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SAW Bandpass Filter F3256  
Features  
z
z
z
z
z
RF bandpass filter  
High attenuation  
Usable bandwidth 6.6MHz  
No matching 50Ω single-ended operation  
Ceramic Surface Mounted Device (SMD) Package  
Package Dimensions  
1.2±0.15  
5.00±0.15  
8
8
1
7
6
5
7
6
5
1
2
3
ITF  
3256  
2
3
4
4
Dimensions shown are nominal in millimeters  
Pin Configuration  
Body : Al2O3 Ceramic  
Lid : Kovar, Ni Plated  
Terminations : Au plating 0.3 ~ 1.0 um, Over a 1.27 ~ 8.89 um  
Ni Plating  
2
Input  
Output  
6
1, 3, 4, 5, 7, 8  
Case ground  
Maximum Ratings  
Parameter  
Unit  
°C  
Minimum  
Typical  
Maximum  
Operating Temperature Range  
Storage Temperature Range  
-10  
-40  
-
25  
-
60  
85  
-
°C  
Power Handling Capability  
dBm  
-
Electrostatics Sensitive Device (ESD)  
Part No.  
F3256  
2004-04-12  
I T F Co., Ltd.  
102-901, Bucheon Technopark 364,  
Samjeong-Dong, Ojeong-Gu, Bucheon-City,  
Gyounggi-Do, Korea 421-809  
Rev. Date  
Rev.  
1/7  
NS3002-AS01  
SAW Bandpass Filter F3256  
Specifications  
Fc = 325.3MHz  
Terminating source impedance : 50Ω  
Terminating load impedance  
: 50Ω  
Minimum  
Typical  
325.3  
3.0  
Maximum  
Center Frequency ( Fc )  
MHz  
dB  
-
-
-
-
-
-
-
3.5  
2.0  
-
Insertion Loss (Fc +/- 3.3 MHz)  
Amplitude Ripple (Fc +/- 3.3 MHz)  
Absolute Group Delay at Fc  
dB  
1.0  
nsec  
nsec  
80  
Group Delay Variation (Fc +/- 3.3 MHz)  
VSWR (Fc +/- 3.3 MHz)  
50  
-
1.5  
2.0  
Relative Attenuation  
…
~ Fc - 40 MHz  
dB  
50  
50  
55  
55  
-
-
Fc + 40 MHz ~  
…
Temperature Coefficient of Frequency  
ppm/°C  
-
-80  
Notes :  
1) All specifications are based on the matching schematic shown below, measured by Agilent Network analyzer and  
full 2 port calibration.  
2) Electrical margin has been built into the design to account for the variations due to temperature drift and manufacturing  
tolerances  
3) All attenuation measurements are measured relative to insertion loss  
Part No.  
Rev. Date  
Rev.  
F3256  
I T F Co., Ltd.  
102-901, Bucheon Technopark 364,  
Samjeong-Dong, Ojeong-Gu, Bucheon-City,  
Gyounggi-Do, Korea 421-809  
2004-04-12  
2/7  
NS3002-AS01  
SAW Bandpass Filter F3256  
Matching Schematic  
( Actual matching values may vary due to PCB layout and parasitics )  
Input  
50Ω  
Output  
50Ω  
Marking Configuration  
ITF1)  
32562)  
1) Manufacturer name  
2) Marking Number  
* Ink or Laser Marking available  
Part No.  
Rev. Date  
Rev.  
F3256  
2004-04-12  
I T F Co., Ltd.  
102-901, Bucheon Technopark 364,  
Samjeong-Dong, Ojeong-Gu, Bucheon-City,  
Gyounggi-Do, Korea 421-809  
3/7  
NS3002-AS01  
SAW Bandpass Filter F3256  
Typical Performance ( at 25℃ )  
6 Apr 2004 21:51:37  
2: . 85200 dB 6. 600 000 MHz  
CH1 S21  
LOG  
10 dB/ REF 0 dB  
2
1
PRm  
Cor  
CH1 Markers  
REF=1  
mean:-2 . 5482 dB  
s. dev : . 28090 dB  
p-p : . 86610 dB  
CENTER 325 . 300 000 MHz  
SPAN 100 . 000 000 MHz  
3 Apr 2004 11:05:42  
1:-2 . 6739 dB 325 . 300 000 MHz  
CH1 S21  
LOG  
10 dB/ REF 0 dB  
1
C
START . 030 000 MHz  
STOP 1 000 . 000 000 MHz  
Part No.  
F3256  
I T F Co., Ltd.  
102-901, Bucheon Technopark 364,  
Samjeong-Dong, Ojeong-Gu, Bucheon-City,  
Gyounggi-Do, Korea 421-809  
Rev. Date  
Rev.  
2004-04-12  
4/7  
NS3002-AS01  
SAW Bandpass Filter F3256  
Input / Output VSWR Charts  
3 Apr 2004 11:01:04  
3 Apr 2004 11:01:13  
1: 1. 5130 325 . 300 000 MHz  
CH1 S11  
SWR  
1
/
REF 1  
1: 1. 5016  
325 . 300 000 MHz  
CH1 S22  
SWR  
1
/
REF 1  
Cor  
Cor  
1
1
CENTER 325 . 300 000 MHz  
SPAN 100 . 000 000 MHz  
CENTER 325 . 300 000 MHz  
SPAN 100 . 000 000 MHz  
Input / Output Smith Charts  
3 Apr 2004 11:00:43  
3 Apr 2004 11:00:53  
65. 490 pF 325 . 300 000 MHz  
CH1 S11  
1 U FS  
1: 34. 922  
-8 . 0664  
60. 654 pF  
325 . 300 000 MHz  
CH1 S22  
1 U FS  
1: 34. 375  
-7 . 4707  
Cor  
Cor  
1
1
CENTER 325 . 300 000 MHz  
SPAN 100 . 000 000 MHz  
CENTER 325 . 300 000 MHz  
SPAN 100 . 000 000 MHz  
Part No.  
Rev. Date  
Rev.  
F3256  
I T F Co., Ltd.  
102-901, Bucheon Technopark 364,  
Samjeong-Dong, Ojeong-Gu, Bucheon-City,  
Gyounggi-Do, Korea 421-809  
2004-04-12  
5/7  
NS3002-AS01  
SAW Bandpass Filter F3256  
Packing Specification  
1. Reeling Quantity : 1000 pcs / reel  
2. Taping Structure : The tape shall be wound around the reel in the direction shown below.  
TOP COVER TAPE  
REEL  
CARRIER TAPE  
Tape Specification  
1. Leader part and vacant position specification  
Vacant  
150mm min.  
Component  
contained  
Vacant  
150mm min.  
Leader part  
250mm min.  
END  
START  
Tape Running Direction  
2. Tensile strength of carrier tape  
4.4N/mm width  
Direction of pull  
Top cover tape  
3. Top cover tape adhesion  
1) pull off angle : 0~15°  
2) speed : 300mm/min  
3) force : 20~70g  
0~15 degree  
Carrier tape  
Part No.  
Rev. Date  
Rev.  
F3256  
2004-04-12  
I T F Co., Ltd.  
102-901, Bucheon Technopark 364,  
Samjeong-Dong, Ojeong-Gu, Bucheon-City,  
Gyounggi-Do, Korea 421-809  
6/7  
NS3002-AS01  
SAW Bandpass Filter F3256  
Carrier Tape Dimensions [unit : mm]  
A
B
C
D
E
F
5.50 ± 0.1  
5.50 ± 0.1  
7.25 ± 0.1  
1.95 ± 0.1  
12.00 ± 0.1  
8.00 ± 0.1  
Part Direction  
Tape Running Direction  
Reel Dimensions [unit : mm]  
Part No.  
Rev. Date  
Rev.  
F3256  
2004-04-12  
I T F Co., Ltd.  
102-901, Bucheon Technopark 364,  
Samjeong-Dong, Ojeong-Gu, Bucheon-City,  
Gyounggi-Do, Korea 421-809  
7/7  
NS3002-AS01