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Data Sheet
Features
* * * * * For wireless applications Usable bandwidth of 20 MHz High attenuation Single-ended operation at 50 Ceramic Surface Mount Package (SMP)
Part Number 855272 479.75 MHz SAW Filter
*
Package
Surface Mount 7.01 x 5.51 x 1.63 mm
Pin Configuration
Bottom View
1 2 3
12
0.76 1.63 NOM. 1.78 MAX.
4 5 6
11 10
7.01 1.27
9
8
7
1.70 5.51
1.27
0.79
1.14
Pin No. 3 9 8,2 1,4,5,6,7 10,11,12
Description Output Input NC Case Ground Case Ground
Dimensions shown are nominal in millimeters All tolerances are 0.15mm except overall length and width 0.13mm Body: Al2O3 ceramic Lid: Kovar, Ni plated Terminations: Au plating 0.5 - 1.0m, over a 2 - 6m Ni plating
Subject to change or obsolescence without notice
Rev -
07-Apr-2003
Page 1 of 5
Data Sheet
Operating Temperature: (2) +25 oC
Part Number 855272 479.75 MHz SAW Filter
Electrical Specifications (1)
Parameter (3)
Center Frequency Insertion Loss 1 dB Bandwidth 3 dB Bandwidth 30 dB Bandwidth 35 dB Bandwidth Passband Variation Group Delay Variation Source Impedance (4) Load Impedance (4) Temperature Coefficient of Frequency Notes:
1. 2. 3. 4.
Minimum
479.25 23 -
Typical
479.75 9.8 23.3 25.5 33 33.9 0.75 25 50 50 -90
Maximum
480.25 13 36 1.5 50 -
Unit
MHz dB MHz MHz MHz MHz dB p-p nsec ppm/oC
All specifications are based on the test circuit shown below This specification is valid for room temperature only Electrical margin has been built into the design to account for the variations due to manufacturing tolerances 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
4pF 3nH 9 3 3nH
50 Single-ended
50
8pF
1,2,4,5,6 7,8,10,11,12
3pF
50
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 +25oC)
Subject to change or obsolescence without notice
Rev -
07-Apr-2003
Page 3 of 5
Data Sheet
Actual matching values may vary due to PCB layout and parasitics
4pF 3nH 9 3
Part Number 855272 479.75 MHz SAW Filter
Matching Schematics
3nH
50 Single-ended
50
8pF
1,2,4,5,6 7,8,10,11,12
3pF
50
Marking
1.34
PCB Footprint
.99 .28 1.34 .28
Date code
ID dot
SAWTEK 855272 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 O330 ID dot
0.3 2.0 4.0 O1.5
A
1.75 7.5
7.3
16.0
O102
Direction of travel O20.2 O13.0 2.0
2.2 Section A-A 5.8 8.0 O1.5
A
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
Parameter
Operating Temperature Range Storage Temperature Range
Part Number 855272 479.75 MHz SAW Filter
Maximum Ratings
Symbol
T Tstg
Minimum
-40
Typical +25 +25
Maximum
+85
Unit
o o
C C
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.
Contact Information
PO Box 609501 Orlando, FL 32860-9501 USA
Subject to change or obsolescence without notice
Phone: +1 (407) 886-8860 Fax: +1 (407) 886-7061 Email: custservice@sawtek.com Web: www.sawtek.com
Rev -
Or contact one of our worldwide network of sales offices, representatives or distributors
07-Apr-2003
Page 5 of 5

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