©2010-2014 by Murata Electronics N.A., Inc.
RO3101 (R) 3/31/14 Page 1 of 2
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Electrical Characteristics
Characteristic Sym Notes Minimum Typical Maximum Units
Center Frequency (+25 °C) Absolute Frequency f
C
2, 3, 4, 5
433.845 433.995 MHz
Tolerance from 433.920 MHz f
C
±75 kHz
Insertion Loss IL
2, 5, 6
1.5 2.0
dB
Quality Factor Unloaded Q Q
U
5, 6, 7
7400
50 Loaded Q Q
L
900
Temperature Stability Turnover Temperature T
O
6, 7, 8
10 25 40 °C
Turnover Frequency f
O
f
c
+ 2.7
kHz
Frequency Temperature Coefficient FTC 0.037
ppm/°C
2
Frequency Aging Absolute Value during the First Year |f
A
|
1
10 ppm/yr
DC Insulation Resistance between Any Two Pins 5 1.0 M
RF Equivalent RLC Model Motional Resistance R
M
5, 7, 9
13.7
Motional Inductance L
M
37.1 µH
Motional Capacitance C
M
3.6
fF
Pin 1 to Pin 2 Static Capacitance C
O
5, 6, 9 2.7 pF
Transducer Static Capacitance C
P
5, 6, 7, 9 2.5 pF
Test Fixture Shunt Inductance L
TEST
2, 7 50.0
nH
Lid Symbolization (in Addition to Lot and/or Date Codes) RFM RO3101
TO39-3 Case
• Ideal for 433.92 MHz Transmitters
• Very Low Series Resistance
• Quartz Stability
• Rugged, Hermetic, Low-Profile TO39 Case
• Complies with Directive 2002/95/EC (RoHS)
The RO3101 is a true one-port, surface-acoustic-wave (SAW) resonator in a low-profile TO39 case. It
provides reliable, fundamental-mode, quartz frequency stabilization of fixed-frequency transmitters operating
at 433.92 MHz. The RO3101 is designed specifically for remote-control and wireless security transmitters
operating in Europe under ETSI I-ETS 300 220 and in Germany under FTZ 17 TR 2100.
Absolute Maximum Ratings
Rating Value Units
CW RF Power Dissipation
+0 dBm
DC Voltage Between Any Two Pins
±30 VDC
Case Temperature -40 to +85 °C
Soldering Temperature (10 seconds / 5 cycles Max.) 260 °C
433.92 MHz
SAW
Resonator
RO3101
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
NOTES:
1. Frequency aging is the change in f
C
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 significantly in subsequent years.
2. The center frequency, f
C
, is measured at the minimum insertion loss point,
IL
MIN
, with the resonator in the 50 test system (VSWR 1.2:1). The
shunt inductance, L
TEST
, is tuned for parallel resonance with C
O
at f
C
.
Typically, f
OSCILLATOR
or f
TRANSMITTER
is less than the resonator f
C
.
3. One or more of the following United States patents apply: 4,454,488 and
4,616,197 and others pending.
4. Typically, equipment designs utilizing this device require emissions testing
and government approval, which is the responsibility of the equipment
manufacturer.
5. Unless noted otherwise, case temperature T
C
= +25°C±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: f
C
, IL, 3 dB bandwidth, f
C
versus T
C
, and C
O
.
8. Turnover temperature, T
O
, is the temperature of maximum (or turnover)
frequency, f
O
. The nominal frequency at any case temperature, T
C
, may be
calculated from: f = f
O
[1 - FTC (T
O
-T
C
)
2
]. Typically, oscillator T
O
is 20°C
less than the specified resonator T
O
.
9. This equivalent RLC model approximates resonator performance near the
resonant frequency and is provided for reference only. The capacitance C
O
is the static (nonmotional) capacitance between pin1 and pin 2 measured
at low frequency (10 MHz) with a capacitance meter. The measurement
includes case parasitic capacitance with a floating case. For usual
grounded case applications (with ground connected to either pin 1 or pin 2
and to the case), add approximately 0.25 pF to C
O
.
Pb
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