P2040CF-08TT [ALSC]
LCD Panel EMI Reduction IC; 液晶面板降低EMI IC
| 型号： | P2040CF-08TT |
| 厂家： | 
ALLIANCE SEMICONDUCTOR CORPORATION |
| 描述： | LCD Panel EMI Reduction IC |
| 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.
FCC approved method of EMI attenuation.
Provides up to 15dB of EMI suppression
Generates a low EMI spread spectrum clock of the
input frequency
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’.
Supports most mobile graphic accelerator and LCD
timing controller specifications
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
SR0
P2040C
ModOUT
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
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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
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
Ω
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
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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
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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
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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
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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
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claims arising from such use.
LCD Panel EMI Reduction IC
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Notice: The information in this document is subject to change without notice.
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