cx25870 Conexant Systems, Inc., cx25870 Datasheet - Page 157

• Manufacturer Part Number: cx25870
• Description: Video Encoder With Adaptive Flicker Filtering And Hdtv Output
• Manufacturer: Conexant Systems, Inc.

CX25870/871
Flicker-Free Video Encoder with Ultrascale Technology
Figure 3-15. System Block Diagram for Graphics Card with TV Out
3.6.4 Electrostatic Discharge and Latchup Considerations
100381B
NTSC/PAL/SECAM
Television or HDTV
VGA Monitor
Analog
RGB
Correct electrostatic discharge (ESD)-sensitive handling procedures are required
to prevent device damage. Device damage can produce symptoms of catastrophic
failure or erratic device behavior with leaky inputs.
specified tolerance. DAC power decoupling networks with large time constants
should be avoided; they could delay VAA and VDD power to the device. Ferrite
beads must be used only for analog power VAA decoupling. Inductors cause a
time-constant delay that induces latchup, and should not be substituted for a
ferrite bead.
same potential and by forcing all AGND and VSS pins to be at the same potential.
The VAA and VDD supply voltage must be applied before the signal pin voltages.
The correct power-up sequence ensures that any signal pin voltage will never
exceed the power supply voltage.
All logic inputs should be held low until power to the device has settled to the
Latchup can be prevented by ensuring that all VAA and VDD pins are at the
Outputs
DAC
Conexant VGA Encoder
CLKs
Analog RGB
Conexant
CX25871
Bt869
or
AGP Bus
SYNC*s
and
BLANK*
Controller
Graphics
AGP
Digital RGB
or
YCrCB Pixels
3.0 PC Board Considerations
3.6 Applications Information
or SDRAM*8
Flash ROM
SGRAM*8
Regulator
Graphics
Voltage
BIOS
100381_100
3-27