NXP Semiconductors PTN3393BSY

Overview

PTN3393BSY from NXP Semiconductors is a DisplayPort v1.1a to VGA adapter IC integrating a 2-lane DisplayPort receiver and triple 8-bit DAC, supporting resolutions from VGA (25 MHz pixel clock) to WUXGA (193 MHz), with HBR at 2.7 Gbit/s per lane, 3.3 V single-supply operation, and Flash-over-AUX firmware upgradability for PC dongles and docking stations.

For engineers reviewing the PTN3393BSY datasheet, PTN3393BSY pinout, PTN3393BSY application, or PTN3393BSY equivalent, this page delivers verified technical context, validated pin functions, confirmed VGA timing compliance (VSIS 1.2), real-world power consumption data (~600 mW at UXGA), and field-deployable monitor detection via HPD and DPCD register reporting.

Technical Context

The PTN3393BSY implements a full DisplayPort v1.1a receiver with dual-mode Main Link (1- or 2-lane, RBR/HBR), Manchester-II coded AUX channel at 1 MHz, and integrated DPCD registers compliant with VESA standards. It bridges I2C-bus over AUX to sink-side DDC, enabling MCCS/DDC-CI protocol support without external translation logic.

Its analog subsystem features three current-source RGB DACs with 700 mVpp output into 37.5 Ω (doubly terminated 75 Ω), pixel clock support up to 240 MHz, and load-sensing-based monitor presence detection active only during vertical blanking to avoid screen disturbance.

Key Specifications

Pinout & Package

HVQFN40 package (SOT618-6), 6 mm × 6 mm × 0.85 mm, 0.5 mm pitch, lead-free, with exposed thermal pad connected to GND[1] for electrical integrity and thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPD12S016 and PS8315, PTN3393BSY uniquely combines 2-lane HBR support, Flash-over-AUX, single 3.3 V operation, and VESA-compliant load-sensing-making it optimal for field-upgradable, high-resolution VGA dongles and docks where power efficiency and protocol fidelity are critical.

Availability

PTN3393BSY is available at Aetrix Electronics and suitable for desktop docking stations, USB-C/DP Alt Mode dongles, and industrial HMI panels requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for PTN3393BSY 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 focused on secure connectivity solutions for automotive, industrial, and consumer applications, with deep expertise in interface and protocol bridging ICs.

The PTN3393BSY belongs to NXP's DisplayPort bridge product line, designed specifically to extend legacy VGA infrastructure using modern DP sources while maintaining VESA compliance, low power, and field serviceability.

FAQ

What is the maximum supported pixel clock rate for PTN3393BSY?

The PTN3393BSY supports a maximum pixel clock rate of 240 MHz, enabling WUXGA (1920×1200) at 60 Hz with reduced blanking. This limit is defined by the 2-lane DisplayPort v1.1a HBR bandwidth and the internal DAC architecture. At 8 bits per color, the practical upper bound is 180 MHz for full 24-bit RGB throughput, as confirmed in Table 5 of the official datasheet.

Does PTN3393BSY require an external crystal oscillator?

Yes, PTN3393BSY requires an external 27 MHz crystal connected between OSC_IN (pin 33) and OSC_OUT (pin 34). The on-chip oscillator circuit uses this crystal to generate precise timing references for the DAC and synchronization logic. No internal RC oscillator is provided; omission of the crystal prevents proper VGA output timing and sync generation.

How does PTN3393BSY handle monitor detection and HPD signaling?

PTN3393BSY uses an internal load-sensing circuit that measures termination impedance during vertical blanking to distinguish 37.5 Ω (disconnected) from 75 Ω (connected). Detection status updates DPCD register 00200h and triggers an HPD IRQ pulse. HPD behavior is configurable via S0 pin: tied HIGH enables monitor-aware HPD assertion; left open (logic 0) follows VESA v1.1a default behavior.

Can PTN3393BSY operate from a single 3.3 V supply?

Yes, PTN3393BSY is designed for single 3.3 V ±10 % operation across all power domains: VDDD33_CORE, VDDD33_IO, VDDA33_AUX, VDDA33_DP, and VDDA33_DAC. It draws no additional core voltage-eliminating need for 1.2 V or 1.8 V regulators-and consumes ~600 mW at UXGA/162 MHz, as measured in active mode per Section 2.4 of the datasheet.

What I2C-bus speeds does PTN3393BSY support over DDC, and how are they controlled?

PTN3393BSY supports I2C-bus speeds of 1, 3, 10, 50, and 100 kbit/s over the sink-side DDC interface. Speed selection is controlled dynamically via DPCD register 00109h, which the DisplayPort source writes after reading capability register 0000Ch. Default speed is set by S2 pin (50 kbit/s if pulled high, 10 kbit/s if pulled low), but software override takes precedence.