©2010-2015 by Murata Electronics N.A., Inc.
RO3144E/E-1/E-2 (R) 7/31/15 Page 1 of 2 www.murata.com
Electrical Characteristics
Characteristic Sym Notes Minimum Typical Maximum Units
Frequency, +25 °C RO3144E
fC
2, 3, 4, 5
916.300 916.700
MHzRO3144E-1 916.350 916.650
RO3144E-2 916.400 916.600
Tolerance from 916.5 MHz RO3144E
fC
±200
kHzRO3144E-1 ±150
RO3144E-2 ±100
Insertion Loss IL 2, 5, 6 1.2 1.6 dB
Quality Factor Unloaded Q QU5, 6, 7 6400
50 Loaded Q QL780
Temperature Stability Turnover Temperature TO
6, 7, 8
15 25 40 °C
Turnover Frequency fOfc MHz
Frequency Temperature Coefficient FTC 0.032 ppm/°C2
Frequency Aging Absolute Value during the First Year |fA| 1 10 ppm
DC Insulation Resistance between Any Two Terminals 5 1.0 M
RF Equivalent RLC Model Motional Resistance RM
5, 6, 7, 9
14
Motional Inductance LM15.4 µH
Motional Capacitance CM1.9 fF
Transducer Static Capacitance CO5, 6, 9 1.9 pF
Test Fixture Shunt Inductance LTEST 2, 7 16 nH
Lid Symbolization RO3144E 693, RO3144E-1 769, RO3144E-2 770 / YWWS
Standard Reel Quantity Reel Size 7 Inch 10 500 Pieces / Reel
Reel Size 13 Inch 3000 Pieces / Reel
• Ideal for 916.5 MHz Remote Control and Data Telemetry Transmitters
• Very Low Series Resistance
• Quartz Stability
• Complies with Directive 2002/95/EC (RoHS)
The RO3144E is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount ceramic case.
It provides reliable, fundamental-mode stabilization of fixed-frequency transmitters operating at 916.5 MHz.
This SAW is designed specifically for remote control and data telemetry transmitters operating in the USA
under FCC Part 15 regulations and in Canada under DoC RSS-210.
Absolute Maximum Ratings
Rating Value Units
Input Power Level 0 dBm
DC Voltage 12 VDC
Storage Temperature -40 to +125 °C
Operating Temperature Range -40 to +125 °C
Soldering Temperature 260 °C
916.5 MHz
SAW
Resonator
RO3144E/E-1/E-2
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=f
O[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.
10. Tape and Reel Standard for ANSI / EIA 481.
SM3030-6 Case
3.0 X 3.0
Pb
Copyright © Murata Manufacturing Co., Ltd. All Rights Reserved 2007
©2010-2015 by Murata Electronics N.A., Inc.
RO3144E/E-1/E-2 (R) 7/31/15 Page 2 of 2 www.murata.com
Ref mm Inches
Min Nom Max Min Nom Max
A2.87 3.00 3.13 0.113 0.118 0.123
B2.87 3.00 3.13 0.113 0.118 0.123
C1.12 1.25 1.38 0.044 0.049 0.054
D0.77 0.90 1.03 0.030 0.035 0.040
E2.67 2.80 2.93 0.105 0.110 0.115
F1.47 1.60 1.73 0.058 0.063 0.068
G0.72 0.85 0.98 0.028 0.033 0.038
H1.37 1.50 1.63 0.054 0.059 0.064
I0.47 0.60 0.73 0.019 0.024 0.029
J1.17 1.30 1.43 0.046 0.051 0.056
K3.20 0.126
L1.70 0.067
M1.05 0.041
N0.81 0.032
O0.38 0.015
Pin Connection
1NC
2Terminal
3NC
4NC
5Terminal
6NC
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.
1
2
3
6
5
4
1
2
3
6
5
4
A
BC
DJ
EF
GH
I
K
K
O
MM
N
N
N
L
Case and Typical PCB Land Dimensions
-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 accounts for resonator contribution only and does not
include external LC component temperature effects.
Characterization Test Circuit
Inductor LTEST is tuned to resonate with the static capacitance, CO, at FC.
+VDC
ROXXXXC
Bottom View
200k
C1
L1
+VDC
C2
RF Bypass
Typical Local Oscillator Application Output
2 3
6 5 4
1
Modulation
Input
ROXXXXC
Bottom View
200k
C1
L1
(Antenna)
47
+9VDC
C2
RF Bypass
470
Typical Low-Power Transmitter Application
2 3
6 5 4
1
Example Application Circuits
Low-Loss
Matching
Network to
50
50 Source
at F C
PINCIDENT
PREFLECTED
2 3
6 5 4
1
Power Dissipation Test
Copyright © Murata Manufacturing Co., Ltd. All Rights Reserved 2007