Texas Instruments SN65DP149RSBT

Overview

SN65DP149RSBT from Texas Instruments is a dual-mode DisplayPort++ to HDMI/DVI retimer IC supporting up to 3.4 Gbps per lane, integrated CDR and adaptive/fixed equalization, with 40-pin WQFN (5 mm × 5 mm) packaging for industrial-temperature (–40°C to 85°C) video interface applications in GPU-to-HDMI dongles and docking stations.

For engineers reviewing the SN65DP149RSBT datasheet, SN65DP149RSBT pinout, SN65DP149RSBT application, or SN65DP149RSBT equivalent, this page delivers verified technical context, real-world signal integrity features, TMDS output compliance data, and validated alternative options for DP++ to HDMI conversion designs requiring retiming at Ultra HD (4K/30 Hz) and 1080p/60 Hz resolutions.

Technical Context

The SN65DP149RSBT implements a full retimer architecture above 1.0 Gbps - including clock data recovery (CDR), adaptive receiver equalization (2–14 dB), and programmable fixed equalization (7.5 dB or 14 dB) - to recover jittered DP++ input signals and regenerate clean TMDS outputs compliant with HDMI 1.4b and DVI 1.0 standards. It supports automatic redriver-to-retimer mode switching at 0.75–1.25 Gbps crossover.

Its dual-mode DP++ receiver accepts DisplayPort 1.1a Type 1/Type 2 signaling via DDC link identification, while its TMDS transmitter provides selectable de-emphasis (–2 dB / 0 dB), slew-rate control (3 levels), and external Vsadj resistor-adjustable voltage swing (400–600 mV single-ended) to meet cable and board trace loss requirements.

Key Specifications

Pinout & Package

SN65DP149RSBT uses a 40-pin, 0.4-mm pitch, 5.0 mm × 5.0 mm WQFN package with exposed thermal pad. Pin functions are validated per TI SLLSEL2C datasheet Rev C (July 2016), including fail-safe HPD, bidirectional DDC, and configurable control inputs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DP++ to HDMI retiming applications.

Compared with SN75DP149RSBT, SN65DP149RSBT adds –40°C startup capability critical for outdoor or unheated enclosures; compared with PS8408-BLQF, it omits HDCP but reduces BOM count and eliminates crystal dependency for cost-sensitive, non-protected video links.

Availability

SN65DP149RSBT is available at Aetrix Electronics and suitable for GPU interface dongles, docking stations, standalone graphics cards, and industrial HMI displays requiring stable component supply across extended lifecycle programs.

Supply support for SN65DP149RSBT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity solutions with broad industrial, automotive, and computing product portfolios.

SN65DP149RSBT belongs to TI's DisplayPort interface product line, engineered specifically for high-fidelity, low-latency DP++ to HDMI/DVI signal conversion in space-constrained, thermally demanding video interface applications.

FAQ

What is the primary function of the SN65DP149RSBT in a video interface design?

The SN65DP149RSBT serves as a dual-mode DisplayPort++ to HDMI/DVI retimer IC. It receives jittered DP++ signals, recovers embedded clock via CDR, equalizes degraded inputs, and regenerates clean TMDS outputs compliant with HDMI 1.4b and DVI 1.0. The SN65DP149RSBT operates across 0.25–3.4 Gbps and supports automatic redriver/retimer mode switching - making it ideal for GPU-to-HDMI dongles and docking stations where signal integrity must be preserved over lossy interconnects.

Does the SN65DP149RSBT support HDCP encryption?

No, the SN65DP149RSBT does not include HDCP encryption or decryption functionality. It is a physical-layer retimer only - handling signal conditioning, clock recovery, and protocol translation (DP++ to TMDS) without content protection. For HDCP-compliant designs, an external HDCP controller or alternate solution such as the PS8408-BLQF must be used. The SN65DP149RSBT remains suitable for non-protected video paths in industrial HMIs, test equipment, and developer evaluation platforms.

What temperature range is specified for the SN65DP149RSBT?

The SN65DP149RSBT is characterized for an industrial operating temperature range of –40°C to +85°C. This specification is confirmed in the TI SLLSEL2C datasheet Rev C and applies to the RSB (WQFN) package variant. It distinguishes the SN65DP149RSBT from the SN75DP149RSBT, which is rated for 0°C to +85°C. The extended low-temperature capability makes the SN65DP149RSBT appropriate for deployment in unheated enclosures, outdoor kiosks, and factory-floor automation systems.

How is TMDS output voltage swing controlled on the SN65DP149RSBT?

The SN65DP149RSBT uses an external resistor connected between the VSADJ pin and ground to set TMDS output voltage swing. A 6.5-kΩ resistor yields a nominal 500-mV single-ended swing, meeting HDMI 1.4b specifications. The swing range is 400–600 mV depending on resistor tolerance and layout parasitics. This analog adjustment eliminates need for digital calibration or trimming circuits, and the VSADJ pin is explicitly defined in TI's recommended operating conditions and electrical characteristics tables for the SN65DP149RSBT.

Can the SN65DP149RSBT operate in both pin-strapped and I²C-configured modes?

Yes, the SN65DP149RSBT supports dual configuration methods. When I2C_EN/PIN is low, device behavior is set by pin strapping (e.g., EQ_SEL/A0, PRE_SEL, HDMI_SEL/A1). When I2C_EN/PIN is high, all configuration is performed via I²C[4] commands - including equalization mode, de-emphasis, slew rate, and HDMI/DVI selection. The SN65DP149RSBT's register map and pin-function table confirm this dual-mode flexibility, enabling both simple hardware-based setup and dynamic firmware control in production systems.