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TOKO
TOKO

LFYM Datasheet

AM CERAMIC FILTERS


LFYM Datasheet Preview


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
• Lead-free terminations
Applications
• AM radio cassettes, AM stereo sets
• Cordless telephones, pagers
• Two-way radios
Dimensions
LFY
LFY/LFYM
AM CERAMIC FILTERS
Unit: mm
www.DataSheet4U.com
LFYM
Unit: mm
STANDARD FILTERS SELECTION GUIDE
TYPE LFY/LFYM
TOKO
Part
Number
Center *
Frequency
(kHz)
Bandwidth
at 6 dB
(kHz)
LFY
ALFY455H
ALFY455G
ALFY455F
ALFY455E
BLFY455D
BLFY455C
BLFY455B
LFYM
ALFYM455H
ALFYM455G
ALFYM455F
ALFYM455E
BLFYM455D
BLFYM455C
BLFYM455B
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
±3.0 min.
±4.5 min.
±6.0 min.
±7.5 min.
±10.0 min.
±12.5 min.
±15.0 min.
±3.0 min.
±4.5 min.
±6.0 min.
±7.5 min.
±10.0 min.
±12.5 min.
±15.0 min.
* For 450kHz, substitute 450 for 455 in part number.
Bandwidth
at 50 dB
(kHz)
±9.0 min.
±10.0 min.
±12.5 min.
±15.0 min.
±20.0 min.
±24.0 min.
±30.0 min.
±9.0 min.
±10.0 min.
±12.5 min.
±15.0 min.
±20.0 min.
±24.0 min.
±30.0 min.
Attenuation
fo ± 100 KHz
(dB)
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
Insertion
Loss
(dB)
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.
Input/Output
Impedance
(kΩ)
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
August 2005
© 2005 TOKO America, Inc.
All Rights Reserved
Printed in USA
CF-318-LFY/M
R-LOG0805A
1
Page 1

Frequency Response
LFY / LFYM (6 element)
LFY/LFYM
AM CERAMIC FILTERS
0
20
40
60
80
CEH
100
415 425 435 445 455 465 475 485 495
Frequency (kHz)
Bandwidth
Rank:
C = ±12.5kHz
E = ±7.5kHz
H = ±3kHz
Test Circuit
Test Conditions
1. C includes test circuit capacitance.
2. R1, R2: Input-output impedance
Cs: Stray capacitance
(less than 50pF, including EV)
LFY
Test circuit
50Rg
SG.
R1
E1
5
1 2 3 4R2
E2
Z = Rg + R1 =R2
E.V.
LFYM
Test circuit
50Rg
R1
SG. E1
12
4
35
R2
E2
Z = Rg + R1 =R2
E.V.
The information furnished by TOKO, Inc. is believed to be accurate and reliable. However, TOKO reserves the right to make changes or improvements in the design, specification or manufacture
of its products without further notice. TOKO does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or
other rights of third parties which may result from the use of its products. No license is granted by implication or otherwise under any patent or patent rights of TOKO, Inc.
TOKO America, Inc.
1250 Feehanville Drive, Mount Prospect, Illinois 60056
Tel: (847) 297-0070 Fax: (847) 699-7864 Web: http://www.tokoam.com
August 2005
© 2005 TOKO America, Inc.
All Rights Reserved
Printed in USA
CF-318-LFY/M
R-LOG0805A
2
Page 2
Part Number LFYM
Manufactur TOKO
Description AM CERAMIC FILTERS
Total Page 2 Pages
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