Model 345
Features
HFF LVPECL VCXO
Ceramic Surface Mount Package
Ultra-Low Phase Jitter Performance
High Frequency Fundamental Crystal Design
Frequency Range 100 – 250MHz *
+3.3V Operation
Output Enable Standard
Tape and Reel Packaging, EIA-418
Small Cells
Wireless Communication
Broadband Access
SONET/SDH/DWDM
Base Stations
Ethernet/GbE/SyncE
Digital Video
Test and Measurement
Part Dimensions:
5.0 × 3.2 × 1.2mm
•
62.28mg
Applications
Standard Frequencies
- 100.00MHz
- 122.88MHz
- 125.00MHz
- 153.60MHz
- 155.52MHz
- 156.25MHz
- 160.00MHz
- 166.00MHz
- 200.00MHz
- 204.80MHz
- 240.00MHz
- 245.76MHz
* Check factory for availability of frequencies not listed.
Description
CTS Model 345 is a low cost, small size, high performance VCXO. Employing the latest IC technology, coupled
with a high frequency fundamental crystal, M345 has excellent stability and low jitter/phase noise performance.
Ordering Information
Model
345
Supply
Voltage
L
Absolute
Pull Range
B
Frequency
Stability
3
Temperature
Range
I
Frequency Code
[MHz]
Packaging
T
XXX or XXXX
Voltage
Code
L
+3.3V ±5%
Code
5
4
3
Stability
±25ppm
±30ppm
±50ppm
1
Code
Frequency
Product Frequency Code
2
Code
B
APR
±50ppm
3
Code Temp. Range
C
-20°C to +70°C
-40°C to +85°C
I
Code
T
Packing
1k pcs./reel
Notes:
1] Check factory availability with "I" temperature range.
2] Refer to document 016-1454-0, Frequency Code Tables. 3-digits for frequencies <100MHz, 4-digits for frequencies 100MHz or greater.
3]
Frequencies ≥200MHz, APR is ±30ppm.
Not all performance combinations and frequencies may be available.
Contact your local CTS Representative or CTS Customer Service for availability.
This product is specified for use only in standard commercial applications. Supplier disclaims all express and implied warranties
and liability in connection with any use of this product in any non-commercial applications or in any application that
may expose the product to conditions that are outside of the tolerances provided in its specification.
DOC# 008-0553-0 Rev. D
Page 1 of 7
©2017 CTS® Corporation. Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
HFF LVPECL VCXO
Model 345
Electrical Specifications
Operating Conditions
P ARAMETER
Maximum Supply Voltage
Maximum Control Voltage
Supply Voltage
Supply Current
O utput Load
O perating Temperature
Storage Temperature
SYMBO L
V
CC
V
C
V
CC
I
CC
R
L
T
A
T
STG
CO NDITIO NS
-
-
±5%
Typical @ LVPECL Load, T
A
= +25°C
Terminated to V
CC
- 2.0V
-
-
MIN
-0.3
-0.5
3.14
-
-
-20
-40
-40
TYP
-
-
3.3
65
50
+25
-
MAX
5.0
V
CC
3.47
80
-
+70
+85
+100
UNIT
V
V
V
mA
Ohms
°C
°C
Frequency Stability
P ARAMETER
Frequenc y Range
Frequenc y Stability
[Note 1]
SYMBO L
f
O
Δf/f
O
APR
APR
Δf/f
25
CO NDITIO NS
-
±25ppm stability, -20°C to +70°C only
Frequencies <200MHz
Frequencies ≥200MHz
First Year @ +25°C, nominal V
CC
and V
C
MIN
TYP
100 - 250
25, 30 or 50
MAX
UNIT
MHz
±ppm
Absolute P ull Range
[Note 2]
50
30
-3
-
-
-
-
-
3
±ppm
±ppm
ppm
Aging
1.] Inclusive of initial tolerance at time of shipment, changes in supply voltage, load, temperature and 1st year aging.
2.] Minimum guaranteed frequency shift from f
O
over variations in temperature, aging, power supply and load.
Output Parameters
P ARAMETER
O utput Type
O utput Voltage Levels
O utput Duty Cyc le
Rise and Fall Time
Start Up Time
Enable Func tion
Enable Input Voltage
Disable Input Voltage
Standby Current
Enable Time
P hase Jitter, RMS
P hase Noise
V
IH
V
IL
I
STB
T
PLZ
tjrms
-
Pin 2 Logic '1', Output Enabled
Pin 2 Logic '0', Output Disabled
Pin 2 Logic '0', Output Standby
Pin 2 Logic '1'
Bandwidth 12kHz - 20MHz
See Typical Plots
0.7V
CC
-
-
-
-
-
-
-
-
-
90
-
-
0.3V
CC
10
20
200
-
V
V
µA
µs
fs
-
SYMBO L
-
V
OH
V
OL
SYM
T
R
, T
F
T
S
CO NDITIO NS
-
LVPECL Load, -40°C to +85°C
LVPECL Load, -40°C to +85°C
@ V
CC
- 1.3V
@ 20%/80% Levels
Application of V
CC
V
CC
- 1.085
V
CC
- 1.810
45
-
-
MIN
TYP
LVPECL
-
-
-
0.3
5
V
CC
- 0.880
V
CC
- 1.620
55
1.0
10
MAX
UNIT
-
V
%
ns
ms
Enable Truth Table
Pin 2
Logic ‘1’
Open
Logic ‘0’
Pin 4 & 5
Output
Output
High Imp.
DOC# 008-0553-0 Rev. D
Page 2 of 7
©2017 CTS® Corporation. Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
HFF LVPECL VCXO
Model 345
Electrical Specifications
Control Voltage
P ARAMETER
Control Voltage
Frequenc y Deviation
Linearity
Gain Transfer
Input Impedanc e
Modulation Roll-off
Transfer Func tion
SYMBO L
V
C
Δf/f
O
L
K
V
Z
Vc
-
-
CO NDITIO NS
-
V
C
= 0.0V
V
C
= 3.3V
Best Straight Line Fit
Pull Sensitivity; @ +1.65V, +25°C
-
@ -3dB
-
-
-
10
25
MIN
0.00
TYP
1.65
-155 to -75
75 to 155
5
75
-
-
Positive
10
-
-
-
MAX
3.30
UNIT
V
ppm
%
ppm/V
MOhms
kHz
-
Test Circuit
LVPECL
Output Waveform
LVPECL
DOC# 008-0553-0 Rev. D
Page 3 of 7
©2017 CTS® Corporation. Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
HFF LVPECL VCXO
Model 345
Electrical Specifications
Performance Data
Frequency Deviation – Over Temperature [typical]
122.88MHz, V
CC
= 3.3V, V
C
= 1.65V
156.25MHz, V
CC
= 3.3V, V
C
= 1.65V
Frequency Deviation – Pulling Range [typical]
122.88MHz, V
CC
= 3.3V, T
A
= +25°V
156.25MHz, V
CC
= 3.3V, T
A
= +25°V
Frequency Deviation – Gain Transfer [typical]
122.88MHz, V
CC
= 3.3V, T
A
= +25°V
156.25MHz, V
CC
= 3.3V, T
A
= +25°V
DOC# 008-0553-0 Rev. D
Page 4 of 7
©2017 CTS® Corporation. Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
HFF LVPECL VCXO
Model 345
Electrical Specifications
Performance Data
Phase Noise [typical]
122.88MHz, V
CC
= 3.3V, V
C
= 1.65V, T
A
= +25°C
156.25MHz, V
CC
= 3.3V, V
C
= 1.65V, T
A
= +25°C
DOC# 008-0553-0 Rev. D
Page 5 of 7
©2017 CTS® Corporation. Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
Test/Measurement
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