SEL381 Series
3.3V PECL High Frequency
Crystal Clock Oscillator (XO)
Actual Size = 5 x 7mm
Packaging Outline
2.00 max
.079
Pin Functions
Pin
Function
Product Features
• Less than 3 ps RMS jitter
• Tight stability over a broad range of operating
conditions
• 3.3V PECL (LVPECL) compatible logic levels
• Designed for standard reflow and washing
techniques
• Pb-free and RoHS/Green compliant
#6
#5
7.00±0.15
.276±.006
1
2
3
4
OE or NC
OE or NC
V
EE
Q Output
Q Output
V
CC
#1
#2
#3
5.00±0.15
.197±.005
• Pin-compatible with standard 5x7mm packages
5
6
#4
Product Description
The SEL381 Series is a 3.3V crystal clock oscillator
that achieves superb stability over a broad range of
operating conditions and frequencies. The output
clock signal is compatible with LVPECL logic levels.
The device, available on tape and reel, is contained in
a 5x7mm surface-mount ceramic package.
Common Frequencies
Contact SaRonix for additional frequencies
Applications
The SEL381 Series is an ideal reference clock for high-
speed applications including:
• 1/10 Gigabit Ethernet
• 2/4/10G FibreChannel
• Serial Attached SCSI (SAS)
• Server & Storage platforms
• SONET/SDH linecards
25.0000 MHz
38.8800 MHz
62.5000 MHz
66.0000 MHz
66.6667 MHz
75.0000 MHz
77.7600 MHz
100.0000 MHz
106.2500 MHz
125.0000 MHz
133.0000 MHz
150.0000 MHz
155.5200 MHz
156.2500 MHz
159.3750 MHz
160.0000 MHz
161.1328 MHz
187.5000 MHz
200.0000 MHz
212.5000 MHz
250.0000 MHz
312.5000 MHz
350.0000 MHz
400.0000 MHz
425.0000 MHz
500.0000 MHz
622.0800 MHz
625.0000 MHz
644.5312 MHz
Ordering Information
SaRonix
Product Series
Output Enable/Disable Function
0 = N/C pin 1, N/C pin 2
1 = OE low true pin 1, N/C pin2
2 = N/C pin 1, OE low true pin2
3 = OE high true pin 1, N/C pin 2
4 = N/C pin 1, OE high true pin2
S EL381 3 B - 156.2500 (T)
Packaging
(T) = Tape & Reel
full reel increments
Blank = Bulk packaged
Output Frequency
(MHz)
Frequency Stability
AA = ±20 ppm (0 to +70°C)
A = ±25 ppm (0 to +70°C)
B = ±50 ppm (0 to +70°C)
E = ±50 ppm (-40 to +85°C)
H = ±32
ppm (-40
to +85°C)
Pericom Semiconductor Corporation • 1-800-435-2336 • http://www.pericom.com/saronix
1
All specifications are subject to change without notice.
DS 225 Rev B | 03/30/05
SEL381 Series
3.3V PECL High Frequency
Crystal Clock Oscillator (XO)
Electrical Performance
Parameter
Min.
Typ.
Max.
Units
Notes
Output frequency
Supply voltage
Supply current
Frequency stability
Operating temperature
Output logic 0, V
OL
Output logic 0, V
OL
Output logic 1, V
OH
Output logic 1, V
OH
Output load
Duty cycle
Rise and fall time
Jitter, phase
Jitter, accumulated
Jitter, total
25
2.97
3.3
85
-40
670
3.63
110
±20 to ±50
+85
V
CC
– 1.620
V
CC
– 1.555
MHz
V
mA
ppM
°C
V
V
V
V
As specified
See Note 1 below
As specified
0 to +85°C
-40 to 0°C
0 to +85°C
-40 to 0°C
output requires termination
measured 50% of waveform
measured 20/80% of waveform
12kHz to 40MHz frequency band
20,000 adjacent periods
100,000 random periods
V
CC
– 1.025
V
CC
– 1.085
50Ω to V
CC
– 2V
45
55
850
3
10
40
%
ps
ps RMS (1-σ)
ps RMS (1-σ)
ps
pk-pk
Notes:
1. As specified. Stability includes all combinations of operating temperature, load changes, rated input (supply) voltage changes, initial calibration
tolerance (25°C), aging (5 years at 40°C average effective ambient temperature), shock and vibration.
Output Enable / Disable Function (SEL3813 and SEL 3814)
Parameter
Min.
Typ.
Max.
Units
Notes
Input Voltage (OE pin),
Output Enable
Input voltage (OE pin),
Output Disable
V
OH
V
OL
V
V
or open
Outputs disabled to Hi-Z
Output Enable / Disable Function (SEL3811 and SEL 3812)
Parameter
Min.
Typ.
Max.
Units
Notes
Input Voltage (OE pin),
Output Enable
Input voltage (OE pin),
Output Disable
V
OH
V
OL
V
V
or open
Outputs disabled to Hi-Z
Pericom Semiconductor Corporation • 1-800-435-2336 • http://www.pericom.com/saronix
2
All specifications are subject to change without notice.
DS 225 Rev B | 03/30/05
SEL381 Series
3.3V PECL High Frequency
Crystal Clock Oscillator (XO)
Typical Phase Noise
Typical Output Waveform
Pericom Semiconductor Corporation • 1-800-435-2336 • http://www.pericom.com/saronix
3
All specifications are subject to change without notice.
DS 225 Rev B | 03/30/05
SEL381 Series
3.3V PECL High Frequency
Crystal Clock Oscillator (XO)
Absolute Maximum Ratings
Parameter
Min.
Typ.
Max.
Units
Notes
Storage temperature
-55
+125
°C
Test Circuit
+2V
6
0.1µF
-1.3V
Test Point
(Termination
internal to scope)
5
2
4
3
50½
50½
0.01µF
1
Output Enable/Disable Function
(OE function present on specified pin)
Reliability Test Ratings
This product is rated to meet the following test conditions:
Type
Parameter
Test Condition
Mechanical
Mechanical
Mechanical
Mechanical
Mechanical
Mechanical
Environmental
Environmental
Environmental
Environmental
Shock
Solderability
Terminal strength
Gross leak
Fine leak
Solvent resistance
Thermal shock
Moisture resistance
Vibration
Resistance to soldering heat
MIL-STD-883, Method 2002, Condition B
MIL-STD-883, Method 2003
MIL-STD-883, Method 2004, Condition D
MIL-STD-883, Method 1014, Condition C
MIL-STD-883, Method 1014, Condition A2 (R
1
= 2x10
-8
atm cc/s)
MIL-STD-202, Method 215
MIL-STD-883, Method 1011, Condition A
MIL-STD-883, Method 1004
MIL-STD-883, Method 2007, Condition A
MIL-STD-202, Method 210, Condition I or J
Pericom Semiconductor Corporation • 1-800-435-2336 • http://www.pericom.com/saronix
4
All specifications are subject to change without notice.
DS 225 Rev B | 03/30/05
SEL381 Series
3.3V PECL High Frequency
Crystal Clock Oscillator (XO)
Output Waveform
t
f
VOH
t
r
80%
50%
20%
VOL
t
A
Duty cycle = 100%
x
(t
A
)
/
(t
A
+
t
B
)
t
B
Reflow Soldering Profile
As per IPC/JEDEC J-STD-020C
1 to 3°C/sec max
Peak 260°C for 10 sec max
1 to 3°C/sec
217
Temperature – °C
260
Time
60 to 90 sec
4 to 6 minutes max
Pericom Semiconductor Corporation • 1-800-435-2336 • http://www.pericom.com/saronix
5
All specifications are subject to change without notice.
DS 225 Rev B | 03/30/05
