Temperature Compensated Crystal Oscillators (TCXO’s)
TC-140 (R Series) Description:
The TC-140 series offers performance for short-term stabili-
ty, phase noise, aging and temperature stability normally
only associated with Oven Controlled Crystal Oscillators,
while consuming typically <20 mA.
Features:
• Stratum 3 option
• Frequency from 0.5 to 160 MHz
• “1 ppm Forever” option
• TTL, HCMOS and Sinewave
• Over 600,000 units produced
Performance Characteristics
Standard Frequencies: 4.096, 10.00, 12.80, 13.00, 16.384, 19.44, 20.00, 20.48 MHz
Available from 0.5 MHz to 160 MHz
Supply Voltage (Vdd): 12.0 Vdc ±5%
(other options are available upon request) 5.0 Vdc ±5%
Current: Current draw will vary greatly depending on frequency and output type.
For this series TCXO typical current draw will be about 20 mA. Please
consult the factory about your exact current requirements.
Output: A= HCMOS / ACMOS 0.5 to 160 MHz
B= 10 TTL 0.5 to 160 MHz
G= 0 dBm to +6 dBm 3.0 to 100 MHz
J= +7 dBm to +13 dBm 3.0 to 100 MHz (+12 Vdc only)
Temperature Stability: B-1PM - ±1.0 x 10-6 over 0°C to +50°C, 10 years and initial accuracy
Note: Not all stabilities are available B-207 - ±2.0 x 10-7 over 0°C to +50°C, Aging <2 ppm/10 years
with all frequency/output combinations. B-ST3 - Stratum 3 over 0°C to +50°C, *See note below
Please consult the factory. B-4PM - ±4.6 x 10-6 over 0°C to +50°C, 10 years and initial accuracy
C-1PM - ±1.0 x 10-6 over 0°C to +70°C, 10 years and initial accuracy
C-ST3 - Stratum 3 over 0°C to +70°C, *See note below
C-507 - ±5.0 x 10-7 over 0°C to +70°C, Aging <2 ppm/10 years
C-4PM - ±4.6 x 10-6 over 0°C to +70°C, 10 years and initial accuracy
F-106 - ±1.0 x 10-6 over -40°C to +85°C, Aging <2 ppm/10 years
F-4PM - ±4.6 x 10-6 over -40°C to +85°C, 10 years and initial accuracy
*STRATUM 3 per GR-1244-CORE Table 3-1
Total Stability: <±4.6 x 10-6 for all causes and 10 years
Total Stability: <±3.7 x 10-7 for all causes and 24 hours
Note: Tighter stabilities and wider temperature ranges are available, please
consult the factory.
Phase Noise (Typical): Offset Phase Noise
10 MHz 10 Hz -110 dBc/Hz
+12 Vdc 100 Hz -135 dBc/Hz
J - Output 1 kHz -150 dBc/Hz
10 kHz -155 dBc/Hz
Frequency vs. Supply: <±0.05 ppm for a ±5% change in supply voltage
Package: 38.89 x 38.89 x 13.462 mm (1.53” x 1.53” x 0.53”)
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • Web: www.vectron.com
Parameter Characteristics
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Temperature Compensated Crystal Oscillators (TCXO’s)
TC-140 (R Series)
Outline Drawing
Output Option A B
Output HCMOS/ACMOS 10 TTL
Voh min.. 0.8 (Vdd) +2.4 Vdc
Vol max. +0.5 Vdc +0.5 Vdc
Load (typical) 100 k ohm // 10 pF 10 TTL
Symmetry 50% ±10% 50% ±10%
Rise/Fall Time 5 ns max. 10 ns max.
Output Option G J
Output Sinewave Sinewave
Level 0 dBm to +6 dBm +7 dBm to +13 dBm
Load 50 ohm 50 ohm
Harmonics/subs -20 dBc max. -20 dBc max.
Other Spurious -60 dBc max. -80 dBc max.
Pin Function
1 Output
2 Supply (Vdd)
3 Gnd
4 Freq. Adjust/NC
5 Gnd
A ±3 ppm minimum via internal mechanical adjust
positive slope.
B ±3 ppm minimum via external voltage, 0 to +5 Vdc
F No Frequency Adjust. Standard option for ±1 ppm
and ±4.6 ppm for 10 years units. However, this
option is available with all Stability options. No user
adjustment is needed. Unit is Plug-N-Play.
Note: This option is ideal for high volume applica-
tions where minimal set-up and testing is desired.
TC
Output Frequency
0.5 MHz to 160 MHz
140 AC B F
4PM 12.80
Product Family
TC = TCXO
Package
140 = package
Supply Voltage
B = 12 Vdc ±5%
C = 5.0 Vdc ±5%
Output
A= HCMOS/ACMOS
B= 10 TTL
G= 0 dBm / 50 ohm
J= +7 dBm / 50 ohm
MHz
Frequency Adjust Options
A= Internal Mech. Adjust (standard)
B= External Voltage Adjust
F= No Frequency adjust (see above)
Ordering Information
Temperature Stability
B-1PM = ±1.0 x 10-6 over 0°C to +50°C, 10 years (no freq. adjust)
B-207 = ±2.0 x 10-7 over 0°C to +50°C
B-ST3 = Stratum 3 over 0°C to +50°C
B-4PM = ±4.6 x 10-6 over 0°C to +50°C, 10 years (no freq. adjust)
C-1PM = ±1.0 x 10-6 over 0°C to +70°C, 10 years (no freq. adjust)
C-ST3 = Stratum 3 over 0°C to +70°C
C-507 = ±5.0 x 10-7 over 0°C to +70°C
C-4PM = ±4.6 x 10-6 over 0°C to +70°C, 10 years (no freq. adjust)
F-106 = ±1.0 x 10-6 over -40°C to +85°C
F-4PM = ±4.6 x 10-6 over -40°C to +85°C, 10 years (no freq. adjust)
Note: Other stabilities are available upon request.
Frequency Adjust Options
Pin Out Information Output Levels Sine
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • Web: www.vectron.com
.508
(0.20)
1.270
(0.05)
Frequency Adjust
Access. For Mechanical
Adjust Units only.
5.842
(0.23) min
38.887
(1.531) max
13.462
(0.53)
.508
(0.02)
max
0.762
(.030) DIA. 5 PLACES
2.54
(0.10)
C
L
38.887
(1.531)
25.4
(1.000)
12.70
(0.500)
25.4
(1.000)
12.70
(0.500)
34
21
10.160
(0.400)
6.350
(0.250)
5
20.320
(0.800)
max
C
L
mm!
(in)
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TCXO
8798_AA's Vectron 05/30/02 3:11 PM Page 61
