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©2008 by RF Monolithics, Inc. RF1432C - 3/21/08
Electrical Characteristics
Characteristic Sym Notes Minimum Typical Maximum Units
Center Frequency at 25°C Absolute Frequency fC1, 2 319.420 319.580 MHz
Tolerance from 319.500 MHz ∆fC±80 kHz
Insertion Loss IL 1 1.8 2.8 dB
3 dB Bandwidth BW31, 2 500 600 800 kHz
Rejection at fc - 21.4 MHz (Image)
1
40 50
dBat fc - 10.7 MHz (LO) 40 50
Ultimate 80
Temperature Operating Case Temperature TC
3, 4
-40 +85 °C
Turnover Temperature TO25 40 55 °C
Turnover Frequency fOfCMHz
Frequency Temperature Coefficent FTC 0.032 ppm/°C2
Frequency Aging Absolute Value during the First Year IfAI 5 ≤10 ppm/yr
Impedance @ FC INPUT ZIN = RIN // CIN ZIN 13.97kΩ // 4.37pF
OUTPUT ZOUT = ROUT // COUT ZOUT 12.56kΩ // 4.27pF
Lid Symbolization (in addition to Lot and/or Date Codes) 621 // DATECODE
• 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 RF1432C is a low-loss, compact and economical surface-acoustic-wave (SA W) filter designed to provide
front-end selectivity in 319.500 MHz receivers. Recevier designs using this filter include superhet with
10.7 MHz or 500 kHz IF, direct conversion and superregen.
This coupled-resonator filter (CRF) uses selective null placement to provide suppression, typically greater
than 40 dB, of the LO and image spurious res ponses 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 (not included) . Quartz construction provides excellent frequency
stability over a wide temperature range.
319.500 MHz
SAW Filter
RF1432C
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, 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.
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 tem peratures
above +65°C. Typically, aging is grea test 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 produc t must be approved by the appropriate government agency prior to manufacture or sale.
Pb
SM5050-8 Case
5 x 5
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©2008 by RF Monolithics, Inc. RF1432C - 3/21/08
CH1 S 11 1 U FS
Cor
PRm
CH2 S 22 1 U FS
CENTER 319.500 000 MHz SPAN 2.000 000 MHz
Cor
PRm
13 Jun 2006 05:48:35
1
1_ 47.43 0.877 436.84 pH
319.500 000 MHz
1
1_: 49. 184 -3.638 7 136.9 pF
319.500 000 MHz
RF1432C SN2 R7
Full
Full
CH1 S21 log MAG 1 dB/ REF -4 dB
CH1 CENTER 319.500 000 MHz SPAN 2.000 000 MHz
Cor
PRm
CH2 S21 log MAG REF -3 dB10 dB/
CH2 CENTER 319.500 000 MHz SPAN 50.000 000 MHz
Cor
PRm
13 Jun 2006 05:49 : 0 8
1
2
3 4
1_: 0 dB
0.000 000 MHz
Max REF=1
BW: .608 859 MHz
cent : 319.496746 MHz
Q: 524.75
1_ loss: - 1.8101 dB
1
2
3
1_ 0 dB
0.000 000 MHz
REF=1
2_ -58.8 38 dB
-10.7 MHz
3_ -58.0 07 dB
-21.4 MHz
RF1432C SN2 R7
Resp
Resp
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©2008 by RF Monolithics, Inc. RF1432C - 3/21/08
A
1
2
3
B
7
6
5
4
C
D7
6
5
4
E
F
G
1
2
3
88
Absolute Maximum Ratings
Rating Value Units
Input Power Level 10 dBm
DC V oltage 12 VDC
S torage Temperature5-40 to +85 °C
Soldering Temperature (10 seconds / 5 cycles max.) 260 °C
Pin Connection
1 Input
2 Input Ground
3 Ground
4 Case Ground
5 Output
6 Output Ground
7 Ground
8 Case Ground
Matching Circuit to 50Ω
Electrical Connections
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
C1.30 1.50 1.7 0.050 0.060 0.067
D1.98 2.08 2.18 0.078 0.082 0.086
E1.07 1.17 1.27 0.042 0.046 0.05
F0.50 0.64 0.70 0.020 0.025 0.028
G2.39 2.54 2.69 0.094 0.100 0.106
Case Dimensions
1
2
3
8
Input
Output
7
6
54
82nH
82nH
Pin Connection
1 Input Ground
2 Input
3 Ground
4 Case Ground
5 Output Ground
6 Output
7 Ground
8 Case Ground
Optional Electrical Connections Matching Circuit to 50Ω
7
6
54
1
2
3
8Input
Output 82 nH82 nH
