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May 2008
rev 0.2 Spread Spectrum Clock Generator
Product Description Features
* * * * * * * * *
PCS3P2189A
Generates a 4X low EMI spread spectrum clock of the input frequency. Input frequency: 10MHz - 25MHz Output frequency: 40MHz - 100MHz Internal loop filter minimizes external components and board space. Selectable Centre Spread frequency deviation: 0.5%, 1.0%, 1.5%, 2.0% Supply Voltage :3.3V 0.3V Commercial and Industrial temperature range 8-pin TSSOP Package Low power CMOS process
PCS3P2189A is a versatile spread spectrum frequency modulator that generates a low EMI 4x clock at the output. PCS3P2189A offers four spread Spread options of Deviation Selection selectable centre PCS3P2189A all 0.5%,1.0%,1.5%,2.0%,(Refer Tabnle).
reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of clock dependent signals. The PCS3P2189A allows
significant system cost savings by reducing the number of circuit board layers, ferrite beads, and shielding that are traditionally required to pass EMI regulations. PCS3P2189A has spread spectrum ON/OFF option. The PCS3P2189A uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all digital method.
Application
PCS3P2189A is targetted for LCD panel application
Block Diagram
S0 S1 SSON VDD
PLL Modulation CLKIN / XIN XOUT
Crystal Oscillator
Frequency Divider Feedback Divider
Phase Detector
Loop Filter
VCO
Output Divider
ModOUT
VSS
PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200, Campbell, CA 95008 * Tel: 408-879-9077 * Fax: 408-879-9018 www.pulsecoresemi.com
Notice: The information in this document is subject to change without notice.
May 2008 rev 0.2
Pin Configuration
PCS3P2189A
CLKIN / XIN 1 XOUT 2
8 7
VDD ModOUT VSS S0
PCS3P2189A
SSON 3 S1 4
6 5
Pin Description Pin#
1 2 3 4 5 6 7 8
Pin Name
CLKIN / XIN XOUT SSON S1 S0 VSS ModOUT VDD
Type
I O I I O P O P
Description
Crystal connection or External reference Clock Input Crystal connection. If using an external reference, this pin must be left unconnected. Modulation enables pin. When HIGH enables spread spectrum modulation. Has an Internal pull up resistor Spread range select. Digital logic input used to select frequency deviation (Refer Spread Deviation Table). This pin has an internal pull-up resistor. Spread range select. Digital logic input used to select frequency deviation (Refer Spread Deviation Table). This pin has an internal pull-up resistor. Ground Connection. Connect to system ground. Low EMI 4x clock output. Power Supply Voltage Pin. Connect to +3.3V.
Spread Deviation Selection Table
(For an Input CLK=15MHz)
S1
0 0 1 1
S0
0 1 0 1
Deviation ( %)
0.5 1.0 1.5 2.0
Modulation Enable Setting Table SSON
L H
Modulation
No Modulation Modulation
Spread Spectrum Clock Generator
Notice: The information in this document is subject to change without notice.
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May 2008 rev 0.2
Absolute Maximum Ratings Symbol
VDD VIN VOUT TSTG Ts TJ TDV
PCS3P2189A
Parameter
Supply Voltage pin with respect to Ground Input Voltage pin with respect to Ground Output Voltage pin with respect to Ground Storage temperature Max. Soldering Temperature (10 sec) Junction Temperature Static Discharge Voltage(As per JEDEC STD22- A114-B)
Rating
-0.5 to +4.6 VSS-0.5 to VDD+0.5 VSS-0.5 to VDD+0.5 -55 to +125 260 150 2
Unit
V V V C C C KV
Note: These are stress ratings only and are not implied for functional use. Exposure to absolute maximum ratings for prolonged periods of time may affect device reliability.
DC Electrical Characteristics Symbol
VIL VIH IIL IIH VOL VOH ICC IDD VDD tON ZOUT CIN CL Input low voltage Input high voltage Input low current Input high current Output low voltage Output high voltage IOL = 4mA IOH = -4mA VSS 2.4 7 14
Parameter
Min
VSS - 0.3 2.0
Typ
Max
0.8 VDD+ 0.3 -50 +50 0.4 VDD 20 6
Unit
V V A A V V mA mA V mS pF
Dynamic supply current (Unloaded Output) Static supply current standby, CLKIN/XIN pulled LOW Operating voltage Power up time (first locked clock cycle after power up) Clock output impedance Input Capacitance Load Capacitance
3.0
3.3 2 50 5
3.6 5
15
pF
Spread Spectrum Clock Generator
Notice: The information in this document is subject to change without notice.
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May 2008 rev 0.2
AC Electrical Characteristics Symbol
XIN/CLKIN ModOUT MF tLH* tHL* tJC tJP tD
PCS3P2189A
Parameter
Input Clock frequency Output Modulated Clock frequency Modulation Frequency Output rise time ( Measured from 20% to 80% ) Output fall time ( Measured from 80% to 20% ) Cycle to Cycle Jitter Period Jitter (With SSOFF) Output duty cycle
Min
10 40 26
Typ
15 60 39 2 1.5 250 200
Max
25 100 65 2.5 2 325 250 55
Unit
MHz MHz KHz nS nS pS %
45
50
*tLH and tHL are measured with a capacitive load of 15pF
Typical Crystal Oscillator Circuit
R1 = 510
C1
C2
Typical Crystal Specifications
Fundamental AT cut parallel resonant crystal Nominal frequency Frequency tolerance Operating temperature range Storage temperature Load capacitance Shunt capacitance ESR 15MHz 50 ppm or better at 25C -25C to +85C -40C to +85C 18pF 7pF maximum 25
Spread Spectrum Clock Generator
Notice: The information in this document is subject to change without notice.
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May 2008 rev 0.2
Package Information
PCS3P2189A
Mechanical Package Outline 8-Pin TSSOP
H
E D A2 A e B A1 L C
Dimensions Symbol Min
A A1 A2 B c D E e H L 0.020 0 0.002 0.033 0.008 0.004 0.114 0.169 0.026 BSC 0.252 BSC 0.028 8 0.50 0
Inches Max
0.043 0.006 0.037 0.012 0.008 0.122 0.177 0.05 0.85 0.19 0.09 2.90 4.30
Millimeters Min Max
1.10 0.15 0.95 0.30 0.20 3.10 4.50 0.65 BSC 6.40 BSC 0.70 8
Note: Controlling dimensions are millimeters TSSOP - 0.034 grams unit weight
Spread Spectrum Clock Generator
Notice: The information in this document is subject to change without notice.
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May 2008 rev 0.2
Ordering Code Part Number
PCS3P2189AG-08TT PCS3P2189AG-08TR PCS3I2189AG-08TT PCS3I2189AG-08TR
PCS3P2189A
Marking
3P2189AG 3P2189AG 3I2189AG 3I2189AG
Package Type
8-Pin TSSOP, TUBE, Green 8-Pin TSSOP, TAPE & REEL, Green 8-Pin TSSOP, TUBE, Green 8-Pin TSSOP, TAPE & REEL, Green
Temperature
Commercial Commercial Industrial Industrial
Device Ordering Information
PCS3P2189AG-08TR
R = Tape & Reel, T = Tube or Tray O = SOT S = SOIC T = TSSOP A = SSOP V = TVSOP B = BGA Q = QFN DEVICE PIN COUNT U = MSOP E = TQFP L = LQFP U = MSOP P = PDIP D = QSOP X = SC-70
G = GREEN PACKAGE, LEAD FREE, and RoHS PART NUMBER X= Automotive I= Industrial P or n/c = Commercial (-40C to +125C) (-40C to +85C) (0C to +70C) 1 = Clock Generator 2 = Non PLL based 3 = EMI Reduction 4 = DDR support products 5 = STD Zero Delay Buffer 6 = Power Management 7 = Power Management 8 = Power Management 9 = Hi Performance 0 = Reserved
PulseCore Semiconductor Mixed Signal Product
Licensed under U.S Patent Nos 5,488,627 and 5,631,921
Spread Spectrum Clock Generator
Notice: The information in this document is subject to change without notice.
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May 2008 rev 0.2
PCS3P2189A
PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200 Campbell, CA 95008 Tel: 408-879-9077 Fax: 408-879-9018 www.pulsecoresemi.com
Copyright (c) PulseCore Semiconductor All Rights Reserved Part Number: PCS3P2189A Document Version: 0.2
Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003 Many PulseCore Semiconductor products are protected by issued patents or by applications for patent
(c) Copyright 2006 PulseCore Semiconductor Corporation. All rights reserved. Our logo and name are trademarks or registered trademarks of PulseCore Semiconductor. All other brand and product names may be the trademarks of their respective companies. PulseCore reserves the right to make changes to this document and its products at any time without notice. PulseCore assumes no responsibility for any errors that may appear in this document. The data contained herein represents PulseCore's best data and/or estimates at the time of issuance. PulseCore reserves the right to change or correct this data at any time, without notice. If the product described herein is under development, significant changes to these specifications are possible. The information in this product data sheet is intended to be general descriptive information for potential customers and users, and is not intended to operate as, or provide, any guarantee or warrantee to any user or customer. PulseCore does not assume any responsibility or liability arising out of the application or use of any product described herein, and disclaims any express or implied warranties related to the sale and/or use of PulseCore products including liability or warranties related to fitness for a particular purpose, merchantability, or infringement of any intellectual property rights, except as express agreed to in PulseCore's Terms and Conditions of Sale (which are available from PulseCore). All sales of PulseCore products are made exclusively according to PulseCore's Terms and Conditions of Sale. The purchase of products from PulseCore does not convey a license under any patent rights, copyrights; mask works rights, trademarks, or any other intellectual property rights of PulseCore or third parties. PulseCore does not authorize its products for use as critical components in life-supporting systems where a malfunction or failure may reasonably be expected to result in significant injury to the user, and the inclusion of PulseCore products in such life-supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify PulseCore against all claims arising from such use.
Spread Spectrum Clock Generator
Notice: The information in this document is subject to change without notice.
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