PULSECORE P1727CG-08TT

P1727
April 2007
rev 0.2
Low Power Notebook LCD Panel EMI Reduction IC
Features
• FCC approved method of EMI attenuation
significant system cost savings by reducing the number
• Generates a low EMI spread spectrum of
of circuit board layers and shielding that are traditionally
the input clock frequency
required to pass EMI regulations.
• Optimized for frequency range:
P1727X: 20MHz to 40MHz
The P1727 modulates the output of a single PLL in
• Internal loop filter minimizes external
order to “spread” the bandwidth of a synthesized clock,
components and board space
thereby
• 8 different frequency deviations ranging
decreasing
the
peak
amplitudes
of
its
harmonics. This result in significantly lower system EMI
from +/-0.625% to –3.50%
compared to the typical narrow band signal produced
• Low inherent Cycle-to-cycle jitter
by oscillators and most clock generators. Lowering EMI
• 3.3V Operating Voltage
by increasing a signal’s bandwidth is called “spread
• Supports notebook VGA and other LCD
spectrum clock generation”.
timing controller applications
The P1727 uses the most efficient and optimized
• Available in 8 pin SOIC and TSSOP
modulation profile approved by the FCC and is
• Qualified for Industrial Temp Spec.
implemented by using a proprietary all-digital method.
(-40°C to +85°C)
Applications
Product Description
The P1727 is a versatile spread spectrum
The P1727 is targeted towards notebook LCD displays,
frequency modulator designed specifically for a wide
other displays using an LVDS interface, PC peripheral
range of clock frequencies. The P1727 reduces
devices and embedded systems.
electromagnetic interference (EMI) at the clock source,
allowing system wide reduction of EMI of down stream
(clock and data dependent signals). The P1727 allows
Block Diagram
PDB
VDD
PLL
Modulation
CLKIN
Frequency
Divider
Feedback
Divider
Phase
Detector
Loop
Filter
VCO
Output
Divider
ModOUT
REFOUT
VSS
PulseCore Semiconductor
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.
P1727
April 2007
rev 0.2
Pin Configuration
CLKIN
1
VDD
2
VSS
8
PDB
7
NC
3
6
NC
ModOUT 4
5
REFOUT
P1727
Table 1 – Power Down Selection
PDB
Spread Spectrum
ModOUT
PLL
Mode
0
N/A
Disabled
Disabled
Power Down
1
ON
Normal
Normal
Normal
Table 2 Frequency Deviation Selection
P/ N
Deviation
P/N
Deviation
P1727A
-1.25%
P1727E
+/-0.625%
P1727B
-1.75%
P1727F
+/-0.875%
P1727C
-2.50%
P1727G
+/-1.25%
P1727D
-3.50%
P1727H
+/-1.75%
Pin Description
Pin#
Pin Name
Type
Description
1
CLKIN
I
External reference frequency input. Connect to externally generated
reference signal.
2
VDD
P
Connect to +3.3V
3
VSS
P
Ground Connection. Connect to system ground.
4
ModOUT
O
Spread Spectrum Clock output
5
REFOUT
O
Reference output.
6
NC
No connect
7
NC
No connect
8
PDB
I
Powerdown Pin.Pull low to disable spread spectrum clock output.
Low Power Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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P1727
April 2007
rev 0.2
Schematic for notebook VGA application
27MHz Pixel Clock input
VDD
CLKIN
2
VDD
3
VSS
4
ModOUT
0.1 µF
ModOut Clock
PDB 8
1
P1727
Tie low to enable
Powerdown mode.
NC 7
NC 6
REFOUT 5
Reference Clock O/P
Absolute Maximum Ratings
Symbol
Parameter
VDD, VIN
Voltage on any pin with respect to Ground
TSTG
Storage temperature
Rating
Unit
-0.5 to +7
V
-65 to +125
°C
Ts
Max. Soldering Temperature (10 sec)
260
°C
TJ
Junction Temperature
150
°C
2
KV
TDV
Static Discharge Voltage
(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.
Low Power Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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P1727
April 2007
rev 0.2
DC Electrical Characteristics
Symbol
Parameter
Min
Typ
Max
Unit
VIL
Input Low voltage
VSS – 0.3
0.8
V
VIH
Input High voltage
2.0
VDD +0.3
V
IIL
Input Low current
-35
µA
IIH
Input High current
35
µA
VOL
Output Low current
VDD = 3.3V, IOL = 20mA
0.4
V
VOH
Output High current
VDD = 3.3V, IOH = 20mA
IDD
Static Supply Current (CLKIN, PDB pulled Low)
ICC
Dynamic Supply Current (No Load)
VDD
Operating Voltage
tON
Power up time (first locked clock cycle after power up)
ZOUT
TA
2.5
V
3.0
Clock Output impedance
Operating temperature
2
mA
14
18
mA
3.3
3.6
V
0.18
mS
50
Ω
0
70
°C
AC Electrical Characteristics
Symbol
Parameter
Min
Typ
Unit
40
MHz
fIN
Input Frequency:
P1727X
fOUT
Output Frequency
P1727X
20
40
MHz
tLH1
Output Rise time
Measured from 0.8V to 2.0V
0.7
0.9
1.1
nS
Output Fall time
Measured from 2.0V to 0.8V
0.6
0.8
1.0
nS
225
325
pS
50
55
%
tHL
1
tJC
Jitter (Cycle to cycle)
tD
Output Duty cycle
20
Max
45
Note: 1. tLH and tHL are measured with a capacitive load of 15pF
Low Power Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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P1727
April 2007
rev 0.2
Package Information
8-lead (150-mil) SOIC Package
H
E
D
A2
A
C
A1
D
θ
e
L
B
Dimensions
Symbol
Inches
Min
Max
Millimeters
Min
Max
A1
0.004
0.010
0.10
0.25
A
0.053
0.069
1.35
1.75
A2
0.049
0.059
1.25
1.50
B
0.012
0.020
0.31
0.51
C
0.007
0.010
0.18
0.25
D
0.193 BSC
4.90 BSC
E
0.154 BSC
3.91 BSC
e
0.050 BSC
1.27 BSC
H
0.236 BSC
6.00 BSC
L
0.016
0.050
0.41
1.27
θ
0°
8°
0°
8°
Low Power Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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P1727
April 2007
rev 0.2
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
Min
Millimeters
Max
A
Min
Max
0.043
1.10
A1
0.002
0.006
0.05
0.15
A2
0.033
0.037
0.85
0.95
B
0.008
0.012
0.19
0.30
c
0.004
0.008
0.09
0.20
D
0.114
0.122
2.90
3.10
E
0.169
0.177
4.30
4.50
e
0.026 BSC
0.65 BSC
H
0.252 BSC
6.40 BSC
L
0.020
0.028
0.50
0.70
θ
0°
8°
0°
8°
Low Power Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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P1727
April 2007
rev 0.2
Ordering Information
Part number
Marking
Package Configuration
Temperature Range
P1727AG-08ST
P1727AG
8 PIN SOIC, TUBE, Green
Commercial
P1727AG-08SR
P1727AG
8 PIN SOIC, TAPE & REEL, Green
Commercial
P1727AG-08TT
P1727AG
8 PIN TSSOP, TUBE, Green
Commercial
P1727AG-08TR
P1727AG
8 PIN TSSOP, TAPE & REEL, Green
Commercial
P1727BG-08ST
P1727BG
8 PIN SOIC, TUBE, Green
Commercial
P1727BG-08SR
P1727BG
8 PIN SOIC, TAPE & REEL, Green
Commercial
P1727BG-08TT
P1727BG
8 PIN TSSOP, TUBE, Green
Commercial
P1727BG-08TR
P1727BG
8 PIN TSSOP, TAPE & REEL, Green
Commercial
P1727CG-08ST
P1727CG
8 PIN SOIC, TUBE, Green
Commercial
P1727CG-08SR
P1727CG
8 PIN SOIC, TAPE & REEL, Green
Commercial
P1727CG-08TT
P1727CG
8 PIN TSSOP, TUBE, Green
Commercial
P1727CG-08TR
P1727CG
8 PIN TSSOP, TAPE & REEL, Green
Commercial
P1727DG-08ST
P1727DG
8 PIN SOIC, TUBE, Green
Commercial
P1727DG-08SR
P1727DG
8 PIN SOIC, TAPE & REEL, Green
Commercial
P1727DG-08TT
P1727DG
8 PIN TSSOP, TUBE, Green
Commercial
P1727DG-08TR
P1727DG
8 PIN TSSOP, TAPE & REEL, Green
Commercial
P1727EG-08ST
P1727EG
8 PIN SOIC, TUBE, Green
Commercial
P1727EG-08SR
P1727EG
8 PIN SOIC, TAPE & REEL, Green
Commercial
P1727EG-08TT
P1727EG
8 PIN TSSOP, TUBE, Green
Commercial
P1727EG-08TR
P1727EG
8 PIN TSSOP, TAPE & REEL, Green
Commercial
P1727FG-08ST
P1727FG
8 PIN SOIC, TUBE, Green
Commercial
P1727FG-08SR
P1727FG
8 PIN SOIC, TAPE & REEL, Green
Commercial
P1727FG-08TT
P1727FG
8 PIN TSSOP, TUBE, Green
Commercial
P1727FG-08TR
P1727FG
8 PIN TSSOP, TAPE & REEL, Green
Commercial
P1727GG-08ST
P1727GG
8 PIN SOIC, TUBE, Green
Commercial
P1727GG-08SR
P1727GG
8 PIN SOIC, TAPE & REEL, Green
Commercial
P1727GG-08TT
P1727GG
8 PIN TSSOP, TUBE, Green
Commercial
P1727GG-08TR
P1727GG
8 PIN TSSOP, TAPE & REEL, Green
Commercial
P1727HG-08ST
P1727HG
8 PIN SOIC, TUBE, Green
Commercial
P1727HG-08SR
P1727HG
8 PIN SOIC, TAPE & REEL, Green
Commercial
P1727HG-08TT
P1727HG
8 PIN TSSOP, TUBE, Green
Commercial
P1727HG-08TR
P1727HG
8 PIN TSSOP, TAPE & REEL, Green
Commercial
Low Power Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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P1727
April 2007
rev 0.2
Device Ordering Information
P 1 7 2 7 X
G
0 8 - X X
SR - SOIC, T/R
TT – TSSOP, TUBE
TR - TSSOP, T/R
ST – SOIC, TUBE
Pin Count
F = LEAD FREE AND RoHS COMPLIANT PART
G = GREEN PACKAGE, LEAD FREE, and RoHS
Deviation (%) and Spread option Identifier
DEVICE NUMBER
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.
Low Power Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
8 of 9
P1727
April 2007
rev 0.2
PulseCore Semiconductor Corporation
1715 S. Bascom Ave Suite 200
Campbell, CA 95008
Tel: 408-879-9077
Fax: 408-879-9018
www.pulsecoresemi.com
Copyright © PulseCore Semiconductor
All Rights Reserved
Part Number: P1727
Document Version: 0.2
Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003
© 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.
Low Power Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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