RP Series TO39 Two-Port SAW Resonators
Electrical Connections
This two-port, three-terminal SAW resonator is bidirectional.
However, impedances and circuit board parasitics may not be
symmetrical, requiring slightly different oscillator component-
matching values.
Pin
1
2
3
Connection
Input or Output
Output or Input
Case Ground
Pin 1
Bottom View
Pin 2
Temperature Characteristics
The curve shown on the
right accounts for resona-
tor contribution only and
does not include LC com-
ponent temperature con-
tributions.
f
C
= f
O
, T
C
= T
O
0
(f-fo ) / fo (ppm)
0
-50
-100
-150
-200
0 +20 +40 +60 +80
-50
-100
-150
-200
-80 -60 -40 -20
∆
T = T
C
- T
O
( °C )
Pin 3
Typical Frequency Response
The plot shown below is a typical frequency response for the
RP series of two-port resonators. The plot is for RP1094.
Typical Test Circuit
Power Test
-10.0
200.0
100.0
-20.0
P
INCIDENT
1
2
0.0
-100.0
-30.0
-200.0
-300.0
3
-P
CW RF Power Dissipation = P
REFLECTED
INCIDENT
-40.0
-400.0
-500.0
Electrical Test
From 50
Ω
Network
Analyzer
1
2
3
-50.0
-600.0
-700.0
To 50
Ω
Network
Analyzer
-60.0
901.2
905.2
909.2
913.2
917.2
921.2
925.2
Frequency (MHz)
-800.0
929.2
Typical Application Circuits
This SAW resonator can be used in oscillator or transmitter de-
signs that require 180° phase shift at resonance in a two-port
configuration. One-port resonators can be simulated, as
shown, by connecting pins 1 and 2 together. However, for most
low-cost consumer products, this is only recommended for ret-
rofit applications and not for new designs.
Case Design
C
B
H
F
A
E
D
(3 places)
J
(2 places)
G
Conventional Two-Port Design:
Simulated One-Port Design:
1
2
45°
3
Millimeters
Dimensions
Min
Max
Min
Inches
Max
Equivalent LC Model
The following equivalent LC model is valid near resonance:
1
2
L
M
R
Co
M
C
M
Co
3
A
B
C
D
E
F
G
H
J
9.30
3.18
2.50
3.50
0.46 Nominal
5.08 Nominal
2.54 Nominal
2.54 Nominal
1.02
1.40
0.366
0.125
0.098
0.138
0.018 Nominal
0.200 Nominal
0.100 Nominal
0.100 Nominal
0.040
0.055
22
S21 phase (deg.)
S21 magn.(dB)
50
Ω
Source at
P
REFLECTED
F
C
Low-Loss
Matching
Network
to 50
Ω
RP Series SM-4A Two-Port SAW Resonators
Absolute Maximum Ratings
Rating
CW RF Power Dissipation (See: Typical Test Circuit)
DC Voltage Between Any Two Pins (Observe ESD Precautions)
Case Temperature
Value
+0
±30
-40 to +85
Units
dBm
VDC
°C
Electrical Connections
This two-port, three-terminal SAW resonator is bidirectional.
However, impedances and circuit board parasitics may not be
symmetrical, requiring slightly different oscillator component-
matching values.
Pin
1
2
3
4
Connection
Input or Output
Output or Input
Case Ground
Case Ground
Equivalent LC Model
1
2
L
M
R
Co
M
C
M
Co
3&4
Temperature Characteristics
The curve shown on
the right accounts for
resonator contribution
only and does not in-
clude LC component
temperature contribu-
tions.
f
C
= f
O
, T
C
= T
O
0
(f-fo ) / fo (ppm)
0
-50
-100
-150
-200
0 +20 +40 +60 +80
-50
-100
Typical Test Circuit
Ω
Ω
-150
-200
-80 -60 -40 -20
∆
T = T
C
- T
O
( °C )
Electrical Test:
Typical Circuit Board Land Pattern
The circuit board land pattern shown below is one possible de-
sign. The optimum land pattern is dependent on the circuit
board assembly process which varies by manufacturer. The
distance between adjacent land edges should be at a maximum
to minimize parasitic ca-
pacitance. Trace lengths
from terminal lands to oth-
er components should be
short and wide to minimize
parasitic series inductanc-
es.
Power Test:
PINCIDENT
50
Ω
Source
P
at F
REFLECTED
C
Low-Loss
Matching
Network to
50
Ω
CW RF Power Dissipation =
PINCIDENT
-
P REFLECTED
Typical Application Circuits
Simulated One-Port Design:
+
+
Case Design SM-4A
Conventional Two-Port Design:
Dimensions
SM-4A
A
B
C
D
E
F
G
H
Inches
Nominal
0.205
0.265
0.078
0.071
0.057
0.150
0.050
0.075
Millimeters
Nominal
5.21
6.73
1.98
1.80
1.45
3.81
1.27
1.91
23
RP Series
RP Two-Port 180° SAW Resonators
Resonant Freq. at 25°C
Insertion Loss
(dB)
Quality Factor
Ratings
Temperature Stability
CW RF
Power
Dissipa-
tion
(dBm)
Turnover Temp. T
O
(°C)
Turnover
Freq.
F
O
(kHz)
(All parameters measured in 50Ω system)
Part
Number
Absolute
F
c
(MHz)
Tolerance
∆
F
c
(kHz)
Typ.
Max
Unloaded
Q
50 W
Loaded Q
Min.
Value
Notes
RP1234
RP1098
RP1053
RP1239
RP1238
RP1237
RP1237-1
RP1298
RP1207-5
RP1308
RP1102
RP1286
RP1261
RP1094
RP1285
RP1103
Typ.
Max.
6, 7, 8
Typ.
2, 3, 4, 5
293.075
307.3
310.0
315.0
407.3
418.0
418.05
423.22
433.92
433.92
905.5
906.0
913.612
915.0
916.55
924.5
±100
±100
±250
±75
±100
±75
±75
±100
±75
±75
±250
±100
±212
±150
±150
±250
13.1
11.0
14
5.3
5.4
5.7
5.7
5.2
8.2
6.3
9.5
7.1
8.2
8.5
7.5
11.1
2, 5, 6
18.0
18.0
18
8.5
8.0
8.0
8.0
8.0
10.0
8.0
15.0
10.0
10.0
15.0
10.0
15.0
12,000
13,000
4,000
18,000
13,700
13,600
13,600
15,200
12,700
12,000
6,000
6,600
6,500
6,100
6,500
6,000
5, 6, 7
9,400
9,600
3,200
8,100
6,300
6,500
6,500
6,900
7,800
6,300
3,500
3,700
4,000
3,700
3,800
3,800
+5
+5
0
0
0
0
0
0
+5
0
+5
+5
+5
+5
+5
+5
38
33
47
37
43
47
47
24
40
36
44
16
23
53
23
34
53
48
62
52
58
62
62
39
55
51
59
31
38
68
38
49
68
63
77
67
73
77
77
54
70
66
74
46
53
83
53
64
f
c
+8.5
f
c
+6
f
c
f
c
+8.5
f
c
+16
f
c
+21
f
c
+21
f
c
+2.6
f
c
+14
f
c
+11
f
c
+39
f
c
+1
f
c
+5.7
f
c
+63
f
c
+5
f
c
+6
RO and RP Series 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 signifi-
cantly in subsequent years.
The frequency f
C
is the frequency of minimum IL with the resonator in the specified test fixture in a 50
Ω
test system
with VSWR
≤
1.2:1. Typically, f
OSCILLATOR
or f
TRANSMITTER
is less than the resonator f
C
. |F
A
| is typically ±10 ppm/
year.
One or more of the following United States patents apply: 4,454,488; 4,616,197, and others pending.
Typically, equipment utilizing this device requires emissions testing and government approval, which is the responsibil-
ity of the equipment manufacturer.
Unless noted otherwise, case temperature T
C
= +25°C± 5°C
The design, manufacturing process, and specifications of this device are subject to change without notice.
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
.
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° less than the
specified
resonator
T
O
.
This equivalent RLC model approximates RO surface mount resonator performance near the resonant frequency and is
2)
3)
4)
5)
6)
7)
8)
9a)
24
RP Series
RP Two-Port 180° SAW Resonators
RF Equivalent RLC Model
Packaging
Shunt Static Cap.
C
O
(pF)
Lid
Symbol
Min.
Typ.
Max.
Case Style
Typ. Circuit
and Freq.
(MHz)
Nom. Radio
Freq. (MHz)
(All parameters measured in 50Ω system)
Application -
For Reference Only
Part
Number
(Cont).
Motional Res.
R
m
(Ω)
Ω
Motional
Cap.
C
m
(fF)
Typ.
Motional
Ind.
L
m
(µH)
Typ.
Typ.
Max
Notes
5, 6, 7, 9
RP1234
RP1098
RP1053
RP1239
RP1238
RP1237
RP1237-1
RP1298
RP1207-5
RP1308
RP1102
RP1286
RP1261
RP1094
RP1285
RP1103
352
256
352
84
86
93
93
82
157
107
198
126
157
166
137
259
695
695
695
167
152
152
152
152
216
152
463
216
217
463
217
463
0.127215
0.134251
0.125
0.336771
0.330391
0.303334
0.305206
0.297547
0.183245
0.279470
0.106865
0.208528
0.171332
0.158119
0.194528
0.118860
2.31659
1.99801
2100
758.027
462.150
477.932
474.887
475.283
734.159
481.378
289.086
147.985
177.124
191.3434
155.005
249.340
1.0
1.0
1.0
1.9
2.1
2.0
2.0
2.2
1.4
1.4
1.0
1.6
1.4
1.1
1.7
1.1
1.3
1.3
1.3
2.2
2.4
2.3
2.3
2.5
1.7
1.7
1.3
1.9
1.7
1.4
2.0
1.4
1.6
1.6
1.6
2.5
2.7
2.6
2.6
2.8
2.0
2.0
1.6
2.2
2.0
1.7
2.3
1.7
TO39
TO39
TO39
TO39
TO39
TO39
TO39
TO39
TO39
TO39
TO39
TO39
TO39
TO39
TO39
TO39
P1234
P1098
334-A025
P1239
P1238
P1237
1237-1
P1298
1207-5
P1308
P1102
P1286
P1261
P1094
P1285
P1103
293.125 LO
307.25 LO
310.0TX
315.00 TX
407.30 LO
418.00TX
418.00 TX
423.22 LO
433.92 TX
433.92 TX
905.5 TX
905.80 LO
913.50 TX
914.95 TX
916.50 TX
924.5 TX
303.825
318
310.0
315.00
418.00
418.00
418.00
433.92
433.92
433.92
905.5
916.50
913.50
915
916.50
924.5
9b)
9c)
10)
11)
12)
13)
14)
15)
provided for reference only. The capacitance C
O
is the static (nonmotional) capacitance between the two terminals mea-
sured 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 be calcu-
lated as: C
P
≈
C
O
- 0.05 pF.
This equivalent RLC model approximates RO TO39 resonator performance near the resonant frequency and is provided
for reference only. The capacitance C
O
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 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
.
This equivalent RLC model approximates RP TO39 resonator performance near the resonant frequency and is provided
for reference only. The capacitance C
O
is the measured static (nonmotional) capacitance between either pin 1 and
ground or pin 2 and ground. The measurement includes case parasitic capacitance.
The typical FTC for TO-39 resonators is 0.037 ppm/°C
2
and the typical FTC for SMRs is 0.032 ppm/°C
2
.
The DC insulation resistance between any two pins is a minimum of 1 MΩ.
The DC voltage between any two pins (observe ESD precautions) is ±30 VDC.
The case temperature is rated between -40° to +85°C.
Soldering temperature is +250°C.
Maximum nominal insertion phase shift at resonance is 180° for the RP series.
25
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