RP1238
407.3 MHz
SAW Resonator
•
•
•
•
Ideal for 418 MHz Superhet Receiver LOs
Nominal Insertion Phase Shift of 180° at Resonance
Quartz Stability
Rugged, Hermetic, Low-Profile TO39 Case
The RP1238 is a two-port, 180° surface-acoustic-wave (SAW) resonator in a low-pro-
file TO39 case. It provides reliable, fundamental-mode, quartz frequency stabilization
of local oscillators operating at approximately 407.30 MHz. The RP1238 is designed
for 418.0 MHz superhet receivers in remote-control and wireless security applications
operating in the United Kingdom under DTI MPT 1340 and in the USA under FCC
Part 15.
TO39-3 Case
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical Maximum
407.400
Units
f
Center Frequency (+25°C)
Absolute Frequency
407.200
MHz
kHz
dB
C
2, 3, 4, 5,
2, 5, 6
Df
Tolerance from 407.300 MHz
±100
C
Insertion Loss
Quality Factor
IL
5.4
13,700
6,300
58
8.0
Q
Unloaded Q
U
5, 6, 7
Q
50 W Loaded Q
L
T
Temperature Stability
Turnover Temperature
Turnover Frequency
Frequency Temp. Coefficient
Absolute Value during First Year
43
73
°C
O
f
6, 7, 8
f +16
kHz
O
C
ppm/°C2
ppm/yr
MW
FTC
0.037
|f |
Frequency Aging
6
5
£ 10
A
DC Insulation Resistance between Any Two Pins
1.0
R
RF Equivalent RLC Model
Motional Resistance
Motional Inductance
Motional Capacitance
Shunt Static Capacitance
86
152
2.7
W
M
L
462.150
0.330391
2.4
5, 7, 9
5, 6, 9
µH
fF
M
C
M
C
2.1
pF
O
Lid Symbolization (in addition to Lot and/or Date Codes)
RFM P1238
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 frequency fC is the frequency of minimum IL with the resonator in the specified test fixture in a 50 W test system with VSWR £ 1.2:1. Typically,
fOSCILLATOR or fTRANSMITTER is less than the resonator fC.
3. One or more of the following United States patents apply: 4,454,488; 4,616,197.
4. Typically, equipment utilizing this device requires emissions testing and government approval, which is the responsibility of the equipment manufac-
turer.
5. Unless noted otherwise, case temperature TC = +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: 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 = fO [1 - FTC (TO - TC)2]. Typically, oscillator TO is 20° less than 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 measured static (nonmotional) capacitance between either pin 1 and ground or pin 2 and ground. The measurement includes case para-
sitic capacitance.
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-9148
E-mail: info@rfm.com
http://www.rfm.com
RP1238-120298
Page 1 of 2
©1998 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
5秒后页面跳转
SL74HC10N：高性能三输入与非门解析
AIC1781A 电池充电控制器深度解析
Pickering新高压舌簧继电器亮相汽车测试博览会
采用MCU+MPU双处理器架构实现的创新应用设计探索
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
