P2040CF-08TT [ALSC]

LCD Panel EMI Reduction IC; 液晶面板降低EMI IC
P2040CF-08TT
型号: P2040CF-08TT
厂家: ALLIANCE SEMICONDUCTOR CORPORATION    ALLIANCE SEMICONDUCTOR CORPORATION
描述:

LCD Panel EMI Reduction IC
液晶面板降低EMI IC

CD
文件: 总9页 (文件大小:159K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
September 2005  
rev 1.4  
P2040C  
LCD Panel EMI Reduction IC  
Features  
system wide reduction of EMI of all clock dependent  
signals. The P2040C allows significant system cost  
savings by reducing the number of circuit board layers and  
shielding that are traditionally required to pass EMI  
regulations.  
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FCC approved method of EMI attenuation.  
Provides up to 15dB of EMI suppression  
Generates a low EMI spread spectrum clock of the  
input frequency  
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50MHz to 170MHz input frequency range  
Optimized for 54MHz, 65MHz, 81MHz, 140MHz,  
and 162MHz pixel clock frequencies  
Internal loop filter minimizes external components  
and board space  
8 selectable spread ranges, up to ± 2.2%  
SSON# control pin for spread spectrum enable and  
disable options  
2 selectable modulation rates  
Low Cycle-to-cycle jitter  
3.3V Operating Voltage  
Ultra low power CMOS design  
The P2040C uses the most efficient and optimized  
modulation profile approved by the FCC and is  
implemented in a proprietary all-digital method. The  
P2040C modulates the output of a single PLL in order to  
“spread” the bandwidth of a synthesized clock and, more  
importantly, decreases the peak amplitudes of its  
harmonics. This result in a significantly lower system EMI  
compared to the typical narrow band signal produced by  
oscillators and most frequency generators. Lowering EMI  
by increasing a signal’s bandwidth is called ‘spread  
spectrum clock generation’.  
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ƒ
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Supports most mobile graphic accelerator and LCD  
timing controller specifications  
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Available in 8 pin SOIC and TSSOP Packages  
Applications  
Product Description  
The P2040C is targeted towards digital flat panel  
applications for Notebook PCs, Palm-size PCs, Office  
Automation Equipments and LCD Monitors.  
The P2040C is a selectable spread spectrum frequency  
modulator designed specifically for digital flat panel  
applications. The P2040C reduces electromagnetic  
interference (EMI) at the clock source which provides  
Block Diagram  
VDD  
SR0 SR1 MRA  
SSON#  
PLL  
Modulation  
CLKIN  
Frequency  
Divider  
Output  
Divider  
Phase  
Loop  
Filter  
VCO  
Detector  
Feedback  
Divider  
ModOUT  
VSS  
Alliance Semiconductor  
2575 Augustine Drive Santa Clara, CA Tel: 408.855.4900 Fax: 408.855.4999 www.alsc.com  
Notice: The information in this document is subject to change without notice.  
September 2005  
P2040C  
rev 1.4  
Pin Configuration  
1
2
3
4
8
7
6
5
CLKIN  
MRA  
VDD  
SR0  
P2040C  
ModOUT  
SR1  
VSS  
SSON#  
Pin Description  
Pin  
Pin#  
Type  
Description  
Name  
1
2
3
4
CLKIN  
MRA  
SR1  
I
I
External reference frequency input. Connect to externally generated reference signal.  
Digital logic input used to select modulation rate. This pin has an internal pull-up resistor.  
Digital logic input used to select Spreading Range. This pin has an internal pull-up resistor.  
Ground to entire chip. Connect to system ground.  
I
VSS  
P
Digital logic input used to enable Spread Spectrum function (Active LOW). Spread Spectrum  
5
SSON#  
I
function enabled when LOW, disabled when HIGH. This pin has an internal pull-low resistor.  
6
7
8
ModOUT  
SR0  
O
I
Spread spectrum Clock Output.  
Digital logic input used to select Spreading Range. This pin has an internal pull-up resistor.  
Power supply for the entire chip.  
VDD  
P
Modulation Selection (Commercial) – Table 1  
Spreading Range  
MRA SR1 SR0  
Modulation Rate  
54MHz  
±1.4%  
±2.0%  
±1.1%  
±1.8%  
±1.3%  
±2.2%  
±1.4%  
±2.1%  
65MHz  
±1.2%  
±1.9%  
±0.9%  
±1.5%  
±1.3%  
±2.1%  
±1.3%  
±2.1%  
81MHz  
±1.0%  
±1.6%  
±0.5%  
±1.0%  
±1.3%  
±2.1%  
±1.4%  
±2.1%  
140MHz  
±0.6%  
±1.0%  
±0.3%  
±0.54%  
±1.25%  
±2.0%  
±1.2%  
±1.9%  
162MHz  
±0.4%  
±0.8%  
±0.3%  
±0.4%  
±1.1%  
±1.8%  
±0.9%  
±1.4%  
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
(Fin/80) * 62.49KHz  
(Fin/80) * 62.49KHz  
(Fin/80) * 62.49KHz  
(Fin/80) * 62.49KHz  
(Fin/80) * 20.83KHz  
(Fin/80) * 20.83KHz  
(Fin/80) * 20.83KHz  
(Fin/80) * 20.83KHz  
LCD Panel EMI Reduction IC  
2 of 9  
Notice: The information in this document is subject to change without notice.  
September 2005  
rev 1.4  
P2040C  
Spread Spectrum Selection  
Table 1 illustrates the possible spread spectrum options. The optimal setting should minimize system EMI to the fullest without  
affecting system performance. The spreading is described as a percentage deviation of the center frequency  
(Note: The center frequency is the frequency of the external reference input on CLKIN, Pin 1).  
Example: P2040C is designed for high resolution flat panel applications and is able to support panel frequencies from 50MHz  
to 170MHz. For a 65MHz pixel clock frequency, a spreading selection of MRA=0, SR1=1 and SR0 =1 provides a percentage  
deviation of ±1.50% (see Table 1). This result in frequency on ModOUT being swept from 64.03MHz to 65.98MHz at a  
modulation rate of 50.77KHz (see Table 1). This particular example (see Figure below) given here is a common EMI reduction  
method for notebook LCD panel and has already been implemented by most of the leading OEM and mobile graphic  
accelerator manufacturers.  
Application Schematic for Mobile LCD Graphics Controllers  
`
Modulated 65MHz signal with  
65MHz from graphics accelerator  
±1.5 % deviation and modulation  
rate of 50.77KHz. This signal is  
connected back to the spread  
spectrum input pin (SSIN) of the  
graphics accelerator.  
1
CLKIN  
VDD  
SR0  
8
7
MRA  
SR1  
VSS  
2
+3.3V  
0.1µF  
3
ModOUT  
SSON#  
6
5
4
Digital control for the SS enable  
or disable  
P2040C  
LCD Panel EMI Reduction IC  
3 of 9  
Notice: The information in this document is subject to change without notice.  
September 2005  
P2040C  
rev 1.4  
Absolute Maximum Ratings  
Symbol  
Parameter  
Voltage on any pin with respect to Ground  
Rating  
-0.5 to +7.0  
-65 to +125  
-20 to +85  
260  
Unit  
V
°C  
°C  
°C  
VDD, VIN  
TSTG  
TA  
Storage temperature  
Operating temperature  
Ts  
Max. Soldering Temperature (10 sec)  
Thermal Resistance from Junction For SOIC Package  
156.5  
ө
°C/W  
°C  
JA  
to Ambient ( No Air Flow)  
Junction Temperature  
For TSSOP Package  
124  
TJ  
150  
2
Static Discharge Voltage  
TDV  
KV  
(As per JEDEC STD22- A114-B)  
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  
(Test condition: All parameters are measured at room temperature (+25°C) unless otherwise stated)  
Symbol  
VIL  
Parameter  
Min  
VSS - 0.3  
Typ  
-
-
Max  
0.8  
VDD + 0.3  
Unit  
V
V
Input low voltage  
Input high voltage  
VIH  
2.0  
IIL  
IIH  
VOL  
VOH  
IDD  
ICC  
VDD  
tON  
Input low current (pull-up resistor on inputs SR0, SR1 and MRA)  
Input high current (pull-down resistor on input SSON#)  
Output low voltage (VDD = 3.3V, IOL = 20mA)  
Output high voltage (VDD = 3.3V, IOL = 20mA)  
Static supply current standby mode  
Dynamic supply current (3.3V and 10pF loading)  
Operating Voltage  
Power-up time (first locked cycle after power up)  
Clock output impedance  
-
-
-
-
-
-
-
-40  
40  
0.4  
-
µA  
µA  
V
2.5  
-
9
3.0  
-
-
V
0.7  
16  
3.3  
0.18  
50  
-
mA  
mA  
V
mS  
22  
3.6  
-
ZOUT  
-
AC Electrical Characteristics  
Symbol  
Parameter  
Min  
50  
0.3  
0.3  
-
Typ  
Max  
170  
1.0  
Unit  
fIN  
tLH*  
tHL*  
tJC  
Input frequency  
MHz  
nS  
nS  
pS  
%
Output rise time (measured at 0.8V to 2.0V)  
Output fall time (measured at 2.0V to 0.8V)  
Jitter (cycle to cycle)  
0.7  
0.7  
-
1.0  
360  
55  
tD  
Output duty cycle  
45  
50  
*tLH and tHL are measured into a capacitive load of 15pF  
LCD Panel EMI Reduction IC  
4 of 9  
Notice: The information in this document is subject to change without notice.  
September 2005  
P2040C  
rev 1.4  
Package Information  
8-lead (150-mil) SOIC Package  
H
E
D
A2  
A
C
θ
e
A1  
L
B
Dimensions  
Symbol  
Inches  
Millimeters  
Min  
Max  
0.010  
0.069  
0.059  
0.020  
0.010  
Min  
0.10  
1.35  
1.25  
0.31  
0.18  
Max  
0.25  
1.75  
1.50  
0.51  
0.25  
A1  
A
0.004  
0.053  
0.049  
0.012  
0.007  
A2  
B
C
D
E
0.193 BSC  
0.154 BSC  
0.050 BSC  
0.236 BSC  
4.90 BSC  
3.91 BSC  
1.27 BSC  
6.00 BSC  
e
H
L
0.016  
0°  
0.050  
8°  
0.41  
0°  
1.27  
8°  
θ
LCD Panel EMI Reduction IC  
5 of 9  
Notice: The information in this document is subject to change without notice.  
September 2005  
rev 1.4  
P2040C  
8-lead Thin Shrunk Small Outline Package (4.40-MM Body)  
H
E
D
A2  
A
C
θ
e
A1  
L
B
Dimensions  
Symbol  
Inches  
Millimeters  
Min  
Max  
Min  
Max  
A
A1  
A2  
B
0.043  
0.006  
0.037  
0.012  
0.008  
0.122  
0.177  
1.10  
0.002  
0.033  
0.008  
0.004  
0.114  
0.169  
0.05  
0.85  
0.19  
0.09  
2.90  
4.30  
0.15  
0.95  
0.30  
0.20  
3.10  
4.50  
c
D
E
e
0.026 BSC  
0.252 BSC  
0.65 BSC  
6.40 BSC  
H
L
0.020  
0°  
0.028  
8°  
0.50  
0°  
0.70  
8°  
θ
LCD Panel EMI Reduction IC  
6 of 9  
Notice: The information in this document is subject to change without notice.  
September 2005  
P2040C  
rev 1.4  
Ordering Information  
Part Number  
P2040C-08ST  
P2040C-08SR  
P2040C-08TT  
P2040C-08TR  
I2040C-08ST  
I2040C-08SR  
I2040C-08TT  
I2040C-08TR  
Marking  
P2040C  
P2040C  
P2040C  
P2040C  
I2040C  
I2040C  
I2040C  
I2040C  
Package Type  
8-Pin SOIC, TUBE  
8-Pin SOIC, TAPE & REEL  
8-Pin TSSOP, TUBE  
8-Pin TSSOP, TAPE & REEL  
8-Pin SOIC, TUBE  
8-Pin SOIC, TAPE & REEL  
8-Pin TSSOP, TUBE  
8-Pin TSSOP, TAPE & REEL  
8-Pin SOIC, TUBE  
8-Pin SOIC, TAPE & REEL  
8-Pin TSSOP, TUBE  
8-Pin TSSOP, TAPE & REEL  
8-Pin SOIC, TUBE, Pb Free  
8-Pin SOIC, TAPE & REEL, Pb Free  
8-Pin TSSOP, TUBE, Pb Free  
8-Pin TSSOP, TAPE & REEL, Pb Free  
8-Pin SOIC, TUBE, Pb Free  
8-Pin SOIC, TAPE & REEL, Pb Free  
8-Pin TSSOP, TUBE, Pb Free  
8-Pin TSSOP, TAPE & REEL, Pb Free  
8-Pin SOIC, TUBE, Pb Free  
8-Pin SOIC, TAPE & REEL, Pb Free  
8-Pin TSSOP, TUBE, Pb Free  
8-Pin TSSOP, TAPE & REEL, Pb Free  
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  
Qty/reel  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
Temperature  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
See Flow  
X2040C-08ST  
X2040C-08SR  
X2040C-08TT  
X2040C-08TR  
P2040CF-08ST  
P2040CF-08SR  
P2040CF-08TT  
P2040CF-08TR  
I2040CF-08ST  
I2040CF-08SR  
I2040CF-08TT  
I2040CF-08TR  
X2040CF-08ST  
X2040CF-08SR  
X2040CF-08TT  
X2040CF-08TR  
P2040CG-08ST  
P2040CG-08SR  
P2040CG-08TT  
P2040CG-08TR  
I2040CG-08ST  
I2040CG-08SR  
I2040CG-08TT  
I2040CG-08TR  
X2040CG-08ST  
X2040CG-08SR  
X2040CG-08TT  
X2040CG-08TR  
X2040C  
X2040C  
X2040C  
X2040C  
P2040CF  
P2040CF  
P2040CF  
P2040CF  
I2040CF  
I2040CF  
I2040CF  
I2040CF  
X2040CF  
X2040CF  
X2040CF  
X2040CF  
P2040CG  
P2040CG  
P2040CG  
P2040CG  
I2040CG  
I2040CG  
I2040CG  
I2040CG  
X2040CG  
X2040CG  
X2040CG  
X2040CG  
8-Pin SOIC, TAPE & REEL, Green  
8-Pin TSSOP, TUBE, Green  
8-Pin TSSOP, TAPE & REEL, Green  
LCD Panel EMI Reduction IC  
7 of 9  
Notice: The information in this document is subject to change without notice.  
September 2005  
P2040C  
rev 1.4  
Device Ordering Information  
P 2 0 4 0 C F - 0 8 X X  
Package:  
ST – SOIC, TUBE  
SR - SOIC, T/R  
TT – TSSOP, TUBE  
TR - TSSOP, T/R  
Pin Count  
F = Pb FREE and RoHS COMPLIANT PART  
G = Green  
DEVICE NUMBER  
Flow:  
P = Commercial Temperature Range (0°C to 70°C)  
I = Industrial Temperature Range (-40°C to 85°C)  
X = Automotive Temperature Range (-40°C to 125°C)  
Licensed under U.S Patent Nos 5,488,627 and 5,631,921  
LCD Panel EMI Reduction IC  
8 of 9  
Notice: The information in this document is subject to change without notice.  
September 2005  
rev 1.4  
P2040C  
Alliance Semiconductor Corporation  
2575 Augustine Drive,  
Santa Clara, CA 95054  
Tel# 408-855-4900  
Copyright © Alliance Semiconductor  
All Rights Reserved  
Preliminary Information  
Part Number: P2040C  
Document Version: v1.4  
Fax: 408-855-4999  
www.alsc.com  
Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to Alliance Semiconductor, dated 11-11-2003  
© Copyright 2003 Alliance Semiconductor Corporation. All rights reserved. Our three-point logo, our name and Intelliwatt are  
trademarks or registered trademarks of Alliance. All other brand and product names may be the trademarks of their respective  
companies. Alliance reserves the right to make changes to this document and its products at any time without notice. Alliance  
assumes no responsibility for any errors that may appear in this document. The data contained herein represents Alliance's  
best data and/or estimates at the time of issuance. Alliance 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. Alliance 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 Alliance 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 Alliance's  
Terms and Conditions of Sale (which are available from Alliance). All sales of Alliance products are made exclusively  
according to Alliance's Terms and Conditions of Sale. The purchase of products from Alliance does not convey a license under  
any patent rights, copyrights; mask works rights, trademarks, or any other intellectual property rights of Alliance or third  
parties. Alliance 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 Alliance products in such  
life-supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify Alliance against all  
claims arising from such use.  
LCD Panel EMI Reduction IC  
9 of 9  
Notice: The information in this document is subject to change without notice.  

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