DS1487N/NOPB

Product Overview

• Category: Integrated Circuit
• Use: RS-485/RS-422 Transceiver
• Characteristics: High-speed, low-power, half-duplex communication
• Package: PDIP-8, SOIC-8
• Essence: Transceiver IC for industrial communication
• Packaging/Quantity: Tube/50 units, Tape & Reel/2500 units

Specifications

• Supply Voltage: 4.75V to 5.25V
• Data Rate: Up to 10 Mbps
• Operating Temperature Range: -40°C to +85°C
• Number of Drivers/Receivers: 1/1
• Driver Output Current: ±60 mA
• Receiver Input Sensitivity: ±200 mV
• Propagation Delay: 30 ns (typical)
• Shutdown Mode: Yes

Pin Configuration

The DS1487N/NOPB has an 8-pin package with the following pin configuration:

```

---

| | --| VCC GND |-- Pin 1: Supply Voltage (VCC) --| RO RE |-- Pin 2: Receiver Output (RO) --| DI DE |-- Pin 3: Driver Input (DI) --| DE /RE |-- Pin 4: Driver Enable (DE) and Receiver Enable (/RE) --| B A |-- Pin 5: Differential Data Inputs (A, B) --| Y Z |-- Pin 6: Differential Data Outputs (Y, Z) --| GND VCC |-- Pin 7: Ground (GND) |___________| ```

Functional Features

• Supports RS-485 and RS-422 standards
• Half-duplex communication
• Low power consumption
• High-speed data transmission
• Built-in driver and receiver circuitry
• Receiver input sensitivity allows for long cable lengths
• Driver output current enables reliable communication over long distances
• Shutdown mode for power-saving

Advantages and Disadvantages

Advantages: - Supports industrial communication standards - Robust and reliable performance - Suitable for long-distance communication - Low power consumption - Easy to integrate into existing systems

Disadvantages: - Limited to half-duplex communication - Requires external components for full functionality - Not suitable for high-speed or full-duplex applications

Working Principles

The DS1487N/NOPB is a transceiver IC designed for RS-485/RS-422 communication. It operates in a half-duplex mode, allowing bidirectional data transmission on a single pair of differential lines. The driver circuitry converts the logic-level signals into balanced differential voltages, while the receiver circuitry converts the received differential signals back into logic-level signals.

The transceiver supports high-speed data rates up to 10 Mbps and can operate over a wide temperature range. It features a shutdown mode that reduces power consumption when not in use. The DS1487N/NOPB is commonly used in industrial automation, process control, and other applications requiring reliable long-distance communication.

Detailed Application Field Plans

The DS1487N/NOPB is widely used in various industrial applications, including:

1. Industrial Automation Systems: Used for communication between PLCs (Programmable Logic Controllers), sensors, and actuators in manufacturing plants.
2. Process Control: Enables communication between control systems and field devices such as valves, pumps, and motors.
3. Building Automation: Facilitates communication between different building management systems, including HVAC, lighting, and security systems.
4. Energy Management: Used in smart grid systems for monitoring and controlling power distribution.
5. Transportation Systems: Enables communication between control units, sensors, and actuators in automotive, railway, and aviation applications.

Detailed and Complete Alternative Models

• MAX485
• SN75176
• LTC485
• ADM485
• SP3485

These alternative models offer similar functionality and can be used as replacements for the DS1487N/NOPB in various applications.

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