• Ideal Front-End Filter for European Wireless Receivers
• Low-Loss, Coupled-Resonator Quartz Design
• Simple External Impedance Matching
• RoHS Compliant
• Complies with Directive 2002/95/EC (RoHS)
The RF3404E is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide
front-end selectivity in 433.92 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 devices operating in Europe under ETSI I-ETS 300 220.
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.
3.0 x 3.0
Center Frequency at 25°C Absolute Frequency
Tolerance from MHz
Insertion Loss (433.760 - 434.080)
3 dB Bandwidth
Rejection Attenuation: (relative to ILmin)
10 - 414 MHz
414 - 424 MHz
424 - 430 MHz
430 - 432 MHz
436 - 437 MHz
437 - 440 MHz
441 - 445 MHz
445 - 1000 MHz
Freq. Temp. Coefficient
Absolute Value during the First Year
Impedance @ fc
Input ZIN = RINllCIN
Output ZOUT = ROUTllCOUT
Lid Symbolization (Y=year WW=week S=shift)
Standard Reel Quantity
Reel Size 7 Inch
Reel Size 13 Inch
1, 2, 3
Minimum Typical Maximum
600 650 750
10 25 40
150 // 3.4pF
175 // 4.1pF
697 // YWWS
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
1. Unless noted otherwise, all measurements are made with the filter installed in the specified test fixture which is connected to a 50 test system with VSWR 1.2:1. The
test fixture L and C are adjusted for minimum insertion loss at the filter center frequency, fc. Note that insertion loss and bandwidth and passband shape are dependent on
the impedance matching component values and quality.
2. The frequency fc 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 +105°C.
4. The 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].
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.
©C2o0p1y0r-i2g0h1t5©byMMuurraattaaEMleacntrounfiaccstNu.rAin.,gInCc.o., Ltd. All Rights Reserved 2008
RF3404E (R) 4/10/15
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