Data Sheet
Part Number 855915
249.6 MHz SAW Filter
Subject to change or obsolescence without notice
Rev B
30-Oct-2002
Page 1 of 5
Features
For 3G applications
Usable bandwidth of 3.84 MHz
High attenuation
Single-ended operation at 50
Ceramic Surface Mount Package (SMP)
Small size
Package
Pin Configuration
Surface Mount 7.01 x 5.51 x 1.63 mm
Bottom View
12
11
10
4
5
6
8
9
7
3
2
1
Pin No.
Description
4
Output
10
Input
1,2,3,5,6
Case
Ground
7,8,9,11,12
Case
Ground
Dimensions shown are nominal in millimeters
All tolerances are
0.15mm except overall
length and width
0.13mm
Body: Al
2
O
3
ceramic
Lid: Kovar, Ni plated
Terminations: Au plating 0.5 - 1.0
m,
over a 2 - 6
m Ni plating
1.63 NOM.
1.78 MAX.
5.51
0.76
1.14
1.27
1.70
0.79
1.27
7.01
Data Sheet
Part Number 855915
249.6 MHz SAW Filter
Electrical Specifications
(1)
Temperature Range:
(2)
-10 to +80
o
C
Parameter
(3)
Minimum
Typical
Maximum
Unit
Center Frequency
- 249.6 -
MHz
Minimum Insertion Loss at 249.6 MHz
- 16.11
20
dB
1 dB Lower Frequency
(4)
1 dB Upper Frequency
1 dB Bandwidth
-
251.52
3.84
246.98
251.89
4.89
247.68
-
5
MHz
MHz
MHz
40 dB Lower Frequency
(4)
40 dB Upper Frequency
40 dB Bandwidth
244.1
-
-
244.27
254.41
10.14
-
255.1
11
MHz
MHz
MHz
Passband Ripple
247.68 - 251.52
MHz
-
0.22
1
dB p-p
Group Delay Variation
247.68 - 251.52
MHz
-
27.15
50
nsec
Input VSWR
247.68 - 251.52
MHz
-
1.25:1
2.10:1
-
Output VSWR
247.68 - 251.52
MHz
-
1.34:1
2.10:1
-
Relative Attenuation
(4)
10
-
234.6
MHz
264.6
-
450
MHz
45
45
63.5
55.63
-
-
dB
dB
Source Impedance
(5)
- 50 -
Load Impedance
(5)
- 50 -
Notes:
1. All specifications are based on the test circuit shown below
2. In production, devices will be tested at room temperature to a guardbanded specification to ensure electrical compliance over
temperature
3. Electrical margin has been built into the design to account for the variations due to manufacturing tolerances
4. The attenuation measurements are referenced to average insertion loss over passband
5. This is the optimum impedance in order to achieve the performance shown
Test Circuit:
Actual matching values may vary due to PCB layout and parasitics
50
Single-ended
1,2,3,5,6
7,8,9,11,12
50
27nH
10
4
120nH
50
10
82nH
110nH
82nH
6.8
Subject to change or obsolescence without notice
Rev B
30-Oct-2002
Page 2 of 5
Data Sheet
Part Number 855915
249.6 MHz SAW Filter
Subject to change or obsolescence without notice
Rev B
30-Oct-2002
Page 3 of 5
Typical Performance
(at +25
o
C)
Data Sheet
Matching Schematics
Actual matching values may vary due to PCB layout and parasitics
50
Single-ended
1,
7,8,
2,3,5,6
9,11,12
50
110nH
82nH
Marking
PCB Footprint
ID dot
XXXXXX
.99
7.21
The date code consists of: day of the current year (Julian,
3 digits), last digit of the year (1 digit) and hour (2 digits)
This footprint represents a recommendation only
Dimensions shown are nominal in millimeters
Tape and Reel
0.3
1.5
4.0
2.0
A
A
ID dot
2.0
13.0
20.2
330
16.8
2.7
Direction of travel
102
Dimensions shown are nominal in millimeters
Packaging quantity: 3000 units/reel
Part Number 855915
249.6 MHz SAW Filter
Subject to change or obsolescence without notice
Rev B
30-Oct-2002
Page 4 of 5
Section A-A
1.5
16.0
7.5
1.75
2.2
7.3
5.8
8.0
Date code
855915
SAWTEK
5.71
1.34
1.34
.99
.28
.28
27nH
10
4
120nH
50
6.8
10
82nH
Data Sheet
Part Number 855915
249.6 MHz SAW Filter
Maximum Ratings
Parameter
Symbol
Minimum
Maximum
Unit
Operating Temperature Range
T
-10
+80
o
C
Storage Temperature Range
T
stg
-40 +85
o
C
Input Power
P
in
- +15
dBm
Warnings
Electrostatic Sensitive Device (ESD)
Avoid ultrasonic exposure
Links to Additional Technical Information
PCB Layout Tips
Qualification Flowchart
S-Parameters
Sawtek's liability is limited only to the Surface Acoustic Wave (SAW) component(s) described in this data sheet. Sawtek does not accept any liability for
applications, processes, circuits or assemblies which are implemented using any Sawtek component described in this data sheet.
Contact Information
PO Box 609501
Orlando, FL 32860-9501
USA
Phone: +1 (407) 886-8860
Fax: +1 (407) 886-7061
Email:
custservice@sawtek.com
Web:
www.sawtek.com
Or contact one of our worldwide
network of
sales offices,
representatives or distributors
Soldering Profile
Other Technical Information
Subject to change or obsolescence without notice
Rev B
30-Oct-2002
Page 5 of 5
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