NXP Semiconductors PTN3300AHF,518

Overview

PTN3300AHF,518 from NXP Semiconductors is a DVI/HDMI level shifter IC that converts four lanes of low-swing AC-coupled differential inputs (DisplayPort/PCIe-compliant) to TMDS-compliant open-drain current-steering outputs at up to 2.25 Gbit/s per lane, with integrated 50 Ω input termination, inverting 1.1 V HPD output, and bidirectional DDC level shifting between 3.3 V source and 5 V sink sides. It operates from a single 3.3 V supply and supports power-saving standby mode via HPD_SINK or OE_N.

For engineers reviewing the PTN3300AHF,518 datasheet, PTN3300AHF,518 pinout, PTN3300AHF,518 application, or PTN3300AHF,518 equivalent, this device serves as a transparent, re-timing-free bridge for multi-mode display sources requiring HDMI/DVI electrical compliance while minimizing I/O count and power consumption in embedded graphics interfaces.

Technical Context

The PTN3300AHF,518 implements self-biasing differential input receivers compliant with DisplayPort v1.1 and PCIe v1.1, paired with open-drain current-steering TMDS outputs meeting DVI v1.0 and HDMI v1.3a specifications. Its REXT pin enables precise output current control via an external 10 kΩ resistor, ensuring accurate differential swing and timing across temperature.

Three independent enable paths govern operation: OE_N disables only TMDS lanes; DDC_EN isolates the I²C-based DDC channel; and HPD_SINK automatically places both TMDS and DDC into standby when no sink is connected. All sink-side terminals feature back-current protection, allowing safe operation when the display is powered but the shifter is unpowered.

Key Specifications

Pinout & Package

PTN3300AHF,518 uses the HWQFN48R package: plastic thermal-enhanced very thin quad flat package, 7 × 7 × 0.7 mm body, resin-based, no leads, with exposed thermal pad and 48 terminals. GND pins (1, 5, 12, 18, 24, 27, 31, 36, 37, 43) and the center thermal pad must be soldered to PCB ground for proper thermal dissipation and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DVI/HDMI level shifting applications.

Compared with PTN3300AHF,518, PTN3300BHF,518 offers identical performance with inverted HPD logic removed, while PTN3301AHF,518 adds active DDC buffering and HDMI dongle detection at the cost of increased complexity - making PTN3300AHF,518 optimal for cost-sensitive, DVI/HDMI display bridging where passive DDC and inverting HPD are acceptable.

Availability

PTN3300AHF,518 is available at Aetrix Electronics and suitable for display interface bridging, embedded graphics modules, and HDMI adapter designs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for PTN3300AHF,518 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

NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and consumer applications, with leadership in interface, analog, and mixed-signal ICs.

The PTN3300AHF,518 belongs to NXP's display interface level shifter product line, designed specifically to enable multi-standard video output from compact, low-pin-count display sources while maintaining HDMI/DVI electrical compliance and power efficiency.

FAQ

What is the primary function of the PTN3300AHF,518 in a display interface system?

The PTN3300AHF,518 acts as a transparent, re-timing-free level shifter that converts four lanes of low-swing AC-coupled differential inputs (e.g., from DisplayPort or PCIe PHYs) into DVI/HDMI-compliant TMDS outputs. It also handles HPD inversion and bidirectional DDC level shifting. The PTN3300AHF,518 does not buffer, re-time, or modify signal content - it preserves timing and integrity while adapting electrical domains.

How does the PTN3300AHF,518 achieve power savings when no display is connected?

The PTN3300AHF,518 enters low-power standby mode automatically when HPD_SINK is LOW (indicating no sink connection), reducing supply current to ≤5 µA. This behavior is hardware-driven and requires no software intervention. The PTN3300AHF,518 also supports manual standby via OE_N (disables TMDS) or DDC_EN (disables DDC), offering flexible power management tailored to system needs.

Can the PTN3300AHF,518 be used with HDMI 2.0 or higher standards?

No - the PTN3300AHF,518 is specified for up to 2.25 Gbit/s per lane (225 MHz character clock), aligning with HDMI 1.3a and DVI 1.0. HDMI 2.0 requires ≥6 Gbit/s per lane. The PTN3300AHF,518 does not support TMDS clock doubling, scrambling, or other HDMI 2.0+ features. For newer standards, alternate solutions such as retimers or next-generation level shifters are required.

What is the purpose of the REXT pin on the PTN3300AHF,518, and what happens if it is left unconnected?

The REXT pin (pin 6) sets the output current reference for the TMDS drivers. Connecting a 10 kΩ ±1 % resistor to GND ensures optimal differential output voltage swing, rise/fall time, and VOL accuracy. If left unconnected or tied to VDD/GND directly, the PTN3300AHF,518 remains functional but exhibits reduced accuracy in output levels and timing over voltage/temperature - acceptable for non-critical applications but not recommended for HDMI/DVI compliance testing.

Is the PTN3300AHF,518 pin-compatible with the PTN3300BHF,518?

Yes - the PTN3300AHF,518 and PTN3300BHF,518 share identical pinout, package (HWQFN48R), and all electrical characteristics except HPD logic polarity: PTN3300AHF,518 provides inverting HPD_SOURCE_N, while PTN3300BHF,518 provides non-inverting output. No PCB layout change is needed when substituting between these two variants, provided the source-side HPD logic interpretation is adjusted accordingly.