Silicon Image SiI9226

Mobile HD Link (MHL) Transmitter

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Key Features

The SiI9226 Mobile HD Link Transmitter facilitates the design of low pin count, low-power mobile HDMI-interoperable applications.

It implements the Mobile HD Link (MHL) standard to carry formatted video and audio to Mobile HD Link-capable receivers, using five pins on a mobile connector. Mobile HD Link signalling is readily converted to a standard HDMI compliant signal when needed.

Silicon Image MHL products use the latest generation of TMDS core technology. With this ultra low-power solution, HD camcorders, digital still cameras, and personal mobile devices can connect to a large installed base of HDMI TVs.


The SiI9226 transmitter combined with an MHL capable receiver such as SiI9290 meets the HDMI 1.3 compliance test specification.

  • The transmitter sends all data over a single differential pair instead of three pairs, with the clocking signal superimposed over the data signal as a common mode signal
  • A single wire control bus supports all sideband signalling for DDC, CEC, HPD, and Receiver sense
  • The receiver converts received data to standard HDMI.

The transmitter supports 640 x 480, 480/576i, 480/576p, 720p/1080i, and all CEA resolutions in between (75MHz input, 225MHz at the link).

  • The RGB parallel interface supports HD MPEG decoders in DSCs and DVCs
  • 8/10/12-bit or 16/20/24-bit YCbCr 4:2:2
  • ITU-R BT.601/656, BTA-T1004 video input formats
  • 24-bit RGB/YCbCr 4:4:4
  • Colour space conversions between YCbCr and RGB
  • Input clock divider (0.5x, 2x, 4x)
  • Programmable DE generation and sync extraction

The SiI9226 Mobile HD Link Transmitter offers these additional features:

  • High-end digital audio interface
  • Two I2S (IEC60958 and IEC61937 compliant) input lanes supporting four audio channels
  • S/PDIF input supporting multi-channel (5.1) Dolby Digital, DTS, MPEG2 Audio, two channel PCM (32-192 kHz Fs sample rate)
  • MCLK generator for S/PDIF operation without external clock PLL; external MCLK optional
  • 2:1 and 4:1 down-sampling to handle 96 kHz and 192 kHz audio streams.
  • Consumer Electronics Control (CEC) hardware protocol and arbitration logic, software-compatible with other Silicon Image CEC products
  • Single slave I2C from host, for internal register access as well as remote DDC access MHL CTRL pin, simplifies board layout and lowers cost
  • Implements an advanced programming interface to eliminate over 90% of host processor firmware
  • Fully automatic calculation of S/PDIF audio CTS/N values
  • 1.2 V core consumes minimal power in both active and standby modes
  • 64-ball VFBGA package, 0.5 mm pitch, 5x5 mm footprint
  • Standard part covers extended (-20 to +85°C) temperature range.

Ordering Options

Part Number Package Tray size Brick size
SiI9226EBT 64-ball VFBGA 490 2450