PULSECORE P2041AF-08TT

P2041A
November 2006
rev 0.2
Versatile EMI Reduction IC
Features
which provides system wide reduction of EMI of all clock
dependent signals. The P2041A allows significant system
ƒ
FCC approved method of EMI attenuation
ƒ
Provides up to 20dB of EMI suppression
ƒ
Generates a low EMI spread spectrum clock of the
cost savings by reducing the number of circuit board layers
input frequency
ƒ
ƒ
and shielding that are traditionally required to pass EMI
regulations.
Optimized for 25MHz to 60MHz input frequency
The P2041A uses the most efficient and optimized
range
modulation
Internal loop filter minimizes external components
implemented in a proprietary all-digital method.
profile
approved
by
the
FCC
and
is
and board space
ƒ
4 selectable spread ranges
The P2041A modulates the output of a single PLL in order
ƒ
SSON control pin for spread spectrum enable and
to “spread” the bandwidth of a synthesized clock and, more
disable options
importantly,
ƒ
Low Cycle-to-cycle jitter
harmonics. This result in significantly lower system EMI
ƒ
3.3V or 5.0V operating voltage
compared to the typical narrow band signal produced by
ƒ
Low power CMOS design
oscillators and most frequency generators. Lowering EMI
ƒ
Available in 8 pin SOIC and TSSOP Packages
by increasing a signal’s bandwidth is called “spread
decreases
the
peak
amplitudes
of
its
spectrum clock generation”.
Product Description
The P2041A is a selectable spread spectrum frequency
modulator designed specifically for PC peripheral and
embedded controller markets. The
P2041A reduces
electromagnetic interference (EMI) at the clock source
Applications
The P2041A is targeted towards the embedded controller
market and PC peripheral markets including scanners,
MFP’s, printers, PDA, IA , and GPS devices.
Block Diagram
SR0
SR1
SSON
VDD
PLL
Modulation
XIN
XOUT
Crystal
Oscillator
Frequency
Divider
Feedback
Divider
Phase
Detector
Loop
Filter
VCO
Output
Divider
ModOUT
VSS
PulseCore Semiconductor Corporation
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.
P2041A
November 2006
rev 0.2
Pin Configuration
XIN/CLK
11
88
VDD
XOUT
22
77
SR0
SR1
33
66
ModOUT
VSS
44
55
SSON
P2040C
P2041A
Pin Description
Pin#
Pin Name
Type
Description
1
XIN/CLK
I
2
XOUT
I
Connect to crystal. No connect if externally generated clock signal is used.
Connect to crystal or externally generated clock signal.
3
SR1
I
Digital logic input used to select Spreading Range (see Table 1).
This pin has an internal pull-up resistor.
4
VSS
P
Ground Connection. Connect to system ground.
5
SSON
I
Digital logic input used to enable Spread Spectrum function (Active Low). Spread
Spectrum function enable when low. 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 (see Table 1).
This pin has an internal pull-up resistor.
8
VDD
P
Connect to +3.3V or +5.0V
Spread Range Selection
SR1
SR0
Spreading Range
Modulation rate
0
0
+/- 1.50%
(Fin/40)*34.72 KHz
0
1
+/- 2.50%
(Fin/40)*34.72 KHz
1
0
+/- 0.50%
(Fin/40)*34.72 KHz
1
1
+/- 1.00%
(Fin/40)*34.72 KHz
Versatile EMI Reduction IC
Notice: The information in this document is subject to change without notice.
2 of 8
P2041A
November 2006
rev 0.2
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 XIN/CLK, Pin 1).
Example of a typical printer or scanner application that operates on a clock frequency of 40MHz:
A spreading selection of SR1=1 and SR0=1 provides a percentage deviation of +/-1.00%* (see Table 1) of Center
Frequency. This results in the frequency on ModOUT being swept from 40.40MHz to 39.60MHz at a modulation rate of
(40/40)*34.72 = 34.72KHz (see Table 1). This particular example (see Figure below) given here is a common EMI reduction
method for scanners and has already been implemented by most of the leading manufacturers.
NOTE: Spreading range selection varies from different system manufacturers and their designs. The spreading range of P2041A can be set to +/-2.5% when
working with certain scanner model.
P2041A Application Schematic for Flat-Bed Scanner
VDD
40MHz
1 XIN/CLK
VDD 8
2 XOUT
SR0 7
3 SR1
ModOUT 6
4 VSS
SSON 5
P2041A
0.1µF
Modulated 40MHz signal with ± 1.00%
Deviation and modulation rate of
34.72KHz. This signal is connected back
to the clock crystal Input pin of the
system ASIC.
NOTE: The above schematic indicates
The exact setting of this example:
Default setting (no connection on pin 3,
7 and 5)
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
-40 to +85
°C
Ts
Max. Soldering Temperature (10 sec)
260
°C
TJ
Junction Temperature
150
°C
2
KV
TSTG
TDV
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.
Versatile EMI Reduction IC
Notice: The information in this document is subject to change without notice.
3 of 8
P2041A
November 2006
rev 0.2
DC Electrical Characteristics
(Test condition: All parameters are measured at room temperature (+25°C) unless otherwise stated)
Symbol
Parameter
Min
Typ
Max
VSS –0.3
-
0.8
-
-
1.5
( For 3.3V Supply Voltage)
2.0
-
VDD + 0.3
( For 5V Supply Voltage)
3.5
-
-
-
-
-35
-
-
-100
-
-
35
-
-
100
IXOL
Input Low Current
( For 3.3V Supply Voltage)
(pull-up resistor on inputs
( For 5V Supply Voltage)
SR0, SR1)
Input High Current
( For 3.3V Supply Voltage)
(pull-down resistor on input
( For 5V Supply Voltage)
SSON )
XOUT Output Low Current (VXOL @ 0.4V, VDD = 3.3V)
-
3
-
IXOH
XOUT Output High Current ( [email protected] 2.5V, VDD = 3.3V)
-
3
-
VOL
Output Low Voltage
(VDD=3.3V, IOL = 20 mA)
-
-
0.4
(VDD=5V, IOL = 20 mA)
-
-
0.5
VOH
Output High Voltage
(VDD=3.3V, IOH = 20 mA)
2.5
-
-
(VDD=5V, IOH = 20 mA)
4.5
-
-
IDD
Static Supply Current
-
1.0
-
ICC
Dynamic Supply Current
3.3V and 15pF loading
-
-
22
5V and 15pF loading
-
-
35
2.7
3.3
5.5
V
Min
Typ
Max
Unit
25
40
60
MHz
0.7
1.0
1.3
nS
0.6
0.8
1.0
nS
-
360
-
pS
45
50
55
%
VIL
Input low Voltage
VIH
Input low Voltage
IIL
IIH
VDD
( For 3.3V Supply Voltage)
( For 5V Supply Voltage)
Operating Voltage
Unit
V
V
µA
µA
mA
mA
V
V
mA
mA
AC Electrical Characteristics
Symbol
fIN
Parameter
Input Frequency
tJC
Output rise time
( Measured at 0.8V to 2.0V )
Output fall time
( Measured at 2.0 to 0.8V )
Jitter (Cycle to cycle)
tD
Output duty cycle
tLH*
tHL*
*tLH and tHL are measured into a capacitive load of 15pF
Versatile EMI Reduction IC
Notice: The information in this document is subject to change without notice.
4 of 8
P2041A
November 2006
rev 0.2
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°
Versatile EMI Reduction IC
Notice: The information in this document is subject to change without notice.
5 of 8
P2041A
November 2006
rev 0.2
8-lead TSSOP (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°
Versatile EMI Reduction IC
Notice: The information in this document is subject to change without notice.
6 of 8
P2041A
November 2006
rev 0.2
Ordering Information
Part number
Marking
Package Configuration
Temperature Range
P2041AF-08ST
P2041AF
8-Pin SOIC, Tube, Pb Free
Commercial
P2041AF-08SR
P2041AF
8-Pin SOIC, Tape and Reel, Pb Free
Commercial
P2041AF-08TT
P2041AF
8-Pin TSSOP, Tube, Pb Free
Commercial
P2041AF-08TR
P2041AF
8-Pin TSSOP, Tape and Reel, Pb Free
Commercial
P2041AG-08ST
P2041AG
8-Pin SOIC, Tube, Green
Commercial
P2041AG-08SR
P2041AG
8-Pin SOIC, Tape and Reel, Green
Commercial
P2041AG-08TT
P2041AG
8-Pin TSSOP, Tube, Green
Commercial
P2041AG-08TR
P2041AG
8-Pin TSSOP, Tape and Reel, Green
Commercial
I2041AF-08ST
I2041AF
8-Pin SOIC, Tube, Pb Free
Industrial
I2041AF-08SR
I2041AF
8-Pin SOIC, Tape and Reel, Pb Free
Industrial
I2041AF-08TT
I2041AF
8-Pin TSSOP, Tube, Pb Free
Industrial
I2041AF-08TR
I2041AF
8-Pin TSSOP, Tape and Reel, Pb Free
Industrial
I2041AG-08ST
I2041AG
8-Pin SOIC, Tube, Green
Industrial
I2041AG-08SR
I2041AG
8-Pin SOIC, Tape and Reel, Green
Industrial
I2041AG-08TT
I2041AG
8-Pin TSSOP, Tube, Green
Industrial
I2041AG-08TR
I2041AG
8-Pin TSSOP, Tape and Reel, Green
Industrial
Device Ordering Information
P 2 0 4 1 A
F - 0 8
S T
SR - SOIC, T/R
TT – TSSOP, TUBE
TR - TSSOP, T/R
ST – SOIC, TUBE
PIN COUNT
F =Lead Free and and RoHS compliant part
G = GREEN PACKAGE, LEAD FREE, and RoHS
Deviation (%) and Spread option Identifier
DEVICE NUMBER
P = Commercial Temperature Range (0°C to 70°C)
I = Industrial Temperature Range (-40°C to 85°C)
Licensed under US patent Nos 5,488,627 and 5,631,920.
Versatile EMI Reduction IC
Notice: The information in this document is subject to change without notice.
7 of 8
P2041A
November 2006
rev 0.2
PulseCore Semiconductor Corporation
1715 S. Bascom Ave Suite 200
Campbell, CA 95008
Tel: 408-879-9077
Fax: 408-879-9018
www.pulsecoresemi.com
Copyright © PulseCore Semiconductor
All Rights Reserved
Part Number: P2041A
Document Version: 0.2
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.
Versatile EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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