and high-speed data transmission. Some of its typical application fields include:

1. Industrial Automation: Used in PLCs (Programmable Logic Controllers) and industrial control systems for communication between sensors, actuators, and controllers.
2. Telecommunications: Employed in telecom equipment such as modems, routers, and multiplexers for transmitting data over long distances.
3. Automotive Electronics: Integrated into automotive systems for communication between different electronic modules, such as engine control units and infotainment systems.
4. Medical Devices: Utilized in medical equipment like patient monitoring systems and diagnostic devices for transmitting vital data accurately and securely.
5. Data Communication: Found in networking equipment, such as switches and hubs, to ensure reliable data transmission between network nodes.

Detailed and Complete Alternative Models

1. SN75176B - Differential Bus Transceiver
2. MAX485 - Low-Power RS-485/RS-422 Transceiver
3. LTC2862 - ±60V Fault-Protected RS485 Transceiver
4. ADM2587E - Isolated RS-485 Transceiver with Integrated Transformer Driver
5. SP3485 - Half-Duplex RS-485 Transceiver

These alternative models offer similar functionality and can be considered as substitutes for the DS8921AMX/NOPB in various applications.

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