Rev. X01
Preliminary Specification
CTS
♦
Frequency Stability to Stratum 3 of GR-1244
♦
Patented Voltage Tuned Thermistor Network
♦
Very Low Phase Jitter: < 1 pSec
♦
+3.3Vdc or +5.0Vdc Operation
♦
Precision Low Aging “
AT” Cut Crystal
♦
Compatible with Semtech SETS Chipsets
♦
Surface Mount Pkg. – Matches Vectron Z5
Model 546
“VTTN™ ” Series
Stratum 3 TCXO
Electrical Characteristics
Parameter
Power
Requirements
Power Supply
Supply Current
Frequency
Stabilities
Center Frequency
Sym
Vcc
Icc
Conditions
±
5%
546L
±
5%
546S
Vcc=Max. (3.3Vdc)
Std. Load (5.0Vdc)
Min
3.135
4.75
Typical
3.30
5.0
12
15
Max
3.465
5.25
Note 1
Unit
Vdc
Vdc
mA
mA
f
nom
1.25
Initial Tolerance
Freq. vs. Temp.
Freq. vs. Voltage
Freq. vs Time
(Aging)
24 Hour Holdover
Stability
Total Free-
Running Accuracy
Waveform:
CMOS Output
Symmetry
Amplitude
Rise/Fall Times
Load
Phase Noise
f
cal
∆f/∆Temp
Ta=+25°C
38.88
20
19.44
12.8
10
±
0.75
±
0.25
38.88
MHz
ppm
ppm
ppm
ppm
±
0.37
±
4.6
ppm
∆f/∆Vcc
∆f/∆Time
∆f/24Hr
∆f/Life
Vcc
±
5%
20 years
Inclusive of Temp.,
Supply Variation
and 24Hrs. Aging
All Cond. for 20
Yrs. (Ref. to f
nom
)
±
0.1
±
2.5
±
0.30
ppm
Sym
Vo
tr, tf
RL
Pn
@ 50% Level
Logic “
1”
Logic “
0”
20% to 80%
Output to Ground
Offset = 100HZ
1KHz
10KHz
100KHz
12KHz to 20MHz
Bandwidth
40
0.8Vcc
50
60
0.3
6
%
V
V
nSec
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
10KΩ
15pF
-115
-130
-140
-150
1.0
Phase Jitter
pSec RMS
Note 1: Maximum Current will vary with Frequency
Rev. X01
Preliminary Specification
CTS
1.15
Model 546
“VTTN™ ” Series
Stratum 3 TCXO
1.00
0.390 MAX
Pin #
1
2
3
4
5
1.00
Function
RF Output
Supply Voltage
Ground
No Connect
Ground
2
3
1
0.25
5
4
0.40
0.40
Environmental / Mechanical Specifications
Storage Temperature:
Reflow Soldering:
Shock:
Vibration:
Case:
Seal:
-55° to +125°C
30 Sec. > 200°C, 240°C Peak Max.
50 G’ 11 mSec. Pulse (3 Shocks/Axis)
s,
10 G’ peak, 10 to 500 Hz
s
High-Temp FR-4 Base, Nickel/Silver Cover
Non-Hermetic
Ordering Information
Model 546
Supply Voltage
L = +3.3Vdc
S = +5.0Vdc
___.________
Example: 546SA-19.440
Frequency in MHz
Oper. Temp. Range
A = -5° to +50°C
B = 0° to +70°C
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