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P1817B, P1817BF, P1817BF-08ST

Table of contents:
Info of P1817B
Info of P1817BF
Info of P1817BF-08ST

P1817B, P1817BF, P1817BF-08ST Selling Leads, Datasheet

MFG:ALLIANCE Package Cooled:N/A D/C:09+

P1817B, P1817BF, P1817BF-08ST Datasheet download

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Part Number: P1817B

MFG: ALLIANCE

Package Cooled: N/A

D/C: 09+

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P1817B General Description

The P1817 is a versatile spread spectrum frequency modulator designed specifically for input clock frequencies.The P1817 reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream clock and data dependent signals. The P1817 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.

The P1817 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 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'.

The P1817 uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all digital method.

P1817B Maximum Ratings

Symbol	Parameter	Rating	Unit
V_DD,V_IN	Voltage on any pin with respect to GND	-0.5 to + 7.0	V
T_STG	Storage temperature	-65 to +125	°C
T_A	Operating temperature	0 to 70	°C

Note: These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for extended periods may affect device reliability.

P1817B Features

`FCC approved method of EMI attenuation.
`Generates a low EMI spread spectrum clock of the input frequency.
`Optimized for frequency range from:
o P1817A 20 to 30MHz. Operation
o P1817B 10 to 20MHz Operation
`Internal loop filter minimizes external components and board space.
`Two selectable spread ranges.
`Low inherent cycle-to-cycle jitter.
`3.3V or 5V operating voltage range.
`TTL or CMOS compatible outputs.
`Ultra-low power CMOS design.
`3.17mA @3.3V, 10MHz | 6.20mA@5.0V, 10MHz
`4.28mA @3.3V, 14MHz | 7.50mA @5.0V, 14MHz
`5.50mA @3.3V, 20MHz | 9.50mA @5.0V, 20MHz
`Supports notebook VGA and other LCD timing controller applications.
`SSON pin for Spread Spectrum On/Off and Standby Mode controls.
`Available in 8-pin SOIC and TSSOP

P1817B Typical Application

The P1817 is targeted towards notebook VGA chip and other displays using an LVDS interface, PC peripheral devices, and embedded systems.

P1817B Connection Diagram

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