NXP Semiconductors PTN3356R1BSMP

Overview

PTN3356R1BSMP from NXP Semiconductors is a ROM-based DisplayPort-to-VGA adapter IC designed for motherboard-level video interface conversion, integrating a 2-lane DisplayPort receiver (2.7 Gbit/s HBR or 1.62 Gbit/s RBR), triple 8-bit DACs, and I²C-over-AUX DDC bridging to deliver analog RGB output up to WUXGA (1920×1200@60 Hz, 193 MHz pixel clock) with 700 mVpp drive into 75 Ω loads.

For engineers reviewing the PTN3356R1BSMP datasheet, PTN3356R1BSMP pinout, PTN3356R1BSMP application, or PTN3356R1BSMP equivalent, key selection considerations include its VESA-compliant DP 1.2a receiver capability, low-power operation (~200 mW active, 410 µW standby), monitor presence detection via RGB load sensing, and HVQFN32 package compatibility with standard 0.5 mm pitch PCB layouts.

Technical Context

The PTN3356R1BSMP implements full DisplayPort 1.2a physical layer reception with auto-equalization and CDR, supporting both 1- and 2-lane configurations at HBR (2.7 Gbit/s) or RBR (1.62 Gbit/s) per lane, with BER <10⁻⁹ and link down-spreading. Its AUX channel operates at 1 MHz with native syntax and I²C-over-AUX support for DDC/CI and MCCS protocols.

Internally, it integrates a timing recovery subsystem that extracts video attributes from DP main stream data during vertical blanking, drives triple 8-bit current-source DACs synchronized to recovered pixel clock (up to 240 MHz), and generates 3.3 V HSYNC/VSYNC outputs compliant with VSIS 1.2 for direct VGA connector interfacing.

Key Specifications

Pinout & Package

PTN3356R1BSMP is housed in a 32-pin HVQFN package (5 mm × 5 mm × 0.85 mm, 0.5 mm pitch) with exposed thermal pad (GND) requiring solder connection to PCB ground plane for electrical stability and thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DisplayPort-to-VGA conversion applications.

Compared with TPD12S016 and PS8315, PTN3356R1BSMP delivers superior out-of-box VGA compatibility through native I²C-over-AUX, autonomous load-based HPD reporting, and zero-firmware ROM architecture-reducing validation effort and improving time-to-market for DP-enabled platforms needing legacy analog output.

Availability

PTN3356R1BSMP is available at Aetrix Electronics and suitable for desktop motherboard integration, notebook docking adapters, industrial panel PC interfaces, and legacy display upgrade kits requiring stable component supply across long-life production cycles.

Supply support for PTN3356R1BSMP 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 leader specializing in secure connectivity solutions for automotive, industrial, and consumer applications, with deep expertise in interface and mixed-signal ICs.

The PTN3356R1BSMP belongs to NXP's DisplayPort bridge product line, engineered specifically to simplify migration from legacy analog video interfaces to modern high-speed digital interconnects while maintaining backward compatibility.

FAQ

What display resolutions does the PTN3356R1BSMP support?

The PTN3356R1BSMP supports resolutions from VGA (640×480@60 Hz) up to WUXGA (1920×1200@60 Hz) and 2048×1536@50 Hz, with pixel clock rates up to 240 MHz at 18 bpp or 180 MHz at 24 bpp. It handles all standard VGA colorimetry formats and supports reduced-blanking modes per CVT and VESA guidelines.

Does the PTN3356R1BSMP require external firmware or configuration memory?

No, the PTN3356R1BSMP is a ROM-based device with fixed functionality and no external firmware dependency. All configuration is handled via hardware pins (CFG1, CFG2, CFG5) or DPCD registers accessed over the AUX channel - eliminating boot code, EEPROM, or host processor involvement.

How does the PTN3356R1BSMP detect VGA monitor connection status?

The PTN3356R1BSMP performs periodic load sensing on the RED, GRN, and BLU analog outputs by pulsing the DACs and measuring impedance response. When a 75 Ω doubly terminated VGA monitor is detected, it asserts the HPD signal and updates DPCD registers to notify the DP source of sink presence or removal.

Can the PTN3356R1BSMP operate with different crystal frequencies?

Yes, the PTN3356R1BSMP supports 24 MHz, 25 MHz, or 27 MHz crystals via the CFG5 pin configuration (HIGH/LOW/OPEN). This flexibility allows precise pixel clock derivation across multiple display timings without requiring custom oscillator components.

What power supply requirements does the PTN3356R1BSMP have?

The PTN3356R1BSMP operates from a single 3.3 V supply applied to VDDA33_DNW, VDDE33_IO, and PVDD33 pins. It internally generates 1.5 V rails (VDDA15_DP, VDDA15_DAC, VDDD15) via an integrated switching regulator (SWOUT), reducing external power management complexity.