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P1727 데이터시트 PDF




ON Semiconductor에서 제조한 전자 부품 P1727은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

PDF 형식의 P1727 자료 제공

부품번호 P1727 기능
기능 Notebook LCD Panel EMI Reduction IC
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P1727 데이터시트, 핀배열, 회로
P1727
Notebook LCD Panel EMI
Reduction IC
Features
FCC approved method of EMI attenuation
Generates a low EMI spread spectrum of the input
clock frequency
Optimized for frequency range: P1727X: 20MHz to
40MHz
Internal loop filter minimizes external components
and board space
8 different frequency deviations ranging from
±0.625% to –3.50%
Low inherent Cycle-to-cycle jitter
3.3V Operating Voltage
Supports notebook VGA and other LCD timing
controller applications
Available in 8-pin SOIC.
Product Description
The P1727 is a versatile spread spectrum frequency
modulator designed specifically for a wide range of
clock frequencies. The P1727 reduces electromagnetic
interference (EMI) at the clock source, allowing system
wide reduction of EMI of down stream (clock and data
dependent signals). The P1727 allows significant
system cost savings by reducing the number of circuit
board layers and shielding that are traditionally required
to pass EMI regulations.
The P1727 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 result 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 P1727 uses the most efficient and optimized
modulation profile approved by the FCC and is
implemented by using a proprietary all-digital method.
Applications
The P1727 is targeted towards notebook LCD displays,
other displays using an LVDS interface, PC peripheral
devices and embedded systems.
Block Diagram
PDB
VDD
CLKIN
Frequency
Divider
Feedback
Divider
www.DataSheet4U.com
Modulation
Phase
Detector
Loop
Filter
VSS
©2010 SCILLC. All rights reserved.
JANUARY 2010 – Rev. 1
PLL
VCO
Output
Divider
ModOUT
REFOUT
Publication Order Number:
P1727/D




P1727 pdf, 반도체, 판매, 대치품
DC Electrical Characteristics
Symbol
Parameter
VIL Input Low voltage
VIH Input High voltage
IIL Input Low current
IIH Input High current
VOL Output Low current
VDD = 3.3V, IOL = 20mA
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 Clock Output impedance
AC Electrical Characteristics
Symbol
Parameter
fIN Input Frequency:
P1727X
fOUT Output Frequency:
tLH1 Output Rise time
tHL1 Output Fall time
P1727X
Measured from 0.8V to 2.0V
Measured from 2.0V to 0.8V
tJC Jitter (Cycle-to-cycle)
tD Output Duty cycle
Note: 1. tLH and tHL are measured with a capacitive load of 15pF.
P1727
Min Typ Max Unit
VSS – 0.3
0.8 V
2.0 VDD +0.3 V
-35 µA
35 µA
0.4 V
2.5 V
2 mA
14 18 mA
3.0 3.3 3.6 V
0.18 mS
50
Min Typ Max
20 40
20 40
0.7 0.9 1.1
0.6 0.8 1.0
225 325
45 50 55
Unit
MHz
MHz
nS
nS
pS
%
www.DataSheet4U.com
Rev. 1 | Page 4 of 6 | www.onsemi.com

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