View I2041AF-08SR_4884448.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

November 2006 rev 0.2 Versatile EMI Reduction IC
Features
FCC approved method of EMI attenuation Provides up to 20dB of EMI suppression Generates a low EMI spread spectrum clock of the input frequency Optimized for 25MHz to 60MHz input frequency range Internal loop filter minimizes external components and board space 4 selectable spread ranges SSON control pin for spread spectrum enable and disable options Low Cycle-to-cycle jitter 3.3V or 5.0V operating voltage Low power CMOS design Available in 8 pin SOIC and TSSOP Packages
P2041A
which provides system wide reduction of EMI of all clock dependent signals. The P2041A allows significant system cost savings by reducing the number of circuit board layers and shielding that are traditionally required to pass EMI regulations. The P2041A uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all-digital method. The P2041A 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 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".
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
Modulation XIN XOUT Crystal Oscillator Frequency Divider Feedback Divider
PLL
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.
November 2006 rev 0.2
Pin Configuration
P2041A
XIN/CLK XOUT SR1 VSS
1 1 2 2 33 4 4
8 8 7 7 6 6 5 5
VDD SR0 ModOUT SSON
P2041A P2040C
Pin Description Pin#
1 2 3 4 5 6 7 8
Pin Name
XIN/CLK XOUT SR1 VSS SSON ModOUT SR0 VDD
Type
I I I P I O I P
Description
Connect to crystal or externally generated clock signal. Connect to crystal. No connect if externally generated clock signal is used. Digital logic input used to select Spreading Range (see Table 1). This pin has an internal pull-up resistor. Ground Connection. Connect to system ground. 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. Spread Spectrum Clock Output. Digital logic input used to select Spreading Range (see Table 1). This pin has an internal pull-up resistor. Connect to +3.3V or +5.0V
Spread Range Selection SR1
0 0 1 1
SR0
0 1 0 1
Spreading Range
+/- 1.50% +/- 2.50% +/- 0.50% +/- 1.00%
Modulation rate
(Fin/40)*34.72 KHz (Fin/40)*34.72 KHz (Fin/40)*34.72 KHz (Fin/40)*34.72 KHz
Versatile EMI Reduction IC
Notice: The information in this document is subject to change without notice.
2 of 8
November 2006 rev 0.2
Spread spectrum selection
P2041A
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 2 XOUT 3 SR1 4 VSS VDD 8 SR0 7 ModOUT 6 SSON 5 P2041A 0.1F 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
VDD, VIN TSTG TA Ts TJ TDV Storage temperature Operating temperature Max. Soldering Temperature (10 sec) Junction Temperature Static Discharge Voltage (As per JEDEC STD22- A114-B)
Parameter
Voltage on any pin with respect to Ground
Rating
-0.5 to +7.0 -65 to +125 -40 to +85 260 150 2
Unit
V C C C C KV
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
November 2006 rev 0.2
DC Electrical Characteristics
(Test condition: All parameters are measured at room temperature (+25C) unless otherwise stated)
P2041A
Symbol
VIL VIH IIL IIH IXOL IXOH VOL VOH IDD ICC VDD Input low Voltage Input low Voltage
Parameter
( For 3.3V Supply Voltage) ( For 5V Supply Voltage) ( For 3.3V Supply Voltage) ( For 5V Supply Voltage)
Min
VSS -0.3 2.0 3.5 2.5 4.5 2.7
Typ
3 3 1.0 3.3
Max
0.8 1.5 VDD + 0.3 -35 -100 35 100 0.4 0.5 22 35 5.5
Unit
V V A A mA mA V V mA mA V
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) XOUT Output High Current ( VXOH@ 2.5V, VDD = 3.3V) Output Low Voltage Output High Voltage Static Supply Current Dynamic Supply Current Operating Voltage 3.3V and 15pF loading 5V and 15pF loading (VDD=3.3V, IOL = 20 mA) (VDD=5V, IOL = 20 mA) (VDD=3.3V, IOH = 20 mA) (VDD=5V, IOH = 20 mA)
AC Electrical Characteristics Symbol
fIN tLH* tHL* tJC tD Input Frequency Output rise time ( Measured at 0.8V to 2.0V ) Output fall time ( Measured at 2.0 to 0.8V ) Jitter (Cycle to cycle) Output duty cycle
Parameter
Min
25 0.7 0.6 45
Typ
40 1.0 0.8 360 50
Max
60 1.3 1.0 55
Unit
MHz nS nS pS %
*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
November 2006 rev 0.2
Package Information 8-lead (150-mil) SOIC Package
P2041A
E
H
D
A2
A
e B A 1
C L
D
Dimensions
Symbol Min
A1 A A2 B C D E e H L
Inches Max
0.010 0.069 0.059 0.020 0.010 0.004 0.053 0.049 0.012 0.007
Millimeters Min Max
0.10 1.35 1.25 0.31 0.18 4.90 BSC 3.91 BSC 1.27 BSC 6.00 BSC 0.41 0 1.27 8 0.25 1.75 1.50 0.51 0.25
0.193 BSC 0.154 BSC 0.050 BSC 0.236 BSC 0.016 0 0.050 8
Versatile EMI Reduction IC
Notice: The information in this document is subject to change without notice.
5 of 8
November 2006 rev 0.2
P2041A
8-lead TSSOP (4.40-MM Body)
H
E D A2 A e B A1 L C
Dimensions Symbol Min
A A1 A2 B c D E e H L 0.020 0 0.002 0.033 0.008 0.004 0.114 0.169 0.026 BSC 0.252 BSC 0.028 8 0.50 0
Inches Max
0.043 0.006 0.037 0.012 0.008 0.122 0.177 0.05 0.85 0.19 0.09 2.90 4.30
Millimeters Min Max
1.10 0.15 0.95 0.30 0.20 3.10 4.50 0.65 BSC 6.40 BSC 0.70 8
Versatile EMI Reduction IC
Notice: The information in this document is subject to change without notice.
6 of 8
November 2006 rev 0.2
Ordering Information Part number
P2041AF-08ST P2041AF-08SR P2041AF-08TT P2041AF-08TR P2041AG-08ST P2041AG-08SR P2041AG-08TT P2041AG-08TR I2041AF-08ST I2041AF-08SR I2041AF-08TT I2041AF-08TR I2041AG-08ST I2041AG-08SR I2041AG-08TT I2041AG-08TR
P2041A
Marking
P2041AF P2041AF P2041AF P2041AF P2041AG P2041AG P2041AG P2041AG I2041AF I2041AF I2041AF I2041AF I2041AG I2041AG I2041AG I2041AG
Package Configuration
8-Pin SOIC, Tube, Pb Free 8-Pin SOIC, Tape and Reel, Pb Free 8-Pin TSSOP, Tube, Pb Free 8-Pin TSSOP, Tape and Reel, Pb Free 8-Pin SOIC, Tube, Green 8-Pin SOIC, Tape and Reel, Green 8-Pin TSSOP, Tube, Green 8-Pin TSSOP, Tape and Reel, Green 8-Pin SOIC, Tube, Pb Free 8-Pin SOIC, Tape and Reel, Pb Free 8-Pin TSSOP, Tube, Pb Free 8-Pin TSSOP, Tape and Reel, Pb Free 8-Pin SOIC, Tube, Green 8-Pin SOIC, Tape and Reel, Green 8-Pin TSSOP, Tube, Green 8-Pin TSSOP, Tape and Reel, Green
Temperature Range
Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial
Device Ordering Information
P2041A
F-08
ST
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 (0C to 70C) I = Industrial Temperature Range (-40C to 85C)
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
November 2006 rev 0.2
P2041A
PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200 Campbell, CA 95008 Tel: 408-879-9077 Fax: 408-879-9018 www.pulsecoresemi.com
Copyright (c) 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
(c) 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.
8 of 8

▲Up To Search▲

Price & Availability of I2041AF-08SR

	To Download I2041AF-08SR Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .