P1819BG-08ST 概述
Notebook LCD Panel EMI Reduction IC 笔记本电脑液晶面板降低EMI IC
P1819BG-08ST 数据手册
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PDF下载November 2005
rev 1.7
P1819
Notebook LCD Panel EMI Reduction IC
Features
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 low EMI Spread Spectrum clock and a
non-spread reference clock of the input frequency.
Optimized for Frequency range from 20 to 40MHz.
Internal loop filter minimizes external components
and board space.
The P1819 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’.
Selectable spread options: Down and Center.
Low Inherent Cycle-to-Cycle jitter.
Eight spread % selections: ±0.625% to –3.5%.
3.3V ± 0.3V Operating Voltage range.
Low power CMOS design.
The P1819 uses the most efficient and optimized
modulation profile approved by the FCC and is
implemented in a proprietary all digital method.
Supports notebook VGA and other LCD timing
controller applications.
Power Down function for mobile application.
Available in Commercial temperature range.
Available in 8-pin SOIC and TSSOP Packages.
Applications
Product Description
The P1819 is targeted towards EMI management for
memory and LVDS interfaces in mobile graphic chipsets
and high-speed digital applications such as PC peripheral
devices, consumer electronics, and embedded controller
systems.
The P1819 is a Versatile Spread Spectrum Frequency
Modulator designed specifically for input clock frequencies
from 20 to 40MHz. (Refer Input Frequency and Modulation
Rate Table). The P1819 reduces electromagnetic
interference (EMI) at the clock source, allowing system
wide reduction of EMI of down stream clock and data
dependent signals. The P1819 allows significant system
cost savings by reducing the number of circuit board layers
VDD
SRS
D_C/NC PD#
Block Diagram
PLL
Modulation
XIN/CLKIN
Frequenc
y
Crystal
Oscillator
Output
Divider
Phase
Loop
Filter
VCO
Detector
XOUT
REF
Feedback
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.
November 2005
P1819
rev 1.7
Pin Configuration
XOUT
XOUT
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
XIN/ CLKIN
XIN / CLKIN
VSS
VSS
SRS
VDD
PD#
REF
VDD
PD#
REF
P1819 A/B/C/D
P1819 E/F/G/H/Q
D_C / NC
ModOUT
ModOUT
Pin Description
Pin#
1819A/B/C/D 1819E/F/G/H/Q
Pin Name
Type
Description
Crystal Connection or external frequency input.This pin
has dual functions. It can be connected to either an
external crystal or an external reference clock
1
2
3
1
2
XIN / CLKIN
VSS
I
P
I
Ground Connection. Connect to system ground.
Spread range select. Digital logic input used to select
frequency deviation (Refer Spread Deviation Selection
Table). This pin has an internal pull-up resistor.
Digital logic input used to select Down (LOW) or Center
(HIGH) spread options (Refer Spread Deviation
Selection Table). This pin has an internal pull-up
resistor.
SRS
3
D_C / NC
I
Spread spectrum clock output. (Refer Input Frequency
and Modulation Rate Table and Spread Deviation
Selection Table)
4
5
4
5
ModOUT
REF
O
O
Non-modulated Reference clock output of the input
frequency.
Power down control pin. Pull LOW to enable Power-
Down mode. This pin has an internal pull-up resistor.
6
7
6
7
PD#
VDD
I
P
Power Supply for the entire chip.
Crystal Connection. Input connection for an external
crystal. If using an external reference, this pin must be
left unconnected.
8
8
XOUT
O
Note: Pin 3 is NC in P1819Q
Note Book LCD Panel EMI Reduction IC
2 of 9
Notice: The information in this document is subject to change without notice.
November 2005
P1819
rev 1.7
Input Frequency and Modulation Rate
Part Number
Input Frequency Range
Output Frequency range
Modulation rate
P1819
20MHz to 40MHz
20MHz to 40MHz
Input Frequency / 512
Spread Deviation Selection
Part Number
SRS
D_C
Spread Deviation
-2.50% (DOWN)
-3.50% (DOWN)
-1.25% (DOWN)
-1.75% (DOWN)
±1.25% (CENTER)
±1.75% (CENTER)
±0.625% (CENTER)
±0.875% (CENTER)
-1.25% (DOWN)
±0.625% (CENTER)
-2.5% (DOWN)
0
1
0
1
0
1
0
1
P1819A
NA
P1819B
P1819C
P1819D
P1819E
P1819F
P1819G
NA
NA
NA
0
1
NA
NA
NA
0
1
±1.25% (CENTER)
-1.75% (DOWN)
±0.875% (CENTER)
-3.5% (DOWN)
0
1
0
P1819H
P1819Q
NA
NA
1
±1.75% (CENTER)
-2.5% (DOWN)
NA
Absolute Maximum Ratings
Symbol
Parameter
Rating
-0.5 to +7.0
-65 to +125
0 to 70
Unit
V
°C
°C
°C
°C
VDD, VIN
TSTG
TA
Voltage on any pin with respect to Ground
Storage temperature
Operating temperature
Ts
TJ
Max. Soldering Temperature (10 sec)
Junction Temperature
260
150
Static Discharge Voltage
TDV
2
KV
(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.
Note Book LCD Panel EMI Reduction IC
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Notice: The information in this document is subject to change without notice.
November 2005
rev 1.7
P1819
DC Electrical Characteristics
(Test condition: All parameters are measured at room temperature (+25°C) unless otherwise stated)
Symbol
VIL
Parameter
Min
Typ
Max
Unit
Input Low voltage
Input High voltage
VSS – 0.3
-
-
-
-
-
-
-
-
0.8
V
VIH
2.0
VDD + 0.3
-20.0
1.0
V
µA
µA
mA
mA
V
IIL
Input Low current (inputs D_C, PD#, SRS)
Input High current
-60.0
IIH
-
2.0
-
IXOL
IXOH
VOL
VOH
XOUT Output low current @ 0.4V, VDD = 3.3V
XOUT Output high current @ 2.5V, VDD = 3.3V
Output Low voltage VDD = 3.3V, IOL = 20mA
Output High voltage VDD = 3.3V, IOH = 20mA
12.0
12.0
0.4
-
2.5
-
V
Dynamic supply current normal mode
3.3V and 25pF probe loading
7.1
26.9
ICC
-
mA
fIN - min
fIN - max
IDD
Static supply current standby mode
-
3.0
-
4.5
3.3
-
3.6
-
mA
V
VDD
tON
Operating Voltage
Power up time (first locked clock cycle after power up)
Clock Output impedance
0.18
50
mS
Ω
ZOUT
-
-
AC Electrical Characteristics
Symbol
Parameter
Min
20
Typ
-
Max
40
Unit
MHz
fIN
Input Frequency
fOUT
Output Frequency
20
-
40
MHz
Output Rise time
tLH*
tHL*
-
-
0.66
0.65
-
-
nS
nS
Measured from 0.8V to 2.0V
Output Fall time
Measured from 2.0V to 0.8V
tJC
tD
Jitter (cycle to cycle)
Output Duty cycle
-200
45
-
50
200
55
pS
%
*tLH and tHL are measured into a capacitive load of 15pF
Note Book LCD Panel EMI Reduction IC
4 of 9
Notice: The information in this document is subject to change without notice.
November 2005
P1819
rev 1.7
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
Note: Controlling dimensions are millimeters
SOIC – 0.074 grams unit weight
Note Book LCD Panel EMI Reduction IC
5 of 9
Notice: The information in this document is subject to change without notice.
November 2005
rev 1.7
P1819
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
0.002
0.033
0.008
0.004
0.114
0.169
0.05
0.85
0.19
0.09
2.90
4.30
0.15
0.95
0.30
0.20
3.10
4.50
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
Note: Controlling dimensions are millimeters
TSSOP – 0.0325 grams unit weight
Note Book LCD Panel EMI Reduction IC
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Notice: The information in this document is subject to change without notice.
November 2005
P1819
rev 1.7
Ordering Codes
Input
Frequency
Deviation
(%)
Qty /
reel
Pb
Part Number Marking Frequency
(MHz)
Package Type
Temperature
Free
P1819A-08ST
P1819A-08SR
P1819A-08TT
P1819A-08TR
P1819AF-08ST
P1819AF-08SR
P1819AF-08TT
P1819AF-08TR
P1819AG-08ST
P1819A
20-40
20-40
20-40
20-40
20-40
20-40
20-40
20-40
20-40
20-40
20-40
20-40
20-40
20-40
20-40
20-40
20-40
20-40
20-40
20-40
20-40
20-40
20-40
20-40
-2.5,-3.5
8-pin SOIC, tube
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
8-pin SOIC, tape &
P1819A
-2.5,-3.5
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
reel
P1819A
-2.5,-3.5
8-pin TSSOP, tube
8-pin TSSOP, tape
P1819A
-2.5,-3.5
and reel
P1819AF
P1819AF
P1819AF
P1819AF
P1819AG
-2.5,-3.5
8-pin SOIC, tube
Pb Free
Pb Free
Pb Free
Pb Free
Green
8-pin SOIC, tape &
-2.5,-3.5
reel
-2.5,-3.5
8-pin TSSOP, tube
8-pin TSSOP, tape
-2.5,-3.5
and reel
-2.5,-3.5
8-pin SOIC, tube
8-pin SOIC, tape &
P1819AG-08SR P1819AG
P1819AG-08TT P1819AG
P1819AG-08TR P1819AG
-2.5,-3.5
Green
reel
-2.5,-3.5
8-pin TSSOP, tube
Green
8-pin TSSOP, tape
-2.5,-3.5
Green
and reel
P1819B-08ST
P1819B-08SR
P1819B-08TT
P1819B-08TR
P1819BF-08ST
P1819BF-08SR
P1819BF-08TT
P1819BF-08TR
P1819BG-08ST
P1819B
P1819B
-1.25, -1.75
-1.25, -1.75
-1.25, -1.75
-1.25, -1.75
-1.25, -1.75
-1.25, -1.75
-1.25, -1.75
-1.25, -1.75
-1.25, -1.75
-1.25, -1.75
-1.25, -1.75
-1.25, -1.75
8-pin SOIC, tube
8-pin SOIC, tape &
reel
P1819B
8-pin TSSOP, tube
8-pin TSSOP, tape
P1819B
and reel
P1819BF
P1819BF
P1819BF
P1819BF
P1819BG
8-pin SOIC, tube
Pb Free
Pb Free
Pb Free
Pb Free
Green
8-pin SOIC, tape &
reel
8-pin TSSOP, tube
8-pin TSSOP, tape
and reel
8-pin SOIC, tube
8-pin SOIC, tape &
P1819BG-08SR P1819BG
P1819BG-08TT P1819BG
P1819BG-08TR P1819BG
Green
reel
8-pin TSSOP, tube
Green
8-pin TSSOP, tape
Green
and reel
Products are available for industrial temperature range operation. Please contact factory for more information.
Note Book LCD Panel EMI Reduction IC
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Notice: The information in this document is subject to change without notice.
November 2005
P1819
rev 1.7
Device Ordering Information
X
1
1819
2
X
3
X
4
-08
5
XX
6
1. Flow Prefix:
2. Device Number.
a. I = Industrial temperature range
3. Deviation (%) and spread option identifier.
4. Lead Free parts
(-40°C to 85°C).
5. Device pin count.
b. P = Commercial temperature range
6. Package Identifier.
(0°C to 70°C).
P 1 8 1 9 A F - 0 8 X X
SR - SOIC, T/R
TT – TSSOP, TUBE
TR - TSSOP, T/R
ST – SOIC, TUBE
F =Lead Free and and RoHS compliant part
G = Green
Flow:
P = Commercial Temperature Range (0°C to 70°C)
I = Industrial Temperature Range (-40°C to 85°C)
Licensed under US patent #5,488,627, #6,646,463 and #5,631,920.
Note Book LCD Panel EMI Reduction IC
8 of 9
Notice: The information in this document is subject to change without notice.
November 2005
rev 1.7
P1819
Alliance Semiconductor Corporation
2575 Augustine Drive,
Santa Clara, CA 95054
Tel# 408-855-4900
Copyright © Alliance Semiconductor
All Rights Reserved
Preliminary Information
Part Number: P1819
Document Version: v1.7
Fax: 408-855-4999
www.alsc.com
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 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 Alliance 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 Alliance's Terms and Conditions of Sale (which are available from Alliance).
All sales of Alliance products are made exclusively according to Alliance's Terms and Conditions of Sale. The purchase of
products from Alliance does not convey a license under any patent rights, copyrights; mask works rights, trademarks, or any
other intellectual property rights of Alliance or third parties. Alliance 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 Alliance products in such life-supporting systems implies that the manufacturer
assumes all risk of such use and agrees to indemnify Alliance against all claims arising from such use.
Note Book LCD Panel EMI Reduction IC
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Notice: The information in this document is subject to change without notice.
P1819BG-08ST 相关器件
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