If you have questions about the product, or encounter any, you can register the site account,
Then go to the technical support forum to ask for help.


  • HDMI Receiver compliant with HDMI 1.4 specifications

  • Support multiple output formats:

    • SDTV format (CVBS or S-Video output, NTSC and PAL)

    • Analog RGB output for VGA with Triple 9-bit DAC up to 200MHz pixel rate. Sync signals can be provided in separated or composite manner. Support VESA and CEA timing standards up to UXGA and 1920x1080@60Hz


  • On-chip Audio encoder which support 2 channel IIS/S/PDIF audio output

  • VGA output is compliant with VESA VSIS v1r2 specification

  • MCU embedded to handle the control logic

  • Support device boot up by automatically loading firmware from on-chip flash

  • Integrated EDID Buffer

  • TV/VGA connection detection supported

  • HDMI input detection supported

  • Scaler engine integrated for 640x480 safe mode input supported in SDTV output application

  • Support Auto Power Saving mode and low stand-by current

  • Support RGB to YCC conversion in ITU-R BT.601 and 709 color space

  • IIC slave interface and HDMI DDC interface are available for debug and firmware update.

  • Low power architecture

  • RoHS compliant and Halogen free package

  • Offered in 40-Pin QFN package (5 x 5 mm)


Chrontel’s CH7105B is a low-cost, low-power semiconductor device that consists of HDMI receiver, three separate 9-bit video Digital-to-Analog Converters (DACs), SDTV encoder and audio encoder, which can convert HDMI signals into CVBS/S-Video/VGA outputs with IIS or SPDIF audio output.

The HDMI Receiver integrated is compliant with HDMI 1.4b. With sophisticated MCU and the on-chip flash, CH7105B supports auto-boot and EDID buffer. Take the advantage of Firmware auto loaded from the embedded flash, CH7105B can support HDMI input detection, DAC connection detection and determine to enter into SDTV mode or VGA mode or Power saving mode automatically.

Structure diagram

Data sheet

Application Desc

  Refer to the AN-B037 for industrial products in detail  

  Refer to the AN-B030

Technical Report



Input Interface   HDMI, DVI

Output Interface   VGA, CVBS , S-Video

Audio Interface   IIS, SPDIF Output

Other features   No

Package Type   QFN40


Part Number Package Type Operating Temperature Range Minimum Order Quantity

CH7105B-BF   40 QFN, Lead-freeCommercial : 0 to 70°C490/Tray

CH7105B-BFI  40 QFN, Lead-freeIndustrial : -40 to 85°C490/Tray




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...


Address:2210 O’Toole Ave. Suite 100, San Jose, CA 95131-1326

TEL: (408) 383-9328

FAX: (408) 383-9338

Copyright © 1998-2017 Chrontel, Inc. All Rights Reserved.          Privacy protection Legal statement