Data Sheet

VOLTAGE CONTROLLED
CRYSTAL OSCILLATORS
ECLPS 5V PECL with Extremely Low Jitter
Complementary Output
Thru-Hole
These VCXOs provide complementary PECL outputs thru 175 MHz
with extremely fast rise and fall times. Each oscillator is computer
tuned and computer tested to guarantee stability and frequency
pull at 0º, 25º and 70ºC. All oscillators will capture the rated pull
at all operating temperatures.
FEATURES
• Jitter less than 1 ps RMS from 12 KHz to 20 MHz
• Super low jitter of 20 ps peak to peak maximum limits loss of data packets in digital data recovery
• Will drive standard interface chips in complementary PECL.
• Duty Cycle is typically 48/52
• Three frequency deviation choices
• Output is PECL with typical rise and fall times of 225 ps
• Exceptional linearity with Deviation Sensitivity Ratio not exceeding 2.0
• Package is choice of double DIL, standard DIL with 7 pins (M1)
TYPICAL APPLICATIONS
• Used in Sonet ST33 interface for generation of the transmitter data clock
SPECIAL APPLICATION NOTES
• All outputs must be loaded with 270 ohms to ground, or 50 ohms to +3V
• Outputs will drive all PECL families when they are operated in PECL configurations
0.98 max
(24.89)
0.80 max
(20.32)
DOT
DENOTES
PIN 1
Square corner indicates Pin 1
0.275 max
(6.99)
.20 MAX
.20 MIN.
.100 typ
0.20/0.30
(.025)
(.50/.76)
0.700 ±.005
0.20.24
(17.78 ±.13)
(0.51/.61
Centrally Located
Pin 1
.016/.019 Dia
(.41/.48), 16 pins
.018 – .001
100 TYP (NON
ACCUMULATIVE)
Pin 1
2
M2911 thru M2913
DOUBLE WIDE D.I.L.
W package
W2911 thru W2913
W2971 thru W2973
Description
Commercial: 0º to 70ºC
15 MHz to 175 MHz
5
14
FULL SIZE D.I.L.
M package
7
9
8
.300
– .005
44 MAX
.300 – .005
.500 – .005
8
0.600 ±.005
Centrally Located
150
16
9
Glass Insulators (3)
.800 – .005
“M-1” Package
“W1” Package
These ECLPS VCXOs feature super-low
jitter of 20 ps peak-to-peak — within the
bandwidth of 12 KHz to 20 MHz the jitter
will not exceed 1 ps RMS. They are
based on the same logic as our M2910s
fixed frequency oscillators, and therefore
exhibit identical waveform characteristics.
These thru-hole VCXOs are designed for
compatibility with digital and communications systems based on the ECLPS
family of high speed PECL logic.
Users have a choice of the three most
widely used combinations of pull, control
voltage and center frequency deviation.
The oscillators are available at frequencies
from 15 to 175 MHz. Standard frequency
stability is ±20 ppm.
All models have dual complementary
outputs. All feature 250 ps typical rise/fall
times and provide superior jitter. Their low
output impedance and dual complementary outputs preserve waveform symmetry
when sending the timing waveforms over
appreciable distance. Output symmetry of
45/55 is standard.
Designed originally for advanced SONET
applications, their combination of advanced
characteristics provides special appeal to
designers of highly evolved phase-lockedloop circuits. They provide tight control of
the voltage-to-frequency (∆F/∆V) transfer
function and feature jitter specifications of
less than 20 pico-seconds peak-to-peak.
Typical RMS jitter is 2.048 ps RMS.
These VCXOs are hermetically sealed in
full size (H) or wide (W) DIL packages.
Models W2911 through W2913 accept
control voltage input on pin 1, while
Models W2971 through W2973 accept
control voltage on pin 6. All models are
tested and guaranteed over full 0°C to
70°C temperature.
ELECTRONICS
10 Commerce Dr • New Rochelle NY 10801
International Sales: +1.914-712-2200 • USA Sales: +1.800.331.1236 • Fax: 914.712.2290 • www.mfelectronics.com • email:[email protected]
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VOLTAGE CONTROLLED
CRYSTAL OSCILLATORS
ECLPS 5V PECL with Extremely Low Jitter
Complementary Output
Thru-Hole
FULL SIZE D.I.L.
M package
M2911 thru M2913
DOUBLE WIDE D.I.L.
W package
W2911 thru W2913
W2971 thru W2973
Commercial: 0º TO 70ºC
15 MHz to 175 MHz
ENVIRONMENTAL SPECIFICATIONS
Temperature
Operating
0º to 70°C
Storage
-55º to +125°C
ONE DIL WIDE, M1 Package
Model
Control
Voltage
for Nominal
(Center) Freq.
Frequency
Stability
@
Center
M2911
M2912
2.5 volts
±20 ppm
M2913
Frequency Deviation
0.5 volts
4.5 volts
-50 to -100 ppm
50 to 100 ppm
-75 to -150 ppm
75 to 150 ppm
-100 to -200 ppm
100 to 200 ppm
Temperature Cycle – Not to exceed ±5 ppm change when exposed to 2
hours maximum at each temperature from 0 to 120°C, with 25°C reference
Shock – 1000 Gs, 0.35 ms, 1/2 sine wave, 3 shocks in each plane
Vibration – 10-2000 Hz of .06" d.a. or 20 Gs, whichever is less
Humidity – Resistant to 85° R.H. at 85°C
DOUBLE DIL WIDE, W1 Package
Voltage
Control
on
Pin 1
Voltage
Control
Control
Voltage
on
for Nominal
Pin 6 (Center) Freq.
W2911
W2971
W2912
W2972
W2913
W2973
2.5 volts
Frequency
Stability
@
Center
MECHANICAL SPECIFICATIONS
Shock – 1000 Gs, 0.35 ms. 1/2 sine wave, 3 shocks in each plane
Vibration – 10-2000 Hz of .06” d.a. or 20 Gs, whichever is less
Humidity – Resistant to 85% RH at 85°C
Frequency Deviation
±20 ppm
0.5 volts
4.5 volts
-50 to -100 ppm
50 to 100 ppm
-75 to -150 ppm
75 to 150 ppm
-100 to -200 ppm
100 to 200 ppm
Leak – MIL STD 883, Method 1014, condition A1
ELECTRICAL SPECIFICATIONS
Frequency Range 15 MHz to 175 MHz
Frequency Stability Includes calibration at 25°C, operating temperature,
change of input voltage, change of load, shock and
vibration.
MIN
TYP
MAX
UNITS
4.5
5.0
5.5
volts
Input Voltage, VDD
Input Current, including load
current of both ouputs
at 4.5V
60
ma
at 5.0V
68
ma
at 5.5V
76
ma
Output Levels (PECL),
at 5.0 VDD
“0” Level,
3.2
3.37
volts
“1” Level,
4.02
4.1
volts
Symmetry
differential
48/52
45/55
Input Impedance
50
1000
Kohms
Control Voltage Bandwidth
10
20
KHz
Control Voltage, Vc
0
0.5 to 4.5
15
Volts, DC
Jitter,
with Tektronix 11801B &
SD22 Head in jitter color mode
15
20
ps, Pk-Pk
with Agilent Phase Noise System
E5500, from 12 KHz to 20 MHz
1
ps RMS
Linearity
best straight line, percent of total
5
10
%
deviation sensitivity ratio
2
Rise Time (20 to 80%)
100
225
350
ps
Fall Time (20 to 80%)
100
225
350
ps
Pins – Kovar, with 7 microinch gold over nickel
Bend Test – Will withstand two bends of 90° from reference
Header – Steel with gold over nickel
Case – Stainless steel, type 304
Marking – Resistant to 85% RH at 85°C
Resistance to Solvents – MIL STD 202, Method 215
CONNECTIONS
All single
DIL models
W2911W2913
W2971W2973
Pin
1
2
5
7
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Used For
Control Voltage Input, Vc
Not Used
Not Used
Ground, VSS
Control Voltage Input
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Ground, VSS
Not Used
Not Used
Not Used
Not Used
Not Used
Control Voltage Input, Vc
Not Used
Ground, VSS
Pin
8
9
14
Used For
Output 1
Output 2 (Complement)
+5V, VDD
9
10
11
12
13
14
15
16
9
10
11
12
13
14
15
16
Output 1
Output 2
Not used
Not used
Not used
Not used
Not used
+5V, VDD
Output 1
Output 2
Not used
Not used
Not used
Not used
Not used
+5V, VDD
ELECTRONICS
10 Commerce Dr • New Rochelle NY 10801
International Sales: +1.914-712-2200 • USA Sales: +1.800.331.1236 • Fax: 914.712.2290 • www.mfelectronics.com • email:[email protected]
2 of 3
VOLTAGE CONTROLLED
CRYSTAL OSCILLATORS
ECLPS 5V PECL with Extremely Low Jitter
Complementary Output
Thru-Hole
FULL SIZE D.I.L.
M package
M2911 thru M2913
DOUBLE WIDE D.I.L.
W package
W2911 thru W2913
W2971 thru W2973
Commercial: 0º TO 70ºC
15 MHz to 175 MHz
Waveforms taken on TEK 11801B with SD-22 Head
Fig. 1: 155.52 MHz PECL oscillator,
showing steep rise and fall times and
excellent duty cycle. Levels have 900 mv
difference between “1” and “0”.
Fig. 2: M2912-77.76 MHz oscillator with
expansion of transition at 3.7 volts. Jitter is
shown by the histogram of the distribution
of the waveform at 3.7 volts. The distribution is unimodal, with peak-to-peak jitter
of 16 ps peak-to-peak, and 2.27 ps RMS.
HOW TO ORDER
For Part Number, put package type before model number,
and add frequency in MHz, for example:
M 2 9 1 2- 7 7 . 7 6 M
“M” is full size DIL
“W” is double wide DIL
SS#
Rev.
M2911
A
“2912”
is model
type
“77.76 M”
frequency
in MHz
ELECTRONICS
Unless customer-specific terms and conditions
are signed by an officer of MF Electronics, the
sale of this and all MF Electronics products are
subject to terms and conditions set forth at
www.mfelectronics.com/terms
10 Commerce Dr • New Rochelle NY 10801
International Sales: +1.914-712-2200 • USA Sales: +1.800.331.1236 • Fax: 914.712.2290 • www.mfelectronics.com • email:[email protected]
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