Texas Instruments SN75DP159RGZT

Overview

SN75DP159RGZT from Texas Instruments is a 6-Gbps AC-coupled TMDS™ to HDMI™ level shifter retimer IC supporting HDMI 2.0b electrical compliance, DisplayPort dual-mode (DP++) standard v1.1, and automatic redriver/retimer mode selection. It features adaptive + fixed receiver equalization up to 16.5 dB, programmable pre-emphasis and slew rate control, and integrated CDR for jitter cleanup - deployed in HDMI dongles, docking stations, and GPU-to-monitor interface bridges.

For engineers reviewing the SN75DP159RGZT datasheet, SN75DP159RGZT pinout, SN75DP159RGZT application, or SN75DP159RGZT equivalent, this page delivers verified technical context, real-world signal integrity parameters, package-specific pin functions, HDMI 2.0b timing role clarity, and validated alternative options for DP++ to HDMI conversion designs.

Technical Context

The SN75DP159RGZT implements a dual-mode physical layer translator: its AC-coupled differential inputs accept DisplayPort dual-mode (DP++) or TMDS signals, while its outputs drive HDMI 2.0b-compliant TMDS lanes at up to 6 Gbps per lane. It supports both Type-1 and Type-2 I2C-over-AUX bridging and includes an active I2C buffer for DDC link extension.

In retimer mode (>1 Gbps), the device uses embedded clock data recovery (CDR) to suppress high-frequency random jitter; in redriver mode (<1 Gbps), it applies adaptive or fixed equalization (7.5 dB or 14 dB) to compensate for inter-symbol interference from lossy PCB traces or cables. Lane swap and polarity inversion are supported on main input lanes via pin strap or I2C.

Key Specifications

Pinout & Package

SN75DP159RGZT is housed in a 48-pin, 0.4 mm pitch, 7 mm × 7 mm VQFN package (RGZ) with exposed thermal pad connected to ground. Pin functions are validated per TI SLLSEJ2G datasheet Rev. G (March 2020).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN65DP159RGZT, the SN75DP159RGZT offers identical functionality at lower cost and reduced thermal derating in commercial environments, while PS8408B-VFQFN48 trades AUX support and full 6-Gbps capability for simpler power architecture and lower unit price.

Availability

SN75DP159RGZT is available at Aetrix Electronics and suitable for HDMI dongles, GPU-to-monitor bridges, industrial display interfaces, and gaming system adapters requiring stable component supply across production lifecycles.

Supply support for SN75DP159RGZT 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 company specializing in analog, embedded processing, and connectivity technologies with over 90 years of innovation in high-reliability interface ICs.

The SN75DP159RGZT belongs to TI's DisplayPort-to-HDMI retimer product line, engineered specifically for seamless DP++ dual-mode conversion in space-constrained, thermally sensitive consumer and industrial video interface applications.

FAQ

What is the primary function of the SN75DP159RGZT in a DP-to-HDMI signal chain?

The SN75DP159RGZT serves as an AC-coupled TMDS-to-HDMI level shifter retimer that converts DisplayPort dual-mode (DP++) source signals into HDMI 2.0b-compliant TMDS outputs. It performs clock data recovery, jitter cleanup, adaptive equalization, and protocol-aware DDC/AUX bridging - enabling reliable 4K@60Hz video transmission where native HDMI sources are unavailable. The SN75DP159RGZT is essential for maintaining signal integrity across lossy cables or long PCB traces.

Does the SN75DP159RGZT support both HDMI 1.4b and HDMI 2.0b standards?

Yes, the SN75DP159RGZT is fully compliant with HDMI 2.0b electrical parameters and backward compatible with HDMI 1.4b. It supports data rates up to 6 Gbps per lane, enabling Ultra HD 4K×2K@60Hz with 8-bit color depth - a requirement of HDMI 2.0b - while maintaining interoperability with legacy HDMI 1.4b sinks. The SN75DP159RGZT automatically detects and configures for appropriate HDMI version based on link training and EDID negotiation.

How does the SN75DP159RGZT handle power management in portable applications?

The SN75DP159RGZT provides three distinct power states: active retimer mode (435 mW typical), active redriver mode (215 mW typical), and shutdown mode (10 mW). Its OE pin enables hardware-controlled power-down, and internal weak pullup allows clean reset sequencing. The dual-rail supply (3.3 V VCC, 1.1 V VDD) isolates analog and digital domains to minimize noise coupling - critical for battery-powered dongles and docking stations where thermal density and standby current matter. The SN75DP159RGZT's low shutdown current extends host system battery life during display sleep states.

Can the SN75DP159RGZT be configured without an I2C controller?

Yes, the SN75DP159RGZT supports full pin-strapped configuration via eight 3-level control pins (EQ_SEL/A0, PRE_SEL, SLEW_CTL, TX_TERM_CTL, SWAP/POL, HDMI_SEL/A1, I2C_EN/PIN, OE). When I2C_EN/PIN is pulled low, all key functions - including equalization mode, de-emphasis level, slew rate, termination impedance, and HDMI/DP mode - are set statically at power-up. This eliminates dependency on firmware or microcontroller initialization, making the SN75DP159RGZT ideal for simple dongles and plug-and-play adapters where I2C infrastructure is absent.

What is the significance of the AUX_SRCp/AUX_SRCn pins on the SN75DP159RGZT?

The AUX_SRCp and AUX_SRCn pins implement Type-2 I2C-over-AUX bridging - a DP++ dual-mode requirement that allows HDMI DDC communication to be tunneled through the DisplayPort AUX channel. This enables EDID reads, HDCP handshakes, and vendor-specific extensions without requiring separate I2C routing on the PCB. These pins are exclusive to the RGZ package (SN75DP159RGZT) and are absent in the WQFN variant. Their presence makes the SN75DP159RGZT suitable for certified DP++ dongles where AUX-based DDC translation is mandatory for compliance.