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RF1432C (R) 4/7/15 Page 1 of 3
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Characteristic Sym Notes Minimum Typical Maximum Units
Center Frequency at 25°C Absolute Frequency f
C
1, 2
319.420 319.580 MHz
Tolerance from 319.500 MHz Δf
C
±80 kHz
Insertion Loss IL 1 1.8 2.8 dB
3 dB Bandwidth BW
3
1, 2
500 600 800
kHz
Rejection at f
c
- 21.4 MHz (Image)
1
40 50
dBat f
c
- 10.7 MHz (LO) 40 50
Ultimate 80
Temperature Operating Case Temperature T
C
3, 4
-40 +85
°C
Turnover Temperature T
O
25 40 55 °C
Turnover Frequency f
O
f
C
MHz
Frequency Temperature Coefficent FTC 0.032
ppm/°C
2
Frequency Aging Absolute Value during the First Year IfAI 5 ≤10 ppm/yr
Impedance @ FC INPUT Z
IN
= R
IN
// C
IN
Z
IN
1
3.97kΩ // 4.37pF
OUTPUT Z
OUT
= R
OUT
// C
OUT
Z
OUT
1
2.56kΩ // 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 (SAW) 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 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 (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, f
c
. Note that insertion loss, 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.
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 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
SM5050-8 Case
5 x 5
Copyright © Murata Manufacturing Co., Ltd. All Rights Reserved 2007
