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74.76 MHz SAW Filter  
Part Number 231502B  
1. Features  
Typical 1dB bandwidth of 15.5 MHz  
High attenuation  
Single Ended Operation  
Dual Inꢀline Package (DIP)  
2. Electrical Specifications  
Source and Load Impedance = 50ꢁ  
Minimum  
Typical  
74.76  
24.0  
15.54  
15.85  
16.72  
17.1  
0.4  
Maximum  
Operating Temperature : -30~ +80℃  
Center Frequency (fo)  
Insertion Loss  
MHz  
dB  
25.5  
1dB Bandwidth  
MHz  
MHz  
MHz  
MHz  
dB  
15.40  
3dB Bandwidth  
20dB Bandwidth  
16.90  
40dB Bandwidth  
1.0  
80  
Amplitude Ripple (fo ± 7.25 MHz)  
Group Delay Variation (fo ± 7.25 MHz)  
Absolute Delay  
nsec  
usec  
dB  
30  
2.30  
55  
Ultimate Rejection  
50  
Temperature Coefficient of Frequency  
ppm/℃  
ꢀ72  
Room Temperature : +25℃  
Minimum  
Typical  
24.0  
0.4  
Maximum  
25.5  
Insertion Loss  
dB  
dB  
Amplitude Ripple (fo ± 7.55 MHz)  
Group Delay Variation (fo ± 7.55 MHz)  
Maximum Input Power : +10dBm  
1.0  
nsec  
30  
80  
D2012 Package Dimension  
Matching Schematic  
5
1
12.7±0.5  
5.5max 6.0max  
7.6±0.2  
Input  
50  
Output  
Ω
50Ω  
L1  
L2  
L1 = L2 = 150nH  
Pin Configuration  
Dimensions shown are nominal in millimeters  
Base : Fe(SPCC), Au plating over Ni plated  
Cap : Cu & Cr Alloy, Ni Plated  
Input  
1
5
Ground  
Others  
2,4  
Termination : Kovar, Au Plated  
Output  
Ground  
I T F Co., Ltd.  
102ꢀ901, Bucheon Technopark 364, SamjeongꢀDong,  
OjeongꢀGu, BucheonꢀCity,  
Tel: 82-32-621-1213  
Fax: 82-32-621-1218  
http://www.itf.co.kr  
sales@itf.co.kr  
2013. 04. 01  
Rev 1.0  
GyounggiꢀDo, Korea 421ꢀ809  
74.76 MHz SAW Filter  
Part Number 231502B  
3. Typical Performance ( at +25)  
1dB Bandwidth & Ripple  
40dB Bandwidth  
17 May 2012 14:39:34  
17 May 2012 15:15:05  
CH1 S21  
CH2 S21  
LOG  
LOG  
1 dB/ REF -23.49 dB  
1 dB/ REF -23.87 dB  
1: 0. 0000 dB  
3:-. 06190 dB  
0. 000 000 MHz  
15. 100 000 MHz  
CH1 S21  
LOG  
10 dB/ REF -23.74 dB  
1: 0. 0000 dB  
0. 000 000 MHz  
CH1 Markers  
CH1 Markers  
REF=1  
REF=1  
BW: 15. 545701 MHz  
BW: 17. 102094 MHz  
1
2
cent  
:
74. 759787 MHz  
Q: 4. 8090  
Cor  
C
cent  
:
74. 774028 MHz  
Q: 4. 3722  
1_loss  
: -23 . 684 dB  
1
2
1_loss  
: -23 . 747 dB  
3
4
3
2
1
CH2 Markers  
REF=2  
3
4
Cor  
mean:-23 . 658 dB  
s. dev : . 08150 dB  
p-p : . 40310 dB  
CENTER 74. 760 000 MHz  
SPAN 20. 000 000 MHz  
CENTER 74. 760 000 MHz  
SPAN 55. 000 000 MHz  
3dB Bandwidth & Group Delay  
20dB Bandwidth  
17 May 2012 14:40:08  
17 May 2012 15:15:44  
1: 0. 0000 dB 0. 000 000 MHz  
CH1 S21  
CH2 S21  
LOG  
DEL  
1 dB/ REF -23.49 dB  
100 ns/ REF 2.367 us  
1: 0. 0000 dB  
3:-11 . 902 ns  
0. 000 000 MHz  
15. 100 000 MHz  
CH1 S21  
LOG  
10 dB/ REF -23.74 dB  
CH1 Markers  
CH1 Markers  
REF=1  
REF=1  
BW: 15. 852374 MHz  
BW: 16. 727113 MHz  
1
2
cent  
:
74. 762157 MHz  
Q: 4. 7161  
Cor  
C
cent  
:
74. 773001 MHz  
Q: 4. 4702  
1_loss  
: -23 . 689 dB  
1
2
1_loss  
: -23 . 747 dB  
3
4
3
1
2
3
Smo  
Cor  
CH2 Markers  
REF=2  
4
mean: 2. 3013 us  
s. dev : 5. 3265 ns  
p-p  
: 26. 932 ns  
CENTER 74. 760 000 MHz  
SPAN 20. 000 000 MHz  
CENTER 74. 760 000 MHz  
SPAN 55. 000 000 MHz  
Wideband Properties  
SWR(S11 & S22)  
17 May 2012 14:43:37  
17 May 2012 14:41:43  
1: 6. 4473  
2: 7. 3838  
CH1 S21  
LOG  
10 dB/ REF -25.36 dB  
1: 0. 0000 dB  
0. 000 000 MHz  
CH1 S11  
CH2 S22  
SWR  
SWR  
10  
10  
/
/
REF 6.462  
REF 7.375  
74. 760 000 MHz  
74. 760 000 MHz  
CH1 Markers  
REF=1  
2:-54 . 789 dB  
74. 7600 MHz  
Cor  
3:-32 . 920 dB  
149. 520 MHz  
1
1
3
Cor  
2
2
START . 010 000 MHz  
STOP 300. 000 000 MHz  
CENTER 74. 760 000 MHz  
SPAN 55. 000 000 MHz  
I T F Co., Ltd.  
102ꢀ901, Bucheon Technopark 364, SamjeongꢀDong,  
OjeongꢀGu, BucheonꢀCity,  
Tel: 82-32-621-1213  
Fax: 82-32-621-1218  
http://www.itf.co.kr  
sales@itf.co.kr  
2013. 04. 01  
Rev 1.0  
GyounggiꢀDo, Korea 421ꢀ809