“ T C X O” and “V C T C X O”

MERCURY
“ T C X O” and “V C T C X O”
Since 1973
What is a TCXO ?
By the integration of a resistor / capacitor compensation network and a sensor circuitry, the frequency
stability of a crystal oscillator (XO) can be improved by about 100 times. The resultant reactance change from
the compensation network offsets the frequency-temperature (F-T) characteristics of the crystal. The F-T
characteristics is unique to individual crystal, therefore each unit is individually temperature compensated in
the TCXO manufacturing.
At Mercury, our computerized temperature cycling chambers, data acquisition system and unique network
calculation software allow us to produce low cost and high quality TCXOs. Most importantly, it is Mercury
crystal inside.
Crystal
From Compensation
∆f
f
After Compensation
A
Output
C
B
Temperature(°c)
A + (-B) = C
Before Compensation
Compensation
Network
Oscillator
Product Features:
♦ Variety of packages to choose from including hermetically sealed, non-hermetically sealed, thru-hole
and SMD
♦ Electronic frequency tuning (for VCTCXO): The output frequency can be tuned up or down
electronically by the control voltage applied on the voltage control pin.
♦ Mechanical frequency tuning (for TCXO and VCTCXO): Trimmer (variable capacitor) is used to adjust
the output frequency mechanically.
♦ Unique crystal design to achieve lowest possible phase noise, aging and frequency
perpetration
♦ Quick-turn service available: 1~4 weeks for selected packages. Custom or standard frequencies.
♦ Applications include mobile phones, PHS, GPS, instrumentation and broadband access.
MERCURY www.mercury-crystal.com
Taiwan: TEL (886)-2-2406-2779, FAX (886)-2-2496-0769, e-mail: [email protected]
U.S.A.: TEL (1)-909-466-0427, FAX (1)-909-466-0762, e-mail: [email protected]
MERCURY
Page 1 of 9
Date: Sept. 15, 2003
Rev. 1
“ T C X O” and “V C T C X O "
Wave Form: Clipped Sine Wave
MERCURY
Since 1973
CLIPPED SINE
Product Summary:
Output Wave Form: Clipped Sine Wave
TCXO
VCTCXO
Available
Frequency Range
M38S
M39S
M14S
M15S
VM38S
VM39S
VM14S
VM15S
9.6 ~ 26 MHz
9.6 ~ 26 MHz
9.6 ~ 26 MHz
9.6 ~ 26 MHz
M8S
VM8S
10.0 ~ 26 MHz
M19S
M48S
M58S
M78S
VM19S
VM48S
VM58S
VM78S
9.6 ~ 26 MHz
1.0 ~ 80 MHz
1.0 ~ 80 MHz
1.0 ~ 80 MHz
M55S
M47S
VM55S
VM47S
9.6 ~ 26 MHz
9.6 ~ 26 MHz
M24S
VM24S
9.6 ~ 26 MHz
M25S
VM25S
9.6 ~ 26 MHz
M28S
VM28S
10.0 ~ 26 MHz
M62S
M42S
M64S
M44S
M57S
M53S
VM62S
VM42S
VM64S
VM44S
VM57S
VM53S
10.0 ~ 26 MHz
10.0 ~ 26 MHz
9.6 ~ 26 MHz
9.6 ~ 26 MHz
10.0 ~ 26 MHz
12.8 ~20 MHz
Package size (mm),
L x W x seated height
Thru-Hole Types
4 pin DIP
11.7 x 18.4 x 7.3
4 pin DIP
11.7 x 18.3 x 4.7
4 pin DIP. Hermetically sealed. 12.8 x 20.2 x 8.3
4 pin DIP. With trimmer
12.8 x 20.2 x 8.3
4 pin DIP. Half size. Herme12.8 x 12.8 x 8.3
tically sealed. No trimmer
5 pin DIP
19.8 x 19.8 x 10.0
4 pin DIP
24.1 x 24.1 x 7.5
5 pin DIP
24.1 x 24.1 x 7.5
4 pin DIP
24.1 x 24.1 x 7.5
Gull Wing Surface Mount Types
4 pin gull wing
11.7 x 21.3 x 6.6
4 pin gull wing
11.7 x 21.3 x 4.7
4 pin gull wing. Hermetically
12.8 x 20.2 x 9.3
sealed.
4 pin gull wing. With trimmer
12.8 x 20.2 x 9.3
4 pin gull wing. Half size. Her12.8 x 12.8 x 9.3
metically sealed. No trimmer.
Leadless Surface Mount Types
6 pad FR4 base. 2.5 mm H
9.6 x 11.4 x 2.5
4 pad FR4 base. 2.5mm H
9.6 x 11.4 x 2.5
6 pad FR4 base. 4.7 mm H
9.6 x 11.4 x 4.7
4 pad FR4 base. 4.7 mm H
9.6 x 11.4 x 4.7
4 pad ceramic base
5.0 x 7.5 x 1.9
4 pad ceramic base
5.0 x 3.2 x 1.5
Package size (inches),
L x W x seated height
[0.460 x 0.724 x 0.287]
[0.460 x 0.724 x 0.185]
[0.504 x 0.795 x 0.327]
[0.504 x 0.795 x 0.327]
[0.504 x 0.504 x 0.327]
[0.780 x 0.780 x 0.394]
[0.949 x 0.949 x 0.295]
[0.949 x 0.949 x 0.295]
[0.949 x 0.949 x 0.295]
[0.460 x 0.839 x 0.260]
[0.460 x 0.839 x 0.185]
[0.504 x 0.795 x 0.366]
[0.504 x 0.795 x 0.366]
[0.504 x 0.504 x 0.366]
[0.378 x 0.449 x 0.098]
[0.378 x 0.449 x 0.098]
[0.378 x 0.449 x 0.185]
[0.378 x 0.449 x 0.185]
[0.197 x 0.295 x 0.075]
[0.197 x 0.126 x 0.059]
Note: Frequency tuning by the built-in mechanical trimmer (variable capacitor) is standard for all models
except for models M8S, VM8S, M57S, VM57S, M53S and VM53S. Please specify when ordering if trimmer is
not required.
Note: Because cleaning agent normally degrades the trimmer in the non-hermetically sealed packages,
cleaning through washing cycles is not recommended. If cleaning is mandatory please choose hermetically
sealed packages or no-trimmer option.
MERCURY
Page 2 of 9
Date: Sept. 15, 2003
Rev. 1
“ T C X O” and “V C T C X O”
Wave Form: Clipped Sine Wave
MERCURY
Since 1973
General Specifications (at+25°C and specified input voltage)
Frequency Range
Output Wave From
Initial Calibration Tolerance
Standard Frequencies (partial list)
Frequency Stability
vs Temperature
vs Aging
vs Voltage Change
vs Load Change
vs reflow (SMD models only)
Typical Operating Temperature
Range (examples)
Mechanical Frequency Tuning
Start-Up Time.
(reach 90% amplitude and at+25°C±2°C)
9.6 MHz ~ 26.0 MHz
Clipped Sine wave. Wave form code is “S”
Models with mechanical trimmer: Adjustable to the nominal frequency
Models without mechanical trimmer: ±3 ppm at +25°C
9.6, 10.0, 12.8, 13.0, 14.4, 15.36, 16.384, 19.2, 19.440, 19.68 MHz
±1 ppm , ±1.5 ppm, ±2.0 ppm, ±2.5 ppm, ±3 ppm, ±5 ppm,
over specified operating temperature range
±1.0 ppm max. first year at +25°C
±0.3 ppm max. for a ±5% input voltage change
±0.3 ppm max. for a ±10% loading condition change
±1 ppm max. 1 reflow and measured 24 hours afterwards
0°C to +60°C
0°C to +70°C
-10°C to +60°C
-20 °C to +70°C
-30°C to +60°C
-30°C to +75°C
-40°C to +85°C (not available on all frequency stability listed above)
±3 ppm min. (from built-in trimming capacitor)
2 m. sec. Typical, 3 m. sec. max.
Supply Voltage (VDD)
+3.0 V (voltage code is “3”)
Output Voltage Level
0.8 V p-p min.
1.0 V p-p min.
9.6~13 MHz: 1.3 mA max.
9.6~13 MHz: 2.0 mA max.
13.1~20 MHz: 1.5 mA max.
13.1~20 MHz: 2.2 mA max.
20.1~26 MHz: 2.0 mA max.
20.1~26 MHz: 2.5 mA max.
±5~±12 ppm for +1.5 V±1.0 V
±6~±12 ppm for +2.5 V ±2.0 V
(up to ±100 ppm is also available
(up to ±100 ppm is also available for
for some of the packages)
some of the packages)
Positive: Increase control voltage increases output frequency.
Negative slope is also available
10 % max.
10 K Ω // 15 pF
M57, M53, VM57, VM53: -10 dB typ. –7 dB max.
Other models:-12 dB typ. –9 dB max.
DC block, AC coupled
-40°C to +85°C
VCTCXO
only
Current Consumption
Electrical Frequency Tuning
(from voltage control pin)
Slope Polarity
Linearity
Output Load
Harmonics Distortion
Output Format
Storage Temperature
+5.0 V (voltage code is “5”)
Note 1: Depends on specific frequency, operating temperature range and package style, specifications may vary from model
to model. Please contact Mercury if spec. sheet of a particular model is required.
Note 2: TCXO products ordered without mechanical and electrical frequency tuning should have a frequency tolerance of ±3
ppm (at +25°C) and the frequency stability over temperature will be from that measured value.
MERCURY
Page 3 of 9
Date: Sept. 15, 2003
Rev. 1
“ T C X O” and “V C T C X O”
Wave Form: Clipped Sine Wave
Wave Form – clipped sine wave
MERCURY
Since 1973
Typical Phase Noise
VM53S3-13.000
dBc/Hz
-80
-90
-100
-110
Ground
-120
-130
-140
-150
10 Hz
1 kHz
100 Hz
offset
Part Number Format and Examples:
Package Code
_ or V
M_ _
“3” for +3.0 V
“5” for +5.0V
S
“ ” Blank for TCXO
“V“ for VCTCXO
Supply
Voltage
M38S5-12.800-1.0/-20+70
Frequency Stability
in ± ppm
Frequency
Wave form code
“S” for clipped sine wave
Stability
Temp.
Range
Nominal frequency
in MHz
Operating temp.
range in °C
represents 12.800 MHz TCXO in M38 package with stability of ±1 ppm
from –20°C to +70°C, clipped sine wave output, +5.0V input voltage.
VM47S3-13.000-2.5/-30+75 represents 13.0 MHz VCTCXO in M47 package with stability of ±2.5 ppm
from –30°C to +75°C, clipped sine wave output, +3.0 V input voltage.
Clipped Sine Wave TCXO (VCTCXO) Test Circuit:
Vcc
14
SUPPLY
VOLTAGE
A
V
1
+
-
Oscilloscope
8
Top view
10K
ohms
15
pF *
Frequency counter
7
* Include all the proble and stray capacitances
0.01
uF
CONTROL
VOLTAGE
MERCURY
Page 4 of 9
10 kHz
Date: Sept. 15, 2003
Rev. 1