All specifications are based on the test circuit shown below
This specification is valid for room temperature only
o
Device will function over an operating temperature of -40 to 85 C, but may not meet the above ambient specification. Insertion loss
and frequency shift performance will change over temperature. See coefficient of temperature for frequency shift estimation.
Electrical margin has been built into the design to account for the variations due to manufacturing tolerances
Referenced to insertion loss at 479.75 MHz
Referenced to 100% of 1dB bandwidth
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
12pF
9
3
50Ω
50
Ω
Single-ended
50Ω
39pF
1,2,4,5,6,7
8,10,11,12
Subject to change or obsolescence without notice
Rev B
13-Oct-2005
Page 2 of 5
Data Sheet
Part Number 855271
479.75 MHz SAW Filter
Typical Performance
(at +25
o
C)
Subject to change or obsolescence without notice
Rev B
13-Oct-2005
Page 3 of 5
Data Sheet
Actual matching values may vary due to PCB layout and parasitics
12pF
9
3
Part Number 855271
479.75 MHz SAW Filter
Matching Schematics
50
Ω
Single-ended
50Ω
39pF
1,2,4,5,6,7
8,10,11,12
50Ω
Marking
1.34
PCB Footprint
.99
.28
1.34
.28
Date code
ID dot
SAWTEK
855271
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
13-Oct-2005
Page 4 of 5
Data Sheet
Parameter
Operating Temperature Range
Storage Temperature Range
Part Number 855271
479.75 MHz SAW Filter
Maximum Ratings
Symbol
T
T
stg
Minimum
-40
-40
Maximum
+85
+85
Unit
o
o
C
C
Important Notes
Warnings
•
•
•
•
Electrostatic Sensitive Device (ESD)
Avoid ultrasonic exposure
RoHS Compliance
This product complies with EU directive 2002/95/EC (RoHS)
Pb
Solderability
Compatible with JEDEC J-STD-020C
Pb-free
process,
260°C
peak reflow temperature
(see
soldering profile)
Links to Additional Technical Information
PCB Layout Tips
S-Parameters
Qualification Flowchart
RoHS Information
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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