P2814-A-08SR [ALSC]
160MHz, OTHER CLOCK GENERATOR, PDSO8, SOIC-8;
| 型号： | P2814-A-08SR |
| 厂家： | 
ALLIANCE SEMICONDUCTOR CORPORATION |
| 描述： | 160MHz, OTHER CLOCK GENERATOR, PDSO8, SOIC-8 时钟 光电二极管 外围集成电路 晶体 |
| 文件： | 总8页 (文件大小：209K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PRELIMINARY Specification
P2811/12/14
Alliance Semiconductor
Low Power EMI Reduction IC
FEATURES
·
Low inherent cycle-to-cycle jitter
8 spread % selections: +/-0.625% to –3.5%
3.3V operating voltage
·
·
·
FCC approved method of EMI attenuation
·
·
·
·
Provides up to 15 dB EMI Reduction
Generates 1X, 2X, and 4X low EMI spread
spectrum clock of the input frequency
1X: P2811, 2X: P2812, 4X: P2814
CMOS/TTL compatible inputs and outputs
Ultra low power CMOS design
TBD mA @3.3V, 10 MHz
TBD mA @3.3V, 27 MHz
TBD mA @3.3V, 40MHz
·
Optimized for input frequency range from
10 MHz to 40 MHz
P2811: 10 MHz to 40 MHz
P2812: 10 MHz to 40 MHz
P2814: 10 MHz to 40 MHz
·
·
Products are available for Industrial
Temperature Range
·
·
Internal loop filter minimizes external
components and board space
Available in 8 pin SOIC and TSSOP
Selectable spread options: Down Spread and
Center Spread
PRODUCT DESCRIPTION
The P28XX is a versatile spread spectrum
frequency modulator designed specifically for
input clock frequencies from 10 MHz to 40 MHz
(see Table 1). The P28XX can generate an EMI
reduced clock from crystal, ceramic resonator, or
system clock. The P28XX-A and -B offers various
combinations of spread options and percentage
deviations (see Table 2). These combinations
include Down Spread, Center Spread and
percentage deviation range from +/-0.625% to -
3.50%.
The P28XX modulates the output of a single PLL
in order to “spread” the bandwidth of
a
synthesized clock, thereby decreasing 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 clock generators. Lowering EMI by
increasing a signal’s bandwidth is called “spread
spectrum clock generation”.
The P28XX uses the most efficient and optimized
modulation profile approved by the FCC and is
implemented by using a proprietary all-digital
method.
The P28XX reduces electromagnetic interference
(EMI) at the clock source, allowing a system wide
EMI reduction for all the down stream clocks and
data dependent signals.
The P28XX allows
APPLICATIONS
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 P28XX is targeted towards EMI management
for memory interfaces in mobile graphic chipsets
and high-speed digital applications such as PC
peripheral devices, consumer electronics, and
embedded controller systems.
May, 2002
Revision B
PulseCore – A Division of Alliance Semiconductor
3160 De La Cruz Blvd., Suite 200 • Santa Clara • CA • 95054
Tel (408) 748-6988 • Fax (408) 748-0009
http://www.pulsecore.com
1 of 1
PRELIMINARY Specification
P2811/12/14
Alliance Semiconductor
Figure 1 - Pin Diagram
1
2
3
4
8
7
6
5
XIN
VSS
D_C
XOUT
VDD
FRS
P2811-A/B
P2812-A/B
P2814-A/B
SRS
ModOut
Figure 2 – P28XX Block Diagram
VDD
D_C SRS FRS
PLL
Modulation
XIN
Crystal
Oscillator
Frequency
Divider
Output
Divider
Phase
Detector
Loop
Filter
XOUT
VCO
Feedback
Divider
ModOUT
P28XX Block Diagram
VSS
Table 1 - Input/Output Frequency Range Selections
PIN 6
Part Number
P2812 (2X)
Input Output Input
P2811 (1X)
P2814 (4X)
Output Input Output
FRS
(MHz) (MHz)
10-20 10-20
20-40 20-40
(MHz) (MHz)
10-20 20-40
20-40 40-80
(MHz) (MHz)
10-20 40-80
20-40 80-160
0
1
Apr., 2002
Revision A
PulseCore, a Division of Alliance Semiconductor
3160 De La Cruz Blvd., Suite 200 • Santa Clara • CA • 95054
Tel (408) 748-6988 • Fax (408) 748-0009
2of 6
http://www.pulsecore.com; http://www.alsc.com
PRELIMINARY Specification
P2811/12/14
Alliance Semiconductor
Table 2 - Output Frequency Deviation and Spread Option Selections
PIN 3 PIN 4 Output Frequency Modulation
Part
Number
D_C
SRS Deviation and
Spread Option
Rate
0
0
1
1
0
1
0
1
-2.50% (Down)
-3.50% (Down)
+/-1.25% (Center)
+/-1.75% (Center)
TBD KHz
P2811/12/14-A
0
0
1
1
0
1
0
1
-1.25% (Down)
-1.75% (Down)
+/-0.625% (Center)
+/-0.875% (Center)
TBD KHz
P2811/12/14-B
PIN DESCRIPTION
PIN # Name
Type Description
1
2
3
XIN
VSS
D_C
I
P
I
Connect to externally generated clock signal or crystal.
Ground Connection. Connect to system ground.
Digital logic input used to select Down (LOW) or Center (HIGH) Spread
Options (see Table 2). This pin has an internal pull-up resistor.
Spread Range Selection. Digital logic input used to select frequency
deviation (see Table 2). This pin has an internal pull-up resistor.
Spread Spectrum clock output (see Table 1 and Table 2).
Frequency Range Selection. Digital logic input used to select input
frequency range (see Table 1). This pin has an internal pull-up resistor.
Connect to +3.3V
4
SRS
I
5
6
ModOut
FRS
O
I
7
8
VDD
XOUT
P
I
Connect to crystal. No connect if externally generated clock signal is
used.
May, 2002
Revision B
PulseCore – A Division of Alliance Semiconductor
3160 De La Cruz Blvd., Suite 200 • Santa Clara • CA • 95054
Tel (408) 748-6988 • Fax (408) 748-0009
http://www.pulsecore.com
3 of 3
PRELIMINARY Specification
P2811/12/14
Alliance Semiconductor
EMC SOFTWARE SIMULATION
By using PulseCore’s proprietary EMC simulation software – EMI-lator®, radiated system level EMI analysis
can be made easier, allowing quantitative measure on the benefits of PulseCore’s EMI reduction products.
The simulation engine of this EMC software has already been characterized to correlate with the electrical
characteristics of PulseCore EMI reduction IC’s. Figure 3 below is an example of the simulation result.
Please visit our web site at www.pulsecore.com for information on how to obtain a free copy and
demonstration of EMI-lator®.
Figure 3 - Simulation Result from EMI-lator®
May, 2002
Revision B
PulseCore – A Division of Alliance Semiconductor
3160 De La Cruz Blvd., Suite 200 • Santa Clara • CA • 95054
Tel (408) 748-6988 • Fax (408) 748-0009
http://www.pulsecore.com
4 of 4
PRELIMINARY Specification
P2811/12/14
Alliance Semiconductor
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Rating
Unit
VDD, VIN
Voltage on any pin with respect to GND
-0.5 to +7.0
V
TSTG
TA
Storage Temperature
-65 to +125
0 to +70
ºC
ºC
Operating Temperature
DC ELECTRICAL CHARACTERISTICS
Symbol
Parameter
Min
Typ
Max
Unit
VIL
VIH
IIL
Input Low Voltage
Input High Voltage
GND – 0.3
-
-
-
TBD
V
V
TBD
-
VDD + 0.3
TBD
Input Low Current (pull-up resistor on inputs
SR0, 1)
mA
IIH
Input High Current (pull-down resistor on
input SSON)
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 = 20 mA)
Output High Voltage
(VDD=3.3V, IOH = 20 mA)
Static Supply Current
Standby Mode
-
-
TBD
mA
mA
mA
V
IXOL
IXOH
VOL
VOH
IDD
-
TBD
TBD
-
-
-
-
-
TBD
-
TBD
-
-
-
V
TBD
mA
mA
ICC
Dynamic Supply Current
Normal Mode (3.3V and 10 pF loading)
Operating Voltage
TBD
fIN-min
TBD
-
TBD
fIN-typ
3.3
TBD
fIN-max
TBD
-
VDD
tON
V
mS
Power Up Time
TBD
(First locked clock cycle after power up)
ZOUT
Clock Output Impedance
-
TBD
-
W
AC ELECTRICAL CHARACTERISTICS
Symbol
Parameter
Min
Typ
Max
Unit
fIN
10
10
20
40
40
40
MHz
MHz
MHz
MHz
ns
Input Frequency P2811/12/14
Outout Frequency P2811
Outout Frequency P2812
Outout Frequency P2814
-
fOUT
-
80
-
-
160
tLH
Output Rise Time
TBD
Note 1
(measured at 0.8V to 2.0V)
tHL
Output Fall Time
TBD
ns
Note 1
tJC
(measured at 2.0V to 0.8V)
Jitter (cycle to cycle)
-
-
TBD
ps
%
tD
Output Duty Cycle
TBD
Note1: tLH and tHL are measured into a capacitive load of 15pF
May, 2002
Revision B
PulseCore – A Division of Alliance Semiconductor
3160 De La Cruz Blvd., Suite 200 • Santa Clara • CA • 95054
Tel (408) 748-6988 • Fax (408) 748-0009
http://www.pulsecore.com
5 of 5
PRELIMINARY Specification
P2811/12/14
Alliance Semiconductor
Figure 4 - Mechanical Package Outline (8 Pin SOIC)
C
L
INCHES
MILLIMETERS
SYMBOL MIN
NOR MAX MIN NOR MAX
P28xx-x
LOT NUMBER
YYWW
0.057 0.064 0.071 1.45 1.63 1.80
0.004 0.007 0.010 0.10 0.18 0.25
0.053 0.061 0.069 1.35 1.55 1.75
0.012 0.016 0.020 0.31 0.41 0.51
0.004 0.006 0.001 0.10 0.15 0.25
0.186 0.194 0.202 4.72 4.92 5.12
0.148 0.156 0.164 3.75 3.95 4.15
A
A1
A2
B
C
D
E
H
a
D
E
0.050 BSC
1.27 BSC
e
0.224 0.236 0.248 5.70 6.00 6.30
0.012 0.020 0.028 0.30 0.50 0.70
H
L
a
A
A2
A1
0°
5°
8°
0°
5°
8°
Note: Controlling dimensions are millimeters.
B
e
Figure 5 - Mechanical Package Outline (8 Pin TSSOP)
C
INCHES
MILLIMETERS
SYMBOL MIN
NOR MAX MIN NOR MAX
L
-
-
-
0.047
0.006 0.05
-
-
-
1.10
0.15
A
A1
A2
B
0.002
H
0.031 0.039 0.041 0.80 1.00 1.05
0.007
0.004
E
-
-
0.012 0.19
0.008 0.09
-
-
0.30
0.20
C
0.114 0.118 0.122 2.90 3.00 3.10
0.169 0.173 0.177 4.30 4.40 4.50
D
E
a
0.026 BSC
0.65 BSC
e
D
0.244 0.252 0.260 6.20 6.40 6.60
0.018 0.024 0.030 0.45 0.60 0.75
H
L
0°
-
8°
0°
-
8°
a
A
A2
A1
Note: Controlling dimensions are millimeters.
B
e
May, 2002
Revision B
PulseCore – A Division of Alliance Semiconductor
3160 De La Cruz Blvd., Suite 200 • Santa Clara • CA • 95054
Tel (408) 748-6988 • Fax (408) 748-0009
http://www.pulsecore.com
6 of 6
PRELIMINARY Specification
P2811/12/14
Alliance Semiconductor
Ordering Information:
X 2811-X- 08 XX
Package
ST=SOIC in Tube
SR=SOIC in Tape and Reel
TT=TSSOP in Tube
TR=TSSOP in Tape and Reel
Device Pin Count
Deviation (%) and Spread Option Identifier
Device Number
Flow
P=Commercial Temperature Range (0°C TO 70°C)
I =Industrial Temperature Range (-25°C TO 85°C)
Ordering
Number
Marking
Input
Output
Frequency
Package
Type
Qty. /
Reel
Temp.*
(NOTE)
Frequency Frequency Deviation
(MHz)
(MHz)
P2811-A-08ST
P2811-A-08SR
P2811-A-08TT
P2811-A-08TR
P2811-A
P2811-A
P2811-A
P2811-A
10 – 40
10 – 40
8 SOIC
TUBE
8 SOIC
TAPE/REEL
8 TSSOP
TUBE
8 TSSOP
TAPE/REEL
0°C TO
70°C
0°C TO
70°C
0°C TO
70°C
0°C TO
70°C
-2.50%
(Down)
-3.50%
(Down)
+/-1.25%
(Center)
+/-1.75%
(Center)
10 – 40
10 – 40
10 – 40
10 – 40
10 – 40
10 – 40
2,500
2,500
P2811-B-08ST
P2811-B-08SR
P2811-B-08TT
P2811-B-08TR
P2811-B
P2811-B
P2811-B
P2811-B
10 – 40
10 – 40
10 – 40
10 – 40
10 – 40
10 – 40
10 – 40
10 – 40
8 SOIC
TUBE
8 SOIC
TAPE/REEL
8 TSSOP
TUBE
8 TSSOP
TAPE/REEL
0°C TO
70°C
0°C TO
70°C
0°C TO
70°C
0°C TO
70°C
-1.25%
(Down)
-1.75%
(Down)
+/-0.625%
(Center)
+/-0.875%
(Center)
2,500
2,500
P2812-A-08ST
P2812-A-08SR
P2812-A-08TT
P2812-A-08TR
P2812-A
P2812-A
P2812-A
P2812-A
10 – 40
10 – 40
10 – 40
10 – 40
20 – 80
20 – 80
20 – 80
20 – 80
8 SOIC
TUBE
8 SOIC
TAPE/REEL
8 TSSOP
TUBE
8 TSSOP
TAPE/REEL
0°C TO
70°C
0°C TO
70°C
0°C TO
70°C
0°C TO
70°C
-2.50%
(Down)
-3.50%
(Down)
+/-1.25%
(Center)
+/-1.75%
(Center)
2,500
2,500
P2812-B-08ST
P2812-B-08SR
P2812-B-08TT
P2812-B-08TR
P2812-B
P2812-B
P2812-B
P2812-B
10 – 40
10 – 40
10 – 40
10 – 40
20 – 80
20 – 80
20 – 80
20 – 80
8 SOIC
TUBE
8 SOIC
TAPE/REEL
8 TSSOP
TUBE
8 TSSOP
TAPE/REEL
-25°C TO
85°C
-25°C TO
85°C
-25°C TO
85°C
-25°C TO
85°C
-1.25%
(Down)
-1.75%
(Down)
+/-0.625%
(Center)
+/-0.875%
(Center)
2,500
2,500
May, 2002
Revision B
PulseCore – A Division of Alliance Semiconductor
3160 De La Cruz Blvd., Suite 200 • Santa Clara • CA • 95054
Tel (408) 748-6988 • Fax (408) 748-0009
http://www.pulsecore.com
7 of 7
PRELIMINARY Specification
P2811/12/14
Alliance Semiconductor
Ordering
Number
Marking
Input
Output
Frequency
Package
Type
Qty. /
Reel
Temp.*
(NOTE)
Frequency Frequency Deviation
(MHz)
(MHz)
P2814-A-08ST
P2814-A-08SR
P2814-A-08TT
P2814-A-08TR
P2814-A
P2814-A
P2814-A
P2814-A
10 – 40
40 – 160
8 SOIC
TUBE
8 SOIC
TAPE/REEL
8 TSSOP
TUBE
8 TSSOP
TAPE/REEL
0°C TO
70°C
0°C TO
70°C
0°C TO
70°C
0°C TO
70°C
-2.50%
(Down)
-3.50%
(Down)
+/-1.25%
(Center)
+/-1.75%
(Center)
10 – 40
10 – 40
10 – 40
40 – 160
40 – 160
40 – 160
2,500
2,500
P2814-B-08ST
P2814-B-08SR
P2814-B-08TT
P2814-B-08TR
P2814-B
P2814-B
P2814-B
P2814-B
10 – 40
10 – 40
10 – 40
10 – 40
40 – 160
40 – 160
40 – 160
40 – 160
8 SOIC
TUBE
8 SOIC
TAPE/REEL
8 TSSOP
TUBE
8 TSSOP
TAPE/REEL
0°C TO
70°C
0°C TO
70°C
0°C TO
70°C
0°C TO
70°C
-1.25%
(Down)
-1.75%
(Down)
+/-0.625%
(Center)
+/-0.875%
(Center)
2,500
2,500
"Licensed under U.S. Patent Nos. 5,488,627 and 5,631,920"
May, 2002
Revision B
PulseCore – A Division of Alliance Semiconductor
3160 De La Cruz Blvd., Suite 200 • Santa Clara • CA • 95054
Tel (408) 748-6988 • Fax (408) 748-0009
http://www.pulsecore.com
8 of 8
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