Best stability
Min.
1.25 MHz
Max.
100 MHz
OC18T
OC18E
±0.01 ppm ( SC-cut )
Voltage Control
5 pins
12V
5.0V
±0.02 ppm ( AT-cut )
Square Wave
True Sine Wave
Applications
● OC18_ ( 20.3 * 20.3 * 10.5 mm ) , 5 pin solder sealed metal package
● +12.0V , +5.0V Supply Voltages
● " AT - cut " crystal or " SC - cut " crystal
● Voltage control ( Electronic Frequency Tuning ) is standard .
General Specifications ( at+25°C and specified input voltage )
Type of Crystal Cut Used
Output Wave From
AT - cut , use " A " for crystal code ; SC - cut , use " S " for crystal code .
Square wave. Wave form code is “ T ”
True Sine Wave. Wave form code is “ E ”
Supply Voltage
+12V
+5 V
+12V
+5 V
Supply Voltage range , " Voltage code "
Frequency Range
+12V ± 0.5V , " 12 "
1.25 ~ 100.0 MHz
± 0.5 ppm ( max.)
Vcon = +2.5 V
+5.0V ± 0.2V , " 5 "
1.25 ~ 100.0 MHz
± 0.5 ppm ( max.)
Vcon = +2.5 V
+12V ± 0.5V , " 12 "
10.0 ~ 100.0 MHz
± 0.5 ppm ( max.)
Vcon = +2.5 V
+5.0V ± 0.2V , " 5 "
10.0 ~ 100.0 MHz
± 0.5 ppm ( max.)
Vcon = +2.5 V
Initial Calibration Tolerance
vs Temperature ( ppm )
0 ~ 60 °C
AT - cut
SC - cut
± 0.01
± 0.01
± 0.03
AT - cut
SC - cut
± 0.01
± 0.01
± 0.03
AT - cut
SC - cut
± 0.01
± 0.01
± 0.03
AT - cut
SC - cut
± 0.01
± 0.01
± 0.03
± 0.02
± 0.05
± 0.1
± 0.02
± 0.05
± 0.1
± 0.02
± 0.05
± 0.1
± 0.02
± 0.05
± 0.1
-20 ~ 70°C
Frequency
Stability
-40 ~ 85°C
AT - cut : 3.0 minutes ( max.) , within ± 0.5 ppm of its reference frequency .
SC - cut : 1.0 minutes ( max.) , within ± 0.1 ppm of its reference frequency .
vs Warm -up time (+25°C)
AT - cut : ± 5.0 ppb ( max.) / day , ± 0.5 ppm ( max.) / first year , ± 3.0 ppm ( max.) over 10 years .
SC - cut : ± 2.0 ppb ( max.) / day , ± 0.1 ppm ( max.) / first year , ± 0.5 ppm ( max.) over 10 years .
vs Aging
vs Voltage Change
vs Load Change
≦ ±20 ppb , supply voltage ±5 % variation
≦ ±20 ppb , for a ±5 % load condition change .
Voltage Control
AT - cut : ± 5.0ppm (min.) , ± 20ppm (max.) Reference to fo at +25°C and over operating temperature range .
SC - cut : ± 0.5ppm (min.) , ± 2.0ppm (max.) Reference to fo at +25°C and over operating temperature range .
Freq. Deviation Range
On pin 1 (EFC) Control Voltage Range
Transfer Function
2.5 V ± 2.0 V
Positive : Increasing control voltage increases output frequency .
100 K ohms ( min.)
( Electronic
Input Impedance
EFC Linearity
Freq. Tuning )
± 10 % ( max.)
Power
Power Dissipation ( at +25°C )
Output Level ( for True Sine )
Harmonic ( for True Sine )
Spurious ( for True Sine )
Load ( Fan out )
200 mA (max.) at steady-state ; 500 mA (max.) at turn-on
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+3 dBm ( typ.) , +8 dBm ( max.) into 50Ω load .
-30 dBc ( min.)
-75 dBc ( min.)
15 pF HCMOS ( max.)
+4.5 V ( min.)
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Output Logic High ( VOH
Output Logic Low ( VOL
)
)
+ 0.5 V ( max.)
50 % ± 10%
Duty Cycle ( at 50% Vcc )
Rise and Fall Time ( 20% ~ 80%)
Reference Voltage
5 nS ( max.) ( measured at 20% → 80% of waveform )
Output
+ 4.0 VD.C. ± 0.3 VD.C. or custom
Crystal Type
Crystal Type
Crystal Type
Crystal Type
Offset
Offset
Offset
Offset
AT - cut
SC - cut
-85
AT - cut
SC - cut
-85
AT - cut
-75
SC - cut
-85
AT - cut
-75
SC - cut
-85
1 HZ
1 HZ
1 HZ
1 HZ
-75
-75
Phase Noise ( 10.0 MHz )
[ Unit : dBc / Hz ] ( typical )
10 Hz
100 Hz
1 KHz
10 KHz
10 Hz
100 Hz
1 KHz
10 KHz
10 Hz
100 Hz
1 KHz
10 KHz
10 Hz
100 Hz
1 KHz
10 KHz
-100
-130
-140
-150
-120
-140
-145
-150
-100
-130
-140
-150
-120
-140
-145
-150
-100
-130
-140
-150
-120
-140
-145
-150
-100
-130
-140
-150
-120
-140
-145
-150
Storage Temperature
Shock
- 55°C to + 125°C
2000 G's , 0.3 ms 1/2 sine
10 to 2000 Hz / 10 G's
Vibration
Mercury www .mercury-crystal.com
■Taiwan : Tel (886)-2-2406-2779 / sales-tw@mercury-crystal.com ■U.S.A: Tel: (1)-909-466-0427 / sales-us@mercury-crystal.com ■China: Tel: (86)-512-5763-8100 / sales-cn@mecxtal.com