Interface – Signal Buffers, Repeaters Integrated Circuit
Interface – Signal Buffers and Repeaters are the “signal gas stations” of electronic systems.
When high-speed digital signals travel through PCBs, cables, or connectors, they weaken. Resistance, capacitance, and high-frequency loss cause signal degradation. These chips receive these “blurry” signals and amplify, repair, or rebuild them. They ensure data reaches its destination accurately.
IC-Mart Your Trusted Source for Interface – Signal Buffers, Repeaters Chips
(from leading manufacturers)
Mainstream Manufacturers
1. Texas Instruments (TI)
Interface Type
Typical Model
Description
I2C / SMBus
P82B715 / TCA9517
I2C Bus Extender / Level-Shifting Repeater
USB
TUSB211 / TUSB551
USB 2.0 Signal Conditioner / USB 3.0 Redriver
PCIe
DS125BR800
8-Channel, 12.5Gbps High-Performance Redriver
MIPI
SN75DPHY440
Mobile D-PHY Retimer
LVDS
DS90LV001
Single-Channel High-Speed Differential Buffer
2. Diodes Incorporated (Including former Pericom)
Interface Type
Typical Model
Description
PCIe
PI2EQX4432 / PT7C8011
PCIe 2.0 Redriver / Clock Buffer
USB
PI3EQX7841 / PI3EQX7502A
USB 3.0 Single/Dual Channel Redriver
DisplayPort
PI2DPX2023
High-Speed Signal Conditioner (DP 2.1)
USB/DP Hybrid
PI3DPX1207
USB 3.1/DP Hybrid Redriver for Type-C
3. NXP Semiconductors
Interface Type
Typical Model
Description
I2C / Fm+
PCA9515A / PCA9617A
Standard I2C Repeater / Fast-mode Plus Buffer
Hot Swap I2C
PCA9511A
I2C Isolation Buffer for Backplane Hot Swapping
HDMI / Video
PCA9507
Buffer for HDMI DDC Bus
USB / eUSB2
PTN3222
eUSB2 to USB 2.0 Signal Conversion Redriver
4. Analog Devices (ADI, Including former Linear Tech)
Interface Type
Typical Model
Description
2-Wire / I2C
LTC4303 / LTC4313
I2C Buffer with Stuck Bus Recovery
Level Shifting
LTC4301
Supply-Independent Buffer for Level Translation
High-Speed Bus
MAX22505
High-Speed USB Port Protection & Signal Enhancement
5. Other Key Suppliers
Renesas (Intersil): Models like ISL33001 / ISL33002. Known for ultra-compact I2C buffers in consumer electronics.
onsemi: Models like FIN1101. Specializes in high-frequency LVDS buffering and repeating.
Microchip: Models like VSC8228. High-end Retimers for 10G/40G Ethernet.
Top Chinese Domestic Manufacturers
1. Logic & General Purpose Buffers
Used for signal amplification, line driving, and isolation in consumer and industrial tech.
Manufacturer
Typical Model
Description
Cross-Reference (Intl)
SGMICRO
74LVC1G17
Single Schmitt-Trigger Buffer
SN74LVC1G17
74LVC540A
Octal Buffer/Line Driver
SN74LVC540A
Run-IC
RS1G125
Single Buffer with 3-State Output
SN74LVC1G125
RS0104
4-Channel Level Translation Buffer
TXS0104 / TXB0104
AnalogySemi
ASLVC1G125
Low-Power Single Buffer
SN74LVC1G125
2. I2C / SMBus / 2-Wire Buffers & Repeaters
Manufacturer
Typical Model
Description
Cross-Reference (Intl)
NOVOSENSE
NCA9511
Hot Swappable I2C Bus Buffer
LTC4311 / PCA9511
NCA9617
Bidirectional I2C Level-Shifting Repeater
PCA9617A
3PEAK
TPT29617A
Dual-Channel I2C Buffer/Repeater
PCA9617
Run-IC
RS29617
High-Performance I2C Repeater
PCA9617
3. High-Speed Redrivers (USB / PCIe)
Manufacturer
Typical Model
Description
Application
Dioo Micro
DIA36812
USB 3.2 Gen1 Dual-Channel Redriver
Infotainment, Long USB
DIA3350
Automotive USB 3.2 Gen2 Redriver Switch
Car Type-C Ports
Montage
M88PR401
PCIe 4.0 Retimer
Servers, Data Centers
Wanxietong
WSTR60A/B
PCIe 4.0 Redriver
SSDs, Add-in Cards
Genesys
GL9905
USB 3.2 Gen2x2 20Gbps Redriver
PC Peripherals, Docks
4. Video & Display Interfaces (HDMI / DP / MIPI)
Manufacturer
Typical Model
Description
Cross-Reference
Lontium
LT86101SX
HDMI 1.4/2.0 Redriver/Repeater
TMDS181
LT9211
MIPI/LVDS/TTL Conversion & Repeating
Multi-Interface
Parade
PS8925/PS8926
PCIe 4.0/5.0 Retimer
Top-tier solutions
Teradyne/Seiko
HDMI Redrivers
4K/8K Video Signal Enhancement
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Interface – Signal Buffers, Repeaters Core Functional Classifications
Type
Processing Method
Analogy
Core Problem Solved
Buffer
Increases drive current, boosts fan-out.
Loudspeaker
Excessive load (one signal driving too many devices).
Repeater
Physical signal amplification.
Baton Race
Signal attenuation over long distances.
Redriver
Frequency compensation (Analog).
Sharpening Filter
Signal “blurring” due to high-frequency loss.
Retimer
CDR (Digital) – full signal reconstruction.
Photocopier
Severe Jitter that analog tools cannot fix.
Typical Use Cases
Data Centers & Servers (PCIe Expansion):CPU signals degrade quickly over long PCB traces to GPUs or NVMe SSDs. PCIe 4.0/5.0 signals drop significantly within 10cm. PCIe Retimers “clean” these signals mid-path.
Consumer Electronics (USB & HDMI Long Cables):Longer cables mean higher impedance. This leads to screen flickering or disconnected devices. Redrivers inside cable connectors provide high-frequency compensation (Equalization).
Industrial Control (I2C/SMBus):Large industrial racks lead to high bus capacitance, causing communication lockups. I2C Buffers divide the bus into smaller, independent segments to maintain signal integrity.
Automotive Electronics (Infotainment):Vehicle cabins are electrically noisy. Automotive Repeaters boost signal-to-noise ratios for delay-free camera and display feeds.
