NXP Semiconductors PTN3392BS,518

Overview

PTN3392BS,518 from NXP Semiconductors is a DisplayPort 1.1a to VGA adapter IC integrating a dual-lane DP receiver and triple 8-bit DAC for analog RGB output. It supports resolutions from VGA (640×480@60 Hz, 25 MHz pixel clock) to WUXGA (1920×1200@60 Hz, 193 MHz), operates at 2.7 Gbit/s or 1.62 Gbit/s per lane, and delivers 700 mVpp analog video into 75 Ω double-terminated loads. It enables field firmware upgrades via Flash-over-AUX in dongle applications.

For engineers reviewing the PTN3392BS,518 datasheet, PTN3392BS,518 pinout, PTN3392BS,518 application, or PTN3392BS,518 equivalent, key selection criteria include its VESA VSIS 1.2-compliant analog output, I²C-over-AUX DDC bridging, HPD-driven monitor detection, single 3.3 V supply operation, and HVQFN48 thermal-enhanced package compatibility with standard VGA cable lengths up to 100 feet.

Technical Context

The PTN3392BS,518 implements a full DisplayPort v1.1a receiver with CDR-based lane recovery, Manchester-II encoded AUX channel handling, and DPCD register mapping compliant with VESA standards. Its digital subsystem extracts main stream video attributes during vertical blanking and reconstructs timing for DAC conversion.

It integrates three independent 8-bit current-source DACs with RSET-controlled full-scale current (1.2 kΩ), outputs HSYNC/VSYNC TTL signals with 36 Ω series termination, and performs load-sensing-based monitor presence detection during vertical blanking-ensuring zero screen disturbance. Power management includes active (~600 mW at UXGA), low-power (~40 mW), and dynamic power-down modes.

Key Specifications

Pinout & Package

PTN3392BS,518 is housed in a 48-pin HVQFN package (7 mm × 7 mm × 0.85 mm, 0.5 mm pitch), thermally enhanced with an exposed center pad requiring PCB thermal vias and ground connection for proper operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ANX7411 and PS8315, PTN3392BS,518 uniquely combines DP 1.1a compliance, Flash-over-AUX upgradability, single 3.3 V operation, and VESA VSIS 1.2 analog output in a thermally optimized 48-pin HVQFN-making it the most balanced choice for high-volume, cost-sensitive VGA adapter designs.

Availability

PTN3392BS,518 is available at Aetrix Electronics and suitable for desktop docking stations, USB-C/DP-to-VGA dongles, and industrial control panels requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for PTN3392BS,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 leader specializing in secure connectivity solutions for automotive, industrial, and consumer applications, with deep expertise in interface and mixed-signal IC design.

The PTN3392BS,518 belongs to NXP's DisplayPort bridge IC product line, engineered specifically for cost-effective, single-supply conversion from digital DisplayPort sources to legacy analog VGA sinks in compact adapter form factors.

FAQ

What display resolutions does the PTN3392BS,518 support?

The PTN3392BS,518 supports all VESA-standard resolutions from VGA (640×480@60 Hz, 25 MHz pixel clock) to WUXGA (1920×1200@60 Hz, 193 MHz), including UXGA, SXGA, XGA, SVGA, and VGA. It handles up to 240 MHz pixel clock rate and supports 6- or 8-bit color depth natively, with higher bit depths truncated to 8 MSBs. The PTN3392BS,518 achieves this using its triple 8-bit DAC and DisplayPort v1.1a receiver architecture.

How does the PTN3392BS,518 handle monitor detection and HPD signaling?

The PTN3392BS,518 performs load-sensing-based monitor detection during vertical blanking periods using internal circuitry that identifies 37.5 Ω (monitor connected) or 75 Ω (disconnected) termination. It reports status via DPCD register updates and generates HPD IRQ pulses. HPD behavior is configurable via the S0 strap pin: S0 = 0 asserts HPD HIGH regardless of detection (VESA-compliant), while S0 = 1 drives HPD HIGH only upon confirmed VGA monitor presence. This ensures reliable sink enumeration in the PTN3392BS,518.

Can the PTN3392BS,518 operate from a single 3.3 V supply?

Yes, the PTN3392BS,518 is designed for single 3.3 V ±10 % supply operation and draws power directly from the DisplayPort connector's DP_PWR pin-eliminating the need for external DC-DC regulators or LDOs. It internally distributes this supply to digital core (VDDD), I/O (VDD_IO), analog DAC (VDD_DAC), DisplayPort receiver (VDDA_DP), and AUX/PLL (VDDA) domains. Power consumption is ~600 mW at UXGA/162 MHz and drops to ~40 mW in low-power mode, making the PTN3392BS,518 ideal for power-constrained dongles.

What is Flash-over-AUX and how is it used with the PTN3392BS,518?

Flash-over-AUX is a field-upgradability feature of the PTN3392BS,518 that enables firmware updates via the DisplayPort auxiliary channel without requiring JTAG or dedicated programming hardware. The PTN3392BS,518's integrated flash memory and MCU allow new firmware images to be delivered over AUX using standard DisplayPort transaction protocols. This capability simplifies post-deployment maintenance for PTN3392BS,518-based dongles and docking stations deployed across large user bases.

Does the PTN3392BS,518 support I²C communication between the DisplayPort source and VGA monitor?

Yes, the PTN3392BS,518 bridges I²C-bus traffic between the DisplayPort source and VGA monitor's DDC bus using its I²C-over-AUX capability. It supports I²C speeds from 1 kbit/s to 100 kbit/s, with default speed determined by the S2 strap pin and dynamically adjustable via DPCD register 00109h. This enables full EDID read, DDC-CI, and MCCS command support-ensuring the PTN3392BS,518 fully complies with VESA DDC standards for monitor identification and control.