Ceramic Filter for Communications Equipment CFWS455--YSeries
CERAFIL®
39
Resin Molded, G.D.T. Flat Type Ceramic Filter
No.P05E9.pdf 00.7.20This is the PDF file of catalog No.P05E-9.
*CERAFIL®is the Registered Trademark
of Murata Manufacturing Co., Ltd.
CFWS455-Y series are high selectivity ceramic filters, which
consist of 6 ceramic elements connected in a ladder form.
Most suitable for digital communications and mobile
telephones because of their improved G.D.T. characteristics.
!FEATURES
1. High selectivity.
2. A variety of bandwidth are available.
3. Excellent G.D.T. characteristics are available within pass
bandwidth.
4. Easily mounted on a printed circuit board.
5. Operating temperature range : Y20Dto W80D
Storage temperature range : Y40Dto W85D
!SPECIFICATIONS
Note : To take best advantage of safety features of ceramic filters, connect the output to an IF amplifier through a DC cut capacitor.
Avoid directly applying a direct current to output end of ceramic filters (between 5and 2,3,4).
(Back Side of PCB)
Connection
q Input
wer Ground
t Output Tol. without notice : T0.3
11.0T0.5 7.0T0.5
5-0.15
T
0.05
3.5T0.5
7.5T0.5
2.0
2.3T0.5
4.3
4.3
1.2
T
0.5
2.92.6 2.9 2.92.6 2.9
5-1.0φ Hole
2.0
0.6T0.1
0.8T0.1
qw e r
t
(in mm)
!DIMENSIONS
Connection
q Input
wer Ground
t Output
Rg
S.S.G.
R1
CFWS455
R2R.F.
Voltmeter
RgWR1=R2=Input/Output Impedance
q
t
wer
!TEST CIRCUIT
0
10
20
30
40
50
60
70
80
90
100 430 455 480 0
100
200
300
400
Frequency (kHz)
Attenuation (dB)
G.D.T. (µsec.)
!
CHARACTERISTICS
(CFWS455DY)
Character-
istics
Part Number
Center
Frequency
(kHz)
CFWS455BY
CFWS455CY
CFWS455DY
CFWS455EY
CFWS455FY
CFWS455GY
455T1.5
455T1.5
455T1.0
455T1.0
455T1.0
455T1.0
6dB Bandwidth
(kHz) min.
T15
T12.5
T10
T07.5
T06
T04.5
50dB Bandwidth
(kHz) max.
T35
T30
T25
T20
T17.5
T15
Attenuation
455T100kHz
(dB)min.
35
35
35
35
35
35
Insertion
Loss
(dB) max.
6
7
8
9
10
13
Input/Output
Impedance
(Ω)
1500
1500
1500
1500
2000
2000
G.D.T.Deviation
( µsec.) *
[30] (T10kHz)
[30] (T08kHz)
[30] (T07kHz)
[30] (T05kHz)
[40] (T04kHz)
[40] (T03kHz)
*Typical value.
