748
-0
00
9
Low Spread LCD Panel EMI Reduction IC
FEATURES
Provides up to 20 dB of EMI suppression
FCC approved method of EMI attenuation
Generates a low EMI spread spectrum clock
of the input frequency
40 MHz to 85 MHz input frequency range
Optimized for VGA, SVGA and high resolution
XGA LCD panels
Internal loop filter minimizes external
components and board space
6 selectable low spread ranges, under +/- 1%
SSON control pin for spread spectrum enable
and disable options
PRODUCT DESCRIPTION
The P2065 is a selectable spread spectrum
frequency modulator designed specifically for
digital flat panel applications. The P2065
reduces electromagnetic interference (EMI) at
the clock source which provides system wide
reduction of EMI of all clock dependent signals.
The P2065 allows significant system cost
savings by reducing the number of circuit board
layers and shielding that are traditionally
required to pass EMI regulations.
The P2065 uses the most efficient and
optimized modulation profile approved by the
FCC and is implemented in a proprietary all-
digital method.
The P2065 modulates the output of a single PLL
in order to “spread” the bandwidth of a
synthesized clock and, more importantly,
decreases the peak amplitudes of its harmonics.
This results in significantly lower system EMI
2 selectable modulation rates
Low cycle-to-cycle jitter
3.3V or 5.0 V operating range
16 mA output drives
TTL or CMOS compatible outputs
Low power CMOS design
Supports most mobile graphic accelerator
specifications
Available in 8 pin SOIC and TSSOP
compared to the typical narrow band signal
produced by oscillators and most frequency
generators. Lowering EMI by increasing a
signal’s bandwidth is called “spread spectrum
clock generation”.
APPLICATIONS
The P2065 is targeted towards digital flat panel
applications for Notebook PCs, Palm-size PCs,
Office Automation Equipments, and LCD
Monitors.
Figure 1 – P2065 Pin Diagram
1 8
2 7
3 6
4 5
CLKIN
MRA
SR1
VSS
VDD
SR0
ModOUT
SSON