FEATURES GENERAL DESCRIPTION
 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)
APPLICATION
 Car Infotainment Device
 HDMI to VGA/SDTV Adapter/Docking Station
 Notebook/Ultrabook
 IPC
 Handheld/Portable Device
 Digital Video Systems
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.