SN75C185N

Product Overview

Category

SN75C185N belongs to the category of integrated circuits (ICs).

Use

This product is commonly used as a line driver and receiver for RS-485 communication systems.

Characteristics

• High-speed data transmission capability
• Low power consumption
• Wide operating voltage range
• Robustness against noise and interference

Package

SN75C185N is available in a 8-pin DIP (Dual Inline Package) or SOIC (Small Outline Integrated Circuit) package.

Essence

The essence of SN75C185N lies in its ability to transmit and receive data reliably over long distances in RS-485 communication networks.

Packaging/Quantity

SN75C185N is typically sold in reels or tubes, with each reel or tube containing a specific quantity of ICs. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Supply Voltage: 4.75V to 5.25V
• Data Rate: Up to 20 Mbps
• Operating Temperature Range: -40°C to +85°C
• Number of Pins: 8
• Input/Output Type: Differential

Detailed Pin Configuration

1. A (Non-Inverting Driver Output)
2. B (Inverting Driver Output)
3. GND (Ground)
4. Y (Receiver Output)
5. Z (Receiver Output)
6. VCC (Supply Voltage)
7. B (Inverting Driver Input)
8. A (Non-Inverting Driver Input)

Functional Features

• High-speed differential line driver and receiver
• Allows bidirectional data transmission
• Supports half-duplex communication
• Provides fail-safe receiver inputs
• Enables multi-point bus configurations

Advantages

• Reliable data transmission over long distances
• Low power consumption
• Wide operating voltage range allows flexibility in various applications
• Robustness against noise and interference ensures data integrity

Disadvantages

• Limited to half-duplex communication
• Requires external components for complete RS-485 network implementation
• May not be suitable for applications requiring higher data rates

Working Principles

SN75C185N operates based on the principles of differential signaling. It uses a balanced transmission line to transmit data, which helps in reducing the effects of noise and interference. The driver section amplifies the digital signals, while the receiver section detects and converts the received signals back into digital form.

Detailed Application Field Plans

SN75C185N finds applications in various fields, including:

1. Industrial Automation: Used for communication between PLCs (Programmable Logic Controllers), sensors, and actuators in industrial control systems.
2. Building Automation: Enables communication between different building automation devices, such as HVAC (Heating, Ventilation, and Air Conditioning) systems, lighting controls, and access control systems.
3. Security Systems: Facilitates data exchange between security devices like cameras, access control panels, and alarm systems.
4. Automotive Electronics: Utilized for communication between different automotive modules, such as engine control units, body control modules, and infotainment systems.

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to SN75C185N are:

1. MAX485 - Manufactured by Maxim Integrated
2. LTC485 - Manufactured by Linear Technology
3. SP3485 - Manufactured by Exar Corporation
4. ADM485 - Manufactured by Analog Devices

These alternative models offer similar functionality and are widely used in RS-485 communication systems.

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