Document No. 008-0371-0 Page 1 - 4 Rev. C
www.ctscorp.com
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
3] Frequency is recorded with two leading digits before the ‘M’ and 4 significant digits after the ‘M’ (including zeros).
1] Only available with temperature range codes "H" and "C".
Not all performance combinations and freque ncies may be a va ilable .
M = +1.8Vdc
N = +2.5Vdc
T
= +2.8Vdc
R = +3.0Vdc
L = +3.3Vdc
Contact your local CTS Representative or CTS Customer Service for availability.
T
= TCXO (no AFC)
A = ± 5 ppm 4
2] Only available with temperature range codes "H", "C" and "D".
[Ex. XXMXXXX (10M0000), XXMXXXX (16M3840)]
4] See Electrical Characteristics for Control Voltage range per Supply Voltage selected.
FREQUENCY STABILITY *
05 = ± 0.5 ppm 1
10 = ± 1.0 ppm 2
15 = ± 1.5 ppm
20 = ± 2.0 ppm
25 = ± 2.5 ppm (std)
OPERATING TEMPERAT UR E RANG E
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
* Frequency vs. Temperature Only
SUPPLY VOLTAGE FREQUENCY IN MHz
M - indicates MHz and decimal point. 3
[See table below for standard frequencies available.]
FREQUENCY T UNING (AFC)
M
520
13.000000 16.368000 19.200000 26.000000 40.000000
16.367667 16.369000 20.000000 38.400000
M520 Standard Freque ncies
Document No. 008-0371-0 Page 2 - 4 Rev. C
Model 520
TCXO/VCTCXO – Clipped Sine Wave
ELECTRICAL CHARACTERISTICS
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT
Maximum Supply Voltage VCC - -0.5 - 6.0 V
Maximum Control Voltage VC--0.5-
VCC V
Storage Temperature TSTG --40-85°C
Frequency Range fO Std frequencies listed in Ordering Information 10 - 52 MHz
Frequency Stability Δf/fO Frequency vs. Temperature Only ± ppm
Fre
q
uenc
y
Stabilit
y
vs. Initial Calibration @25°C --2.0
vs. Su
pp
l
y
Volta
g
e±5% chan
g
e--0.2
vs. Load ±10% chan
g
e--0.2
vs. Reflow Shif
t
After 2 reflows --2.0
1st
y
ear --1.0
10
ear - - 10.0
O
p
eratin
g
Tem
p
erature
Order Code 'W' 055
Order Code 'H' -10 60
Order Code 'C' -20 70
Order Code 'D' -30 85
Order Code 'I' -40 85
Su
pp
l
y
Volta
g
e
Order Code 'M' 1.77 1.8 1.83
Order Code 'N' 2.38 2.5 2.63
Order Code 'T' ±5% 2.66 2.8 2.94
Order Code 'R' 2.85 3.0 3.15
Order Code 'L' 3.14 3.3 3.47
Su
pp
l
y
Curren
t
10.00 MHz - 25.99 MHz - - 2
26.00 MHz - 52.00 MHz - - 2.5
Control Volta
g
e2.5V, 2.8V, 3.0V, 3.3V 0.4 1.5 2.4
1.8V 0.3 0.9 1.5
Frequency Tuning [VCTCXO Only] - Specified VC Range 5.0 - - ± ppm
VC Input Impedance ZVC- 500 - - kOhm
Out
p
ut Waveform AC cou
p
led Cli
pp
ed Sinewave
Output Voltage Levels VO0.8 - - Vp-p
Output Load RL // CL-
Start Up Time TS---2ms
Phase Noise - dBc/Hz
25
VCV
V
ICC mA
10 kOhm // 10 pF
ELECTRICAL PARAMETERS
0.5, 1.0, 1.5
2.0, 2.5
-± ppm
vs. Aging
TA-°C
VCC
Varies based on output frequency. See example plot @ 19.2 MHz below.
Document No. 008-0371-0 Page 3 - 4 Rev. C
Model 520
TCXO/VCTCXO – Clipped Sine Wave
ELECTRICAL CHARACTERISTICS
MECHANICAL SPECIFICATIONS
TEST CIRCUIT – RL//CL LOAD
* DC-Cut Capacitor
D.U.T. PIN ASSIGNMENTS
PIN SYMBOL DESCRIPTION
GND – TCXO [Note 1]
1 VC Control Voltage – VCTCXO
2 GND Circuit & Package Ground
3 Output Clipped Sine Wave Output [Note 2]
4 VCC Supply Voltage
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.
TABLE I – DATE CODE
2001 2005 2009 2013 2017 A B C D E F G H J K L M
2002 2006 2010 2014 2018 N P Q R S T U V W X Y Z
2003 2007 2011 2015 2019 a b c d e f g h j k l m
2004 2008 2012 2016 2020 n p q r s t u v w x y z
MONTH JAN FEB MAR DEC
YEAR AUG SEP OCT NOVAPR MAY JUN JUL
PACKAGE DRAWING
M520
● DXXX
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.
SUGGESTED SOLDER PAD GEOMETRY
CBYPASS should be ≥ 0.01 uF.
Document No. 008-0371-0 Page 4 - 4 Rev. C
Model 520
TCXO/VCTCXO – Clipped Sine Wave
PACKAGING INFORM ATION [Reference]
Device quantity is 1k pieces minimum and 3k maximum per 180mm reel.
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
CTS:
520R25HT40M0000 520L25HT16M3680 520T20IA16M3690 520M25IA38M4000 520M25IA40M0000
520N25IA26M0000 520R25IA13M0000 520R25IA16M3677 520L25IA16M3680 520L25IA16M3690
520T15DA13M0000 520T20DA13M0000 520T25DA26M0000 520R25DA26M0000 520T15CA40M0000
520L20CA13M0000 520T25CA19M2000 520T05HA13M0000 520L05HA26M0000 520R25HA13M0000
520M25HT16M3677 520N15IA16M3690 520L10DA16M3677 520T20DA16M3677 520R20DA16M3680
520T25DA19M2000 520R25DA40M0000 520L25DA26M0000 520L05CA38M4000 520M15CA16M3680
520M20CA13M0000 520T20CA20M0000 520R20CA40M0000 520L20CA16M3690 520N25CA16M3680
520N10HA16M3677 520R10HA16M3680 520N15HA40M0000 520M20HA16M3680 520R20HA13M0000
520L25HA19M2000 520R20IT19M2000 520L20IT13M0000 520M25IT16M3690 520N25IT13M0000
520T25IT16M3680 520M10DT38M4000 520R10DT26M0000 520M15DT16M3677 520L15DT26M0000
520L20DT16M3680 520L20DT20M0000 520N25DT16M3677 520R25DT38M4000 520M05CT16M3680
520M10CT16M3690 520T10CT16M3690 520L10CT40M0000 520M15CT20M0000 520N20CT38M4000
520L20CT16M3690 520R05HT16M3690 520N10HT16M3680 520L15HT16M3680 520M20HT26M0000
520R20HT19M2000 520N25HT16M3677 520N25HT38M4000 520L15IT16M3690 520L15IT20M0000
520R20IT40M0000 520R25IT16M3680 520N10DT20M0000 520R10DT20M0000 520L10DT26M0000
520N15DT19M2000 520M20DT40M0000 520L20DT16M3690 520L20DT40M0000 520M25DT13M0000
520L25DT26M0000 520T05CT13M0000 520L05CT19M2000 520M10CT16M3677 520N10CT16M3677
520L15CT38M4000 520L20CT16M3677 520T05HT20M0000 520T10HT40M0000 520R10HT38M4000
520N15HT13M0000 520N15HT38M4000 520T15HT16M3680 520L15HT13M0000 520L15HT16M3690
520L15HT19M2000 520T20HT20M0000 520M25HT16M3680 520M25HT16M3690 520N25HT16M3680