General Description
The IT66121 is a high-performance and low-power single channel HDMI transmitter, fully compliant
with HDMI 1.3a, HDCP 1.2 and backward compatible to DVI 1.0 specifications. IT66121 also provide
the HDMI1.4 3D feature, which enables direct 3D displays through an HDMI link. The IT66121 serves
to provide the most cost-effective HDMI solution for DTV-ready consumer electronics such as set-top
boxes, DVD players and A/V receivers, as well as DTV-enriched PC products such as notebooks and
desktops, without compromising the performance. Its backward compatibility to DVI standard allows
connectivity to myriad video displays such as LCD and CRT monitors, in addition to the
ever-so-flourishing Flat Panel TVs.
Aside from the various video output formats supported, the IT66121 also supports 8 channels of I2S
digital audio, with sampling rate up to 192kHz and sample size up to 24 bits. IT66121 also support
S/PDIF input of up to 192kHz sampling rate.
The newly supported High-Bit Rate (HBR) audio by HDMI Specifications v1.3 is provided by the
IT66121 in two interfaces: with the four I2S input ports or the S/PDIF input port. With both interfaces
the highest possible HBR frame rate is supported at up to 768kHz
By default the IT66121 comes with integrated HDCP ROMs which are pre-programmed with HDCP
keys that ensures secure digital content transmission. Users need not worry about the procurement
and maintenance of the HDCP keys.
The IT66121 also provides a complete solution of Consumer Electronics Control (CEC) function. This
optional CEC feature of HDMI specification allows the user to control two or more CEC-enabled
devices through HDMI network. With IT66121 embedded CEC PHY, user can use high-level software
API to easily implement all the necessary remote control commands. The CEC bus related protocol is
handled by the CEC PHY which eliminates extra loading of the MCU.

Features
Single channel HDMI transmitter
Compliant with HDMI 1.3a, HDCP 1.2 and DVI 1.0 specifications
Supporting pixel rates from 25MHz to 165MHz
DTV resolutions: 480i, 576i, 480p, 576p, 720p, 1080i up to 1080p
PC resolutions: VGA, SVGA, XGA, SXGA up to UXGA
Various video input interface supporting digital video standards such as:
24-bit RGB/YCbCr 4:4:4 with RB swap option
16/20/24-bit YCbCr 4:2:2 with YC swap option
8/10/12-bit YCbCr 4:2:2 (CCIR-656)
BTA-T1004 format
DE-only interface
DDR option
Support HDMI1.4 3D feature
Frame packing mode up to 1080P@23.98/24Hz and 720P@59.94/60Hz
Top and Bottom up to 1080P@59.94/60Hz
Side-by-Side (Half) up to 1080P@59.94/60Hz
Side-by-Side (Full) up to 720P@59.94/60Hz
Bi-direction Color Space Conversion (CSC) between RGB and YCbCr color spaces with
programmable coefficients.
Digital audio input interface supporting
audio sample rate: 32~192 kHz
sample size: 16~24 bits
four I2S interfaces supporting 8-channel audio
S/PDIF interface supporting PCM, Dolby Digital, DTS digital audio transmission at up to
192kHz
Support for high-bit-rate (HBR) audio such as DTS-HD and Dolby TrueHD through the four I2S
interface or the S/PDIF interface, with frame rates as high as 768kHz
Compatible with IEC 60958 and IEC 61937
Software programmable HDMI output current, enabling user to optimize the performance for
fixed-cable systems or those with pre-defined cable length
MCLK input is optional for audio operation. Users could opt to implement audio input interface with
or without MCLK.
Integrated pre-programmed HDCP keys
Purely hardware HDCP engine increasing the robustness and security of HDCP operation
Monitor detection through Hot Plug Detection and Receiver Termination Detection
Embedded full-function pattern generator
Intelligent, programmable power management
Embedded hardware controlled CEC PHY
Ultra low power consumption, operation power is less than 70mw at 1080p@60Hz format.
64-pin (9x9 mm) QFN package