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  • Supporting analog RGB outputs for a display monitor

  • Supporting maximum pixel rate of 165MP/s or graphics resolutions up to 1920x1200[1]

  • High-speed SDVO[2] (1G~2Gbps) AC-coupled serial differential RGB inputs

  • Supporting monitor connection detection

  • Programmable power management

  • Fully programmable through serial port

  • Configuration through Intel® SDVO Opcode[2]

  • Offered in 64-pin LQFP package and 64-pin QFN package



[1] Reduced Blanking
[2] Intel® Proprietary


The CH7317B is a Display Controller device interfaces seamlessly to HDTV or PC monitors that is equipped with a VGA RGB interface display connector. Its input port, complied with Intel SDVO Specification 1.2, can accept a digital graphics, high-speed, AC-coupled, serial-differential RGB input signal, and convert it to analog RGB signal for driving the display.

The CH7317B supports maximum pixel rate of 165MP/s and is capable of displaying up to 1920x1200 resolution with reduced blanking. The built-in serial port controller will allow the graphics chipset to obtain the monitor’s EDID information or communicate with CH7317B internal registers through SDVO Opcodes. In addition, the transmitter is designed with a monitor connection detection algorithm that allows the graphics chipset to read back the connection status through CH7317B internal registers.

The CH7317B provides the Boundary-scan test to help system developers to check the interconnection between chip I/O and the printed circuit board for faults. When the device is powered down by the graphics chipset, its current consumption is less than 100uA. The CH7317B is available in 64-pin LQFP and 64-pin QFN packages.

Structure diagram


Data sheet

 View the CH7317B Datasheet

Application Desc

 PCB Layout and Design Considerations for the CH7317B SDVO / RGB DAC, AN-113.pdf

Technical Report



Input Interface  SDVO

Output Interface  VGA

Audio Interface  No

Other features  No

Package Type  LQFP64


Part Number Package Type Number of Pins Voltage Supply Temperature Grade

CH7317B-TF  Lead Free - LQFP642.5V & 3.3VCommercial / Automotive Grade 4

CH7317B-TF-TR  Lead Free - LQFP in Tape & Reel642.5V & 3.3VCommercial / Automotive Grade 4

CH7317B-BF  Lead Free - QFN642.5V & 3.3VCommercial / Automotive Grade 4

CH7317B-BF-TR  Lead Free - QFN in Tape & Reel642.5V & 3.3VCommercial / Automotive Grade 4




About Chrontel Overview Chrontel, headquartered in San Jose, California, is a privately-held company with over 130 employees worldwide. Incorporated in 1986, the company develops and markets mixed-signal integrated circuits for the PC, display and consumer mark...


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