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April 2007 rev 0.2 Low Power Notebook LCD Panel EMI Reduction IC
Features
* FCC approved method of EMI attenuation * Generates a low EMI spread spectrum of the input clock frequency * Optimized for frequency range: P1727X: 20MHz to 40MHz * Internal loop filter minimizes external components and board space * 8 different frequency deviations ranging from +/-0.625% to -3.50% * Low inherent Cycle-to-cycle jitter * 3.3V Operating Voltage * Supports notebook VGA and other LCD timing controller applications * Available in 8 pin SOIC and TSSOP * Qualified for Industrial Temp Spec. (-40C to +85C)
P1727
significant system cost savings by reducing the number of circuit board layers and shielding that are traditionally required to pass EMI regulations. The P1727 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 result 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 P1727 uses the most efficient and optimized modulation profile approved by the FCC and is implemented by using a proprietary all-digital method.
Product Description
The P1727 is a versatile spread spectrum frequency modulator designed specifically for a wide range of clock frequencies. The P1727 reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream (clock and data dependent signals). The P1727 allows
Applications
The P1727 is targeted towards notebook LCD displays, other displays using an LVDS interface, PC peripheral devices and embedded systems.
Block Diagram
PDB
VDD
Modulation CLKIN Frequency Divider Feedback Divider
PLL
Phase Detector
Loop Filter
VCO
Output Divider
ModOUT
REFOUT
VSS
PulseCore Semiconductor 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.
April 2007 rev 0.2
Pin Configuration
CLKIN VDD VSS 1 2 3 8 7 6 5 PDB NC NC REFOUT
P1727
P1727
ModOUT 4
Table 1 - Power Down Selection PDB
0 1
Spread Spectrum
N/A ON
ModOUT
Disabled Normal
PLL
Disabled Normal
Mode
Power Down Normal
Table 2 Frequency Deviation Selection P/ N
P1727A P1727B P1727C P1727D
Deviation
-1.25% -1.75% -2.50% -3.50%
P/N
P1727E P1727F P1727G P1727H
Deviation
+/-0.625% +/-0.875% +/-1.25% +/-1.75%
Pin Description Pin#
1 2 3 4 5 6 7 8
Pin Name
CLKIN VDD VSS ModOUT REFOUT NC NC PDB
Type
I P P O O
Description
External reference frequency input. Connect to externally generated reference signal. Connect to +3.3V
Ground Connection. Connect to system ground.
Spread Spectrum Clock output
Reference output. No connect No connect
I
Powerdown Pin.Pull low to disable spread spectrum clock output.
Low Power Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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April 2007 rev 0.2
Schematic for notebook VGA application
P1727
27MHz Pixel Clock input VDD 0.1 F
1 2 3
CLKIN VDD VSS ModOUT
PDB 8 NC 7 NC 6 REFOUT 5
Tie low to enable Powerdown mode.
P1727
ModOut Clock
4
Reference Clock O/P
Absolute Maximum Ratings Symbol
VDD, VIN TSTG Ts TJ TDV Storage temperature Max. Soldering Temperature (10 sec) Junction Temperature Static Discharge Voltage (As per JEDEC STD22- A114-B)
Parameter
Voltage on any pin with respect to Ground
Rating
-0.5 to +7 -65 to +125 260 150 2
Unit
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.
Low Power Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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April 2007 rev 0.2
DC Electrical Characteristics Symbol
VIL VIH IIL IIH VOL VOH IDD ICC VDD tON ZOUT TA Input Low voltage Input High voltage Input Low current Input High current Output Low current Output High current VDD = 3.3V, IOL = 20mA VDD = 3.3V, IOH = 20mA 2.5 2 14 3.0 3.3 0.18 50 0 70 18 3.6
P1727
Parameter
Min
VSS - 0.3 2.0
Typ
Max
0.8 VDD +0.3 -35 35 0.4
Unit
V V A A V V mA mA V mS C
Static Supply Current (CLKIN, PDB pulled Low) Dynamic Supply Current (No Load) Operating Voltage Power up time (first locked clock cycle after power up) Clock Output impedance Operating temperature
AC Electrical Characteristics Symbol
fIN fOUT tLH1 tHL
1
Parameter
Input Frequency: Output Frequency Output Rise time Output Fall time Jitter (Cycle to cycle) Output Duty cycle P1727X P1727X Measured from 0.8V to 2.0V Measured from 2.0V to 0.8V
Min
20 20 0.7 0.6 45
Typ
Max
40 40
Unit
MHz MHz nS nS pS %
0.9 0.8 225 50
1.1 1.0 325 55
tJC tD
Note: 1. tLH and tHL are measured with a capacitive load of 15pF
Low Power Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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April 2007 rev 0.2
Package Information 8-lead (150-mil) SOIC Package
P1727
E
H
D
A2
A
e B A 1
C L
D
Dimensions
Symbol Min
A1 A A2 B C D E e H L
Inches Max
0.010 0.069 0.059 0.020 0.010 0.004 0.053 0.049 0.012 0.007
Millimeters Min Max
0.10 1.35 1.25 0.31 0.18 4.90 BSC 3.91 BSC 1.27 BSC 6.00 BSC 0.41 0 1.27 8 0.25 1.75 1.50 0.51 0.25
0.193 BSC 0.154 BSC 0.050 BSC 0.236 BSC 0.016 0 0.050 8
Low Power Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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April 2007 rev 0.2
P1727
8-lead Thin Shrunk Small Outline Package (4.40-MM Body)
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
Low Power Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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April 2007 rev 0.2
Ordering Information Part number
P1727AG-08ST P1727AG-08SR P1727AG-08TT P1727AG-08TR P1727BG-08ST P1727BG-08SR P1727BG-08TT P1727BG-08TR P1727CG-08ST P1727CG-08SR P1727CG-08TT P1727CG-08TR P1727DG-08ST P1727DG-08SR P1727DG-08TT P1727DG-08TR P1727EG-08ST P1727EG-08SR P1727EG-08TT P1727EG-08TR P1727FG-08ST P1727FG-08SR P1727FG-08TT P1727FG-08TR P1727GG-08ST P1727GG-08SR P1727GG-08TT P1727GG-08TR P1727HG-08ST P1727HG-08SR P1727HG-08TT P1727HG-08TR
P1727
Marking
P1727AG P1727AG P1727AG P1727AG P1727BG P1727BG P1727BG P1727BG P1727CG P1727CG P1727CG P1727CG P1727DG P1727DG P1727DG P1727DG P1727EG P1727EG P1727EG P1727EG P1727FG P1727FG P1727FG P1727FG P1727GG P1727GG P1727GG P1727GG P1727HG P1727HG P1727HG P1727HG
Package Configuration
8 PIN SOIC, TUBE, Green 8 PIN SOIC, TAPE & REEL, Green 8 PIN TSSOP, TUBE, Green 8 PIN TSSOP, TAPE & REEL, Green 8 PIN SOIC, TUBE, Green 8 PIN SOIC, TAPE & REEL, Green 8 PIN TSSOP, TUBE, Green 8 PIN TSSOP, TAPE & REEL, Green 8 PIN SOIC, TUBE, Green 8 PIN SOIC, TAPE & REEL, Green 8 PIN TSSOP, TUBE, Green 8 PIN TSSOP, TAPE & REEL, Green 8 PIN SOIC, TUBE, Green 8 PIN SOIC, TAPE & REEL, Green 8 PIN TSSOP, TUBE, Green 8 PIN TSSOP, TAPE & REEL, Green 8 PIN SOIC, TUBE, Green 8 PIN SOIC, TAPE & REEL, Green 8 PIN TSSOP, TUBE, Green 8 PIN TSSOP, TAPE & REEL, Green 8 PIN SOIC, TUBE, Green 8 PIN SOIC, TAPE & REEL, Green 8 PIN TSSOP, TUBE, Green 8 PIN TSSOP, TAPE & REEL, Green 8 PIN SOIC, TUBE, Green 8 PIN SOIC, TAPE & REEL, Green 8 PIN TSSOP, TUBE, Green 8 PIN TSSOP, TAPE & REEL, Green 8 PIN SOIC, TUBE, Green 8 PIN SOIC, TAPE & REEL, Green 8 PIN TSSOP, TUBE, Green 8 PIN TSSOP, TAPE & REEL, Green
Temperature Range
Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial
Low Power Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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April 2007 rev 0.2
Device Ordering Information
P1727
P1727X
G
08-XX
SR - SOIC, T/R TT - TSSOP, TUBE TR - TSSOP, T/R ST - SOIC, TUBE Pin Count F = LEAD FREE AND RoHS COMPLIANT PART G = GREEN PACKAGE, LEAD FREE, and RoHS Deviation (%) and Spread option Identifier DEVICE NUMBER Flow: P = Commercial Temperature Range (0C to 70C) I = Industrial Temperature Range (-40C to 85C)
Licensed under US patent #5,488,627, #6,646,463 and #5,631,920.
Low Power Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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April 2007 rev 0.2
P1727
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: P1727 Document Version: 0.2
Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003
(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.
Low Power Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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