Generates optimized clock signal output. Input frequency: MHz. Frequen

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Generates optimized clock signal output. Input frequency: MHz. Frequen

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Peak Reducing Solution
Generates optimized clock signal output. Input frequency: MHz. Frequency outputs: Clock unmodulated) (modulated), centre spread
ASM3P2853A
shielding that required pass regulations. ASM3P2853A modulates output order spread bandwidth synthesized clock, thereby decreasing peak amplitudes harmonics. This results significantly lower system compared typical narrow band signal produced oscillators most clock generators. Lowering increasing signal's bandwidth called spread spectrum clock generation.
Modulation rate: KHz. Spread Spectrum ON/OFF control Supply voltage range 2.5V Available 8-pin SOIC package. Commercial Temperature range.
Applications
ASM3P2853A targeted towards management high speed digital applications such peripheral devices, consumer electronics embedded controller systems.
Product Description
ASM3P2853A versatile spread spectrum frequency modulator. ASM3P2853A reduces electromagnetic interference (EMI) clock source. ASM3P2853A allows significant system cost savings reducing number circuit board layers
Block Diagram
PWDNB
XOUT
Crystal Oscillator
PLL1
Clock Unmodulated) Modulated
SSONB
PLL2
Alliance Semiconductor 2575 Augustine Drive Santa Clara Tel: 408-855-4900 Fax: 408-855-4999 www.alsc.com
Configuration
ASM3P2853A
XOUT
Clock SSONB PWDNB
ASM3P2853A
Description Name
Type
Description
Connection crystal external reference frequency input. This dual functions. connected either external crystal external reference clock. Connection crystal. using external reference clock, this must left unconnected. Power supply analog digital blocks Ground entire chip. Power-down control pin. Pull enable power-down mode. Connect VDD, used. Digital logic input used enable spread spectrum function (Active LOW). Spread spectrum enabled when LOW, disabled when HIGH. Clock output unmodulated) Clock output modulated)
XOUT PWDNB SSONB Clock
Peak Reducing Solution
Absolute Maximum Ratings Symbol
Input voltage, Output voltage, Input clamp current (VI<0 VI>VDD) Output clamp current (VI<0 VI>VDD) Junction temperature Lead temperature (soldering sec) Input static discharge voltage protection (MIL -STD 883E, Method 3015.7)
reliability.
ASM3P2853A
Parameter
Supply voltage,
Rating
(VSS 0.5) (VSS-0.5) (VDD+0.5) (VSS-0.5) (VDD 0.5)
Unit
Note: These stress ratings only functional operation implied. Exposure absolute maximum ratings extended periods affect device
Operating Conditions Parameter
Supply Voltage Ambient Operating Temperature Range Crystal Resonator Frequency Output Driver Load Capacitance FXIN
Symbol
Condition Description
2.5V
2.375
2.625
Unit
Crystal Specifications
Fundamental parallel resonant crystal Nominal frequency Frequency tolerance Operating temperature range Storage temperature Load capacitance Shunt capacitance better 25°C -25°C +85°C -40°C +85°C 18pF maximum
Peak Reducing Solution
Electrical Characteristics Parameter Overall
Supply Current, Dynamic Supply Current, Static IDDL VDD=2.5V, FXIN=25MHz, CL=15pF 2.5V, PWDNB
ASM3P2853A
Symbol
Conditions Description
Unit
input pins
High-Level Input Voltage Low-Level Input Voltage High-Level Input Current Low-Level Input Current (pull-up) VDD=2.5V VDD=2.5V
Clock Outputs
High-Level Output Source Current Low-Level Output Sink Current High-Level Output Source Current Low-Level Output Sink Current IxOH IxOL VDD= 2.5V ,V(XIN) VO=2V VDD= V(XIN) =2.5V, VO=0.4V VO=2V VO=0.4V
Output Impedance
Peak Reducing Solution
Electrical Characteristics Parameter
Rise Time*
ASM3P2853A
Symbol
level
Conditions/ Description
Measured from signal
Unit
Measured from signal Fall Time* Jitter (Cycle Cycle) Jitter (Period) Clock Duty Cycle Ratio pulse width measured from rising edge next falling edge VDD/2) clock period level
Input clock frequency
Peak Reducing Solution
Package Information
ASM3P2853A
8-Pin SOIC package
Dimensions Symbol
0.004 0.053 0.049 0.012 0.007
Inches
0.010 0.069 0.059 0.020 0.010
Millimeters
0.10 1.35 1.25 0.31 0.18 4.90 3.91 1.27 6.00 0.41 1.27
0.25 1.75 1.50 0.51 0.25
0.193 0.154 0.050 0.236 0.016 0.050
Peak Reducing Solution
Ordering Codes Part number
ASM3P2853AF-08-ST ASM3P2853AF-08-SR
ASM3P2853A
Package Configuration
8-pin SOIC ,TUBE 8-pin SOIC, TAPE REEL
Temperature Range
Commercial Commercial
Ordering Information
SOT23/T/R TSSOP, TUBE TSSOP, QFN, TUBE BGA, TUBE BGA,
SOIC, TUBE SOIC, QFN, TVSOP, TUBE TVSOP, SSOP, SSOP, TUBE
COUNT
FREE
PART NUMBER
Automotive (-40C +125C)
Industrial (-40C +85C)
Commercial +70C)
reserved based Reduction support products
power management power management power management performance
Alliance Semiconductor Mixed Signal Product
Licensed under patent #5,488,627, #6,646,463 #5,631,920.
Peak Reducing Solution
ASM3P2853A
Alliance Semiconductor Corporation 2575, Augustine Drive, Santa Clara, 95054 Tel# 408-855-4900 Fax: 408-855-4999 www.alsc.com
Copyright Alliance Semiconductor Rights Reserved Preliminary Information Part Number: ASM3P2853A Document Version: v0.7
Note: This product utilizes Patent 6,646,463 Impedance Emulator Patent issued Alliance Semiconductor, dated 11-11-2003
Copyright 2003 Alliance Semiconductor Corporation. rights reserved. three-point logo, name Intelliwatt trademarks registered trademarks Alliance. other brand product names trademarks their respective companies. Alliance reserves right make changes this document products time without notice. Alliance assumes responsibility errors that appear this document. data contained herein represents Alliance's best data and/or estimates time issuance. Alliance reserves right change correct this data time, without notice. product described herein under development, significant changes these specifications possible. information this product data sheet intended general descriptive information potential customers users, intended operate provide, guarantee warrantee user customer. Alliance does assume responsibility liability arising application product described herein, disclaims express implied warranties related sale and/or Alliance products including liability warranties related fitness particular purpose, merchantability, infringement intellectual property rights, except express agreed Alliance's Terms Conditions Sale (which available from Alliance). sales Alliance products made exclusively according Alliance's Terms Conditions Sale. purchase products from Alliance does convey license under patent rights, copyrights; mask works rights, trademarks, other intellectual property rights Alliance third parties. Alliance does authorize products critical components life-supporting systems where malfunction failure reasonably expected result significant injury user, inclusion Alliance products such life-supporting systems implies that manufacturer assumes risk such agrees indemnify Alliance against claims arising from such use.
Peak Reducing Solution

Generates optimized clock signal output. Input frequency: MHz. Frequen

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