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Part Name :

I1819GF-08TR View Datasheet(PDF) - Alliance Semiconductor

Part NameI1819GF-08TR ALSC
Alliance Semiconductor ALSC
DescriptionNotebook LCD Panel EMI Reduction IC
I1819GF-08TR Datasheet PDF : 9 Pages
1 2 3 4 5 6 7 8 9
November 2005
P1819
rev 1.7
Ordering Codes
Part Number
Input
Marking Frequency
(MHz)
Frequency
Deviation
(%)
Package Type
P1819A-08ST
P1819A
20-40
-2.5,-3.5
8-pin SOIC, tube
P1819A-08SR
P1819A
20-40
-2.5,-3.5
8-pin SOIC, tape &
reel
P1819A-08TT
P1819A
20-40
-2.5,-3.5
8-pin TSSOP, tube
P1819A-08TR
P1819A
20-40
-2.5,-3.5
8-pin TSSOP, tape
and reel
P1819AF-08ST P1819AF
20-40
-2.5,-3.5
8-pin SOIC, tube
P1819AF-08SR P1819AF
20-40
-2.5,-3.5
8-pin SOIC, tape &
reel
P1819AF-08TT P1819AF
20-40
-2.5,-3.5 8-pin TSSOP, tube
P1819AF-08TR P1819AF
20-40
-2.5,-3.5
8-pin TSSOP, tape
and reel
P1819AG-08ST P1819AG
20-40
-2.5,-3.5
8-pin SOIC, tube
P1819AG-08SR P1819AG
20-40
-2.5,-3.5
8-pin SOIC, tape &
reel
P1819AG-08TT P1819AG
20-40
-2.5,-3.5 8-pin TSSOP, tube
P1819AG-08TR P1819AG
20-40
-2.5,-3.5
8-pin TSSOP, tape
and reel
P1819B-08ST
P1819B
20-40
-1.25, -1.75 8-pin SOIC, tube
P1819B-08SR
P1819B
20-40
-1.25, -1.75
8-pin SOIC, tape &
reel
P1819B-08TT
P1819B
20-40
-1.25, -1.75 8-pin TSSOP, tube
P1819B-08TR
P1819B
20-40
-1.25, -1.75
8-pin TSSOP, tape
and reel
P1819BF-08ST P1819BF
20-40
-1.25, -1.75 8-pin SOIC, tube
P1819BF-08SR P1819BF
20-40
-1.25, -1.75
8-pin SOIC, tape &
reel
P1819BF-08TT P1819BF
20-40
-1.25, -1.75 8-pin TSSOP, tube
P1819BF-08TR P1819BF
20-40
-1.25, -1.75
8-pin TSSOP, tape
and reel
P1819BG-08ST P1819BG
20-40
-1.25, -1.75 8-pin SOIC, tube
P1819BG-08SR P1819BG
20-40
-1.25, -1.75
8-pin SOIC, tape &
reel
P1819BG-08TT P1819BG
20-40
-1.25, -1.75 8-pin TSSOP, tube
P1819BG-08TR P1819BG
20-40
-1.25, -1.75
8-pin TSSOP, tape
and reel
Products are available for industrial temperature range operation. Please contact factory for more information.
Qty /
reel
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
Pb
Free
Temperature
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
Pb Free 0°C to 70°C
Pb Free 0°C to 70°C
Pb Free 0°C to 70°C
Pb Free 0°C to 70°C
Green 0°C to 70°C
Green 0°C to 70°C
Green 0°C to 70°C
Green 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
Pb Free 0°C to 70°C
Pb Free 0°C to 70°C
Pb Free 0°C to 70°C
Pb Free 0°C to 70°C
Green 0°C to 70°C
Green 0°C to 70°C
Green 0°C to 70°C
Green 0°C to 70°C
Note Book LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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Product Description
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 ferrite beads, shielding and other passive components that are traditionally required to pass EMI regulations. 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’.
The P1819 uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all digital method.

Features
▪ 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.
▪ 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.
▪ 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
  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.

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