Data Sheet
Part Number 855272
479.75 MHz SAW Filter
Features
For wireless applications
Usable bandwidth of 20 MHz
High attenuation
Single-ended operation at 50
Ceramic Surface Mount Package (SMP)
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
3
Output
9
Input
8,2
NC
1,4,5,6,7
Case
Ground
10,11,12
Case
Ground
1.63 NOM.
1.78 MAX.
5.51
0.76
1.14
1.27
1.70
0.79
1.27
7.01
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
Subject to change or obsolescence without notice
Rev -
07-Apr-2003
Page 1 of 5
Data Sheet
Part Number 855272
479.75 MHz SAW Filter
Electrical Specifications
(1)
Operating Temperature:
(2)
+25
o
C
Parameter
(3)
Minimum
Typical
Maximum
Unit
Center Frequency
479.25 479.75 480.25
MHz
Insertion Loss
- 9.8
13
dB
1 dB Bandwidth
- 23.3 -
MHz
3 dB Bandwidth
23 25.5 -
MHz
30 dB Bandwidth
- 33 -
MHz
35 dB Bandwidth
- 33.9
36
MHz
Passband Variation
- 0.75
1.5
dB
p-p
Group Delay Variation
- 25
50
nsec
Source Impedance
(4)
- 50 -
Load Impedance
(4)
- 50 -
Temperature Coefficient of Frequency
- -90 -
ppm/
o
C
Notes:
1. All specifications are based on the test circuit shown below
2. This specification is valid for room temperature only
3. Electrical margin has been built into the design to account for the variations due to manufacturing tolerances
4. 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
1,2,4,5,6
7,8,10,11,12
50
8pF
3nH
9
3
3nH
50
4pF
3pF
Subject to change or obsolescence without notice
Rev -
07-Apr-2003
Page 2 of 5
Data Sheet
Part Number 855272
479.75 MHz SAW Filter
Typical Performance
(at +25
o
C)
Subject to change or obsolescence without notice
Rev -
07-Apr-2003
Page 3 of 5
Data Sheet
Part Number 855272
479.75 MHz SAW Filter
Matching Schematics
Actual matching values may vary due to PCB layout and parasitics
50
Single-ended
1,2,4,5,6
7,8,10,11,12
50
8pF
3nH
9
3
3nH
50
4pF
3pF
Marking
PCB Footprint
Date code
855272
SAWTEK
ID dot
XXXXXX
5.71
.99
7.21
1.34
1.34
.99
.28
.28
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
Section A-A
0.3
2.2
7.3
5.8
1.5
8.0
4.0
2.0
A
A
1.5
16.0
7.5
1.75
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
Subject to change or obsolescence without notice
Rev -
07-Apr-2003
Page 4 of 5
Data Sheet
Part Number 855272
479.75 MHz SAW Filter
Maximum Ratings
Parameter
Symbol Minimum
Typical
Maximum
Unit
Operating Temperature Range
T
-
+25
-
o
C
Storage Temperature Range
T
stg
-40 +25
+85
o
C
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 -
07-Apr-2003
Page 5 of 5
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