TDP20MB421IRUAR

Overview

The TDP20MB421IRUAR is a four-channel linear redriver with an integrated 2:1 multiplexer designed for DisplayPort 2.1 and AC-coupled HDMI 2.1 applications. It supports data rates up to 20Gbps for DisplayPort (RBR, HBRx, UHBRx) and 12Gbps for HDMI 2.1 Source, with protocol-agnostic operation up to 24Gbps. 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 SMBus/I2C or pin control configuration and operates within a temperature range of -40°C to 85°C.

Feature Summary

• Four-channel linear redriver with integrated 2:1 MUX supporting DisplayPort 2.1 and AC-coupled HDMI 2.1
• Protocol agnostic continuous time linear equalizer (CTLE) with programmable high-frequency boost
• Configurable via strap pins or SMBus/I2C interface for independent channel control
• Transparent to DisplayPort 1.4, 2.1, and HDMI 2.1 link training protocols

Applications

• Desktop PC and motherboard interconnects
• PC, notebooks, and tablets display interfaces
• Docking stations and hubs
• TV, gaming, home theater, and entertainment systems
• Flat panel monitors and signage

Procurement Notes

Verify the specific suffix IRUAR against the manufacturer's official documentation to confirm the industrial temperature grade (-40°C to 85°C) and packaging details. Ensure that the ordering information matches the exact part number required for your design specifications. Cross-reference the datasheet revision history for any updates regarding availability or functional changes before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring signal integrity extension for DisplayPort 2.1 or HDMI 2.1 links up to 20Gbps. The integrated 2:1 MUX allows flexible source selection between two inputs. Consider the low additive jitter and transparent link training behavior for maintaining compliance with strict display standards. Evaluate the power consumption requirements against the available 3.3V supply rail and thermal dissipation capabilities of the WQFN package.

Part Context

The TDP20MB421 belongs to Texas Instruments' family of high-speed interface redrivers. It is specifically engineered to compensate for insertion loss in PCB traces and cables. The device preserves transmit presets while opening closed eyes caused by inter-symbol interference. It serves as a critical component in modern display architectures where signal degradation over long channels must be mitigated without introducing significant latency.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the verified source material.