Disabled outputs programmable as HiZ or Active Low.
•
Low current consumption:
o
<1.2mA @ 27MHz
o
< 5 A when PDB is activated
•
Single 1.8V, 2.5V, or 3.3V ± 10% power supply
•
Operating temperature range from -40°C to 85°C
DESCRIPTION
The PL611s-28 consumes very low-power while
producing high performance clock outputs of up to
55MHz. Designed for low-power applications with
very stringent space requirement, PL611s-28
consumes about 1.2mA, while producing 2 distinct
outputs of 27MHz and 13.5MHz. Designed to fit in a
small SOT, SC70, or SOT23 package for high
performance applications, the PL611s-28 offers
excellent phase noise and jitter performance. The
power down feature of PL611s-28, when activated,
allows the IC to consume less than 5 A of power,
while its programming flexibility allows generating
any output, using a low-cost crystal or reference
input. In addition, one programmable I/O pin can be
configured as Output Enable (OE), Frequency
switching (FSEL), Power Down (PDB) input, or CLK1
(F
OUT
, F
REF
, F
REF
/2) output.
PACKAGE PIN CONFIGURATION
GND
XIN/FIN
OE, PDB, FSEL, CLK1
GND
1
2
3
6
5
4
CLK0
VDD
XOUT
OE, PDB,
FSEL, CLK1
GND
XIN/FIN
1
2
3
6
5
4
CLK0
VDD
XOUT
PL611s-28
PL611s-28
PL611s-28
PL611s-28
PL611s-28
1
2
3
6
5
4
XOUT
VDD
CLK0
OE, PDB,
FSEL, CLK1
XIN/FIN
DFN-
DFN-6L
(2.0mmx1.3mmx0.6mm)
mmx1 mmx0 mm)
BLOCK DIAGRAM
XIN/FIN
XOUT
XTAL
F
ref
R-counter
(8-Bit)
OSC
M-counter
(11-Bit)
Programmable
CLoad
Programmable Function
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 3/9/07 Page 1
PL611s-28
SC70-
SC70-6L
70
mmx2 25mmx mm)
mmx1
(2.3mmx2.25mmx1.0mm)
SOT23-
SOT23-6L
23
mmx3 mmx1 35mm
mm)
(3.0mmx3.0mmx1.35mm)
Phase
Detector
Charge
Pump
Loop
Filter
Fvco= Fref * (2 * M / R)
VCO
Fout= Fvco / (2 * P)
P-counter
(5-Bit)
CLK0
Programming
Logic
OE, FSEL,
PDB, CLK1
(Preliminary)
PL611s-28
1.8V-3.3V PicoPLL
TM
, World’s Smallest Programmable Clock
KEY PROGRAMMING PARAMETERS
CLK[0:1]
Output Frequency
F
OUT
= F
REF
* M / (R * P)
Where M = 11 bit
R = 8 bit
P = 5 bit
CLK0 = F
OUT
, F
REF
or F
REF
/ (2*P)
CLK1 = F
REF
, F
REF
/2, CLK0 or CLK0/2
Output Drive Strength
Three optional drive strengths to
choose from:
•
Low: 4mA
•
Std: 8mA (default)
•
High: 16mA
Programmable
Input/Output
One output pin can be configured
as:
•
•
•
•
OE - input
PDB - input
FSEL – input
HiZ or Active Low disabled state
PACKAGE PIN ASSIGNMENT
Name
Pin Assignment
SOT SC70 DFN
Pin # Pin# Pin#
Type
Description
This programmable I/O pin can be configured as an Output Enable
(OE) input, Power Down (PDB) input, On-the-Fly Frequency Switching
Selector (FSEL)input or CLK1 clock output. This pin has an internal
60K pull up resistor (OE, PDB & FSEL Only).
OE, PDB,
FSEL, CLK1
1
2
2
I/O
The OE and PDB features can be programmed to allow the output to
float (Hi Z), or to operate in the ‘Active low’ mode.
State
0
1 (default)
GND
XIN, FIN
XOUT
VDD
CLK0
2
3
4
5
6
1
3
4
5
6
3
1
6
5
4
P
I
O
P
O
GND connection
Crystal or Reference input pin
Crystal Output pin
Do Not Connect (DNC ) when FIN is present
VDD connection
Programmable Clock Output
OE
Disable CLK
Normal mode
PDB
Power Down Mode
Normal mode
FSEL
Frequency ‘2’
Frequency ‘1’
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 3/9/07 Page 2
(Preliminary)
PL611s-28
1.8V-3.3V PicoPLL
TM
, World’s Smallest Programmable Clock
FUNCTIONAL DESCRIPTION
PL611s-28 is a highly featured, very flexible, advanced programmable PLL design for high performance, low-
power, small form-factor applications. The PL611s-28 accepts a fundamental input crystal of 10MHz to 50MHz or
reference clock input of 1MHz to 200MHz and is capable of producing two outputs up to 125MHz. This flexible
design allows the PL611s-28 to deliver any PLL generated frequency, F
REF
(Crystal or Ref Clk) frequency or F
REF
/(2*P) to CLK0 and/or CLK1. Some of the design features of the PL611s-28 are mentioned below:
PLL Programming
The PLL in the PL611s-28 is fully programmable.
The PLL is equipped with an 8-bit input frequency
divider (R-Counter), and an 11-bit VCO frequency
feedback loop divider (M-Counter). The output of
the PLL is transferred to a 5-bit post VCO divider (P-
Counter). The output frequency is determined by
the following formula [F
OUT
= F
REF
* M / (R * P) ].
Clock Output (CLK0)
CLK0 is the main clock output. The output of CLK0
can be configured as the PLL output (F
VCO
/(2*P)),
F
REF
(Crystal or Ref Clk Frequency) output, or
F
REF
/(2*P) output.
Clock Output (CLK1)
The CLK1 feature allows the PL611s-28 to have an
additional clock output. This output can be
programmed to one of the following:
F
REF
- Reference (Crystal or Ref Clk) Frequency
F
REF
/ 2
CLK0
CLK0 / 2
The output drive level can be programmed to Low
Drive (4mA), Standard Drive (8mA) or High Drive
(16mA) for each clock independently. The maximum
output frequency is 125MHz.
Output Enable (OE)
The Output Enable feature allows the user to enable
and disable the clock output(s) by toggling the OE
pin. The OE pin incorporates a 60k pull up
resistor giving a default condition of logic “1”.
The OE feature can be programmed to allow the
output to float (Hi Z), or to operate in the ‘Active low’
mode.
Power-Down Control (PDB)
The Power Down (PDB) feature allows the user to
put the PL611s-28 into “Sleep Mode”. When
activated (logic ‘0’), PDB ‘Disables the PLL, the
oscillator circuitry, counters, and all other active
circuitry. In Power Down mode the IC consumes
<10 A of power. The PDB pin incorporates a 60k
pull up resistor giving a default condition of logic “1”.
The PDB feature can be programmed to allow the
output to float (Hi Z), or to operate in the ‘Active low’
mode.
Frequency Select (FSEL)
The Frequency Select (FSEL) feature allows the
PL611s-28 to switch between two pre-programmed
outputs allowing the device “On the Fly” frequency
switching. The FSEL pin incorporates a 60k pull
up resistor giving a default condition of logic “1”.
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 3/9/07 Page 3
(Preliminary)
PL611s-28
1.8V-3.3V PicoPLL
TM
, World’s Smallest Programmable Clock
ELECTRICAL SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
PARAMETERS
Supply Voltage Range
Input Voltage Range
Output Voltage Range
Soldering Temperature (Green package)
Data Retention @ 85°C
Storage Temperature
Ambient Operating Temperature*
T
S
10
-65
-40
150
85
SYMBOL
V
DD
V
I
V
O
MIN.
MAX.
7
V
DD
+
0.5
V
DD
+
0.5
260
UNITS
V
V
V
°C
Year
°C
°C
-
0.5
-
0.5
-
0.5
Exposure of the device under conditions beyond the limits specified by Maximum Ratings for extended periods may cause permanent damage to the device
and affect product reliability. These conditions represent a stress rating only, and functional operations of the device at these or any other conditions above
the operational limits noted in this specification is not implied. *Operating temperature is guaranteed by design. Parts are tested to commercial grade only.
AC SPECIFICATIONS
PARAMETERS
Crystal Input Frequency (XIN)
CONDITIONS
Fundamental Crystal
@ V
DD
=3.3V
MIN.
10
TYP.
MAX.
50
200
166
133
UNITS
MHz
Input (FIN) Frequency
@ V
DD
=2.5V
@ V
DD
=1.8V
MHz
Input (FIN) Signal Amplitude
Input (FIN) Signal Amplitude
Internally AC coupled (High Frequency)
Internally AC coupled (Low Frequency)
3.3V <50MHz, 2.5V <40MHz, 1.8V <15MHz
@ V
DD
=3.3V
@ V
DD
=2.5V
@ V
DD
=1.8V
0.9
0.1
V
DD
V
DD
125
90
65
2
10
2
Vpp
V
pp
MHz
MHz
MHz
ms
ns
ms
ppm
ns
ns
%
ps
Output Frequency
Settling Time
Output Enable Time
VDD Sensitivity
Output Rise Time
Output Fall Time
Duty Cycle
At power-up (after V
DD
increases over 1.62V)
OE Function; Ta=25º C, 15pF Load
PDB Function; Ta=25º C, 15pF Load
Frequency vs. V
DD
+/-10%
15pF Load, 10/90% V
DD
, High Drive, 3.3V
15pF Load, 90/10% V
DD
, High Drive, 3.3V
V
DD
/2
45
-2
1.2
1.2
50
70
2
1.7
1.7
55
Period Jitter,Pk-to-Pk*
With capacitive decoupling between V
DD
and
(measured from 10,000 samples) GND.
* Note: Jitter performance depends on the programming parameters.
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 3/9/07 Page 4
(Preliminary)
PL611s-28
1.8V-3.3V PicoPLL
TM
, World’s Smallest Programmable Clock
DC SPECIFICATIONS
PARAMETERS
Supply Current, Dynamic, with
Loaded CMOS Outputs
Supply Current, Dynamic, with
Loaded CMOS Outputs
Supply Current, Dynamic with
Loaded CMOS Outputs
PLL Off: Supply Current, Dynamic,
with Loaded CMOS Output
PLL Off: Supply Current, Dynamic,
with Loaded CMOS Output
PLL Off: Supply Current, Dynamic
with Loaded CMOS Output
Supply Current, Dynamic, with
Loaded Outputs
Operating Voltage
Output Low Voltage
Output High Voltage
Output Current, Low Drive
Output Current, Standard Drive
Output Current, High Drive
SYMBOL
I
DD
I
DD
I
DD
I
DD
I
DD
I
DD
I
DD
V
DD
V
OL
V
OH
I
OSD
I
OSD
I
OHD
CONDITIONS
@ V
DD
=3.3V,
load=15pF
@ V
DD
=2.5V,
load=10pF
@ V
DD
=1.8V,
load=5pF
@ V
DD
=3.3V,
load=15pF
@ V
DD
=2.5V,
load=10pF
@ V
DD
=1.8V,
load=5pF
When PDB=0
27MHz,
27MHz,
27MHz,
27MHz,
27MHz,
27MHz,
MIN.
TYP.
4.0
2.7
1.2
2.0
1.3
0.8
MAX.
UNITS
mA
mA
mA
mA
mA
mA
5
1.62
3.63
0.4
V
DD
– 0.4
4
8
16
A
V
V
V
mA
mA
mA
I
OL
= +4mA Standard Drive
I
OH
= -4mA Standard Drive
V
OL
= 0.4V, V
OH
= 2.4V
V
OL
= 0.4V, V
OH
= 2.4V
V
OL
= 0.4V, V
OH
= 2.4V
* Note: Please contact PhaseLink, if super-low-power is required.
CRYSTAL SPECIFICATIONS
PARAMETERS
Fundamental Crystal Resonator Frequency
Crystal Loading Rating
(The IC can be programmed for any value in this range.)
Maximum Sustainable Drive Level
Operating Drive Level
Metal Can Crystal
Shunt Capacitance
ESR Max
Small SMD Crystal
Shunt Capacitance
ESR Max
C0
ESR
C0
ESR
30
5.5
50
2.5
80
pF
SYMBOL
F
XIN
C
L (xtal)
MIN.
10
8
TYP.
MAX.
50
12
100
UNITS
MHz
pF
µW
µW
pF
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
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