NXP PTN3356R1BSMP: A Comprehensive Technical Overview of the HDMI/DVI Level Shifter IC
The NXP PTN3356R1BSMP is a highly integrated, low-power level shifter integrated circuit (IC) designed specifically for High-Definition Multimedia Interface (HDMI) and Digital Visual Interface (DVI) applications. It serves as a critical component in modern digital display systems, enabling seamless signal translation between devices operating at different voltage levels. This IC is engineered to meet the stringent requirements of high-speed digital video transmission, ensuring signal integrity and robust performance.
Primary Function and Role
The core function of the PTN3356R1BSMP is to act as a dual-supply level translator. In a typical application, it bridges a graphics controller or video source (e.g., a System-on-Chip or FPGA) operating at a lower core voltage (e.g., 1.8V) with HDMI or DVI transmitters that require a higher signaling voltage (3.3V). This translation is crucial for preventing signal degradation and ensuring compliance with the HDMI/DVI standard's electrical specifications.
Key Technical Features
Dual-Channel Operation: The device incorporates two independent differential channel translators, making it suitable for translating the Transition Minimized Differential Signaling (TMDS) clock and data signals used in HDMI/DVI.
Wide Voltage Range Support: It features a versatile dual-supply design. The VDD(A) supply (1.2V to 1.8V) connects to the low-voltage source side, while the VDD(B) supply (3.0V to 3.6V) powers the high-voltage TMDS output side.
High-Speed Performance: The PTN3356R1BSMP is designed to support very high data rates, exceeding 3 Gbps per channel, which is more than sufficient for resolutions up to 1080p and WUXGA, and supports higher bandwidths for advanced formats.
Low Power Consumption: Fabricated in an advanced CMOS process, the IC is optimized for very low static and dynamic power consumption, making it ideal for power-sensitive portable and consumer electronics.
Integrated Pre-Emphasis: A key feature for maintaining signal integrity over longer cable runs or in noisy environments, the built-in programmable output pre-emphasis compensates for high-frequency losses.
Automatic Flow-Through: The device is designed for ease of use, requiring no external control signals for its basic translation function. The direction of data flow is automatically managed.
Robust ESD Protection: It offers strong Electrostatic Discharge (ESD) protection on its I/O lines, safeguarding the connected components from damage during handling and operation.
Typical Application Circuit
In a standard implementation, the PTN3356R1BSMP is placed directly between the video processor and the HDMI connector. The low-voltage differential inputs (A1/A2 and B1/B2) connect to the source, while the high-voltage differential outputs (Y1/Y2 and Z1/Z2) drive the TMDS lines to the connector. Simple bypass capacitors are required on both supply rails to ensure stable operation.
Target Applications
This level shifter is ubiquitous in a wide array of consumer and professional electronics, including:
Digital Televisions (DTVs) and Monitors
Laptop PCs and Desktop Motherboards
Digital Set-Top Boxes (STBs) and Blu-ray Disc Players
Projectors and Video Switching Systems
ICGOODFIND Summary
The NXP PTN3356R1BSMP is a robust and highly efficient solution for voltage level translation in HDMI and DVI interfaces. Its combination of high-speed performance, integrated signal conditioning (pre-emphasis), and low-power operation makes it an industry-preferred choice for designers seeking to ensure reliable and compliant digital video connectivity in their products.
Keywords:
1. Level Shifter
2. HDMI
3. TMDS
4. Signal Integrity
5. Pre-emphasis
