PTN3300BHF2,518

Overview

The PTN3300BHF2,518 is a DVI and HDMI level shifter manufactured by NXP USA Inc. It converts four lanes of low-swing AC-coupled differential input signals to DVI and HDMI compliant open-drain current-steering differential output signals, supporting up to 2.25 Gbit/s per lane. The device operates on a single 3.3 V power supply (3.0 V to 3.6 V) with typical active consumption of 35 mA. It features integrated 50 Ω termination resistors for self-biasing inputs and provides level shifting for the DDC channel between 3.3 V and 5 V domains. The component is housed in a 48-terminal HWQFN package measuring 7 x 7 mm.

Feature Summary

• Translates low-swing AC-coupled differential inputs to TMDS-type DC-coupled outputs compliant with DVI v1.0 and HDMI v1.3a specifications.
• Provides transparent level shifting for DDC channels and HPD signals without requiring re-timing or software configuration.
• Includes back-current-safe designs on all sink-side terminals to prevent backdrive current when the device is unpowered.
• Supports power-saving modes via source-side disablement and sink-side detection to minimize current consumption.

Applications

• Multi-mode display source devices supporting multiple standards like DisplayPort, HDMI, and DVI.
• Consumer video applications requiring voltage translation between 3.3 V sources and 5 V sinks.
• Systems utilizing PCI Express electrical signaling configurations for display interfaces.

Procurement Notes

Verify the specific ordering suffix HF2 corresponds to the HWQFN48 plastic thermal enhanced package variant rather than the resin-based HF variant. Confirm RoHS compliance status and ensure the datasheet revision matches the required design specifications. Check for any end-of-life notifications as this product data sheet dates from 2008.

Selection Notes

Select the PTN3300B over the PTN3300A if non-inverting HPD functionality is required, as the PTN3300A provides an inverting function shifted to 1.1 V. Consider the PTN3301 if active buffering of DDC lines and HDMI dongle detect capabilities are necessary. Ensure the application supports the 3.3 V supply voltage range and utilizes AC-coupled differential inputs.

Part Context

This component belongs to the PTN3300 family of high-speed level shifters designed for consumer electronics. It serves as a bridge between multi-mode I/O sources and standard DVI/HDMI sinks. The device enables chipset vendors to implement reconfigurable I/Os while maintaining low pin counts. It is distinct from the PTN3301, which offers additional features like dongle detection.

Replacement Considerations

PTN3300BHF is a compatible alternative using a laminate-based HWQFN48R package. PTN3300A is functionally similar but provides an inverting HPD output shifted to 1.1 V. For designs requiring HDMI dongle detection and active DDC buffering, the PTN3301 is the recommended upgrade.

FAQ

How does the PTN3300B handle power consumption when no display is connected?

The device automatically enters Standby mode when the HPD_SINK input is LOW, indicating no display is connected. This minimizes power consumption by disabling both TMDS and DDC channels.

What is the purpose of the REXT pin?

The REXT pin is an analog current sense port used to provide an accurate current reference for the differential outputs. Connecting a 10 kΩ resistor (1% tolerance) to GND ensures optimal output voltage swing accuracy.

Can the PTN3300B operate if it is unpowered while the monitor is powered?

Yes, the device features back-current-safe outputs on all sink-side terminals. This prevents current flow from a powered monitor into the unpowered PTN3300B, protecting the supply rails.