TDP20MB421RUAT

Overview

The TDP20MB421RUAT is a four-channel linear redriver with an integrated 2:1 multiplexer designed for DisplayPort 2.1 and AC-coupled HDMI 2.1 interfaces. It supports data rates up to 20Gbps per lane (UHBR20) and 24Gbps protocol-agnostic operation. The device operates on a single 3.3V supply, consuming 720mW in active mode. Key electrical parameters include a propagation delay of 90ps, 19dB equalization boost at 10GHz, and -60dB near-end crosstalk. It features continuous time linear equalizers (CTLE), configurable via pin straps or SMBus/I2C, and operates within a temperature range of -40°C to 85°C.

Feature Summary

• Integrates a 2:1 multiplexer to select between two source inputs for four independent channels.
• Employs continuous time linear equalizers (CTLE) to compensate for signal loss in PCB traces.
• Supports transparent link training for DisplayPort 1.4, 2.1, and HDMI 2.1 protocols.
• Configurable via strap pins or SMBus/I2C interface for flexible system integration.

Applications

• Desktop PC and motherboard video interfaces
• Docking stations and expansion hubs
• Flat panel monitors and TV displays
• Professional audio, video, and signage systems

Procurement Notes

Verify the specific ordering suffix RUAT corresponds to the WQFN-42 package and reel packaging configuration required for your assembly process. Confirm that the component meets RoHS compliance standards applicable to your region. Ensure the design accommodates the specified thermal dissipation requirements for the exposed pad ground connection.

Selection Notes

Select this component when designing high-speed digital visual interfaces requiring signal integrity restoration over lossy transmission media. The integrated 2:1 MUX simplifies switching logic compared to separate mux and redriver solutions. Verify that the host controller can support the required I2C addressing scheme if dynamic configuration is needed rather than static pin strapping.

Part Context

This part belongs to Texas Instruments' TDP20MB421 family of linear redrivers. It is specifically engineered for next-generation display interfaces, offering higher bandwidth capabilities than previous generations. The device addresses the increasing signal attenuation challenges associated with UHBR data rates in modern computing and entertainment hardware.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's official replacement guide or contact technical support directly for validated cross-reference information before modifying existing designs.