Line Receiver Component for PHY Interfaces

Product Specifications

Technical details and manufacturing context for Line Receiver

Definition

The Line Receiver is a critical component within the Physical Interface (PHY) layer of communication systems. Its primary role is to accept differential or single-ended electrical signals transmitted over a communication line (e.g., RS-422, RS-485, Ethernet), condition them by amplifying, filtering, and compensating for signal degradation (attenuation, noise, distortion), and convert them into clean digital logic levels suitable for processing by the data link layer circuitry. This component is used in industrial automation, networking equipment, and data acquisition systems where reliable data transmission over long distances or in electrically noisy environments is required. The line receiver typically operates by using a differential amplifier configuration to sense the voltage difference between two input lines. This design provides high common-mode noise rejection, crucial for reliable data transmission in electrically noisy environments. It compares the received signal against a reference threshold, regenerates the digital waveform, and outputs corresponding logic high or low states. Advanced receivers may include features like hysteresis (Schmitt-trigger inputs) to prevent oscillation at threshold crossings, built-in termination, and fail-safe biasing to ensure a known logic state when inputs are open or shorted. When selecting a line receiver, engineers must consider parameters such as supply voltage (3.3–5 V), data rate (10–100 Mbps), input common-mode voltage range (-7–12 V), input sensitivity (±200 mV), propagation delay (10–30 ns), output voltage swing (0–3.3 V), operating temperature range (-40–85 °C), ESD protection (±8 kV per IEC 61000-4-2), package type (SOIC-8), number of channels (1–4), input impedance (12–15 kΩ), and power consumption (10–50 mW). These values are typical ranges and must be verified against the specific model's datasheet. The line receiver is a passive component in the sense that it does not generate data but faithfully reproduces the transmitted signal. It is not a standalone product but is integrated into larger systems. For procurement, verify the exact electrical specifications, package, and compliance with relevant standards with the legal manufacturer or supplier.

Working Principle

The line receiver typically operates by using a differential amplifier configuration to sense the voltage difference between two input lines. This design provides high common-mode noise rejection, crucial for reliable data transmission in electrically noisy environments. It compares the received signal against a reference threshold, regenerates the digital waveform, and outputs corresponding logic high or low states. Advanced receivers may include features like hysteresis (Schmitt-trigger inputs) to prevent oscillation at threshold crossings, built-in termination, and fail-safe biasing to ensure a known logic state when inputs are open or shorted.

Common Materials

Silicon (for integrated circuit die), Copper (for lead frames/pins), Epoxy molding compound (for package), Gold (for bonding wires)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Supply Voltage	3.3–5 V	Operating range for logic and line driver
Data Rate	10–100 Mbps	Maximum data throughput
Input Common-Mode Voltage Range	-7–12 V	Wider range improves noise immunity
Input Sensitivity	±200 mV	Minimum differential signal for correct output
Propagation Delay	10–30 ns	Affects timing margin in high-speed systems
Output Voltage Swing	0–3.3 V	Compatible with TTL/CMOS logic levels
Operating Temperature Range	-40–85 °C	Industrial grade; wider range available
ESD Protection	±8 kV	HBM model; protects against static dischargeIEC 61000-4-2
Package Type	SOIC-8	Common surface-mount package
Number of Channels	1–4	Single or multiple receivers per package
Input Impedance	12–15 kΩ	Termination for transmission line
Power Consumption	10–50 mW	At maximum data rate

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Differential Amplifier
Amplifies the voltage difference between the two signal input lines while rejecting common-mode noise.

Material: silicon (transistors)
Input Protection Network Part
Protects the sensitive amplifier inputs from electrostatic discharge (ESD) and voltage transients on the communication line.

Material: silicon (diodes)
Output Driver/Buffer
Converts the amplified differential signal into standard digital logic levels (e.g., TTL, CMOS) and drives the internal data bus.

Material: silicon (transistors)
Bias/Reference Circuit Part
Generates stable internal reference voltages for input threshold detection and fail-safe operation.

Material: silicon (resistors, bandgap reference)

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Physical Interface (PHY)

View system integration details

Manufacturers of Line Receiver

Manufacturer profiles associated with Line Receiver.

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Frequently Asked Questions

What is the primary function of a line receiver?

A line receiver is a component in the physical layer (PHY) of communication systems. It receives electrical signals from a transmission line (e.g., RS-422, RS-485, Ethernet) and converts them into digital logic levels that can be processed by the data link layer. It conditions the signal by amplifying, filtering, and compensating for degradation.

What are typical supply voltage and data rate ranges?

Typical supply voltage ranges from 3.3 V to 5 V, and data rates from 10 to 100 Mbps. These are reference ranges; actual values depend on the specific model and must be verified with the manufacturer's datasheet.

How does a line receiver handle noise?

Line receivers use differential amplifier configurations to sense the voltage difference between two input lines, providing high common-mode noise rejection. This helps maintain signal integrity in electrically noisy environments. Some receivers also include hysteresis to prevent oscillation at threshold crossings.

What should I verify before purchasing a line receiver?

Verify the exact electrical parameters such as supply voltage, data rate, input common-mode voltage range, input sensitivity, propagation delay, output voltage swing, operating temperature range, ESD protection rating, package type, number of channels, input impedance, and power consumption. Also confirm compliance with relevant standards like IEC 61000-4-2 for ESD. Always check the datasheet and consult the legal manufacturer or supplier.

Data Basis

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Preliminary Technical Classification

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pressure:	Not applicable (electronic component)
other spec:	Data Rate: 10 Mbps to 10 Gbps, Supply Voltage: 3.3V ±10%, Input Signal Range: ±0.2V to ±2V differential
temperature:	-40°C to +85°C (industrial grade), -40°C to +125°C (extended)

Line Receiver

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards