BLFY455B TOKO, BLFY455B Datasheet
BLFY455B
Manufacturer Part Number
BLFY455B
Description
(LFYM Series) AM Ceramic Filters
Manufacturer
TOKO
Datasheet
1.BLFY455B.pdf
(1 pages)
www.DataSheet4U.com
DataSheet
* For 450kHz, substitute 450 for 455 in part number.
LFY
Test circuit
1.800.PIK.TOKO
TYPE LFY,LFYM
Description
• AM Ceramic filters are connected in a ladder structure
• 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
LFY
ALFY455H
ALFY455G
ALFY455F
ALFY455E
BLFY455D
BLFY455C
BLFY455B
LFYM
ALFYM455H
ALFYM455G
ALFYM455F
ALFYM455E
BLFYM455D
BLFYM455C
BLFYM455B
4
and are available as either 4/6 element devices
16
U
Number
TOKO
.com
Part
LFY
TYPE
LFY
LFYM
SG.
50
Rg
E1
R1
Z = Rg + R1 =R2
Frequency
www.tokoam.com
455 1.0
455 1.0
455 1.0
455 1.0
455 2.0
455 2.0
455 2.0
455 1.0
455 1.0
455 1.0
455 1.0
455 2.0
455 2.0
455 2.0
1 2
Center *
(kHz)
5
3 4
R2
www.DataSheet4U.com
E2
Bandwidth
E.V.
AM Ceramic Filters
10.0 min.
12.5 min.
15.0 min.
10.0 min.
12.5 min.
15.0 min.
at 6 dB
3.0 min.
4.5 min.
6.0 min.
7.5 min.
3.0 min.
4.5 min.
6.0 min.
7.5 min.
(kHz)
LFYM
Test circuit
1.847.297.0070
Unit: mm
Bandwidth
SG.
50
at 50 dB
10.0 min.
12.5 min.
15.0 min.
20.0 min.
24.0 min.
30.0 min.
10.0 min.
12.5 min.
15.0 min.
20.0 min.
24.0 min.
30.0 min.
9.0 min.
9.0 min.
(kHz)
Rg
E1
R1
Z = Rg + R1 =R2
1
3
4
2
LFYM
fo
5
Attenuation
R2
Frequency Response
LFY / LFYM (6 element)
35.0 max.
35.0 max.
35.0 max.
35.0 max.
35.0 max.
35.0 max.
35.0 max.
35.0 max
35.0 max
35.0 max
35.0 max
35.0 max
35.0 max
35.0 max
100
40
80
20
60
E2
(dB)
100 KHz
0
415 425 435 445 455 465 475 485 495
E.V.
C E
Frequency (kHz)
Test conditions
1. C includes test circuit capacitance.
2. R
H
1
, R
Insertion
6.0 max.
6.0 max.
6.0 max.
6.0 max.
4.0 max.
4.0 max.
4.0 max.
6.0 max.
6.0 max.
6.0 max.
6.0 max.
4.0 max.
4.0 max.
4.0 max.
Cs: Stray capacitance
2
: Input-output impedance
Loss
(dB)
Meeting Your Needs
(less than 50pF, including EV)
Input/Output
Bandwidth
Rank:
C = 12.5kHz
E = 7.5kHz
H = 3kHz
Impedance
www.DataSheet
www.DataSheet
www.DataSheet
www.DataSheet4U
(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
Unit: mm
4U
4U.com
4U
.com
.com
.com
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