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  • HDMI Receiver compliant with HDMI 1.4 specification

  • Support ITU-R 601 or ITU-R 656 compatible YCbCr 4:2:2 output format with embedded syncs or discrete syncs. Support resolution up to 1280 x 720@60Hz for YCbCr 4:2:2 output

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

  • HDCP Engine compliant with HDCP 1.4 specification with internal HDCP Key

  • MCU embedded to handle the control logic

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

  • Integrated EDID Buffer

  • Crystal Free architecture

  • HDMI input detection supported

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

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

  • 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 CH7109A is a low-cost, low-power semiconductor device that consists of HDMI receiver, YCbCr 4:2:2 encoder and audio encoder, which can convert HDMI signals into 8 bit YCbCr 4:2:2 outputs with IIS or SPDIF audio output.

The HDMI Receiver integrated is compliant with HDMI 1.4b and supports HDCP 1.4 specifications with internal HDCP key.

With sophisticated MCU and the on-chip flash, CH7109A supports auto-boot and programmable EDID ROM. Take the advantage of Firmware auto loaded from the embedded flash, CH7109A can support HDMI input detection enter into Power saving mode automatically.

Structure diagram

Data sheet

Application Desc

 PCB Layout and Design Guide for CH7109A HDMI to BT656 Converter With IIC Master Controller, AN-B034 (Rev0.1)

  Refer to the AN-B037 for industrial products in detail

Technical Report



Input Interface HDMI, DVI

Output Interface  TTL / BT656

Audio Interface  IIS, SPDIF Output

Other features   No

Package Type   QFN40


Part Number Package Type Operating Temperature Range Minimum Order Quantity

CH7109A-BF  40 QFN, Lead-freeCommercial : 0 to 70°C490/Tray

CH7109A-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...


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