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©2008 by RF Monolithics, Inc. RF1404C - 3/21/08
Electri cal C harac ter is tics
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 12.4 4.0 dB
Passband (relative to ILmin)433.740 - 434.010 13.0 dB
433.680 - 434.160 6.0
Passband (relative to ILmin)BW
3
1
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 ; Input ZIN=RIN//CIN 1227Ω // 3.3pF
Output ZOUT=ROUT//COUT 1227Ω // 3.3pF
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 // YWWS
Standard Reel Quantity Reel Size 7 Inch 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 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 th an 40 dB, of the LO and i mage spuri ous respon ses of su perhet recei vers 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.
433.9 2 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 band-
width 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.
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 prolo nged 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
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©2008 by RF Monolithics, Inc. RF1404C - 3/21/08
Typical Filter Response
Typical filter responses are shown below. The actual response is dependent on external impedance matching and circuit layout.
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©2008 by RF Monolithics, Inc. RF1404C - 3/21/08
Absolute Maximum Ratings
Rating Value Units
Input Power Level 10 dBm
DC V oltage 12 VDC
S torage Temperature -40 to +120 °C
Operating Temperature -40 to +105 °C
Soldering Temperature (10 seconds / 5 cycles max.) 260 °C
Pin Connection
1 Input Gro und
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
