PTN3355BSMP

Overview

The PTN3355BSMP is a DisplayPort to VGA adapter integrated circuit manufactured by NXP USA Inc. It converts digital DisplayPort signals into analog RGB video for VGA displays, featuring an integrated 1:2 VGA switch optimized for motherboard applications. The device supports one or two DisplayPort lanes operating at High Bit Rate (HBR) of 2.7 Gbit/s per lane or Reduced Bit Rate (RBR) of 1.62 Gbit/s per lane. It includes a triple 8-bit video DAC capable of pixel clocks up to 240 MHz and supports resolutions from VGA to WUXGA. Powered by a single 3.3 V supply, it consumes approximately 200 mW during active streaming and 410 µW in low-power mode. The component is housed in a 40-pin HVQFN package.

Feature Summary

• Integrates a DisplayPort receiver with a high-speed triple video digital-to-analog converter and a 1:2 VGA switch.
• Supports I2C-bus over AUX channel protocol for DDC/CI and MCCS compliance.
• Enables monitor presence detection through load sensing on RGB lines.
• Allows firmware upgradability via Flash-over-AUX scheme or I2C-bus interface.

Applications

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

Procurement Notes

Verify the specific ordering part number PTN3355BSMP against the manufacturer's current production status before procurement. Confirm that the required firmware version matches the 'latest' designation associated with the BS suffix. Ensure the design accommodates the 40-pin HVQFN package dimensions and thermal requirements specified in the datasheet.

Selection Notes

Select this component when a low-power, highly integrated solution is needed to bridge DisplayPort sources to legacy VGA monitors. Consider the integrated 1:2 VGA switch if the design requires routing signals between main board and docking connectors without discrete components. Verify that the host system supports the necessary DisplayPort link rates and AUX channel communication protocols.

Part Context

The PTN3355BSMP belongs to the PTN3355 family of DisplayPort to VGA converters. It is specifically designed for motherboard applications where space and power efficiency are critical. The BS suffix indicates the use of the latest firmware version available at the time of manufacturing, distinguishing it from variants with fixed older firmware versions.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult NXP directly for alternative recommendations or verify compatibility with newer generations of display interface controllers.