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