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RS485 Transceiver IC Component – Computer, Electronic and Optical Product Manufacturing

Component Specifications

Definition

An RS485 Transceiver IC is an integrated circuit that converts logic-level signals from a microcontroller or processor into differential voltage signals for transmission over RS485 communication lines, and vice versa for reception. It provides electrical isolation, noise rejection through balanced differential signaling, and supports half-duplex or full-duplex communication with multiple nodes on a single bus, making it essential for industrial automation, building control, and instrumentation networks.

Working Principle

The IC operates by transmitting data as a differential voltage pair (A and B lines) where the signal is represented by the voltage difference between the two lines. This differential method cancels out common-mode noise. In transmit mode, it converts single-ended logic signals to differential outputs; in receive mode, it converts differential inputs to logic-level outputs, often with fail-safe biasing to ensure a known state when the bus is idle.

Materials

Silicon semiconductor die with CMOS or BiCMOS technology, packaged in SOIC, TSSOP, or QFN with lead-free plating (e.g., SnAgCu), operating temperature range typically -40°C to +85°C or -40°C to +125°C for industrial grades.

Technical Parameters

Data Rate Up to 20 Mbps
ESD Protection ±15kV HBM
Supply Voltage 3.3V or 5V
Operating Temperature -40°C to +85°C
Common-Mode Voltage Range -7V to +12V
Number of Drivers/Receivers 1/1 or 2/2

Standards

ISO 8482, TIA/EIA-485-A, DIN 66259

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for RS485 Transceiver IC.

Parent Products

This component is used in the following industrial products

RS485 Communication Module

A hardware module that implements the RS485 serial communication standard for industrial data transmission.

View Product Details

Engineering Analysis

Risks & Mitigation

Signal integrity loss due to improper termination or cable length
ESD damage from handling or environmental exposure
Bus contention in multi-drop setups without proper protocol management

FMEA Triads

Trigger: Incorrect termination resistor values
Failure: Signal reflections and data corruption
Mitigation: Use 120Ω resistors at both ends of the bus and match cable impedance.

Trigger: Excessive common-mode voltage beyond IC rating
Failure: IC damage or communication failure
Mitigation: Implement isolation or use ICs with wider common-mode range.

Trigger: Ground loops in distributed systems
Failure: Noise injection and signal errors
Mitigation: Use isolated transceivers or ensure single-point grounding.

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

±0.1% for termination resistors, ±5% for supply voltage

Test Method

Eye diagram analysis for signal integrity, ESD testing per IEC 61000-4-2, and bus loading tests per TIA/EIA-485-A.

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation

4/5

Manufacturing capability

4/5

Inspection readiness

5/5

Supplier transparency

3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

Related Components

Memory Module

Memory module for Industrial IoT Gateway data storage and processing

Storage Module

Industrial-grade storage module for data logging and firmware in IoT gateways

Ethernet Controller

Industrial Ethernet controller for real-time data transmission in Industrial IoT Gateways.

Serial Interface

Serial interface for industrial data transmission between IoT gateways and legacy equipment using RS-232/422/485 protocols.

Frequently Asked Questions

What is the difference between RS485 and RS232 transceivers?

RS485 uses differential signaling for noise immunity and supports multi-drop networks over longer distances (up to 1200 meters), while RS232 uses single-ended signaling for point-to-point communication with shorter range and less noise resistance.

Can RS485 Transceiver ICs be used in half-duplex and full-duplex modes?

Yes, some ICs support both modes: half-duplex uses a single pair for bidirectional communication, while full-duplex uses separate pairs for transmitting and receiving, requiring two pairs of lines.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

RS485 Transceiver IC