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CFULA455KB2A-B0

Ceramic Filters (CERAFIL®)/Ceramic Discriminators for Communications Equipment

Murata Manufacturing 

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Ceramic Filters (CERAFILr)/Ceramic Discriminators for Communications Equipment

CERAFILr Plastic Case Miniaturized Type CFULB_A Series

CFULB_A series ceramic filters are miniature, high

performance ceramic filters composed of piezoelectric

elements connected in a ladder form.

These filters, with only 6.3mm high, are 65% the

volume of conventional types. (CFULA455K_A series)

They are well suited for miniaturizing various kinds

of communications equipment, pocket pagers, car

radios, cordless telephones and mobile telephones.

s Features

1. Miniature and high selectivity.

2. A variety of bandwidths are available.

3. Operating temperature range : -20 to +80 (degree C)

Storage temperature range : -40 to +85 (degree C)

6.5±0.3

MARKING

EIAJ

CODE

0.15±0.05

0.8±0.3

2.4±0.3 1.8±0.3 0.7±0.3

(1) (2)

(3) (4)

0.7±0.1

Connection

(1) : Input

(2) : Output

}(3)

(4)

:

Ground

0.5±0.1

(in mm)

Type

Marking

CFULB455KB2A-B0 55B

CFULB455KC2A-B0 55C

CFULB455KD4A-B0 55D

CFULB455KE4A-B0 55E

CFULB455KF4A-B0 55F

CFULB455KG1A-B0 55G

CFULB455KH1A-B0 55H

CFULB455KJ1A-B0 55I

Part Number

CFULB455KB2A-B0

Center

Frequency (fo)

(kHz)

455.0

±2.0kHz

6dB

Bandwidth

(kHz)

fn±15.0

min.

Stop

Bandwidth

(kHz)

fn±30.0 max.

[within 40dB]

Stop Band

Attenuation

(dB)

27 min.

[within fn±100kHz]

Insertion

Loss

(dB)

4.0 max.

[at minimum loss point]

Input/Output

Impedance

(ohm)

1500

CFULB455KC2A-B0

455.0

±2.0kHz

fn±12.5

min.

fn±24.0 max.

[within 40dB]

27 min.

[within fn±100kHz]

4.0 max.

[at minimum loss point]

1500

CFULB455KD4A-B0

455.0

±1.5kHz

fn±10.0

min.

fn±20.0 max.

[within 40dB]

27 min.

[within fn±100kHz]

4.0 max.

[at minimum loss point]

1500

CFULB455KE4A-B0

455.0

±1.5kHz

fn±7.5

min.

fn±15.0 max.

[within 40dB]

27 min.

[within fn±100kHz]

6.0 max.

[at minimum loss point]

1500

CFULB455KF4A-B0

455.0

±1.5kHz

fn±6.0

min.

fn±12.5 max.

[within 40dB]

27 min.

[within fn±100kHz]

6.0 max.

[at minimum loss point]

2000

CFULB455KG1A-B0

455.0

±1.0kHz

fn±4.5

min.

fn±10.0 max.

[within 40dB]

25 min.

[within fn±100kHz]

6.0 max.

[at minimum loss point]

2000

CFULB455KH1A-B0

455.0

±1.0kHz

fn±3.0

min.

fn±9.0 max.

[within 40dB]

35 min.

[within fn±100kHz]

6.0 max.

[at minimum loss point]

2000

CFULB455KJ1A-B0

455.0

±1.0kHz

fn±2.0

min.

fn±7.5 max.

[within 40dB]

35 min.

[within fn±100kHz]

6.0 max.

[at minimum loss point]

2000

For safety purposes, connect the output of filters to the IF amplifier through a D.C. blocking capacitor. Avoid applying a direct current to the output of ceramic filters.

(fn) means nominal center frequency 455kHz.

The order quantity should be an integral multiple of the "Minimum Quantity" shown in package page in this catalog.

12

s Test Circuit

R1

Rg

E1

S.S.G.

0dBm

(1) (2)

(3) (4)

R2

E2

RF Voltmeter

Connection

(1) : Input

(2) : Output

(3)(4) :Ground

Rg+R1=R2=Input/Output Impedance

35

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