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RO3144E/E-1/E-2
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Ideal for 916.5 MHz Remote Control and Data Telemetry Transmitters
Very Low Series Resistance
Quartz Stability
Pb
Complies with Directive 2002/95/EC (RoHS)
916.5 MHz
SAW
Resonator
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
0
dBm
Input Power Level
DC Voltage
12
VDC
Storage Temperature
-40 to +125
°C
Operating Temperature Range
-40 to +125
°C
260
°C
Soldering Temperature
Electrical Characteristics
Characteristic
Frequency, +25 °C
Sym
fC
RO3144E-1
RO3144E-2
Tolerance from 916.5 MHz
Notes
RO3144E
2, 3, 4, 5
RO3144E
Minimum
SM3030-6 Case
3.0 X 3.0
Typical
Maximum
916.300
916.700
916.350
916.650
916.400
916.600
±150
RO3144E-2
Temperature Stability
Frequency Aging
IL
Unloaded Q
QU
50 Loaded Q
QL
Turnover Temperature
TO
Turnover Frequency
fO
2, 5, 6
15
FTC
Absolute Value during the First Year
|fA|
1
5
1.6
dB
780
6, 7, 8
Frequency Temperature Coefficient
25
40
°C
fc
MHz
0.032
ppm/°C2
ppm
10
1.0
M
14

15.4
µH
Motional Resistance
RM
Motional Inductance
LM
Motional Capacitance
CM
1.9
fF
Transducer Static Capacitance
CO
5, 6, 9
1.9
pF
LTEST
2, 7
16
nH
Test Fixture Shunt Inductance
5, 6, 7, 9
Lid Symbolization
Standard Reel Quantity
1.2
6400
5, 6, 7
DC Insulation Resistance between Any Two Terminals
RF Equivalent RLC Model
kHz
±100
Insertion Loss
Quality Factor
MHz
±200
fC
RO3144E-1
Units
RO3144E 693, RO3144E-1 769, RO3144E-2 770 / YWWS
Reel Size 7 Inch
10
Reel Size 13 Inch
500 Pieces / Reel
3000 Pieces / Reel
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
NOTES:
1.
2.
3.
4.
5.
6.
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.
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.
One or more of the following United States patents apply: 4,454,488 and 4,616,197.
Typically, equipment utilizing this device requires emissions testing and government
approval, which is the responsibility of the equipment manufacturer.
Unless noted otherwise, case temperature TC = +25 ± 2 °C.
The design, manufacturing process, and specifications of this device are subject to
change without notice.
©2010-2015 by Murata Electronics N.A., Inc.
RO3144E/E-1/E-2 (R) 7/31/15
7.
8.
9.
10.
Page 1 of 2
Derived mathematically from one or more of the following directly measured
parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
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.
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: CP  CO - 0.05 pF.
Tape and Reel Standard for ANSI / EIA 481.
www.murata.com
Temperature Characteristics
Electrical Connections
B
Pin
1
NC
2
Terminal
3
NC
4
NC
5
Terminal
6
NC
6
A 2
5
3
4
fC = f O , T C = T O
0
G
C
1
E
F
The curve shown accounts for resonator contribution only and does not
include external LC component temperature effects.
Connection
0
-50
-50
-100
-100
-150
-150
(f-fo ) / fo (ppm)
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.
-200
-80 -60 -40 -20
H
6
1
5
2
4
3
-200
0 +20 +40 +60 +80
T = TC - T O ( °C )
I
Characterization Test Circuit
Inductor LTEST is tuned to resonate with the static capacitance, CO, at FC.
D
J
6
1
From 50 
Network Analyzer
5
2
4
3
To 50 
Network Analyzer
K
L
N
K
N
Power Dissipation Test
O
N
M
M
50  Source
at F C
Case and Typical PCB Land Dimensions
Ref
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
Min
2.87
2.87
1.12
0.77
2.67
1.47
0.72
1.37
0.47
1.17
mm
Nom
3.00
3.00
1.25
0.90
2.80
1.60
0.85
1.50
0.60
1.30
3.20
1.70
1.05
0.81
0.38
Max
3.13
3.13
1.38
1.03
2.93
1.73
0.98
1.63
0.73
1.43
Min
0.113
0.113
0.044
0.030
0.105
0.058
0.028
0.054
0.019
0.046
P INCIDENT
Low-Loss
Matching
Network to
50 
P REFLECTED
Inches
Nom
0.118
0.118
0.049
0.035
0.110
0.063
0.033
0.059
0.024
0.051
0.126
0.067
0.041
0.032
0.015
Max
0.123
0.123
0.054
0.040
0.115
0.068
0.038
0.064
0.029
0.056
1
6
5
4
Typical Low-Power Transmitter Application
Modulation
Input
200k 
+9VDC
C1
47
L1
(Antenna)
1
6
2
3
5
4
C2
ROXXXXC
Bottom View
RF Bypass
470
Typical Local Oscillator Application
Output
200k 
C1
Equivalent RLC Model
+VDC
L1
0.05 pF*
Cp
Lm
3
Example Application Circuits
+VDC
Rm
2
1
Co = Cp + 0.05 pF
6
2
3
5
4
C2
*Case Parasitics
ROXXXXC
Bottom View
RF Bypass
Cm
©2010-2015 by Murata Electronics N.A., Inc.
RO3144E/E-1/E-2 (R) 7/31/15
Page 2 of 2
www.murata.com
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