NXP TDA19978A四路HDMI 1.4a接收解决方案

NXP 公司的TDA19978A集成了均衡器的四路HDMI 1.4a兼容的接收器，并嵌入了EDID存储器，内置的均衡器可改善信号质量，使0.5 mm (24 AWG)电缆长达25米。TDA19978A和标准HDMI 1.4a, DVI 1.0, CEA-861-D 以及HDCP 1.4兼容，HDMI频率高达250MHz，主要用在HDTV，高端TV，YCbCr 或RGB高速视频数字化仪，家庭影院，投映电视，等离子电视和LCD TV等。本文介绍了TDA19978A主要特性，方框图，应用案例框图和应用电路图。

TDA19978A：Quad HDMI 1.4a receiver interface with equalizer (HDTV up to 1080p, up to UXGA for PC formats)

The TDA19978A is a four input HDMI 1.4a compliant receiver with embedded EDID memory. The built in auto-adaptive equalizer improves signal quality and allows the use of cable lengths up to 25 m (laboratory tested with a 0.5 mm (24 AWG) cable at 2.05 gigasamples per second). The HDCP key set is stored in non-volatile One Time Programmable (OTP) memory for maximum security. In addition, the TDA19978A is delivered with software drivers to ease configuration and use.

The TDA19978A supports:

• TV resolutions:

– 480i (1440 480i at 60 Hz), 576i (1440  576i at 50 Hz) to HDTV (up to 1920 1080p at 50/60 Hz)

– WUXGA (1920 1200p at 60 Hz) reduced blanking format

• PC resolutions:

– VGA (640 480p at 60 Hz) to UXGA (1600 1200p at 60 Hz)
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