P2560B-08ST ALSC [Alliance Semiconductor Corporation], P2560B-08ST Datasheet

no-image

P2560B-08ST

Manufacturer Part Number
P2560B-08ST
Description
Low Frequency EMI Reduction
Manufacturer
ALSC [Alliance Semiconductor Corporation]
Datasheet
November 2003
rev 1.0
Features
Product Description
The P2560B is a versatile spread spectrum frequency
modulator designed specifically for a wide range of clock
frequencies. It reduces electromagnetic interference
Block Diagram
2575, Augustine Drive • Santa Clara, CA • Tel: 408.855.4900 • Fax: 408.855.4999 • www.alsc.com
FCC approved method of EMI attenuation
Generates a low EMI spread spectrum and a non-
spread reference signal of the input clock
frequency
Optimized for input frequency range from 20 to 32
MHz
Internal loop filter minimizes external components
and board space
Two selectable spread ranges
Low inherent cycle-to-cycle jitter
3.3 V or 5 V operating voltage
CMOS/TTL compatible inputs and outputs
Ultra low power CMOS design: 5.50 mA @3.3 V
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
Notice: The information in this document is subject to change without notice.
Alliance Semiconductor
(EMI) at the clock source allowing system-wide reduction
of EMI of downstream clock and data dependent signals.
It allows significant system cost savings by reducing the
number of circuit board layers and shielding traditionally
required to pass EMI regulations.
The P2560B modulates the output of a single PLL in
order to spread the bandwidth of a synthesized clock,
thereby decreasing 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 clock generators. Lowering EMI by increasing
a signal’s bandwidth is called spread spectrum clock
generation.
The P2560B uses the most efficient and optimized
modulation profile approved by the FCC and is
implemented by using a proprietary all-digital method.
Applications
The P2560B is targeted toward the notebook VGA chip
and other displays using an LVDS interface, PC
peripheral devices, and embedded systems
P2560B

Related parts for P2560B-08ST

P2560B-08ST Summary of contents

Page 1

... It allows significant system cost savings by reducing the number of circuit board layers and shielding traditionally required to pass EMI regulations. The P2560B modulates the output of a single PLL in order to spread the bandwidth of a synthesized clock, thereby decreasing 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 clock generators ...

Page 2

... Notice: The information in this document is subject to change without notice. P2560B ModOUT N/A Disabled Disabled N/A Disabled running Off Reference Disabled On Normal Normal Spreading range ±1.16% ±1.13% ±1.11% ±1.0% ±1.0% Description Low Frequency EMI Reduction P2560B PLL Mode Standby Free Free running Buffer out Normal Modulation rate (CLKIN/10) * 20.83 kHz ...

Page 3

... November 2003 rev 1.0 Schematic for Notebook VGA Application Notice: The information in this document is subject to change without notice. P2560B Low Frequency EMI Reduction P2560B ...

Page 4

... V and 10 pF loading 3.2 5.0 V and 10 pF loading 6.2 2.7 – – Min 20 20 Measured at 0 2.0 V 0.7 Measured at 1 3.75 V – Measured at 2 0.8 V 0.6 Measured at 1 3.75 V – – 45 Low Frequency EMI Reduction P2560B Unit V ° C ° C Typ Max Unit – 0.8 V – VDD + 0.3 V – -35 µA – 35 µA 3 – ...

Page 5

... A 0.002 A1 0.031 A2 0.007 B 0.004 C 0.114 D 0.169 E 0.026 e 0.244 H 0.018 L 0° a Note: Controlling dimensions are millimeters. TSSOP - 0.034 grams unit weight Low Frequency EMI Reduction P2560B INCHES MILLIMETERS NOR MAX MIN NOR MAX 0.064 0.071 1.45 1.63 1.80 0.007 0.010 0.10 0.18 0.25 0.061 0.069 1.35 1.55 1.75 0.016 0.020 ...

Page 6

... November 2003 rev 1.0 Ordering Information X 2560B Examples Ordering Code Package Type P2560B-08ST 8-pin 150mil SOIC I2560B-08SR 8-pin SOIC T&R P2560BF-08ST 8-pin TSSOP Tube I2560BF-08SR 8-pin TSSOP T&R Notice: The information in this document is subject to change without notice. Package: ST: SOIC in TUBE SR: SOIC in TAPE & REEL TT: TSSOP in TUBE TR: TSSOP in TAPE & ...

Page 7

... Alliance against all claims arising from such use. Notice: The information in this document is subject to change without notice. Copyright © Alliance Semiconductor All Rights Reserved Preliminary Information Part Number: P2560B Document Version: v1.0 Low Frequency EMI Reduction P2560B ...

Related keywords