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, digital temperature compensated oscillator 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. B
www.ctscorp.com
TCXO/VC-TCXO – 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. B
TCXO/VC-TCXO – Clipped Sine Wave
ELECTRICAL CHARACTERISTICS
D.U.T. PIN ASSIGNMENTS
PIN
1
2
3
4
SYMBOL
V
C
GND
Output
V
CC
DESCRIPTION
Control Voltage – VCTCXO [Note 1]
GND - TCXO
Circuit & Package Ground
Clipped Sine Wave Output
Supply Voltage
TEST CIRCUIT – RL//CL LOAD
Model 520
+
mA
-
4
+
POWER
SUPPLY
3
D.U.T.
10K
Ω
10pF
Including probe
capacitance.
+
VM
-
0.01uF
-
1
2
NOTES
1. Connect to ground for TCXO (no AFC) option.
Control Voltage - VC-TCXO
GND - TCXO
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. See Table II
for codes.
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. Castellation pins 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.
4. Required: 1000pF capacitor
between the TCXO output and
input of load.
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. B
TCXO/VC-TCXO – Clipped Sine Wave
MECHANICAL SPECIFICATIONS
TABLE II – FREQUENCY CODING
MARKING
CODE
100
102
120
122
128
130
135
140
144
147
153
160
MARKING
CODE
16A
16E
16B
16C
16D
163
168
180
184
192
194
196
MARKING
CODE
198
199
200
204
210
240
24B
24C
250
260
270
300
MARKING
CODE
307
320
325
327
336
360
384
388
400
500
Model 520
FREQUENCY
FREQUENCY
FREQUENCY
FREQUENCY
10.000 MHz
10.240 MHz
12.000 MHz
12.288 MHz
12.800 MHz
13.000 MHz
13.500 MHz
14.000 MHz
14.400 MHz
14.7456 MHz
15.360 MHz
16.000 MHz
16.367 MHz
16.3676 MHz
16.367667 MHz
16.368 MHz
16.369 MHZ
16.384 MHz
16.800 MHz
18.000 MHz
18.432 MHz
19.200 MHz
19.440 MHz
19.680 MHz
19.800 MHz
19.998 MHz
20.000 MHz
20.480 MHz
21.000 MHz
24.000 MHz
24.5535 MHz
24.576 MHz
25.000 MHz
26.000 MHz
27.000 MHz
30.000 MHz
30.720 MHz
32.000 MHz
32.512 MHz
32.768 MHz
33.600 MHz
36.000 MHz
38.400 MHz
38.880 MHz
40.000 MHz
50.000 MHz
Not all frequencies listed may be available for this design.
PACKAGING INFORMATION
Device quantity is 1,000 pieces minimum per 180mm reel.
Document No. 008-0371-0
Page 4 - 4
Rev. B
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