©2010-2014 by Murata Electronics N.A., Inc.
RO3112C (R) 4/14/14 Page 1 of 2 www.murata.com
Electrical Characteristics
Characteristic Sym Notes Minimum Typical Maximum Units
Center Frequency +25 °C Absolute Frequency fC2,3,4,5 433.345 433.495 MHz
Tolerance from 433.420 MHz fC±75 kHz
Insertion Loss IL 2,5,6 1.2 1.5 dB
Quality Factor Unloaded Q QU8700
50Loaded Q QL920
Temperature Stability Turnover Temperature TO
6,7,8
10 25 40 °C
Turnover Frequency fOfC
Frequency Temperature Coefficient FTC 0.032 ppm/°C2
Frequency Aging Absolute Value during the First Year |fA|110 ppm/yr
DC Insulation Resistance between Any Two Terminals 5 1.0 M
RF Equivalent RLC Model Motional Resistance RM
5, 7, 9
11.9
Motional Inductance LM37.9 µH
Motional Capacitance CM3.6 fF
Shunt Static Capacitance CO5, 6, 9 3.8 pF
Test Fixture Shunt Inductance LTEST 2, 7 35.4 nH
Lid Symbolization (in addition to Lot and/or Date Codes) 657 // YWWS
Standard Reel Quantity Reel Size 7 Inch 500 Pieces/Reel
Reel Size 13 Inch 3000 Pieces/Reel
• Ideal for European 433.420 MHz Remote Control and Security Transmitters
• Very Low Series Resistance
• Quartz Stability
• Complies with Directive 2002/95/EC (RoHS)
The RO3112C is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount ceramic case.
It provides reliable, fundamental-mode, quartz frequency stabilization of fixed-frequency transmitters
operating at 433.42 MHz. This SAW is designed specifically for use in remote control and wireless security
transmitters operating in Europe under ETSI I-ETS 300 220.
Absolute Maximum Ratings
Rating Value Units
Input Power Level 0 dBm
DC Voltage 12 VDC
Storage Temperature -40 to +85 °C
Soldering Temperature (10 seconds / 5 cycles maximum) 260 °C
433.420 MHz
SAW
Resonator
RO3112C
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
NOTES:
1. Frequency aging is the change in fC with time and is specified at +65 °C or
less. Aging may exceed the specification for prolonged temperatures
above +65 °C. Typically, aging is greatest the first year after manufacture,
decreasing in subsequent years.
2. The center frequency, fC, is measured at the minimum insertion loss point,
ILMIN, with the resonator in the 50 test system (VSWR 1.2:1). The
shunt inductance, LTEST
, is tuned for parallel resonance with CO at fC.
Typically, fOSCILLATOR or fTRANSMITTER is approximately equal to the
resonator fC.
3. One or more of the following United States patents apply: 4,454,488 and
4,616,197.
4. Typically, equipment utilizing this device requires emissions testing and
government approval, which is the responsibility of the equipment
manufacturer.
5. Unless noted otherwise, case temperature TC= +25 ± 2 °C.
6. The design, manufacturing process, and specifications of this device are
subject to change without notice.
7. Derived mathematically from one or more of the following directly
measured parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
8. Turnover temperature, TO, is the temperature of maximum (or turnover)
frequency, fO. The nominal frequency at any case temperature, TC, may be
calculated from: f = fO[1 - FTC (TO-TC)2]. Typically oscillator TO is
approximately equal to the specified resonator TO.
9. This equivalent RLC model approximates resonator performance near the
resonant frequency and is provided for reference only. The capacitance CO
is the static (nonmotional) capacitance between the two terminals
measured at low frequency (10 MHz) with a capacitance meter. The
measurement includes parasitic capacitance with "NC” pads unconnected.
Case parasitic capacitance is approximately 0.05 pF. Transducer parallel
capacitance can by calculated as: CPCO-0.05pF.
SM5050-8 Case
5 X 5
Pb
Copyright © Murata Manufacturing Co., Ltd. All Rights Reserved 2007
©2010-2014 by Murata Electronics N.A., Inc.
RO3112C (R) 4/14/14 Page 2 of 2 www.murata.com
7
6
54
1
2
3
8
From 50
Network Analyzer
To 50
Network Analyzer
A
1
2
3
B
7
6
5
4
C
D7
6
5
4
E
F
G
1
2
3
88
-80 -60 -40 -20 0 +20 +40 +60
0
-50
-100
-150
+80
-200
0
-50
-100
-150
-200
f
C
= f
O
, T
C
= T
O
T = T
C
- T
O
( °C )
(f-foo
)/f(ppm)
0.05 pF*
0.05 pF
Cp
Co+
=
*Case Parasitics
Cp
Rm Lm C m
Equivalent RLC Model
Temperature Characteristics
The curve shown on the right accounts for resonator contribution only and
does not include LC component temperature contributions.
Pin Connection
1NC
2 Terminal
3NC
4NC
5NC
6 Terminal
7NC
8NC
Electrical Connections
The SAW resonator is bidirectional and
may be installed with either orientation.
The two terminals are interchangeable
and unnumbered. The callout NC
indicates no internal connection. The NC
pads assist with mechanical positioning
and stability. External grounding of the NC
pads is recommended to help reduce
parasitic capacitance in the circuit.
7 6 5
4
1 2 3
8
Low-Loss
Matching
Network to
50
50 Source
at F C
PINCIDENT
PREFLECTED
NC NC
NC
NC NC
NC
7 6 5
4
1 2 3
8
Modulation
Input
ROXXXXC
Bottom View
200k
C1
L1
(Antenna)
47
+9VDC
C2
RF Bypass
470
Typical Low-Power Transmitter Application
7 6 5
4
1 2 3
8
+VDC
ROXXXXC
Bottom View
200k
C1
L1
+VDC
C2
RF Bypass
Typical Local Oscillator Application Output
Example Application Circuits
Parameter Test Circuit
Power Test Circuit
Dimension mm Inches
Min Nom Max Min Nom Max
A4.80 5.00 5.20 0.189 0.197 0.205
B4.80 5.00 5.20 0.189 0.197 0.205
C1.30 1.50 1.70 0.050 0.060 0.067
D1.98 2.08 2.18 0.078 0.082 0.086
E1.07 1.17 1.27 0.042 0.046 0.050
F0.50 0.64 0.70 0.020 0.025 0.028
G2.39 2.54 2.69 0.094 0.100 0.106
H1.27 0.050
I0.76 0.030
J1.55 0.061
K2.79 0.110
L0.76 0.030
M2.36 0.093
N1.55 0.061
O2.79 0.110
P2.79 0.110
Q2.79 0.110
Copyright © Murata Manufacturing Co., Ltd. All Rights Reserved 2007
Mouser Electronics
Authorized Distributor
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RO3112C