ALSC I2040CG-08TR Lcd panel emi reduction ic Datasheet

P2040C
September 2005
rev 1.4
LCD Panel EMI Reduction IC
Features
system wide reduction of EMI of all clock dependent
signals. The P2040C allows significant system cost
ƒ
FCC approved method of EMI attenuation.
ƒ
Provides up to 15dB of EMI suppression
savings by reducing the number of circuit board layers and
ƒ
Generates a low EMI spread spectrum clock of the
shielding that are traditionally required to pass EMI
input frequency
regulations.
ƒ
50MHz to 170MHz input frequency range
ƒ
Optimized for 54MHz, 65MHz, 81MHz, 140MHz,
and 162MHz pixel clock frequencies
Internal loop filter minimizes external components
ƒ
and board space
The P2040C uses the most efficient and optimized
modulation
profile
approved
by
the
FCC
and
is
implemented in a proprietary all-digital method. The
ƒ
8 selectable spread ranges, up to ± 2.2%
P2040C modulates the output of a single PLL in order to
ƒ
SSON# control pin for spread spectrum enable and
“spread” the bandwidth of a synthesized clock and, more
disable options
importantly, decreases the
ƒ
2 selectable modulation rates
harmonics. This result in a significantly lower system EMI
ƒ
Low Cycle-to-cycle jitter
ƒ
3.3V Operating Voltage
ƒ
Ultra low power CMOS design
ƒ
Supports most mobile graphic accelerator and LCD
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’.
timing controller specifications
Available in 8 pin SOIC and TSSOP Packages
ƒ
peak amplitudes of its
Applications
Product Description
The P2040C is a selectable spread spectrum frequency
modulator designed specifically for digital flat panel
applications.
The
P2040C
reduces
electromagnetic
The P2040C is targeted towards digital flat panel
applications for Notebook PCs, Palm-size PCs, Office
Automation Equipments and LCD Monitors.
interference (EMI) at the clock source which provides
Block Diagram
SR0 SR1 MRA SSON#
VDD
PLL
Modulation
CLKIN
Frequency
Divider
Feedback
Divider
Phase
Detector
Loop
Filter
VCO
Output
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.
P2040C
September 2005
rev 1.4
Pin Configuration
CLKIN
1
8
VDD
MRA
2
7
SR0
SR1
3
6
ModOUT
VSS
4
5
SSON#
P2040C
Pin Description
Pin#
Pin
Name
Type
1
CLKIN
I
External reference frequency input. Connect to externally generated reference signal.
2
MRA
I
Digital logic input used to select modulation rate. This pin has an internal pull-up resistor.
3
SR1
I
Digital logic input used to select Spreading Range. This pin has an internal pull-up resistor.
4
VSS
P
Ground to entire chip. Connect to system ground.
Description
5
SSON#
I
Digital logic input used to enable Spread Spectrum function (Active LOW). Spread Spectrum
function enabled when LOW, disabled when HIGH. This pin has an internal pull-low resistor.
6
ModOUT
O
Spread spectrum Clock Output.
7
SR0
I
Digital logic input used to select Spreading Range. This pin has an internal pull-up resistor.
8
VDD
P
Power supply for the entire chip.
Modulation Selection (Commercial) – Table 1
MRA
SR1
SR0
0
0
0
Spreading Range
Modulation Rate
54MHz
65MHz
81MHz
140MHz
162MHz
0
±1.4%
±1.2%
±1.0%
±0.6%
±0.4%
(Fin/80) * 62.49KHz
0
1
±2.0%
±1.9%
±1.6%
±1.0%
±0.8%
(Fin/80) * 62.49KHz
0
1
0
±1.1%
±0.9%
±0.5%
±0.3%
±0.3%
(Fin/80) * 62.49KHz
0
1
1
±1.8%
±1.5%
±1.0%
±0.54%
±0.4%
(Fin/80) * 62.49KHz
1
0
0
±1.3%
±1.3%
±1.3%
±1.25%
±1.1%
(Fin/80) * 20.83KHz
1
0
1
±2.2%
±2.1%
±2.1%
±2.0%
±1.8%
(Fin/80) * 20.83KHz
1
1
0
±1.4%
±1.3%
±1.4%
±1.2%
±0.9%
(Fin/80) * 20.83KHz
1
1
1
±2.1%
±2.1%
±2.1%
±1.4%
(Fin/80) * 20.83KHz
±1.9%
LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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P2040C
September 2005
rev 1.4
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
`
65MHz from graphics accelerator
1
CLKIN
VDD 8
2
MRA
SR0 7
3
SR1
ModOUT
6
4 VSS
SSON#
5
0.1µF
P2040C
Modulated 65MHz signal with
±1.5 % deviation and modulation
rate of 50.77KHz. This signal is
connected back to the spread
+3.3V spectrum input pin (SSIN) of the
graphics accelerator.
Digital control for the SS enable
or disable
LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
3 of 9
P2040C
September 2005
rev 1.4
Absolute Maximum Ratings
Symbol
Parameter
Rating
Unit
VDD, VIN
Voltage on any pin with respect to Ground
-0.5 to +7.0
V
Storage temperature
-65 to +125
°C
TA
Operating temperature
-20 to +85
°C
Ts
Max. Soldering Temperature (10 sec)
Thermal Resistance from Junction For SOIC Package
to Ambient ( No Air Flow)
For TSSOP Package
260
156.5
124
150
°C
°C/W
2
KV
TSTG
өJA
TJ
Junction Temperature
TDV
Static Discharge Voltage
(As per JEDEC STD22- A114-B)
°C
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
Min
Typ
Max
Unit
VIL
Input low voltage
Parameter
VSS - 0.3
-
0.8
V
VIH
Input high voltage
2.0
-
VDD + 0.3
V
IIL
Input low current (pull-up resistor on inputs SR0, SR1 and MRA)
-
-
-40
µA
IIH
Input high current (pull-down resistor on input SSON#)
-
-
40
µA
VOL
Output low voltage (VDD = 3.3V, IOL = 20mA)
-
-
0.4
V
VOH
Output high voltage (VDD = 3.3V, IOL = 20mA)
2.5
-
-
V
IDD
Static supply current standby mode
-
0.7
-
mA
ICC
Dynamic supply current (3.3V and 10pF loading)
9
16
22
mA
3.0
3.3
3.6
V
Power-up time (first locked cycle after power up)
-
0.18
-
mS
Clock output impedance
-
50
-
Ω
VDD
tON
ZOUT
Operating Voltage
AC Electrical Characteristics
Symbol
Parameter
Min
Typ
Max
Unit
170
MHz
fIN
Input frequency
50
tLH*
Output rise time (measured at 0.8V to 2.0V)
0.3
0.7
1.0
nS
tHL*
Output fall time (measured at 2.0V to 0.8V)
0.3
0.7
1.0
nS
tJC
Jitter (cycle to cycle)
-
-
360
pS
tD
Output duty cycle
45
50
55
%
*tLH and tHL are measured into a capacitive load of 15pF
LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
4 of 9
P2040C
September 2005
rev 1.4
Package Information
8-lead (150-mil) SOIC Package
H
E
D
A2
A
C
A1
D
θ
e
L
B
Dimensions
Symbol
Inches
Min
Max
Millimeters
Min
Max
A1
0.004
0.010
0.10
0.25
A
0.053
0.069
1.35
1.75
A2
0.049
0.059
1.25
1.50
B
0.012
0.020
0.31
0.51
C
0.007
0.010
0.18
0.25
D
0.193 BSC
4.90 BSC
E
0.154 BSC
3.91 BSC
e
0.050 BSC
1.27 BSC
H
0.236 BSC
6.00 BSC
L
0.016
0.050
0.41
1.27
θ
0°
8°
0°
8°
LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
5 of 9
P2040C
September 2005
rev 1.4
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
Min
Millimeters
Max
A
Min
Max
0.043
1.10
A1
0.002
0.006
0.05
0.15
A2
0.033
0.037
0.85
0.95
B
0.008
0.012
0.19
0.30
c
0.004
0.008
0.09
0.20
D
0.114
0.122
2.90
3.10
E
0.169
0.177
4.30
4.50
e
0.026 BSC
0.65 BSC
H
0.252 BSC
6.40 BSC
L
0.020
0.028
0.50
0.70
θ
0°
8°
0°
8°
LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
6 of 9
P2040C
September 2005
rev 1.4
Ordering Information
Part Number
Marking
Package Type
P2040C-08ST
P2040C
8-Pin SOIC, TUBE
P2040C-08SR
P2040C
8-Pin SOIC, TAPE & REEL
P2040C-08TT
P2040C
8-Pin TSSOP, TUBE
P2040C-08TR
P2040C
8-Pin TSSOP, TAPE & REEL
I2040C-08ST
I2040C
8-Pin SOIC, TUBE
I2040C-08SR
I2040C
8-Pin SOIC, TAPE & REEL
I2040C-08TT
I2040C
8-Pin TSSOP, TUBE
I2040C-08TR
I2040C
8-Pin TSSOP, TAPE & REEL
X2040C-08ST
X2040C
8-Pin SOIC, TUBE
X2040C-08SR
X2040C
8-Pin SOIC, TAPE & REEL
X2040C-08TT
X2040C
8-Pin TSSOP, TUBE
X2040C-08TR
X2040C
8-Pin TSSOP, TAPE & REEL
P2040CF-08ST
P2040CF
8-Pin SOIC, TUBE, Pb Free
P2040CF-08SR
P2040CF
8-Pin SOIC, TAPE & REEL, Pb Free
P2040CF-08TT
P2040CF
8-Pin TSSOP, TUBE, Pb Free
P2040CF-08TR
P2040CF
8-Pin TSSOP, TAPE & REEL, Pb Free
I2040CF-08ST
I2040CF
8-Pin SOIC, TUBE, Pb Free
I2040CF-08SR
I2040CF
8-Pin SOIC, TAPE & REEL, Pb Free
I2040CF-08TT
I2040CF
8-Pin TSSOP, TUBE, Pb Free
I2040CF-08TR
I2040CF
8-Pin TSSOP, TAPE & REEL, Pb Free
X2040CF-08ST
X2040CF
8-Pin SOIC, TUBE, Pb Free
X2040CF-08SR
X2040CF
8-Pin SOIC, TAPE & REEL, Pb Free
X2040CF-08TT
X2040CF
8-Pin TSSOP, TUBE, Pb Free
X2040CF-08TR
X2040CF
8-Pin TSSOP, TAPE & REEL, Pb Free
P2040CG-08ST
P2040CG
8-Pin SOIC, TUBE, Green
P2040CG-08SR
P2040CG
8-Pin SOIC, TAPE & REEL, Green
P2040CG-08TT
P2040CG
8-Pin TSSOP, TUBE, Green
P2040CG-08TR
P2040CG
8-Pin TSSOP, TAPE & REEL, Green
I2040CG-08ST
I2040CG
8-Pin SOIC, TUBE, Green
I2040CG-08SR
I2040CG
8-Pin SOIC, TAPE & REEL, Green
I2040CG-08TT
I2040CG
8-Pin TSSOP, TUBE, Green
I2040CG-08TR
I2040CG
8-Pin TSSOP, TAPE & REEL, Green
X2040CG-08ST
X2040CG
8-Pin SOIC, TUBE, Green
X2040CG-08SR
X2040CG
8-Pin SOIC, TAPE & REEL, Green
X2040CG-08TT
X2040CG
8-Pin TSSOP, TUBE, Green
X2040CG-08TR
X2040CG
8-Pin TSSOP, TAPE & REEL, Green
LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
Qty/reel
Temperature
See Flow
2500
See Flow
See Flow
2500
See Flow
See Flow
2500
See Flow
See Flow
2500
See Flow
See Flow
2500
See Flow
See Flow
2500
See Flow
See Flow
2500
See Flow
See Flow
2500
See Flow
See Flow
2500
See Flow
See Flow
2500
See Flow
See Flow
2500
See Flow
See Flow
2500
See Flow
See Flow
2500
See Flow
2500
See Flow
See Flow
See Flow
2500
See Flow
See Flow
2500
See Flow
See Flow
2500
See Flow
See Flow
2500
See Flow
7 of 9
P2040C
September 2005
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
Notice: The information in this document is subject to change without notice.
8 of 9
P2040C
September 2005
rev 1.4
Alliance Semiconductor Corporation
2575 Augustine Drive,
Santa Clara, CA 95054
Tel# 408-855-4900
Fax: 408-855-4999
www.alsc.com
Copyright © Alliance Semiconductor
All Rights Reserved
Preliminary Information
Part Number: P2040C
Document Version: v1.4
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
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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
Notice: The information in this document is subject to change without notice.
9 of 9
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