IP4788CZ32数据手册集成电路（IC）的专用规格书PDF

描述 Description

DVI and HDMI interface ESD and overcurrent protection, DDC/CEC buffering, hot plug detect and backdrive protection - The IP4788CZ32 is designed to protect High-Definition Multimedia Interface (HDMI) transmitter host interfaces. It includes HDMI 5 V overcurrent / overvoltage protection, Display Data Channel (DDC) buffering and decoupling, hot plug detect, backdrive protection, Consumer Electronic Control (CEC) buffering and decoupling, and ±12 kV contact ElectroStatic Discharge (ESD) protection for all I/Os, far exceeding the IEC 61000-4-2, level 4 standard. The IP4788CZ32 incorporates Transmission Line Clamping (TLC) technology on the high-speed Transition Minimized Differential Signaling (TMDS) lines to simplify routing and help reducing impedance discontinuities. All TMDS lines are protected by an impedance-matched diode configuration that minimizes impedance discontinuities caused by typical shunt diodes. The enhanced 60 mA overcurrent / overvoltage linear regulator guarantees HDMI-compliant 5 V output voltage levels with up to 6.5 V inputs. The DDC lines use a new buffering concept which decouples the internal capacitive load from the external capacitive load for use with standard Complementary Metal Oxide Semiconductor (CMOS) or Low Voltage Transistor-Transistor Logic (LVTTL) I/O cells down to 1.8 V. This buffering also redrives the DDC and CEC signals, allowing the use of longer or cheaper HDMI cables with a higher capacitance. The internal hot plug detect module simplifies the application of the HDMI transmitter to control the hot plug signal. All lines provide appropriate integrated pull-ups and pull-downs for HDMI compliance and backdrive protection to guarantee that HDMI interface signals are not pulled down when the system is powered down or enters Standby mode. Only a single external capacitor is required for operation.

特性 Features

·HDMI High-Speed, 340 MHz, deep color and HDMI Ethernet and Audio returnChannel (HEAC) compatible
·Impedance matched 100 Ω differential transmission line ESD protection forTMDS lines (±10 Ω). No Printed-Circuit Board (PCB) pre-compensation required
·Simplified flow-through routing utilizing less overall PCB space
·DDC capacitive decoupling between system side and HDMI connector side andbuffering to drive cable with high capacitive load (> 700 pF/25 m)
·All external I/O lines with ESD protection of at least ±12 kV, far exceeding theIEC 61000-4-2, level 4 standard
·Low rdyn ESD protection on all TMDS lines for improved clamping performance
·Hot plug detect module
·CEC buffering and isolation, with integrated backdrive-protected 26 kΩ pull-up
·Robust ESD protection without degradation after repeated ESD strikes
·Highest integration in a small footprint, PCB level, optimized RF routing, DFN5050-32package

应用 Application

·The IP4788CZ32 can be used for a wide range of HDMI source devices, consumerand computing electronics:·High-Definition (HD) and Standard-Definition (SD) Blu-ray and DVD players
·Set-top box
·PC graphic card
·Game console
·HDMI picture performance quality enhancer module
·Digital Visual Interface (DVI)