PI6C3622-1 Datasheet, PDF (1/9 Pages) Pericom Semiconductor Corporation – Low Power Spread Spectrum Frequency Multiplier SSCG-GP Family

PI6C3622-1
Low Power Spread Spectrum Frequency Multiplier
SSCG-GP Family
Features
• 20 to 40MHz input frequency range
• 1x frequency multiplication
• Operating voltages of 2.5 V or 3.3V
• Selectable Spreading Ratio: ±0.30%, ±0.50%, ±0.70% and 0%
typical at 27MHz input
• Modulation Rate: Fin /640(20 MHz≤ Fin ≤40 MHz)
• Spread Spectrum feature can be enabled/disabled at run-time
and glitch-free
• Low power dissipation
• Low jitter
• 8-pin TSSOP Package
Applications
The PI6C3622-1 can be used in most multimedia applications
and embedded systems including but not limited to the
following:
• PDAs
• DSCs
• Printers/ MFPs
• Media players
• Portable-TVs
• Embedded digital video devices
• CD-ROM, VCD and DVD players
• LCD Panel Modules
• Automotive components
• Networking devices
Description
The PI6C3622-1 is a Low Power Spread Spectrum Frequency
Multiplier and part of the Pericom SSCG-GP family. The part
generates one 1x modulated output from a single clock source or
a crystal, and is designed to reduce electromagnetic interference
(EMI) by spreading the clock. This reduction in EMI can result
in significant system cost saving and less design complexity
by reducing the number of circuit board layers ferrite beads
and shielding. In the absence of a spread spectrum clock, other
EMI-reducing components are required in order to comply with
regulatory agency requirements.
The Spreading Ratio is selectable using the selection pins. The
PI6C3622-1 provides ±0.30%, ±0.50%, ±0.70% diversified and
0% spread modulation through external logic stage setting. The
Spread Spectrum feature can be enabled and disabled at run-
time by setting the SSON pin. Other pins should be properly set
before the system is initialized.
The chip is packaged in the 8-pin TSSOP. The reduced size of
the package outlines can save precious board space and make
layout easier.
PI6C3622-1 is one of the clock products provided by Pericom.
If your application needs a clock product with a different
specification not currently provided, please contact us for further
information or custom design.
Benefits
• Reduction in EMI
• System cost saving
• Reduced system complexity
• Faster time to market
Block Diagram
Pin Configuration
S1 S0
SSON
X1/CLKIN
X’TAL ^1/M
OSC
X2
PFD
/CP ^{LPF VCO}
Modulation
1/N
CLKOUT
1/K
X1
/CLKIN
GND
S1
SSON
8 Pin
TSSOP
X2
VDD
S0
CLKOUT
1
PS8944A 01/30/08