PTN3356R1BSMP

Overview

The PTN3356R1BSMP is a ROM-based DisplayPort to VGA adapter IC optimized for motherboard applications. It converts DisplayPort signals from the chipset to analog video for direct connection to VGA connectors. The device integrates a DisplayPort receiver, a high-speed triple 8-bit video DAC, and an MCU. It supports two DisplayPort lanes operating at HBR (2.7 Gbit/s) or RBR (1.62 Gbit/s). Powered by a single 3.3 V supply, it consumes approximately 200 mW during WUXGA streaming and 410 μW in low-power mode. The chip features a 32-pin HVQFN package measuring 5 mm x 5 mm x 0.85 mm.

Feature Summary

• Integrates a DisplayPort receiver with clock data recovery and a triple 8-bit video digital-to-analog converter.
• Supports VESA-compliant DisplayPort main link modes including High Bit Rate and Reduced Bit Rate.
• Bridges the VESA DDC channel to the DisplayPort interface via I2C-over-AUX protocol.
• Includes monitor presence detection through RGB line load sensing.

Applications

• Notebook computers
• Tablets and desktop PCs
• Dongles, adapters, and docking stations

Procurement Notes

Verify the specific ordering suffix 'BSMP' against NXP documentation to confirm packaging details such as reel size and tape-and-reel specifications. Ensure compatibility with the required temperature range of 0 °C to +85 °C. Confirm that the board layout accommodates the 32-pin HVQFN package dimensions and thermal pad requirements for proper operation.

Selection Notes

Select this component when a compact, low-power solution is needed to bridge DisplayPort sources to legacy VGA displays. It is suitable for designs requiring integrated EDID handling and monitor detection without external logic. Consider the power consumption differences between DC-DC converter and LDO modes based on system thermal constraints.

Part Context

This part belongs to the PTN3356 family of DisplayPort to VGA adapters. It is functionally similar to the PTN3355 but includes ROM-based firmware for simplified integration. The PTN3392 is a related discontinued model offering two-lane conversion. These components address the industry need for converting high-speed digital display interfaces to analog VGA standards.

Replacement Considerations

The PTN3392BS is a previously manufactured alternative for two-lane DP to VGA conversion but is no longer produced. Designers should verify if the PTN3356R1 provides sufficient feature parity for their specific application requirements before transitioning from older models.

FAQ

How does the PTN3356R1 handle monitor detection?

It performs load sensing on the RGB lines to detect the presence or absence of a VGA monitor load termination. Connection status changes are reported to the source via HPD interrupts and DPCD updates.

What is the maximum pixel clock rate supported?

The device supports a pixel clock rate up to 240 MHz at 18 bits per color, or up to 180 MHz at 24 bits per color, limited by the bandwidth of a standard 2-lane DisplayPort configuration.

How is the internal voltage regulation configured?

The device can use an external inductor with its internal switching regulator for lower power consumption (~200 mW) or operate without the inductor using an internal LDO, which consumes higher power (~400 mW).