IT66121FN View Datasheet(PDF) - ITE Tech. INC.

Part Name

Description

Manufacturer

IT66121FN

Low Power Transmitter with HDMI1.4 3D

ITE Tech. INC. 

IT66121FN

Device

VCC

VSS

0.01uF Low ESL

VCC

Decoupling

Capacitor

Via to GND

3. Avoid placing the capacitor on the opposite side of the PC board from the HDMI IC.

4. It is recommended to add ferrite beads for analog powers. Ex. PVDD, PVCC, AVDD etc…

5. Shorter power loop makes better performance.

High Speed Digital Input/Output Signals(Both Data and Clocks)

1. To obtain good signal quality and avoid EMI issue, 4-layres PCB stacks are recommended.

2. Try to minimize the trace length that the digital outputs have to drive.

3. Keep these high speed signals refer to a continue GND or power plane, no GND or power slot

break the returning current path.

4. It’s recommended to add a series resistor of value 33 ohm to suppress reflections, reduce

EMI, and reduce the current spikes. These series resistors should be place as close to the

driving pins as possible.

5. If possible, try to place ITE’s RX/TX and related “Scalar IC” on the same PCB side and route

these high speed signals not to through vias to get the better signal quality.

6. The sensitive clock (PCLK) signals should be taken when routing. To reduce the crosstalk

effect, it is recommended to separate at least 2 times the maximum dielectric thickness

between the signal layer and the reference layer to any other adjacent signal to reduce noise

inference and jitter.

www.ite.com.tw

Nov-2011 Rev:0.99 38/39

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