PL60208X
PCIe Octal, Ultra-Low Jitter,
HCSL Frequency Synthesizer
General Description
The PL602081 and PL602082 are members of the PCI
Express family of devices from Micrel and provide an
extremely low-noise timing solution for PCI Express clock
signals. They are based upon a unique synthesizer
architecture that provides very low phase noise.
The devices operate from a 3.3V or 2.5V power supply
and synthesize eight HCSL output clocks. The PL602081
synthesizes 25MHz, 100MHz, or 200MHz and the
PL602082 synthesizes 25MHz, 125MHz, or 250MHz. The
PL60208x devices accept a 25MHz crystal or LVCMOS
reference clock.
Datasheets and support documentation are available on
Micrel’s web site at:
www.micrel.com.
Features
Generates eight HCSL clock outputs.
PL602081 output frequencies: 25MHz, 100MHz, or
200MHz.
PL602082 output frequencies: 25MHz, 125MHz, or
250MHz.
2.5V or 3.3V operating range.
Typical phase jitter: 250fs for 12KHz to 20MHz.
Compliant with PCI Express Gen1, Gen2, and Gen3.
Industrial temperature range (–40C to +85C).
RoHS and PFOS compliant.
Available in 44-pin 7mm
7mm QFN package.
Block Diagram
Applications
Servers
Storage systems
Switches and routers
Gigabit Ethernet
Set-top boxes/DVRs
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 •
http://www.micrel.com
December 11, 2013
Revision 1.1
hbwhelp@micrel.com
or (408) 955-1690
Micrel, Inc.
PL60208X
Ordering Information
(1)
Part Number
PL602081UMG
PL602081UMG TR
PL602082UMG
PL602082UMG TR
Note:
1. Devices are RoHS and PFOS compliant.
Marking
PL602081UMG
PL602081UMG
PL602082UMG
PL602082UMG
Shipping
Tray
Tape and Reel
Tray
Tape and Reel
Junction Temperature Range
–40° to +85°C
–40° to +85°C
–40° to +85°C
–40° to +85°C
Package
44-Pin QFN
44-Pin QFN
44-Pin QFN
44-Pin QFN
December 11, 2013
2
Revision 1.1
hbwhelp@micrel.com
or (408) 955-1690
Micrel, Inc.
PL60208X
Pin Configuration
44-Pin QFN
(Top View)
Pin Description
Pin Number
1, 2
4, 5
7, 8
25, 26
28, 29
32, 33
35, 36
41, 42
14
12, 13
31, 37, 38
16, 43, 44
21, 23
24, 39
3, 6, 40
Pin Name
/Q5, Q5
/Q6, Q6
/Q7, Q7
/Q0, Q0
/Q1, Q1
/Q2, Q2
/Q3, Q3
/Q4, Q4
FSEL
VDD
VDDO1
VDDO2
VSS
(exposed
pad)
VSSO1
VSSO2
I, (SE)
PWR
PWR
PWR
PWR
PWR
PWR
LVCMOS
Frequency select, 1 = 100MHz, 0 = 200MHz, 45KΩ pull-up.
Power supply.
Power supply for outputs Q0 – Q3.
Power supply for outputs Q4 – Q7.
Core power supply ground. The exposed pad must be
connected to the VSS ground plane.
Power supply ground for outputs Q0 – Q3.
Power supply ground for outputs Q4 – Q7.
O, (DIF)
HCSL
Differential clock output.
Pin Type
Pin Level
Pin Name
December 11, 2013
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Revision 1.1
hbwhelp@micrel.com
or (408) 955-1690
Micrel, Inc.
PL60208X
Pin Description (Continued)
Pin Number
Pin Name
Pin Type
Pin Level
Pin Name
PLL bypass, selects output source.
0 = normal PLL operation
1 = output from input reference clock or crystal
45KΩ pull down
Selects PLL input reference source
0 = REF_IN, 1 = XTAL, 45KΩ pull-up
Factory test pins. Do not connect anything to these pins.
I, (SE)
I, (SE)
O, (SE)
I, (SE)
I, (SE)
LVCMOS
10pF crystal
10pF crystal
LVCMOS
LVCMOS
Reference clock input
Crystal reference input, no load caps needed (see
Figure 6)
Crystal reference output, no load caps needed (see
Figure
6)
Output enable, outputs Q0 – Q3 disable to tri-state,
0 = disabled, 1 = enabled, 45KΩ pull-up
Output enable, outputs Q4 – Q7 disable to tri-state,
0 = disabled, 1 = enabled, 45KΩ pull-up
9
PLL_BYPASS
I, (SE)
LVCMOS
10
11, 20, 27,
30, 34
17
18
19
15
22
XTAL_SEL
TEST
REF_IN
XTAL_IN
XTAL_OUT
OE1
OE2
I, (SE)
LVCMOS
December 11, 2013
4
Revision 1.1
hbwhelp@micrel.com
or (408) 955-1690
Micrel, Inc.
PL60208X
Absolute Maximum Ratings
(2)
Supply Voltage (V
DD
, V
DDO1/2
) ...................................... +4.6V
Input Voltage (V
IN
) ...............................
0.50V
to V
DD
+0.5V
Lead Temperature (soldering, 20s) ............................ 260°C
Case Temperature ..................................................... 115°C
Storage Temperature (T
S
) .........................
65C
to
150°C
Operating Ratings
(3)
Supply Voltage (V
DD
, V
DDO1/2
) ............... +2.375V to +3.465V
Ambient Temperature (T
A
) .......................... –40°C to +85°C
(4)
Junction Thermal Resistance
QFN (
JA
) Still-Air ............................................... 24°C/W
QFN (
JB
) Junction-to-Board ............................... 8°C/W
DC Electrical Characteristics
(4)
VDD = VDDO1/2 = 3.3V
5%
or 2.5V
5%
VDD = 3.3V
5%,
VDDO1/2 = 3.3V
5%
or 2.5V
5%
TA =
40C
to
85C.
Symbol
V
DD
,
V
DDO1/2
V
DD
,
V
DDO1/2
Parameter
2.5V operating range
3.3V operating range
Eight outputs enabled, 100MHz
Outputs 50Ω to V
SS
Eight outputs enabled, 200MHz
Outputs 50Ω to V
SS
Four outputs enabled, 100MHz
Outputs 50Ω to V
SS
, OE1 or OE2 = 0
Four outputs enabled, 200MHz
Outputs 50Ω to V
SS
, OE1 or OE2 = 0
Condition
Min.
2.375
3.135
Typ.
2.5
3.3
217
229
149
158
Max.
2.625
3.465
270
285
mA
185
197
Units
V
V
I
DD
Supply current V
DD
+ V
DDO
HCSL DC Electrical Characteristics
(4)
V
DD
= V
DDO1/2
= 3.3V
5%
or 2.5V
5%
V
DD
= 3.3V
5%,
V
DDO1/2
= 3.3V
5%
or 2.5V
5%
T
A
=
40C
to
85C.
R
L
= 50Ω to V
SS
Symbol
V
OH
V
OL
V
CROSS
Parameter
Output high voltage
Output low voltage
Crossing point voltage
Condition
Min.
660
-150
250
Typ.
700
0
350
Max.
850
27
550
Units
mV
mV
mV
December 11, 2013
5
Revision 1.1
hbwhelp@micrel.com
or (408) 955-1690
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