The PL135-27 is an advanced oscillator fanout buffer
design for high performance, low-power, small form-factor
applications. The PL135-27 accepts a fundamental crystal
input of 10MHz to 40MHz and produces two LVCMOS
outputs of the same frequency. The PL135-27 is designed
to fit in a small 2mm × 1.3mm DFN package and offers the
best phase noise, jitter performance and lowest power
consumption of any comparable IC.
Datasheets and support documentation are available on
Micrel’s web site at:
www.micrel.com.
Features
•
•
•
•
•
•
•
•
Advanced oscillator design for wide frequency coverage
Two LVCMOS outputs
8mA output drive strength
Input/output frequency: 10MHz to 40MHz fundamental
crystal
Very low jitter and phase noise
Low current consumption
Single 1.62V to 3.63V power supply
Available in 2.0mm × 1.3mm DFN-6L, GREEN/RoHS-
compliant package
Block Diagram
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 •
http://www.micrel.com
September 8, 2014
Revision 2.0
tcghelp@micrel.com
or (408) 955-1690
Micrel, Inc.
PL135-27
Ordering Information
Part Number
PL135-27GC-R
PL135-27GI-R
Note:
1. LLL designates lot number.
Ambient Temperature Range
0°C to +70°C
-40°C to +85°C
Marking
J27
LLL
(1)
Package
6-Pin 2.0mm × 1.3mm DFN
Pin Configuration
6-Lead DFN
Pin Description
Pin Number
DFN-6L
1
2
3
4
5
6
Pin Name
XIN
CLK1
GND
CLK0
VDD
XOUT
Type
I
O
P
O
P
O
Pin Description
Crystal input
Clock output
GND connection
Clock output
V
DD
connection
Crystal output
September 8, 2014
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Micrel, Inc.
PL135-27
Absolute Maximum Ratings
(2)
Supply Voltage (V
DD
) .................................... –0.5V to +4.6V
Output Voltage (V
OUT
) ............................ –0.5V to V
DD
+0.5V
Storage Temperature (T
S
) ......................... –65°C to +150°C
Operating Ratings
(3)
Supply Voltage (V
DD
) ................................ +1.62V to +3.63V
Ambient Temperature (T
A
) .......................... –40°C to +85°C
AC Electrical Characteristics
V
DD
= 1.8V ±10%, 2.5V ±10% or 3.3V ±10%; C
L
= 15pF; T
A
= -40°C to +85°C, unless otherwise noted
Symbol
F
X
t
SETTLE
dF/dV
DD
t
R
t
F
t
SKEW
D-C
Notes:
2. Exceeding the absolute maximum ratings may damage the device.
3. The device is not guaranteed to function outside its operating ratings.
Parameter
Crystal Input Frequency
Settling Time
V
DD
Sensitivity
Output Rise Time
Output Fall Time
Output to Output Skew
Duty Cycle
Condition
Fundamental crystal
At Power-Up (V
DD
> 1.62V)
Frequency vs. V
DD
, ±10%
10/90% V
DD
, V
DD
=3.3V
90/10% V
DD
, V
DD
=3.3V
Min.
10
Typ.
Max.
40
2
Units
MHz
ms
ppm
ns
ns
ps
%
-0.5
2
2
0.5
3
3
500
45
50
55
DC Electrical Characteristics
V
DD
= 1.8V ±10%, 2.5V ±10% or 3.3V ±10%; C
L
= 15pF; T
A
= -40°C to +85°C, unless otherwise noted
Symbol
Parameter
Condition
V
DD
= 3.3V, 25MHz, No Load
I
DD
Supply Current, Dynamic
V
DD
= 2.5V, 25MHz, No Load
V
DD
= 1.8V, 25MHz, No Load
V
DD
V
OL
V
OH
I
OSD
Operating Voltage
Output Low Voltage
Output High Voltage
Output Current
I
OL
= +4mA, 3.3V
I
OH
= -4mA, 3.3V
V
OL
= 0.4V, V
OH
= 2.4V
2.4
8
1.62
Min.
Typ.
1.6
1.2
0.9
3.63
0.4
Max.
Units
mA
mA
mA
V
V
V
mA
Crystal Specifications
V
DD
= 1.8V ±10%, 2.5V ±10% or 3.3V ±10%; C
L
= 15pF; T
A
= -40°C to +85°C, unless otherwise noted
Symbol
F
XIN
C
L(xtal)
P
D
C0
ESR
Parameter
Fundamental Crystal
Resonator Frequency
Crystal Loading Rating
Operating Drive Level
Shunt Capacitance
Effective Series Resistance
C0 ≤ 5.5pF
C0 ≤ 2.5pF
Condition
Min.
10
12
0.1
2
5.5
40
60
Typ.
Max.
40
Units
MHz
pF
mW
pF
Ω
Ω
September 8, 2014
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Revision 2.0
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PL135-27
Layout Recommendations
The following guidelines are to assist you with a performance optimized PCB design:
Signal Integrity and Termination Considerations
•
Keep traces short.
•
Trace = Inductor. With a capacitive load this equals
ringing.
•
Long trace = Transmission Line. Without proper
termination this will cause reflections (looks like ringing).
•
Design long traces as “striplines” or “microstrips” with
defined impedance.
•
Match trace at one side to avoid reflections bouncing
back and forth.
Decoupling and Power Supply Considerations
•
Place decoupling capacitors as close as possible to the
VDD pin(s) to limit noise from the power supply
•
Multiple VDD pins should be decoupled separately for
best performance.
•
Addition of a ferrite bead in series with VDD can help
prevent noise from other board sources
•
Value of decoupling capacitor is frequency dependent.
Typical value to use is 0.1µF.
September 8, 2014
4
Revision 2.0
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or (408) 955-1690
Micrel, Inc.
PL135-27
Package Information
(4)
6-Lead DFN
Note:
4. Package information is correct as of the publication date. For updates and most current information, go to
www.micrel.com.
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB
http://www.micrel.com
Micrel, Inc. is a leading global manufacturer of IC solutions for the worldwide high performance linear and power, LAN, and timing & communications
markets. The Company’s products include advanced mixed-signal, analog & power semiconductors; high-performance communication, clock
management, MEMs-based clock oscillators & crystal-less clock generators, Ethernet switches, and physical layer transceiver ICs. Company
customers include leading manufacturers of enterprise, consumer, industrial, mobile, telecommunications, automotive, and computer products.
Corporation headquarters and state-of-the-art wafer fabrication facilities are located in San Jose, CA, with regional sales and support offices and
advanced technology design centers situated throughout the Americas, Europe, and Asia. Additionally, the Company maintains an extensive network
of distributors and reps worldwide.
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this datasheet. This
information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,
specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual
property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability
whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties
relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical
implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
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