Ceramic Filters
Lt455 /450...U Series Ceramic Filters
Features
● Input / Output Impedance: 1000Ω ~ 2000Ω
● Highly Selective Ceramic Filters
● Center frequency: 450kHz, 455kHz
● RoHS Compliant
● Insertion Loss (dB) max: 4 db, 6 db
● Pass Band Ripple (dB) max: 2 db
● Applications: Mobile cellular, etc
Part Number
Insertion
Loss
(dB) Max.
50dB
Band Width
(KHz) Min.
LT455BU
Test Ciruict Charactieristics
Dimensions[mm]
±30
8.
0
②
③
①Input
③GND
②Output
Center
Frequency
(KHz)
Input /Output
Impedance (Ω)
455±2.0
2 30 1500
LT455CU
±24
455±2.0
2
30
1500
LT455DU
±20
455±1.5
2
30
1500
LT455EU
±15
455±1.5
2
30
1500
LT455FU
±12.5
455±1.5
2 30 2000
LT455GU
±10
455±1.5
2
30
2000
LT455HU
±9
455±1.0
2
30
2000
LT455IU
±7.5
455±1.0
2
30
2000
6dB
Band Width
(KHz) Min.
Stop Band Att.
±100KHz
(dB) Min.
Passband
Ripple
(dB) Max.
LT455HTU
±9
455±1.0
2
40
2000
4
4
4
6
6
6
6
6
6
±15
±12.5
±10
±7.5
±6
±4.5
±3
±2
±3
Part Number
Insertion
Loss
(dB) Max.
50dB
Band Width
(KHz) Min.
LT450BU
±30
Center
Frequency
(KHz)
Input /Output
Impedance (Ω)
450±2.0
2 30 1500
LT450CU
±24
450±2.0
2
30
1500
LT450DU
±20
450±1.5
2
30
1500
LT450EU
±15
450±1.5
2
30
1500
LT450FU
±12.5
450±1.5
2 30 2000
LT450GU
±10
450±1.5
2
30
2000
LT450HU
±9
450±1.0
2
30
2000
LT450IU
±7.5
450±1.0
2
30
2000
6dB
Band Width
(KHz) Min.
Stop Band Att.
±100KHz
(dB) Min.
Passband
Ripple
(dB) Max.
LT450HTU
±9
450±1.0
2
35
2000
4
4
4
6
6
6
6
6
6
��15
±12.5
±10
±7.5
±6
±4.5
±3
±2
±3
Standard Specification (450KHz)
Standard Specification (455KHz)
7
.
0
2.9
4.3
①
LT4
5
5E
U
R1
Rg
S.S.G
R2
RF
V.W
①
②
③
Filter
Rg+R1=R2=Input /Output Impedance
Attenuation (dB)
Frequency (KHz)
10
20
30
40
50
0
410 430 450 460 480 500
LT455BU
LT455EU
LT455HU
8.0
4.0
①
②
③
2.70.8
4.3