MX681EBA156M250
Ultra-low Jitter 156.25MHz LVPECL XO
Rev0.6 7/7/14
Description
The MX681EBA156M250 is an ultra-low phase jitter and
phase noise XO with LVPECL output optimized for high
line rate applications.
Features
156.25MHz LVPECL output
Ultra-low 46fs output jitter (12kHz to 20MHz)
±50ppm total stability
40°C
to +85°C temperature range
Industry standard 5x7mm package
Applications
10/40/100GE
Telecom, NAS, Networking, Storage
Absolute Maximum Ratings
Supply Voltage (V
IN
)
Lead Temperature (soldering, 10s)
Storage Temperature (T
s
)
ESD Rating
+4V
260°C
125°C
2kV
Operating Ratings
Supply Voltage (V
IN
)
Ambient Temperature (T
A
)
Junction Thermal Resistance
PDIP (
JA
)
+2.97V to +3.63V
–40°C to +85°C
xx°C/W
Electrical Characteristics
V
DD
=3.3±10%,
40°C
to 85°C, terminated 50Ω to V
DD
2V
Symbol
I
DD
F
0
Parameter
Supply Current
Center Frequency
Stability
Note 2
Phase jitter (12kHz to 20MHz)
Φ
J
Jitter
Phase jitter (1.875MHz to 20MHz)
Phase jitter (50kHz to 80MHz)
Period jitter.
t
START
V
OH
V
OL
t
R
/t
F
V
IH
V
IL
Startup Time
Output Voltage High
Output Voltage Low
Duty Cycle
Rise/Fall Time
OE input Voltage High
OE Input Voltage Low
Output disabled when OE is high
Outputs enabled when OE is low for floating
45
300
VDD × 0.7
VDD × 0.3
LVPECL output levels
VDD
1.02
VDD
1.62
55
V
%
ps
V
V
46
43
100
1.7
20
ps
ms
fsRMS
Condition
Outputs loaded with 50 Ohms to VDD-2V
156.25
±50
(1)
Min.
Typ.
Max.
65
Units
mA
MHz
PPM
Notes:
1. Guaranteed after thermal equilibrium.
2. Inclusive of initial accuracy, temperature drift, aging, shock, vibration from -40°C to 85°C.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 •
http://www.micrel.com
Jul 2014
M9999-xxxxxx-A
hbwhelp@micrel.com
or (408) 955-1690
Micrel, Inc.
MX681EBA156M250
Ordering Information*
Part Number
MX681EBA156M250
MX681EBA156M250 TR
Line 1 Marking
MX681E
MX681E
Line 2 Marking
BA156M250
BA156M250
Shipping
Tube
Tape&Reel
Temperature Range
40°C
to 85°C
40°C
to 85°C
Package
6-pin 5x7mm
6-pin 5x7mm
*Line 3 marking is datecode information. See figu
Phase Noise Performance
1.875MHz to 20MHz Integration Range
12kHz to 20MHz Integration Range
Period Jitter (37536 samples)
Jul 2014
2
M9999-xxxxxx-A
tcghelp@micrel.com
or (408) 955-1690
Micrel, Inc.
MX681EBA156M250
Dimensions, Pin Assignment, Land Pattern
Date Code Information
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 makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. 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.
© 2012 Micrel, Incorporated.
Jul 2014
3
M9999-xxxxxx-A
tcghelp@micrel.com
or (408) 955-1690
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