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RF1404C (R) 4/6/15 Page 1 of 3 www.murata.com
Characteristic Sym Notes Minimum Typical Maximum Units
Center Frequency at 25 °C Absolute Frequency fC1, 2 433.920 MHz
Minimum Insertion Loss, 433.800 - 434.120 MHz ILmin 12.44.0dB
Passband (relative to ILmin)433.740 - 434.010 MHz 13.0 dB
433.680 - 434.160 MHz 6.0
Passband (relative to ILmin)BW
31 650 700 kHz
Attenuation: (relative to ILmin)10 - 414 MHz
1
45 48
dB
414 - 427.5 MHz 40 43
427.5 - 432.92 MHz 15 19
434.92 - 442 MHz 10 14
442 - 550 MHz 35 38
550 - 1000 MHz 45 50
Impedance at fC: ZIN = RIN ||CIN 1227Ω || 3.3 pF
ZOUT = ROUT || COUT 1227Ω || 3.3 pF
Turnover To 3, 4 25 °C
Frequency Aging Absolute Value During the First Year 3, 4 ≤10 ppm/yr Typical
Lid Symbolization (in addition to Lot and/or Date Codes) 499
Standard Reel Quantity Reel Size 7 Inch 500 Pieces/Reel
Reel Size 13 Inch 3000 Pieces/Reel
• 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 RF1404C 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. RFM’s advanced SAW design and fabrication technology is utilized to achieve high
performance and very low loss with simple external impedance matching.
433.92 MHz
SAW Filter
RF1404C
SM5050-8 Case
5 x 5
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, 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 3 dB frequencies.
3. Where noted specifications apply over the entire specified operating temperature range.
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-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 without notice.
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.
Pb
Copyright © Murata Manufacturing Co., Ltd. All Rights Reserved 2003
©2010-2015 by Murata Electronics N.A., Inc.
RF1404C (R) 4/6/15 Page 2 of 3 www.murata.com
Typical Filter Response
Typical filter responses are shown below. The actual response is dependent on external impedance matching and circuit layout.
Copyright © Murata Manufacturing Co., Ltd. All Rights Reserved 2003
©2010-2015 by Murata Electronics N.A., Inc.
RF1404C (R) 4/6/15 Page 3 of 3 www.murata.com
Rating Value Units
Input Power Level 10 dBm
DC Voltage 12 VDC
Storage Temperature -40 to +120 °C
Operating Temperature -40 to +105 °C
Soldering Temperature, 10 seconds/5 cycles maximum 260 °C
Pin Connection
1 Input Ground
2 Input
3 to be Grounded
4 Case Ground
5 Output
6 Output Ground
7 to be Grounded
8 Case Ground
Matching Circuit to 50Ω
Electrical Connections
A
1
2
3
B
7
6
5
4
C
D7
6
5
4
E
F
G
1
2
3
88
Dimension mm Inches
Min Nom Max Min Nom Max
A4.8 5.0 5.2 0.189 0.197 0.205
B4.8 5.0 5.2 0.189 0.197 0.205
C1.7 0.067
D2.08 0.082
E1.17 0.046
F0.64 0.025
G2.39 2.54 2.69 0.094 0.100 0.106
Case Dimensions
7
6
54
1
2
3
8Input
Output
36 nH
36 nH
5.1 pF
5.1 pF
7
6
54
1
2
3
8Input
Output
36 nH
36 nH
5.1 pF
5.1 pF
Matching Circuit to 50Ω
Alternate Matching Circuit to 50Ω
36 nH
39 nH
Copyright © Murata Manufacturing Co., Ltd. All Rights Reserved 2003
