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PL671-00 Datasheet دیتاشیت PDF دانلود

دیتاشیت - PLL - Programmable Spread Spectrum Clock

شماره قطعه PL671-00
شرح مفصل Programmable Spread Spectrum Clock
تولید کننده PLL 
آرم PLL 


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PL671-00 شرح
PicoEMITM Programmable Spread Spectrum Clock
FEATURES
Advanced programmable Spread Spectrum clock
generator with 16 modulation steps to choose from
Programmable SST Modulation Magnitude:
o Center Spread: ±0.125% to ±2.0% in ±0.125% steps
o Down Spread: -0.25% to -4.0% in 0.25% steps
Input Frequency Range:
o Fundamental Crystal: 10MHz to 40MHz
Output Frequency Range:
o 1MHz to 200MHz @ 3.3V operation
o 1MHz to 166MHz @ 2.5V operation
Programmable Output Drive (4mA, 8mA, 16mA)
Low Cycle to Cycle jitter, 100pS
Single 2.5V to 3.3V, ± 10% power supply
Available in Die form
DESCRIPTION
The PL671-00 is an advanced programmable Spread
Spectrum clock generator (PSSCG), and a member of
PhaseLink’s PicoPLL Programmable Clock family.
The PL671-00 clock outputs can be programmed up to
200MHz (3.3V) or 166MHz (2.5V), and has 16 modulation
magnitudes (±0.125 to ±2.0% or -0.25 to -4.0%) to choose
from for use in Center or Down Spread modulation
applications. In addition, 2 configuration pins can be
programmed to allow cycling the device through 4 pre-
programmed states*. The option of being able to turn
‘ON/OFF’ the Spread Spectrum modulation allows for
completing a design with PL671-00 and having the assurance
of turning ‘ON’ the EMI modulation if EMI becomes an issue*.
The PL671-00’s spread spectrum modulation greatly
reduces the fundamental and harmonic frequencies’
peak magnitude, reducing the system level
electromagnetic radiation by as much as 20dB.
*Note: Requires 6-pad package
PAD CONFIGURATION
0.80mm
XIN XOUT
OE^, PDB^,
CLK1
CSEL1^
VDD
CSEL0^, CLK2
GND
CLK0
Note: ^ denotes internal pull up resistor
BLOCK DIAGRAM
DIE SPECIFICATION
Parameter
Chip size
Chip thickness
PAD size
Chip base
XIN
XOUT
Xtal
FREF
Osc
Modulation Magnitude*
PDB
CLK[0:2]
CSEL[0:1]
SST On/Off
* Optional Pre-defined
Modulation Magnitude Control
R-Counter
9-bits
M-Counter
11-bits
P-Counter
6-bits
Odd/Even
/1, /2
÷8 Phase
Detector
÷8
Charge
Pump
FVCO = FREF * (M/R)
FOUT = FVCO / P
Loop
Filter
Value
1.40mm x 0.80mm
150 to 250µm
90µm x 90 µm
GND level
SST
Modulation
VCO
CLK1/PDB
CLK0
Programmable Function
/1, /2, /4
CLK2/CSEL0
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991 www.phaselink.com Rev 12/22/08 Page 1

قانون اساسیصفحه 6
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