All specifications are based on the test circuit shown below
In production, devices will be tested at room temperature to a guardbanded specification to ensure electrical compliance over
temperature
Electrical margin has been built into the design to account for the variations due to manufacturing tolerances
The attenuation measurements are referenced to average insertion loss over passband
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
10
Ω
110nH 27nH
10
4
82nH
50Ω
120nH
6.8Ω
50
Ω
Single-ended
50Ω
82nH
1,2,3,5,6
7,8,9,11,12
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
Typical Performance
(at +25
o
C)
Subject to change or obsolescence without notice
Rev B
30-Oct-2002
Page 3 of 5
Data Sheet
Actual matching values may vary due to PCB layout and parasitics
10
Ω
110nH 27nH
10
4
82nH
Part Number 855915
249.6 MHz SAW Filter
Matching Schematics
120nH
6.8Ω
50
Ω
Single-ended
50Ω
82nH
1,2,3,5,6
7,8,9,11,12
50Ω
Marking
1.34
PCB Footprint
.99
.28
1.34
.28
Date code
ID dot
SAWTEK
855915
XXXXXX
5.71
.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
2.7
16.8
Ø330
ID dot
0.3
2.0
4.0
Ø1.5
A
1.75
7.5
7.3
16.0
Ø102
Direction of travel
Ø20.2
Ø13.0
2.0
2.2
Section A-A
5.8
8.0
Ø1.5
A
Dimensions shown are nominal in millimeters
Packaging quantity: 3000 units/reel
Subject to change or obsolescence without notice
Rev B
30-Oct-2002
Page 4 of 5
Data Sheet
Parameter
Operating Temperature Range
Storage Temperature Range
Input Power
Part Number 855915
249.6 MHz SAW Filter
Maximum Ratings
Symbol
T
T
stg
P
in
Minimum
-10
-40
-
Maximum
+80
+85
+15
Unit
C
C
dBm
o
o
Warnings
•
•
Electrostatic Sensitive Device (ESD)
Avoid ultrasonic exposure
Links to Additional Technical Information
PCB Layout Tips
S-Parameters
Qualification Flowchart
Soldering Profile
Other Technical Information
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.
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