BLFY455B

Manufacturer Part NumberBLFY455B
Description(LFYM Series) AM Ceramic Filters
ManufacturerTOKO
BLFY455B datasheet
 
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TYPE
16
LFY
LFYM
TYPE LFY,LFYM
LFY
Description
• AM Ceramic filters are connected in a ladder structure
and are available as either 4/6 element devices
• Bandwidths from 6 to 30 kHz
Features
• 450, 455 kHz, (460kHz and 486kHz by Special request)
• High Selectivity
• Compact Package
• Version with group delay variations specified also available
Applications
• AM radio cassettes, AM stereo sets
• Cordless telephones, Pagers, Cellular phones
• Two-way radios
STANDARD FILTERS SELECTION GUIDE
TYPE LFY/LFYM
TOKO
Center *
Part
Frequency
Number
(kHz)
LFY
ALFY455H
455 1.0
ALFY455G
455 1.0
ALFY455F
455 1.0
ALFY455E
455 1.0
BLFY455D
455 2.0
BLFY455C
455 2.0
BLFY455B
455 2.0
LFYM
ALFYM455H
455 1.0
ALFYM455G
455 1.0
ALFYM455F
455 1.0
ALFYM455E
455 1.0
BLFYM455D
455 2.0
BLFYM455C
455 2.0
BLFYM455B
455 2.0
* For 450kHz, substitute 450 for 455 in part number.
R1
5
LFY
50
Rg
1 2
3 4
Test circuit
R2
E1
SG.
Z = Rg + R1 =R2
1.800.PIK.TOKO
www.tokoam.com
4
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AM Ceramic Filters
Unit: mm
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Bandwidth
Bandwidth
at 6 dB
at 50 dB
(kHz)
(kHz)
3.0 min.
9.0 min.
4.5 min.
10.0 min.
6.0 min.
12.5 min.
7.5 min.
15.0 min.
10.0 min.
20.0 min.
12.5 min.
24.0 min.
15.0 min.
30.0 min.
3.0 min.
9.0 min.
4.5 min.
10.0 min.
6.0 min.
12.5 min.
7.5 min.
15.0 min.
10.0 min.
20.0 min.
12.5 min.
24.0 min.
15.0 min.
30.0 min.
1
R1
LFYM
50
Rg
3
Test circuit
E.V.
E2
E1
SG.
Z = Rg + R1 =R2
1.847.297.0070
Meeting Your Needs
LFYM
Frequency Response
LFY / LFYM (6 element)
0
20
40
60
Bandwidth
Rank:
80
C = 12.5kHz
E = 7.5kHz
C E
H
H = 3kHz
100
415 425 435 445 455 465 475 485 495
Frequency (kHz)
Attenuation
Insertion
Input/Output
fo
100 KHz
Loss
Impedance
(dB)
(dB)
35.0 max.
6.0 max.
35.0 max.
6.0 max.
35.0 max.
6.0 max.
35.0 max.
6.0 max.
35.0 max.
4.0 max.
35.0 max.
4.0 max.
35.0 max.
4.0 max.
35.0 max
6.0 max.
35.0 max
6.0 max.
35.0 max
6.0 max.
35.0 max
6.0 max.
35.0 max
4.0 max.
35.0 max
4.0 max.
35.0 max
4.0 max.
2
Test conditions
4
5
1. C includes test circuit capacitance.
E.V.
R2
E2
2. R
, R
: Input-output impedance
1
2
Cs: Stray capacitance
(less than 50pF, including EV)
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Unit: mm
(k )
2.0
2.0
2.0
1.5
1.5
1.5
1.5
2.0
2.0
2.0
1.5
1.5
1.5
1.5
R-LOG0502A
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