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부품번호 | P1817B 기능 |
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기능 | Low-Power Mobile VGA EMI Reduction IC | ||
제조업체 | ON Semiconductor | ||
로고 | |||
전체 7 페이지수
P1817A, P1817B
Product Preview
Low-Power Mobile VGA EMI
Reduction IC
Description
The P1817 is a versatile spread spectrum frequency modulator
designed specifically for input clock frequencies. The P1817 reduces
electromagnetic interference (EMI) at the clock source, allowing
system wide reduction of EMI of down stream clock and data
dependent signals. The P1817 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.
The P1817 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.’
The P1817 uses the most efficient and optimized modulation profile
approved by the FCC and is implemented in a proprietary all digital
method.
http://onsemi.com
SOIC−8
S SUFFIX
CASE 751BD
TSSOP−8
T SUFFIX
CASE 948AL
PIN CONFIGURATION
1
CLKIN / XIN
XOUT
VSS
VDD
SR0 REF
SSON / SBM
ModOUT
Applications
The P1817 is targeted towards notebook LCD displays, and other
displays using an LVDS interface, PC peripheral devices, and
embedded systems.
Features
• FCC Approved Method of EMI Attenuation
• Generates a Low EMI Spread Spectrum Clock of the Input Frequency
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
• Optimized for Frequency Range from:
• P1817A – 20 to 32 MHz
• P1817B – 10 to 20 MHz
• Internal Loop Filter Minimizes External Components and Board Space
• Two Selectable Spread Ranges
• Low Inherent Cycle−to−Cycle Jitter
• 3.3 V or 5 V Operating Voltage Range
• TTL or CMOS Compatible Inputs and Outputs
• Ultra−low Power CMOS Design
• 3.17 mA @ 3.3 V, 10 MHz | 6.20 mA @ 5.0 V, 10 MHz
• 4.28 mA @ 3.3 V, 14 MHz | 7.50 mA @ 5.0 V, 14 MHz
• 5.50 mA @ 3.3 V, 20 MHz | 9.50 mA @ 5.0 V, 20 MHz
• Supports Notebook VGA and Other LCD Timing Controller Applications
• SSON / SBM Pin for Spread Spectrum On/Off and Standby Mode Controls
• Available in 8−pin SOIC and TSSOP
• These are Pb−Free Devices
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
© Semiconductor Components Industries, LLC, 2011
August, 2011 − Rev. P3
1
Publication Order Number:
P1817A/D
P1817A, P1817B
Table 6. SPREAD RANGE SELECTION, VDD = 5 V
CLKIN Frequency
SR0
10 MHz
1
0
14.318 MHz
1
0
15 MHz
1
0
20 MHz
1
0
Table 7. SPREAD RANGE SELECTION, VDD = 3.3 V
CLKIN Frequency
SR0
10 MHz
1
0
14.318 MHz
1
0
15 MHz
1
0
20 MHz
1
0
Spreading Range
±1.50%
±1.90%
±1.36%
±1.64%
±1.30%
±1.50%
±0.95%
±1.125%
Spreading Range
±1.50%
±1.65%
±1.40%
±1.70%
±1.37%
±1.63%
±1.10%
±1.28%
Modulation Rate
(CLKIN/10) * 20.83 KHz
Modulation Rate
(CLKIN/10) * 20.83 KHz
Crystal
27 pF
GND
VDD
0W
VDD
0W
0W
Use either pull−up or pull−down
Resistor with 0 W.
0W
1 CLKIN / XIN XOUT 8
2 VSS
VDD
P1817A/B
3 SR0
REF
7
0.1 mF
6
4
SSON /
SBM
ModOUT 5
27 pF
GND
VDD
Ferrite Bead
GND
0.1 mF
GND
Reference clock output.
Pull pin 4 low to turn Spread Spectrum
OFF and enable Standby Mode (Note 2).
10 to 20 MHz and 20 to 32 MHz
EMI reduced clock output.
Figure 2. Schematic for Notebook VGA Application
2. To set the P1817 to standby mode, disable the input clock (pin 1, CLKIN) and pull pin 4 SSON / SBM low.
http://onsemi.com
4
4페이지 P1817A, P1817B
Table 8. ORDERING INFORMATION
Part Number
Marking
Input Frequency (MHz)
P1817A−08ST
P1817A
20−32
P1817AF−08ST
P1817AF
20−32
I1817A−08SR
I1817A
20−32
I1817BF−08SR
I1817BF
10−20
Package Type
8−pin SOIC, tube
8−pin SOIC, tube, pb free
8−pin SOIC, tape and reel
8−pin SOIC, tape and reel, pb free
Temperature (5C)
0 to 70
0 to 70
−20 to +85
−20 to +85
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT:
Literature Distribution Center for ON Semiconductor
P.O. Box 5163, Denver, Colorado 80217 USA
Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada
Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada
Email: [email protected]
N. American Technical Support: 800−282−9855 Toll Free
USA/Canada
Europe, Middle East and Africa Technical Support:
Phone: 421 33 790 2910
Japan Customer Focus Center
Phone: 81−3−5773−3850
http://onsemi.com
7
ON Semiconductor Website: www.onsemi.com
Order Literature: http://www.onsemi.com/orderlit
For additional information, please contact your local
Sales Representative
P1817A/D
7페이지 | |||
구 성 | 총 7 페이지수 | ||
다운로드 | [ P1817B.PDF 데이터시트 ] |
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부품번호 | 상세설명 및 기능 | 제조사 |
P1817A | Low-Power Mobile VGA EMI Reduction IC | Alliance Semiconductor |
P1817A | Low-Power Mobile VGA EMI Reduction IC | ON Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |