
Alliance Semiconductor
Product Description
The P1707A is a versatile spread spectrum frequency modulator designed specifically for input clock frequencies. The P1707A reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream clock and data dependent signals. The P1707A allows significant system cost savings by reducing the number of circuit board layers ferrite beads, shielding and other passive components that are traditionally required to pass EMI regulations.
FEATUREs
• FCC approved method of EMI attenuation.
• Generates a low EMI spread spectrum clock of the
input frequency.
• Optimized for frequency range from 60 to 175MHz.
• Internal loop filter minimizes external components
and board space.
• Four selectable spread ranges.
• Low inherent cycle-to-cycle jitter.
• 3.3V operating voltage range.
• TTL or CMOS compatible inputs and outputs.
• Ultra-low power CMOS design.
• 14.85 mA @3.3V, 140MHz
• 16.69mA @3.3V, 162MHz
• 17.78 mA @3.3V, 175MHz
• Supports notebook VGA and other LCD timing
controller applications.
• Pinout compatible to ICS MK1707 and Cypress
CY25561/CY25560.
• SSON/SBM pin for Spread Spectrum On/Off
and Standby Mode controls.
• Available in 8-pin SOIC and TSSOP.
APPLICATIONs
The P1707A is targeted towards notebook LCD displays,
and other displays using an LVDS interface, PC peripheral
devices, and embedded systems.