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August 2007  
rev 1.5  
ASM3P2182A  
LCD Panel EMI Reduction IC  
Features  
The ASM3P2182A reduces electromagnetic interference  
(EMI) at the clock source, allowing system wide  
reduction of EMI of down stream clock and data  
dependent signals. The ASM3P2182A allows significant  
system cost savings by reducing the number of circuit  
board layers ferrite beads, shielding and other passive  
components that are traditionally required to pass EMI  
regulations.  
•
•
•
FCC approved method of EMI attenuation.  
Provides up to 15dB EMI reduction.  
Generates a 1X low EMI spread spectrum clock of  
the input frequency.  
•
•
Input frequency range: 25MHz to 210MHz.  
Internal loop filter minimizes external components  
and board space.  
•
•
Center spread.  
4 spread frequency deviation selections: ± 0.13% to  
± 1.24%.  
The ASM3P2182A uses the most efficient and optimized  
modulation profile approved by the FCC and is  
implemented in a proprietary all digital method.  
•
•
•
•
•
Low inherent Cycle-to-cycle jitter.  
3.3V Operating Voltage.  
TTL or CMOS compatible inputs and outputs.  
Low power CMOS design.  
Supports notebook VGA and other LCD timing  
controller applications.  
The ASM3P2182A 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 results in 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’.  
•
•
Products are available for Industrial temperature  
range.  
Available in 8-pin SOIC and TSSOP Packages.  
Applications  
Product Description  
The ASM3P2182A is targeted towards EMI management  
for memory and LVDS interfaces in mobile graphic  
chipsets and high-speed digital applications such as PC  
The ASM3P2182A is a versatile spread spectrum  
frequency modulator designed specifically for a wide  
range of input clock frequencies from 25MHz to 210MHz.  
(Refer Input Frequency and Modulation Rate Table). The  
ASM3P2182A can generate an EMI reduced clock from  
peripheral  
devices,  
consumer  
electronics,  
and  
embedded controller systems.  
an OSC or  
a
system generated clock. The  
ASM3P2182A offers a Center Spread clock and with a  
percentage deviation from ± 0.13% or ± 1.24%.  
VDD  
S0  
FS0 FS1  
PLL  
Modulation  
CLKIN  
Crystal  
Frequency  
Divider  
Oscillator  
Output  
Divider  
Phase  
Loop  
VCO  
Detector  
Filter  
Feedback  
Divider  
ModOUT  
VSS  
LCD Panel EMI Reduction IC  
1 of 8  
Notice: The information in this document is subject to change without notice.  
August 2007  
rev 1.5  
ASM3P2182A  
Pin Configuration  
CLKIN  
FS1  
FS0  
VDD  
1
8
GND 2  
7
6
ASM3P2182A  
S1  
S0  
3
4
ModOUT  
5
Pin Description  
Pin#  
1
Pin Name  
CLKIN  
Type  
Description  
Connect to externally generated clock signal.  
I
2
GND  
P
Ground to entire chip.  
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.  
Spread spectrum low EMI output.  
Power supply for the entire chip (3.3V).  
3
4
S1  
S0  
I
I
5
6
ModOUT  
VDD  
O
P
Frequency range select. Digital logic input used to select frequency range  
(Refer Input Frequency and Modulation Rate Table).  
This pin has an internal pull-up resistor.  
Frequency range select. Digital logic input used to select frequency range  
(Refer Input Frequency and Modulation Rate Table).  
This pin has an internal pull-up resistor.  
7
8
FS0  
FS1  
I
I
Input Frequency and Modulation Rate table  
FS1 (pin 8)  
FS0 (pin 7)  
Frequency Range  
0
0
1
1
0
1
0
1
25MHz to 50MHz  
50MHz to 103MHz  
75MHz to 150MHz  
160MHz to 210MHz  
LCD Panel EMI Reduction IC  
2 of 8  
Notice: The information in this document is subject to change without notice.  
August 2007  
rev 1.5  
ASM3P2182A  
Spread Deviation Selection table  
Spreading Range (± %)  
S1  
S0  
25  
40  
65  
81*  
81**  
108  
120  
162  
200  
MHz  
MHz  
MHz  
MHz  
MHz  
MHz  
MHz  
MHz  
MHz  
0
0
1
1
0
1
0
1
0.28  
0.8  
1.2  
2.1  
0.19  
0.3  
0.54  
1.0  
0.15  
0.3  
0.45  
1.1  
0.12  
0.2  
0.4  
0.9  
0.18  
0.5  
0.8  
1.4  
0.15  
0.3  
0.6  
1.1  
0.1  
0.1  
0.3  
1.0  
1.9  
0.06  
0.1  
0.6  
1.2  
0.19  
0.36  
0.75  
*Frequency Range- 50MHz to 103MHz  
** Frequency Range- 75MHz to 150MHz  
Absolute Maximum Ratings  
Symbol  
Parameter  
Rating  
-0.5 to +4.6  
Unit  
V
VDD  
Supply Voltage pin with respect to Ground  
Input Voltage pin with respect to Ground  
Output Voltage pin with respect to Ground  
VIN  
VSS-0.5 to VDD+0.5  
VSS-0.5 to VDD+0.5  
V
VOUT  
V
TSTG  
Ts  
TJ  
Storage temperature  
Max. Soldering Temperature (10 sec)  
Junction Temperature  
-55 to +125  
260  
°C  
°C  
°C  
150  
TDV  
2
KV  
Static Discharge Voltage(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.  
Recommended Operating Conditions  
Parameter  
Description  
Min  
2.7  
0
Typ  
3.3  
Max  
3.7  
Unit  
V
VDD  
Operating Voltage  
TA  
Operating Temperature (Ambient Temperature)  
Load Capacitance  
+70  
15  
°C  
CL  
pF  
pF  
CIN  
Input Capacitance  
5
LCD Panel EMI Reduction IC  
3 of 8  
Notice: The information in this document is subject to change without notice.  
August 2007  
rev 1.5  
ASM3P2182A  
DC Electrical Characteristics  
Symbol  
Parameter  
Min  
Typ  
Max  
Unit  
VIL  
VIH  
IIL  
Input low voltage  
Input high voltage  
Input low current  
Input high current  
GND – 0.3  
0.8  
V
2.0  
VDD + 0.3  
-35  
V
µA  
µA  
V
IIH  
35  
VOL  
VOH  
ICC  
Output low voltage (VDD = 3.3V, IOL = 20mA)  
0.4  
Output high voltage (VDD = 3.3V, IOH = 20mA)  
2.5  
V
Dynamic supply current  
Normal mode (3.3V and 10pF loading)  
Static supply current  
8.46  
12  
17.78  
3.7  
mA  
IDD  
0.6  
3.3  
mA  
V
Standby mode*  
Operating voltage  
VDD  
2.7  
Power up time  
tON  
0.18  
50  
mS  
(first locked clock cycle after power up)  
ZOUT  
Clock out impedance  
Ω
* CLKIN pin is pulled low  
AC Electrical Characteristics  
Symbol  
Parameter  
Min  
25  
Typ  
Max  
210  
210  
1.4  
Unit  
CLKIN  
ModOUT  
tLH*  
Input frequency  
Output frequency  
MHz  
MHz  
nS  
25  
Output rise time (measured at 0.8V to 2.0V)  
Output fall time (measured at 2.0V to 0.8V)  
Jitter (cycle to cycle)  
1.2  
0.8  
1.32  
0.9  
tHL*  
1.0  
nS  
tJC  
360  
55  
pS  
TD  
Output duty cycle  
45  
50  
%
*tLH and tHL are measured into a capacitive load of 15pF  
LCD Panel EMI Reduction IC  
4 of 8  
Notice: The information in this document is subject to change without notice.  
August 2007  
rev 1.5  
ASM3P2182A  
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 8  
Notice: The information in this document is subject to change without notice.  
August 2007  
rev 1.5  
ASM3P2182A  
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  
0.15  
0.95  
0.30  
0.20  
3.10  
4.50  
0.002  
0.033  
0.008  
0.004  
0.114  
0.169  
0.05  
0.85  
0.19  
0.09  
2.90  
4.30  
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 8  
Notice: The information in this document is subject to change without notice.  
August 2007  
rev 1.5  
ASM3P2182A  
Ordering Information  
Part Number  
ASM3P2182AF-08TT  
ASM3P2182AF-08TR  
ASM3P2182AF-08ST  
ASM3P2182AF-08SR  
ASM3P2182A-08TT  
ASM3P2182A-08TR  
ASM3P2182A-08ST  
ASM3P2182A-08SR  
ASM3P2182AG-08TT  
ASM3P2182AG-08TR  
ASM3P2182AG-08ST  
ASM3P2182AG-08SR  
Marking  
3P2182AF  
3P2182AF  
3P2182AF  
3P2182AF  
3P2182A  
3P2182A  
3P2182A  
3P2182A  
3P2182AG  
3P2182AG  
3P2182AG  
3P2182AG  
Package  
Temperature  
Commercial  
Commercial  
Commercial  
Commercial  
Commercial  
Commercial  
Commercial  
Commercial  
Commercial  
Commercial  
Commercial  
Commercial  
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  
8-Pin TSSOP, TAPE & REEL  
8-Pin SOIC, TUBE  
8-Pin SOIC, TAPE & REEL  
8-Pin TSSOP, TUBE, Green  
8-Pin TSSOP, TAPE & REEL, Green  
8-Pin SOIC, TUBE, Green  
8-Pin SOIC, TAPE & REEL, Green  
Device Ordering Information  
A S M 3 P 2 1 8 2 A F  
0 8 T R  
R = Tape & Reel, T = Tube or Tray  
O = SOT  
U = MSOP  
E = TQFP  
L = LQFP  
U = MSOP  
P = PDIP  
S = SOIC  
T = TSSOP  
A = SSOP  
V = TVSOP  
B = BGA  
D = QSOP  
X = SC-70  
Q = QFN  
DEVICE PIN COUNT  
F = LEAD FREE AND RoHS COMPLIANT PART  
G = GREEN PACKAGE  
PART NUMBER  
X= Automotive  
I= Industrial  
P or n/c = Commercial  
(0C to +70C)  
(-40C to +125C) (-40C to +85C)  
1 = Reserved  
6 = Power Management  
7 = Power Management  
8 = Power Management  
9 = Hi Performance  
0 = Reserved  
2 = Non PLL based  
3 = EMI Reduction  
4 = DDR support products  
5 = STD Zero Delay Buffer  
PulseCore Semiconductor Mixed Signal Product  
Licensed under US patent #5,488,627, #6,646,463 and #5,631,920.  
LCD Panel EMI Reduction IC  
7 of 8  
Notice: The information in this document is subject to change without notice.  
August 2007  
rev 1.5  
ASM3P2182A  
Copyright PulseCore Semiconductor  
All Rights Reserved  
PulseCore Semiconductor Corporation  
1715 S. Bascom Ave Suite 200  
Campbell, CA 95008  
Part Number: ASM3P2182A  
Document Version: 1.5  
Tel: 408-879-9077  
Fax: 408-879-9018  
www.pulsecoresemi.com  
Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003  
© 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.  
LCD Panel EMI Reduction IC  
8 of 8  
Notice: The information in this document is subject to change without notice.