PL602-XX
HCSL Compatible Clock Generator for PCI Express
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • t el +1(408) 94 4 -0800 • fax +1(408) 474-1000 • www. micrel.com Rev 02/08/11 Page 1
FEATURES
Input Frequency:
o Fundamental Crystal or Reference Input: 25MHz
Output Frequency:
o PL602-21: 100MHz differential outputs.
o PL602-22: 125MHz differential outputs.
o PL602-23: 200MHz differential outputs.
o PL602-26: 25MHz differential outputs.
o PL602-27: 250MHz differential outputs.
o PL602-15: 156.25 MHz differential outputs.
Very low Jitter: 28ps Pk-Pk typ.
Very low Phase Noise:
o -130 dBc at 10kHz offset at 100MHz
No external loop filter is required
Power supply range: 2.25V to 3.63V
Operating temperature range from -40C to 85C
Available in 6-pin SOT or 8-pin SOP Green/RoHS
compliant package.
PIN CONFIGURATION
DESCRIPTION
The PL602-XX is the smallest, high performance, lowest power differential output clock IC available for HCSL
timing applications. PL602-XX offers -130dBc at 10kHz offset at 100MHz, with a very low jitter
(2 ps TIE RMS), making it ideal for HCSL applications requiring small size and low power.
BLOCK DIAGRAM
PIN DESCRIPTION
Name
Pin #
Type
Description
SOP
SOT23
XIN
1
-
I
Crystal input (SOP package only)
FIN
-
3
I
Reference clock input (SOT23 package only)
GND
2
2
P
GND connection
CLK[0:1]
3,4
1,6
O
Differential clock outputs [note:CLK0=~CLK1]
VDD
5
5
P
VDD connection
DNC
6
-
-
Do not connect
OE
7
4
I
Output enable (OE) input. Internal 60KΩ pull up resistor.
XOUT
8
-
O
Crystal output pin.
XIN, FIN
XOUT
OE
QB
Phase
Locked
Loop
Q
Xtal
Osc
PL602-XX
1
2
3
4 5
6
7
8XIN
CLK0
CLK1
XOUT
DNC
VDD
OEGND
SOP-8L
PL602-XX
HCSL Compatible Clock Generator for PCI Express
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • t el +1(408) 94 4 -0800 • fax +1(408) 474-1000 • www. micrel.com Rev 02/08/11 Page 2
ELECTRICAL SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
PARAMETERS
SYMBOL
MIN.
MAX.
UNITS
Supply Voltage Range
VDD
-0.5
4.6
V
Input Voltage Range
VI
-0.5
VDD+0.5
V
Output Voltage Range
VO
-0.5
VDD+0.5
V
Soldering Temperature
260
C
Storage Temperature
TS
-65
150
C
Ambient Operating Temperature*
-40
+85
C
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
CONDITIONS
MIN.
TYP.
MAX.
UNITS
Crystal Input Frequency
Fundamental Crystal
25
MHz
Input (FIN) Frequency
25
MHz
Input (FIN) Signal Amplitude
Internally AC coupled
0.9
VDD
Vpp
Output Frequency
25
200
MHz
Output Enable Time
OE Function; Ta=25º C, Add one clock
period to this measurement for a usable
clock output.
10
ns
Output Disable Time
OE Function; Ta=25º C
10
ns
Settling Time
At power-up (VDD > 2.25V)
10
ms
VDD Sensitivity
Frequency vs. VDD, ±10%
-2
2
ppm
Output Rise Time
10/90%VOH
0.3
0.5
ns
Output Fall Time
90/10%VOH
0.3
0.5
ns
Skew Between Outputs
Measured at 50% VOH
250
ps
Duty Cycle
At VDD/2
45
50
55
%
Period Jitter, peak-to-peak
- With capacitive decoupling between V DD
and GND
- At 100MHz
- 20,000 samples measured
28
ps
Cycle-to-Cycle, RMS
9
ps
Cycle-to-Cycle, peak
25
ps
TIE, RMS
2
ps
PL602-XX
HCSL Compatible Clock Generator for PCI Express
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • t el +1(408) 94 4 -0800 • fax +1(408) 474-1000 • www. micrel.com Rev 02/08/11 Page 3
DC SPECIFICATIONS
PARAMETERS
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNITS
Supply Current, Dynamic
IDD
At 100MHz, No Load
25
mA
Operating Voltage
VDD
2.25
3.63
V
Output Low Voltage
VOL
HCSL termination,
(RS = 150Ω, RT = 49.9Ω) 3.3V
(RS = 100Ω, RT = 49.9Ω) 2.5V
0.05
V
Output High Voltage
VOH
0.65
0.75
0.85
V
Output Current
IOSD
13
15
17
mA
CRYSTAL SPECIFICATIONS
PARAMETERS
SYMBOL
MIN.
TYP.
MAX.
UNITS
Fundamental Crystal Resonator Frequency
FXIN
25
MHz
Crystal Loading Rating
CL ( x ta l)
18
pF
Maximum Sustainable Drive Level
500
W
Operating Drive Level
100
W
Crystal Shunt Capacitance
C0
6
pF
Effective Series Resistance, Fundamental
ESR
45
Ω
PL602-XX
HCSL Compatible Clock Generator for PCI Express
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • t el +1(408) 94 4 -0800 • fax +1(408) 474-1000 • www. micrel.com Rev 02/08/11 Page 4
PCI EXPRESS/HCSL COM PAT IBLE LAY OUT GUIDELINES
Figure 1 below describes how to terminate the complementary LVCMOS outputs of PL602-XX for use with HCSL
inputs.
50 Ohm line
50 Ohm line
Rs
Rs
Rt
Rt
LVCMOS Output
Complementary
LVCMOS Output
0V
3.3V
0V
0.75V
Complementary
Input
Input
Component Selection
For 3.3V Operation
Rs = 150 Ohm
Rt = 50 Ohm
Notes:
Place Rs as close to the LVCMOS outputs as possible.
Place Rt as close to the HCSL inputs as possible.
HCSL
Figure 1
For 2.5V Operation
Rs = 100 Ohm
Rt = 50 Ohm
PCB LAYOUT CONSIDERATIONS FOR PERFORMANCE OPTIMIZATION
The following guidelines are to assist you with a performance optimized PCB design:
- Keep all the PCB traces to PL602-XX as short as
possible, as well as keeping all other traces as far away
from it as possible.
- Place the crystal as close as possible to both crystal
pins of the device. This will reduce the cross-talk
between the crystal and the other signals.
- Separate crystal pin traces from the other signals on the
PCB, but allow ample distance between the two crystal
pin traces.
- Place a 0.01µF~0.1µF decoupling capacitor between
VDD and GND, on the component side of the PCB,
close to the VDD pin. It is not recommended to place
this component on the backside of the PCB.
- It is highly recommended to keep the VDD and GND
traces as short as possible.
- When connecting long traces (> 1 inch) to a CMOS
output, it is important to design the traces as a
transmission line or ‘stripline’, to avoid reflections or
ringing. In this case, the CMOS output needs to be
matched to the trace impedance. Usually ‘striplines’ are
designed for 50Ω impedance and CMOS outputs
usually have lower than 50Ω impedance so matching
can be achieved by adding a resistor in series with the
CMOS output pin to the ‘stripline’ trace.
PL602-XX
HCSL Compatible Clock Generator for PCI Express
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • t el +1(408) 94 4 -0800 • fax +1(408) 474-1000 • www. micrel.com Rev 02/08/11 Page 5
PACKAGE DRAWINGS (GREEN PACKAGE COMPLIANT)
SOP-8L
SOT23-6L
Symbol
Dimension in MM
Min.
Max.
A
1.35
1.75
A1
0.10
0.25
A2
1.25
1.50
B
0.33
0.53
C
0.19
0.27
D
4.80
5.00
E
3.80
4.00
H
5.80
6.20
L
0.40
0.89
e
1.27 BSC
Symbol
Dimension in MM
Min.
Max.
A
1.05
1.35
A1
0.05
0.15
A2
1.00
1.20
B
0.30
0.50
C
0.08
0.20
D
2.80
3.00
E
1.50
1.70
H
2.60
3.0
L
0.35
0.55
e
0.95 BSC
C
L
A2
EH
D
A1
eb
A
C
L
A2
EH
D
A1
eb
A
PL602-XX
HCSL Compatible Clock Generator for PCI Express
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • t el +1(408) 94 4 -0800 • fax +1(408) 474-1000 • www. micrel.com Rev 02/08/11 Page 6
ORDERING INFORMATION (GREEN PACKAGE COMPLIANT)
Micrel Inc., reserves the right to make changes in its products or specifications, or both at any time without notice. The information furnished by Micrel is believed to be accurate
and reliable. However, Micrel makes no guarantee or warranty concerning the accuracy of said information and shall not be responsible for any loss or damage of whatever
nature resulting from the use of, or reliance upon this product.
LIFE SUPPORT POLICY: Micrel’s products are not authoriz ed for use as critical components in life support devices or systems without the express
written approval of the President of Micr el Inc.
For part ordering, please contact our Sales Department:
2180 Fortune Drive, San Jose, CA 95131, USA
Tel: (408) 944-0800 Fax: (408) 474-1000
PART NUMBER
The order number for this device is a combination of the following:
Part number, Package type and Operating temperature range
PL602-XX X X - X
Part Number
Package Type
S=SOP-8L
T=SOT23-6L
Shipping Option
None=Tube
R=Tape & Reel
Temperature
C=Commercial (0°C to 70°C)
I=Industrial (-40°C to 85°C)
Frequency
Designator
21 = 100MHz
22 = 125MHz
23 = 200MHz
25 = 156.25MHz
26 = 25MHz
27 = 250MHz
15 = 156.25
Part / Order Number
Marking
Package Option
PL602-2XSC
P602-2X
SC
LLLLL
8-Pin SOP (Tube)
PL602-2XSC-R
8-Pin SOP (Tape and Reel)
PL602-1XTC-R
F1X
LLL
6-Pin SOT-23 (Tape and Reel)
PL602-2XTC-R
F2X
LLL
6-Pin SOT-23 (Tape and Reel)
Note: LLL / LLLLL designate Production Lot.