251920B datasheet(1/2 Pages) ITF

Part #	251920B

Description	140.0 MHz SAW Filter

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Manufacturer	ITF [Integrated Technology Future]

Direct Link	http://www.itf.co.kr

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140.0 MHz SAW Filter

Part Number 251920B

Tel: 82-32-621-1213

2010. 09.14

I T F

Co., Ltd.

102-901, Bucheon Technopark 364, Samjeong-Dong,

Ojeong-Gu, Bucheon-City,

Gyounggi-Do, Korea 421-809

Fax: 82-32-621-1218

http://www.itf.co.kr

sales@itf.co.kr

Rev 1.0

1. Features

Typical 1dB bandwidth of 19.79 MHz

High attenuation

Single Ended Operation

Dual In-line Package (DIP)

2. Electrical Specifications

Source and Load Impedance = 50

Operating Temperature :

+25℃

℃

Minimum

Typical

Maximum

Center Frequency (fo)

MHz

-

140.0

-

Insertion Loss

dB

-

25.5

27.0

2dB Bandwidth

MHz

19.75

19.79

19.85

25dB Bandwidth

MHz

-

20.57

20.65

40dB Bandwidth

MHz

-

20.75

-

Amplitude Ripple (fo ± 9.65 MHz)

dB

-

0.7

1.0

Group Delay Variation (fo ± 9.65 MHz)

nsec

-

60

150

Absolute Delay

usec

-

2.92

-

Ultimate Rejection

dB

45

50

-

Temperature Coefficient of Frequency

ppm/℃

℃

-

-84

-

D3512 Package Dimension

Matching Schematic

Pin Configuration

Input

1

Ground

2,4

7.6±0.2

6.0max

5.5max

12.8±0.5

Dimensions shown are nominal in millimeters

Base : Fe(SPCC), Au plating over Ni plated

Cap : Cu & Cr Alloy, Ni Plated

Termination : Kovar, Au Plated

Output

5

Others

Ground

Input

50Ω

Output

50Ω

39nH

1

5

39nH

22pF

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