Interface - Signal Terminators

Image Part Number Description / PDF Quantity Rfq
DS2108S

DS2108S

Maxim Integrated

IC TERM SCSI DIFF/SWITCH 24-SOIC

0

DS2105Z+

DS2105Z+

Maxim Integrated

IC SCSI TERMINATOR 16-SOIC

0

DS2118MB+T&R

DS2118MB+T&R

Maxim Integrated

IC TERM SCSI LVD/SE ULT-3 36SSOP

0

DS2119M

DS2119M

Maxim Integrated

IC TERM SCSI LVD/SE ULT3 28TSSOP

0

DS2106S/T&R

DS2106S/T&R

Maxim Integrated

IC TERMINATOR SCSI 28-SOIC

0

DS21T07E+

DS21T07E+

Maxim Integrated

IC TERMINATOR SCSI 20-TSSOP

0

DS2117MB/T&R

DS2117MB/T&R

Maxim Integrated

IC TERM SCSI LVD/SE ULT-3 36SSOP

0

DS21T09S

DS21T09S

Maxim Integrated

IC TERM PLUG/PLAY SCSI 28-SOIC

0

DS21T05S

DS21T05S

Maxim Integrated

IC TERMINATOR SCSI 300MIL 16SOIC

0

DS21T07S/T&R

DS21T07S/T&R

Maxim Integrated

IC TERMINATOR SCSI 16-SOIC

0

DS21T05Z/T&R

DS21T05Z/T&R

Maxim Integrated

IC TERMINATOR SCSI 150MIL 16SOIC

0

DS21S07AS/T&R

DS21S07AS/T&R

Maxim Integrated

IC TERMINATOR SCSI 16-SOIC

0

MAX13174ECAG+

MAX13174ECAG+

Maxim Integrated

IC CBL TERMINATION NETWRK 24SSOP

0

DS2117MX/T&R

DS2117MX/T&R

Maxim Integrated

IC TERM SCSI LVD/SE ULT-3 FCHIP

0

DS2125+T&R

DS2125+T&R

Maxim Integrated

IC TERM SCSI ULT3 LVD/SE 48-LQFP

0

DS2119ME+

DS2119ME+

Maxim Integrated

IC TERM SCSI LVD/SE ULT3 28TSSOP

0

DS21S07AS+T&R

DS21S07AS+T&R

Maxim Integrated

IC TERMINATOR SCSI 16-SOIC

0

DS21T09S+

DS21T09S+

Maxim Integrated

IC TERM PLUG/PLAY SCSI 28-SOIC

0

DS21S07AS

DS21S07AS

Maxim Integrated

IC TERMINATOR SCSI 16-SOIC

0

DS2114Z

DS2114Z

Maxim Integrated

IC TERM SCSI 2% 150MIL 16-SOIC

0

Interface - Signal Terminators

1. Overview

Signal terminators are specialized integrated circuits designed to match impedances and suppress signal reflections in high-speed transmission lines. They play a critical role in maintaining signal integrity by ensuring that voltage and current signals propagate without distortion. These devices are essential in modern electronics, particularly in applications requiring high-frequency data transmission, such as telecommunications, computing, and industrial automation.

2. Main Types and Functional Classification

Type Functional Characteristics Application Examples
Resistive Terminators Fixed or adjustable resistors to match transmission line impedance DDR memory interfaces, RS-485 buses
Capacitive Terminators Block DC signals while allowing AC signals to pass High-speed ADC/DAC interfaces
Active Terminators Dynamic impedance adjustment with voltage regulation Fiber optic communication systems
Differential Terminators Balanced termination for differential signaling Ethernet (10GBASE-T), USB 3.0

3. Structure and Composition

Signal terminators typically consist of: - Precision resistors/capacitors embedded in silicon or ceramic substrates. - Package housing (e.g., SMT, TSSOP) with thermal dissipation features. - Internal ESD protection layers to prevent voltage spikes. - Multi-layer metallization for high-frequency signal routing.

4. Key Technical Specifications

Parameter Description
Termination Resistance ( ) Matches transmission line impedance (e.g., 50 , 75 , 100 ).
Frequency Range (GHz) Determines suitability for high-speed applications (e.g., 0.1-10 GHz).
Power Handling (W) Maximum power dissipation without thermal degradation.
Capacitance (pF) Affects signal rise/fall time in capacitive terminators.
Impedance Tolerance (%) Accuracy of impedance matching (e.g., 2%, 5%).

5. Application Fields

  • Telecommunications: 5G base stations, optical transceivers.
  • Computing: Motherboard PCIe interfaces, GPU memory buses.
  • Industrial: PLCs, motor drive signal lines.
  • Automotive: CAN FD bus systems, ADAS sensors.

Case Study: In 10GBASE-T Ethernet, differential terminators ensure 100 impedance matching to reduce crosstalk and bit error rates.

6. Leading Manufacturers and Products

Manufacturer Representative Product Key Features
TI (Texas Instruments) SN75LBC176 RS-485 line driver with integrated termination
Analog Devices ADN4661 Low-power LVDS signal terminator
Infineon Technologies TLE5012B Automotive CAN FD controller with termination
STMicroelectronics TS922 Rail-to-rail op-amp for active termination circuits

7. Selection Guidelines

Key considerations: 1. Impedance match: Align with transmission line characteristics. 2. Frequency compatibility: Ensure specifications exceed system requirements. 3. Environmental factors: Temperature range, vibration resistance. 4. Package size: Prioritize SMT for high-density PCBs.
Case Study: For aerospace applications, select terminators with 2% impedance tolerance and -55 C to +125 C operating range.

8. Industry Trends

  • Development of terahertz-range terminators for 6G networks.
  • Integration with AI-driven impedance tuning in active terminators.
  • Adoption of nanomaterial-based substrates for improved thermal management.
  • Growth in automotive Ethernet terminators due to vehicle electrification.
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