Equalizers Integrated Circuit
An Equalizer (EQ) IC is a specialized chip designed to “repair” signal integrity.
As high-speed electronic signals travel through cables (HDMI, Ethernet) or Printed Circuit Boards (PCBs), they suffer from physical degradation and loss. Equalizer chips act as a compensatory mechanism, boosting and restoring these blurred, attenuated signals to their clear, original state.
IC-Mart Your Trusted Source for Equalizers Chips
(from leading manufacturers)
Global Mainstream Manufacturers
1. Texas Instruments (TI)
| Part Number | Type | Typical Application / Data Rate |
| LMH1219 | UHD Video Equalizer | 12G-SDI (4K Video), Integrated Reclocker |
| DS125BR800 | Linear Redriver | 12.5Gbps, Multi-protocol (PCIe/SAS/SATA) |
| SN65LVPE502 | Interface Redriver | USB 3.0 (5Gbps) Signal Compensation |
| LMH0394 | Video Equalizer | 3G-SDI (1080p), Ultra Long-haul Cable |
| DS280BR810 | 28Gbps Redriver | 25G/28G Ethernet & Backplane |
2. Analog Devices (ADI – incl. Maxim Integrated)
| Part Number | Type | Typical Application / Data Rate |
| MAX3800 | Adaptive Equalizer | 3.2Gbps, Cable & Backplane |
| MAX3984 | Pre-emphasis/Equalizer | 1Gbps – 10Gbps Signal Recovery |
| ADN2860 | Linear Equalizer | 3.1Gbps, Optical or Mid-speed Data |
| MAX3815 | HDMI Equalizer | DVI/HDMI Cable Extension |
| ADN2530 | Driver/Equalizer | Laser Driver Front-end Compensation |
3. Semtech
| Part Number | Type | Typical Application / Data Rate |
| GS12241 | Cable Equalizer | 12G-SDI, High-performance UHD Video |
| GS2974A | Cable Equalizer | 3G-SDI (SMPTE 424M Standard) |
| GS3441 | Dual Output Equalizer | 3G-SDI, Signal Redundancy |
| GS6151 | UHD Reclocker | 6G-SDI Link Optimization |
4. Diodes Incorporated (incl. Pericom)
| Part Number | Type | Typical Application / Data Rate |
| PI3EQX32904Q | Linear Redriver | 32Gbps, PCIe 5.0 & Automotive ADAS |
| PI3EQX1004 | USB Redriver | USB 3.1 Gen 2 (10Gbps) |
| PI3EQX25904 | 4-Channel Redriver | 25Gbps, Enterprise Servers & Storage |
| PI2EQX4402 | General Purpose EQ | 4.25Gbps, Fibre Channel |
5. Mini-Circuits (RF Equalizers)
| Part Number | Type | Typical Frequency / Features |
| EQY-6-24+ | Fixed Slope Equalizer | DC – 20 GHz, 6dB Compensation Slope |
| EQY-4-283+ | MMIC Gain Equalizer | DC – 28 GHz, Microwave System Flattening |
| EQY-2-123+ | Absorptive Equalizer | DC – 12 GHz, Excellent VSWR |
6. MACOM
| Part Number | Type | Typical Application / Data Rate |
| M21124 | Video Equalizer | 3G-SDI Low Power |
| M21125 | Adaptive Equalizer | High-speed Backplane Switching |
| M21424 | Video/Data Equalizer | Integrated Loss of Signal (LOS) Detection |
Chinese Domestic Manufacturers
1. Montage Technology — High-Speed Interconnect Leader
Montage is a global leader in memory interfaces. Their Retimer chips feature integrated high-performance equalizers.
- Key Models: M88RT61632 (PCIe 6.x), M88RT51632 (PCIe 5.0).
- Applications: AI Servers, Data Centers.
2. Lontium Semiconductor — Video Interface Specialist
Lontium focuses on HDMI, DisplayPort, and SDI interfaces with robust adaptive EQ technology.
- Key Models: LT8618 (HDMI), LT series SDI Equalizers.
- Applications: Surveillance, Medical Displays, Video Conferencing.
3. Analogix (China-backed) — USB/DP Benchmark
A top-tier provider for USB Type-C and DisplayPort signal conditioning.
- Key Models: ANX7440 (10Gbps Redriver), ANX7411.
- Applications: Laptops, Smartphones, VR/AR.
4. GScoolink — UHD Connectivity
Specializes in 4K/8K video solutions with superior long-distance adaptive EQ.
- Key Models: GSV1015 (HDMI 2.0), GSV5100.
- Applications: Home Theater, Pro-AV Systems.
5. 3Peak — Analog Signal Chain
Expanding from general analog ICs into high-speed signal driving and slope compensation.
- Key Models: TPH/TPA Series High-speed Op-amps.
- Applications: Industrial Automation, Base Stations.
6. Innosilicon — High-performance IP & ASIC
Provides top-tier SerDes EQ technology for HDMI 2.1 and PCIe 5.0.
Cross-Reference: Domestic vs. International
| Application Category | International Benchmark | Domestic Recommended |
| PCIe Retimer | Astera Labs, TI | Montage Technology |
| HDMI Equalizer | TI, ADI | Lontium, GScoolink |
| USB-C Redriver | Diodes, TI | Analogix |
| SDI Cable EQ | Semtech, TI | Lontium |
| RF Gain EQ | Mini-Circuits | Canchin, Walsin |
Equalizers Core Technology & Applications
How It Works: The “Water Pump” Analogy
Imagine water flowing through a long, flexible pipe. Pressure is high at the start but drops significantly after 100 meters due to friction. An Equalizer IC acts as an “Intelligent Booster Pump” at the end of the pipe. It senses the pressure loss and re-pressurizes the flow to its original state.
Technical Principle:
In high-speed transmission, high-frequency signals fade faster than low-frequency ones, causing “Eye Diagram” closure. The EQ chip applies high-frequency compensation to pull back the lost data and “re-open the eye.”
Typical Use Cases
- Broadcast & Pro-Video: Ensures 4K/8K clarity over 100-meter SDI cables in stadiums.
- Data Centers: Maintains zero packet loss for PCIe 5.0 (32Gbps) signals across server backplanes.
- Industrial Vision: Stabilizes high-speed camera data in noisy factory environments.
- Automotive: Secures ADAS camera and radar feeds over long vehicle wire harnesses.
- Consumer Electronics: Enables thin, lightweight VR/AR cables to handle massive bandwidth with ultra-low latency.
The Four Core Categories
| Category | Typical Models | Key Manufacturers |
| Video & Broadcast | LMH1219, GS12241 | TI, Semtech, MACOM, ADI |
| Interface Redrivers | DS125BR800, PI3EQX1004 | TI, Diodes, Microchip, Onsemi |
| General/Backplane | MAX3984, ADN2860 | ADI, Microsemi, Renesas |
| RF/Microwave Gain | EQY-6-24+, VEQ Series | Mini-Circuits, Qorvo, Skyworks |
Logic Hierarchy
- By Medium: Cable-based vs. Board-level (PCB).
- By Protocol: Standard-specific (HDMI/PCIe) vs. General Purpose.
- By Control: Adaptive (Automatic) vs. Fixed (Pre-set).