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RP1236-1
•
•
•
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Designed for 312 MHz Low-Power Superhet Transmitters
Nominal Insertion Phase Shift of 180° at Resonance
Quartz Stability
312.0 MHz
SAW Resonator
Rugged, Hermetic, Low-Profile TO39 Case
The RP1236-1 is a two-port, 180° 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 312 MHz. Typical applications include wireless security and remote-
control receivers operating in the USA under FCC Part 15 and in Canada under DoC RSS-210.
Absolute Maximum Ratings
Rating
Value
Units
CW RF Power Dissipation (See: Typical Test Circuit)
DC Voltage Between Any Two Pins (Observe ESD Precautions)
Case Temperature
+0
dBm
VDC
°C
TO39-3 Case
±30
-40 to +85
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
MHz
Center Frequency
fC
Absolute Frequency
311.750
312.250
2, 3, 4, 5,
ΔfC
IL
Tolerance from 312.000 MHz
±250
13.0
kHz
dB
Insertion Loss
Quality Factor
2, 5, 6
5, 6, 7
8.1
QU
QL
TO
fO
Unloaded Q
14,000
50 Ω Loaded Q
8,500
39
Temperature Stability
Turnover Temperature
Turnover Frequency
Frequency Temp. Coefficient
Absolute Value during First Year
24
1.0
1.3
54
°C
fC+2.3
0.037
≤ 10
6, 7, 8
kHz
ppm/°C2
ppm/yr
FTC
|fA|
Frequency Aging
6
5
DC Insulation Resistance between Any Two Pins
MΩ
Ω
RF Equivalent RLC
RM
LM
CM
CO
Motional Resistance
Motional Inductance
Motional Capacitance
Shunt Static Capacitance
154
1.09824
0.236938
1.6
347
1.9
5, 7, 9
5, 6, 9
µH
fF
pF
Lid Symbolization (in addition to Lot and/or Date Codes)
RFM P1236
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
2.
Frequency aging is the change in f with time and is specified at +65°C or less. Aging may exceed the specification for prolonged temperatures above +65°C. Typically,
C
aging is greatest the first year after manufacture, decreasing significantly in subsequent years.
The frequency f 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
or
OSCILLATOR
C
f
is less than the resonator f .
TRANSMITTER
C
3.
4.
5.
One or more of the following United States patents apply: 4,454,488; 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 T = +25°C± 5°C
C
6.
7.
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 , IL, 3 dB bandwidth, f versus T , and C .
C
C
C
O
8.
Turnover temperature, T , is the temperature of maximum (or turnover) frequency, f . The nominal frequency at any case temperature, T , may be calculated from: f =
O
O
C
2
f
[1 - FTC (T - T ) ]. Typically, oscillator T is 20° less than the specified resonator T .
O C O O
O
9.
This equivalent RLC model approximates resonator performance near the resonant frequency and is provided for reference only. The capacitance C is the measured
O
static (nonmotional) capacitance between either pin 1 and ground or pin 2 and ground. The measurement includes case parasitic capacitance.
©2010-2015 by Murata Electronics N.A., Inc.
RP1236-1 (R) 2/11/15
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