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RF1414D (R) 4/6/15 Page 1 of 2
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Characteristic Sym Notes Minimum Typical
Maximu
m
Units
Center Frequency at 25°C Absolute Frequency
f
c
1, 2, 3
372.500 MHz
Insertion Loss
IL
MIN
1, 3 2.1 3.0 dB
3 dB Bandwidth
BW
3
1, 3
350 500
kHz
Rejection Attenuation: (relative to ILmin) 10 - 354 MHz
1, 3
45 50
dB
354 - 364 MHz 35 40
364 - 369 MHz 25 30
369 - 370 MHz 14 15
374 - 378 MHz 25 30
378 - 380 MHz 15 20
380 - 382 MHz 20 25
382 - 389 MHz 25 28
389 - 550 MHz 45 50
550 - 1000 MHz 40 45
Temperature Freq. Temp. Coefficient
FTC
0.032 ppm/°C
2
Frequency Aging Absolute Value during the First Year |fA| 5 ≤10 ppm/yr
Impedance @ fc
Input Z
IN
= R
IN
llC
IN
Z
IN
1
27.8 // 2.3 pf
Output Z
OUT
= R
OUT
llC
OUT
Z
OUT
41 // 2.3 pf
Lid Symbolization (Y=year WW=week S=shift) 528 // YWWS
Standard Reel Quantity Reel Size 7 Inch
9
500 Pieces/Reel
Reel Size 13 Inch 3000 Pieces/Reel
• Ideal Front-End Filter for European Wireless Receivers
• Low-Loss, Coupled-Resonator Quartz Design
• Simple External Impedance Matching
• Complies with Directive 2002/95/EC (RoHS)
The RF1414D is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide
front-end selectivity in 372.500 MHz receivers. Receiver designs using this filter include superhet with
10.7 MHz or 500 kHz IF, direct conversion and superregen. Typical applications of these receivers are
wireless remote-control and security.
This coupled-resonator filter (CRF) uses selective null placement to provide suppression, typically greater
than 40 dB, of the LO and image spurious responses of superhet receivers with 10.7 MHz IF. Murata’s
advanced SAW design and fabrication technology is utilized to achieve high performance and very low loss
with simple external impedance matching.
372.500 MHz
SAW Filter
RF1414D
SM3838-8 Case
3.8 x 3.8
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
NOTES:
1. Unless noted otherwise, all measurements are made with the filter installed in the specified test fixture which is connected to a 50 Ω test system with VSWR ≤ 1.2:1. The
test fixture L and C are adjusted for minimum insertion loss at the filter center frequency, f
c
. Note that insertion loss and bandwidth and passband shape are dependent on
the impedance matching component values and quality.
2. The frequency f
c
is defined as the midpoint between the 3dB frequencies.
3. Where noted specifications apply over the entire specified operating temperature range of -40°C to +90°C.
4. The 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
].
5. 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 significantly in subsequent years.
6. The design, manufacturing process, and specifications of this device are subject to change.
7. One or more of the following U.S. Patents apply: 4,54,488, 4,616,197, and others pending.
8. All equipment designs utilizing this product must be approved by the appropriate government agency prior to manufacture or sale.
9. Tape and Reel Standard Per ANSI / EIA 481.
Pb
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