ASM3P2856B PulseCore Semiconductor, ASM3P2856B Datasheet

no-image

ASM3P2856B

Manufacturer Part Number
ASM3P2856B
Description
Custom Clock generator
Manufacturer
PulseCore Semiconductor
Datasheet
November 2006
rev0.1
Block Diagram
Features
1715 S. Bascom Ave Suite 200 Campbell, CA 95008 • Tel: 408-879-9077 • Fax: 408-879-9018
Custom Clock Generator for LCD Projector
Generates EMI optimized clock signals for
LCD Projector system
Uses an inexpensive 14.7456 MHz crystal for
generating the required Outputs
Frequency outputs:
Supply voltage range 3.3V ± 0.3V.
Available in 16 Pin TSSOP
Available in Commercial Temperature range
XOUT
CLK1 : 27.002MHz
CLK2 : 14.7456MHz (Zero ppm)
CLK3 : 65MHz (± 15 ppm)
CLK4,CLK5 : 65MHz (±15 ppm) Spread
Spectrum Clock
ASM3P2856A: +/- 1% centre spread
ASM3P2856B: selectable +/-1.0% & +/-1.5%
Centre Spread option
XIN
Notice: The information in this document is subject to change without notice.
Oscillator
Crystal
Custom Clock generator for LCD Projector
(± 20 ppm)
PulseCore Semiconductor Corporation
www.pulsecoresemi.com
GND
V
DD
SSON SS%
Product Description
ASM3P2856A/B generate the required four custom clock
frequencies for the LCD Projector. An inexpensive
14.7456MHz crystal is used to generate a 14.7456MHz
used by the microcomputer, a 27MHz used by Video, a
non-spread 65MHz, and a centre spread 65MHz clock used
by the LCD projector system. The spread spectrum clock
has +/- 0.5% or +/- 1% spread options.
spectrum clock of ASM3P2856A/B reduces electromagnetic
interference (EMI) at the clock source. This allows
significant system cost savings by reducing the number of
circuit board layers and shielding that are required to pass
EMI regulations.
Applications
ASM3P2856A/B is targeted for use in LCD Projectors.
PLL
ASM3P2856A
ASM3P2856B
CLK1
CLK2
CLK3
CLK4
CLK5
www.DataSheet4U.com
The spread

Related parts for ASM3P2856B

ASM3P2856B Summary of contents

Page 1

... CLK2 : 14.7456MHz (Zero ppm) • CLK3 : 65MHz (± 15 ppm) • CLK4,CLK5 : 65MHz (±15 ppm) Spread Spectrum Clock • ASM3P2856A: +/- 1% centre spread ASM3P2856B: selectable +/-1.0% & +/-1.5% Centre Spread option • Supply voltage range 3.3V ± 0.3V. • Available in 16 Pin TSSOP • Available in Commercial Temperature range ...

Page 2

... MHz Spread Spectrum Clock Output. Refer to Input & Output Frequency Table for details. No Connection for ASM3P2856A Spread percentage selection pin for ASM3P2856B. Refer to Spread Selection Table for details. Has an internal pull down resistor No Connection for ASM3P2856A Spread spectrum selection. When SSON is HIGH, spread spectrum is enabled and when LOW, it turns off the spread spectrum ...

Page 3

... GND CLK5 6 11 CLK1 CLK4 7 10 CLK2 8 CLK3 9 www.DataSheet4U.com ASM3P2856A ASM3P2856B Frequency Accuracy of synthesized clocks ±20 ppm Zero ppm ±15 ppm ±15 ppm ±15 ppm + 3.3V Make SSON Pin HIGH to enable Spread Spectrum SS% Pin selects different Spread deviations 65MHz SS Clock 65MHz SS Clock ...

Page 4

... Custom Clock generator for LCD Project Notice: The information in this document is subject to change without notice. Parameter Min GND - 0.3 2 @0.4V, VDD=3.3V) - XOL @2.5V, VDD=3.3V) - XOH = 10mA 10mA www.DataSheet4U.com ASM3P2856A ASM3P2856B Rating Unit -0.5 to +4.6 V -0.5 to VDD+0.5 -65 to +125 ° °C 260 °C 150 ° Typ Max Unit - 0 VDD + 0 -35 µ ...

Page 5

... LH HL Custom Clock generator for LCD Project Notice: The information in this document is subject to change without notice. Parameter Min CLK1 CLK2 CLK3 CLK4 (SS Clock ) CLK5 (SS Clock ) For SS For SS www.DataSheet4U.com ASM3P2856A ASM3P2856B Typ Max Unit - 14.7456 - MHz - 27.002 - - 14.7456 - - 65 ...

Page 6

... Seating Plane Dimensions Inches Min Max Min 0.043 0.002 0.006 0.05 0.031 0.041 0.80 0.007 0.012 0.19 0.004 0.008 0.09 0.193 0.201 4.90 0.169 0.177 4.30 0.026 BSC 0.252 BSC 0.020 0.030 0.50 0° 8° 0° www.DataSheet4U.com ASM3P2856A ASM3P2856B C θ L Millimeters Max 1.20 0.15 1.05 0.30 0.20 5.10 4.50 0.65 BSC 6.40 BSC 0.75 8° ...

Page 7

... G = GREEN PACKAGE, LEAD FREE, and RoHS DEVICE NUMBER X= Automotive (-40C to +125C Reserved 2 = Non PLL based 3 = EMI Reduction 4 = DDR support products 5 = STD Zero Delay Buffer PulseCore Semiconductor Mixed Signal Product www.DataSheet4U.com ASM3P2856A ASM3P2856B Operating Range Commercial Commercial Commercial Commercial U = MSOP E = TQFP L = LQFP U = MSOP P = PDIP D = QSOP ...

Page 8

... PulseCore against all claims arising from such use. Custom Clock generator for LCD Project Notice: The information in this document is subject to change without notice. www.DataSheet4U.com ASM3P2856A ASM3P2856B Copyright © PulseCore Semiconductor All Rights Reserved Preliminary Information Part Number: ASM3P2856A ASM3P2856B Document Version: v0 ...

Related keywords