TDP20MB421RUAR

Overview

The TDP20MB421RUAR 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 per lane, accommodating RBR, HBRx, and UHBRx modes. The device operates on a single 3.3V supply with active power consumption of 720mW for all channels. Key electrical parameters include a propagation delay of 90ps, additive random jitter of 70fs at 20Gbps, and 19dB equalization boost. It features SMBus/I2C interface support with a maximum clock frequency of 400kHz and operates within a temperature range of -40°C to 85°C.

Feature Summary

• Integrates a 2:1 multiplexer to select between two source ports for four independent signal channels.
• Employs continuous time linear equalizers (CTLE) to compensate for inter-symbol interference in lossy PCB traces.
• Supports configuration via strap pins or SMBus/I2C secondary mode for flexible system integration.
• Maintains transparency to DisplayPort and HDMI link training protocols while preserving transmit preset characteristics.

Applications

• Desktop PC and motherboard display interfaces
• PC, notebooks, and tablets video output
• Docking stations and expansion hubs
• TV, gaming consoles, and home theater systems

Procurement Notes

Verify the specific suffix RUAR against the manufacturer's official datasheet to confirm package dimensions and tape-and-reel specifications. Ensure the ordering code matches the required operating temperature range and pin configuration. Cross-reference the component marking with the production revision history to guarantee authenticity and traceability.

Selection Notes

Select this component when designing high-speed digital video links requiring signal integrity restoration over long PCB traces. The integrated 2:1 MUX simplifies source switching architectures without additional external logic. Consider the low latency and protocol transparency for maintaining synchronization in DisplayPort 2.1 and HDMI 2.1 environments.

Part Context

This device belongs to the TDP20MB421 family of linear redrivers from Texas Instruments. It is specifically engineered for next-generation display interfaces, offering higher bandwidth capabilities compared to previous generation repeaters. The WQFN-42 package provides a compact footprint suitable for space-constrained consumer electronics and industrial displays.

Replacement Considerations

Direct replacements must match the 42-pin WQFN package and support 20Gbps data rates. Verify compatibility with existing I2C addresses and strap pin configurations if migrating from older redriver models. Ensure the substitute component supports the same AC-coupled HDMI 2.1 and DisplayPort 2.1 standards.