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LT87101CD

1. Description

LT87101CD is a signal re-driver with Type-C input and DP or USB3.1 output. DP or USB3.1 signal quality is deeply-optimized and enhanced by performing cable or board trace loss compensation. The device complies with VESA DP1.2 and USB3.1 Gen-1 specifications. It supports 4-lane DP main link interface or 2-lane DP main link plus a USB3.1 Gen-1 interface.
The input receiver of LT87101CD features a multi-level programmable linear equalizer, supporting up to 25dB loss compensation due to Inter-Symbol Interference (ISI). The output transmitter re-drives the received signal with multi-level programmable output swing and up to 6dB de-emphasis. A build-in AUX interception block monitors AUX channel and automatically adjust equalizers and signaling levels in response to DP Link Training Commands. A Low-Frequency Periodic Signal (LFPS) detection, automatic plug and unplug by remote receiver termination sensing and state machine is also integrated for USB3.1 Gen-1 data transfer.
Type-C operating is controlled by CC detect, CC logic and PD management unit. A high performance passive differential switch is also integrated to realize data channel exchange according to Type-C interface insert orientation. This relieves BOM cost and mobile system design complexity. The switch function is compliant with VESA DP Alternate Mode standard and support Pin Assignment C or D in different applications.
The chip internally integrates an 8-bit OCM and flash memory (stacked die) to configure and run program. Online software upgrade is also supported.
The LT87101CD is fabricated in advanced CMOS process and implemented in a small outline 5mmx5mm QFN40 package. This package is RoHS compliant and specified to operate from -40°C to +85°C.

2. Features

? Compliant to VESA DP1.2, USB3.1 Gen-1, Type-C r1.2, USB PD2.0 and DP Alt Mode v1.0 Standards
? Support either Pin Assignment C or D
? Support Hot-Plug Detect for DP Output Interface
? Integrate AUX Interception
? Programmable Input Equalization
? Programmable Output Swing and De-emphasis
? USB Full-Featured, Orientation and Role Detection
? 2 Power Roles Supported: Source and Sink
? 2 Data Roles Supported: UFP and DRP
? 3-level Current Ability Detection for Type-C Power: USB Default, 1.5A@5V, 3A@5V
? SBU Data Path Control for DP Alt Mode
? Internal MCU and Flash for Online Firmware Upgrade
? Support External I2C Debug
? 1.8V/3.3V Power Supply
? Packaged in 5mmx5mm QFN40

3. Applications

? Smartphone, Tablet and Other Mobile Devices
? VR/AR Eco-System and Home Entertainment
? PC, Notebook, All-in-Ones Computer and Docking

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