Model 520
Temperature Compensated Crystal Oscillator
FEATURES
•
•
•
•
•
•
•
•
•
•
Clipped Sine Wave Output
Optional Voltage Control for Frequency Tuning [VCTCXO]
2.5mmx2.0mm Surface Mount Package
Frequency Range 10 – 52 MHz
[Standard Frequencies List Shown Below]
Fundamental Crystal Design
Frequency Stability, several options to choose from ±0.5ppm ~ ±2.5ppm
Operating Voltage, +1.8Vdc ~ +2.5Vdc
Operating Temperature to -40°C to +85°C
Tape & Reel Packaging Available
RoHS/Green Compliant (6/6)
APPLICATIONS
The Model 520 Temperature Compensated Crystal Oscillator (TCXO) is a quartz
based, clipped sine wave output, with optional frequency tuning, in a hermetically
sealed ceramic package. M520 is suitable for wireless communications, broadband access,
WLAN/WiMax/WIFI, portable equipment, test and measurement and mobile applications.
ORDERING INFORMATION
520
SUPPLY VOLTAGE
M = +1.8Vdc
N = +2.5Vdc
T = +2.8Vdc
R = +3.0Vdc
L = +3.3Vdc
FREQUENCY STABILITY *
05
10
15
20
25
=
=
=
=
=
±
±
±
±
±
0.5 ppm
1
1.0 ppm
2
1.5 ppm
2.0 ppm
2.5 ppm (std)
OPERATING TEMPERATURE RANGE
H = -10°C to +60°C
C = -20°C to +70°C
D = -30°C to +85°C (std)
I = -40°C to +85°C
M
FREQUENCY IN MHz
M - indicates MHz and decimal point.
3
[See table below for standard frequencies available.]
FREQUENCY TUNING (AFC)
T = TCXO (no AFC)
A = ± 5 ppm
4
* Frequency vs. Temperature Only
1] Only available with temperature range codes "H" and "C".
2] Only available with temperature range codes "H", "C" and "D".
3] Frequency is recorded with two leading digits before the ‘M’ and 4 significant digits after the ‘M’ (including zeros).
[Ex. XXMXXXX (10M0000), XXMXXXX (16M3840)]
4] See Electrical Characteristics for Control Voltage range per Supply Voltage selected.
Not all performance combinations and frequencies may be available.
Contact your local CTS Representative or CTS Customer Service for availability.
13.000000
16.367667
M520 Standard Frequencies
16.368000
19.200000
26.000000
16.369000
20.000000
38.400000
40.000000
Document No. 008-0371-0
Page 1 - 4
Rev. C
www.ctscorp.com
TCXO/VCTCXO – Clipped Sine Wave
ELECTRICAL CHARACTERISTICS
PARAMETER
Maximum Supply Voltage
Maximum Control Voltage
Storage Temperature
Frequency Range
Frequency Stability
Frequency Stability
vs. Initial Calibration
vs. Supply Voltage
vs. Load
vs. Reflow Shift
vs. Aging
Operating Temperature
Order Code 'W'
Order Code 'H'
Order Code 'C'
Order Code 'D'
Order Code 'I'
Supply Voltage
Order Code 'M'
Order Code 'N'
Order Code 'T'
Order Code 'R'
Order Code 'L'
Supply Current
Control Voltage
Frequency Tuning
[VCTCXO Only]
V
C
Input Impedance
Output Waveform
Output Voltage Levels
Output Load
Start Up Time
Phase Noise
ELECTRICAL PARAMETERS
SYMBOL
V
CC
V
C
T
STG
f
O
Δf/f
O
CONDITIONS
-
-
-
Std frequencies listed in Ordering Information
Model 520
MIN
-0.5
-0.5
-40
10
TYP
-
-
-
MAX
6.0
V
CC
85
UNIT
V
V
°C
MHz
± ppm
Frequency vs. Temperature Only
@25°C
±5% change
±10% change
After 2 reflows
1st year
10 year
-
-
-
-
-
-
0
-10
-20
-30
-40
1.77
2.38
2.66
2.85
3.14
-
-
0.4
0.3
5.0
500
-
52
0.5, 1.0, 1.5
2.0, 2.5
-
-
-
-
-
-
2.0
0.2
0.2
2.0
1.0
10.0
55
60
70
85
85
1.83
2.63
2.94
3.15
3.47
2
2.5
2.4
1.5
-
-
-
± ppm
T
A
-
25
°C
V
CC
±5%
I
CC
V
C
-
ZV
C
V
O
R
L
// C
L
T
S
-
10.00 MHz - 25.99 MHz
26.00 MHz - 52.00 MHz
2.5V, 2.8V, 3.0V, 3.3V
1.8V
Specified V
C
Range
-
AC coupled Clipped Sinewave
-
-
1.8
2.5
2.8
3.0
3.3
-
-
1.5
0.9
-
-
V
mA
V
± ppm
kOhm
Vp-p
ms
dBc/Hz
0.8
-
-
10 kOhm // 10 pF
-
-
2
Varies based on output frequency. See example plot @ 19.2 MHz below.
Document No. 008-0371-0
Page 2 - 4
Rev. C
TCXO/VCTCXO – Clipped Sine Wave
ELECTRICAL CHARACTERISTICS
D.U.T. PIN ASSIGNMENTS
PIN
1
2
3
4
SYMBOL
V
C
GND
Output
V
CC
DESCRIPTION
GND – TCXO
[Note 1]
Control Voltage – VCTCXO
Circuit & Package Ground
Clipped Sine Wave Output
[Note 2]
Supply Voltage
TEST CIRCUIT – RL//CL LOAD
Model 520
NOTES
1. Connect to ground for TCXO (no AFC) option.
2. DC-Cut Capacitor Required.
Add 1000pF capacitor between TCXO output and input of load.
* DC-Cut Capacitor
MECHANICAL SPECIFICATIONS
PACKAGE DRAWING
MARKING INFORMATION
1. M520 - CTS Model Series.
2.
●
– Pin 1 identifier.
3. D – Date code. See Table I for
codes.
4. XXX – Frequency code. Reference
CTS document 016-1454-01.
Complete CTS part number, frequency
value and date code information must
appear on reel and carton labels.
NOTES
1. DO NOT make connections to non-
labeled pins and castellations, as
they may have internal connections
used in the manufacturing process.
2. Termination pads (e4); barrier
plating is nickel (Ni) with gold (Au)
flash plate.
3. Reflow conditions per JEDEC J-
STD-020, 260°C maximum.
M520
●
DXXX
SUGGESTED SOLDER PAD GEOMETRY
C
BYPASS
should be
≥
0.01 uF.
TABLE I – DATE CODE
MONTH
YEAR
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
JAN
A
N
a
n
FEB
B
P
b
p
MAR
C
Q
c
q
APR
D
R
d
r
MAY
E
S
e
s
JUN
F
T
f
t
JUL
G
U
g
u
AUG
H
V
h
v
SEP
J
W
j
w
OCT
K
X
k
x
NOV
L
Y
l
y
DEC
M
Z
m
z
Document No. 008-0371-0
Page 3 - 4
Rev. C
Switching Power Supply Study Group
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