Overview
The IP4786CZ32S, produced by Nexperia USA Inc., is a specialized integrated circuit designed to protect High-Definition Multimedia Interface (HDMI) transmitter host interfaces. This component integrates multiple protection and buffering functions to ensure reliable and high-quality HDMI signal transmission. It includes HDMI 5 V overcurrent/overvoltage protection, Display Data Channel (DDC) and Consumer Electronic Control (CEC) buffering and decoupling, hot plug detect, backdrive protection, and robust ElectroStatic Discharge (ESD) protection for all I/Os, exceeding the IEC 61000-4-2 level 4 standard.
Key Specifications
| Parameter | Description |
|---|---|
| Package | 32-pin HVQFN leadless package |
| Supply Voltage | 3.3 V, 5 V |
| TMDS Bit Rate | 6.0 Gbps (600 Mcsc TMDS Character Rate) |
| Display Support | Ultra High-Definition (UHD) 4K (2160p) 60 Hz display modes |
| ESD Protection | ±12 kV contact ESD protection for all I/Os, exceeding IEC 61000-4-2 level 4 standard |
| DDC and CEC Buffering | Decoupling and buffering for DDC and CEC signals, supporting CMOS or LVTTL I/O cells down to 1.8 V |
| Hot Plug Detect | Internal hot plug detect module for simplifying HDMI transmitter control |
| Transmission Line Clamping (TLC) | TLC technology on TMDS lines to simplify routing and reduce impedance discontinuities |
| Overcurrent/Overvoltage Protection | Enhanced 60 mA overcurrent/overvoltage linear regulator for HDMI-compliant 5 V output with up to 6.5 V inputs |
Key Features
- HDMI 2.0 and all backward compatible standards supported
- Impedance matched 100 Ω differential transmission line ESD protection for TMDS lines (±10 Ω), no PCB pre-compensation required
- Simplified flow-through routing utilizing less overall PCB space
- DDC capacitive decoupling between system side and HDMI connector side, and buffering to drive cables with high capacitive load (> 700 pF/25 m)
- Integrated pull-ups and pull-downs for HDMI compliance and backdrive protection
- Robust ESD protection without degradation after repeated ESD strikes
- Highest integration in a small footprint, optimized RF routing
Applications
- Tablet and notebook PCs
- Portable Media Players
- Digital Still Cameras (DSC)
- High-Definition (HD) and Standard-Definition (SD) Blu-ray and DVD players
- Set-top boxes (STB)
- PC graphic cards
- Game consoles
- HDMI picture performance quality enhancer modules
- Digital Visual Interface (DVI)
Q & A
- What is the primary function of the IP4786CZ32S?
The IP4786CZ32S is designed to protect High-Definition Multimedia Interface (HDMI) transmitter host interfaces, providing ESD protection, overcurrent/overvoltage protection, and signal buffering.
- What are the supported display modes for the IP4786CZ32S?
The component supports Ultra High-Definition (UHD) 4K (2160p) 60 Hz display modes.
- What is the level of ESD protection provided by the IP4786CZ32S?
The component provides ±12 kV contact ESD protection for all I/Os, exceeding the IEC 61000-4-2 level 4 standard.
- How does the IP4786CZ32S handle hot plug detection?
The component includes an internal hot plug detect module to simplify the application of the HDMI transmitter to control the hot plug signal.
- What is the significance of Transmission Line Clamping (TLC) in the IP4786CZ32S?
TLC technology on TMDS lines simplifies routing and helps reduce impedance discontinuities.
- What kind of buffering does the IP4786CZ32S provide for DDC and CEC signals?
The component decouples the internal capacitive load from the external capacitive load and redrives the DDC and CEC signals, allowing the use of longer or cheaper HDMI cables with higher capacitance.
- What is the package type of the IP4786CZ32S?
The component is packaged in a 32-pin HVQFN leadless package.
- What are some common applications for the IP4786CZ32S?
Common applications include tablet and notebook PCs, portable media players, digital still cameras, HD and SD Blu-ray and DVD players, set-top boxes, PC graphic cards, game consoles, and HDMI picture performance quality enhancer modules.
- Does the IP4786CZ32S support backward compatible HDMI standards?
Yes, the component supports HDMI 2.0 and all backward compatible standards.
- How does the IP4786CZ32S ensure signal integrity on the TMDS lines?
The component uses impedance-matched diode configurations to minimize impedance discontinuities caused by typical shunt diodes.
