ETC1 IQTCXO-251 Temperature compensated crystal oscillator Datasheet

IQTCXO-250, -251, -252
ISSUE 7; 14 OCTOBER 2004
Outline in mm
Delivery Options
18.5±0.3
∅3.8
Please contact our sales office for current leadtimes
12.0±0.3
Description
IQTCXO-250, -251, -252 are temperature compensated
crystal oscillators (TCXOs), providing a high degree of
frequency stability over a wide temperature range.
6.55
Waveform
Clipped Sine 1V pk - pk min
■
Square HCMOS
■
Clipped Sine 0.7V pk - pk min
∅0.5
4.0±0.2
Package Outline
■
14 pin DIL compatible enclosure with internal trimmer
1
4.0±0.2
4.0 min
■
Pin Connections
1. N/C
7. GND
8. Output
14. +Vs
5.0 max
■
1.0±0.2
■
7.62±0.3
7
Ageing
■
14
±1ppm typical first year
8
15.24±0.3
Frequency Adjustment
■
±3ppm minimum internal trimmer adjustment
Output Waveform - HCMOS
Storage Temperature Range
■
–40 to 85°C
tf
LEADED TCXOs
Marking
■
Model number
■
Frequency Stability Code/Operating Temperature Code
■
Frequency
■
Date Code (Year/Week)
tr
+Vs
90%Vs
1/2Vs
10%Vs
Minimum Order Information Required
■
0V
t
Frequency + Model Number + Frequency Stability
+ Operating Temperature
T
Duty cycle = t x 100(%)
T
Test Circuit - HCMOS
A
+Vs
Oscillator
7
14 8
V
0.1µF
15pF* Oscilloscope
Frequency counter
*Inclusive of jigging & equipment capacitance
72
Electrical Specifications - maximum limiting values when measured in test circuit
Frequency Range
Supply Voltage
3.20 to 40.0MHz
5V±0.25V
Supply Current Output Waveform
5mA
3.20 to 40.0MHz
5V±0.25V
20mA
3.20 to 40.0MHz
3V±0.15V
3mA
Output
Duty Cycle
Model Number
1Vpk-pk min
—
IQTCXO-250
Square
HCMOS
40/60%
IQTCXO-251
Clipped Sine
0.7Vpk-pk min
—
IQTCXO-252
Clipped Sine
Frequency Stabilities Available Over Operating Temperature Ranges
Operating
Frequency Range
±1.5ppm
Frequency Stabilities Vs Operating Temperature Range
±2.0ppm
±2.5ppm
±5.0ppm
0 to 50°C
Code CP
Code GP
Code HP
Code KP
-10 to 60°C
—
Code GR
Code HR
Code KR
-20 to 70°C
—
—
Code HS
Code KS
-30 to 75°C
—
—
Code HU
Code KU
-40 to 85°C
—
—
—
Code KX
Ordering Example
24.0MHz
IQTCXO-250 HR
Frequency
Model number
Frequency Stability Vs Operating Temperature Code
Test Circuit - Clipped Sine
A
+Vs
Oscillator
V
0.1µF
7
8
10pF*
10k
LEADED TCXOs
14
Oscilloscope
Frequency counter
*Inclusive of jigging & equipment capacitance
73
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