Data Sheet
Part Number 855959
549.5 MHz SAW Filter
Subject to change or obsolescence without notice Rev E 27-Aug-2002 Page 1 of 5
Features
• For wireless LAN applications
• Usable bandwidth of 10 MHz
• High attenuation
• Single-ended operation at 50Ω
• 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
89 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
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: Al2O3 ceramic
Lid: Kovar, Ni plated
Terminations: Au plating 0.5 - 1.0µm,
over a 2 - 6µm Ni plating
Data Sheet
Part Number 855959
549.5 MHz SAW Filter
Subject to change or obsolescence without notice Rev E 27-Aug-2002 Page 2 of 5
Electrical Specifications (1)
Temperature Range: (2) -10 to +65 oC
Parameter (3) Minimum Typical Maximum Unit
Center Frequency - 549.5 - MHz
Insertion Loss at 549.5 MHz - 11.8 14 dB
1 dB Lower Frequency (4)
1 dB Upper Frequency
-
554.5
542.6
556.4
544.5
-
MHz
MHz
3 dB Lower Frequency (4)
3 dB Upper Frequency
541
556
541.9
557.1
543
558
MHz
MHz
40 dB Lower Frequency (4)
40 dB Upper Frequency
536.5
-
539.2
560.3
-
562.5
MHz
MHz
Relative Attenuation (4)
10 - 523.5 MHz
523.5 - 536.5 MHz
562.5 - 575.5 MHz
575.5 - 2000 MHz
50
40
40
50
56
47
48
55
-
-
-
-
dB
dB
dB
dB
Passband Variation
544.5 - 554.5 MHz
-
0.26
1
dB p-p
Passband Variation (5)
544.5 - 554.5 MHz
-
0.25
0.8
dB p-p
Phase Ripple(5)
544.5 - 554.5 MHz (straight line fit)
-
1.9
5
deg p-p
Group Delay Variation
544.5 - 554.5 MHz
-
30
100
nsec
Input/Output VSWR
544.5 - 554.5 MHz
-
1.4
2
Triple Transit Level 35 42 - dB
Source Impedance (6) - 50 -
Ω
Load Impedance (6) - 50 -
Ω
Temperature Coefficient of Frequency - -23 -
ppm/oC
Notes:
1. All specifications are based on the matching schematic on page 4
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. Referenced to insertion loss at 549.5 MHz
5. Sliding aperture 2 MHz
6. This is the optimum impedance in order to achieve the performance shown
Data Sheet
Part Number 855959
549.5 MHz SAW Filter
Subject to change or obsolescence without notice Rev E 27-Aug-2002 Page 3 of 5
Typical Performance (at +25oC)
Data Sheet
Part Number 855959
549.5 MHz SAW Filter
Subject to change or obsolescence without notice Rev E 27-Aug-2002 Page 4 of 5
Test Circuit
Actual matching values may vary due to PCB layout and parasitics
50 Ω
Single-ended
1,2,3,5,6
7,8,9,11,12
50
Ω
4.7nH
10 4
7pF
50
Ω
8pF 7pF 7pF
Matching Schematics
Actual matching values may vary due to PCB layout and parasitics
50 Ω
Single-ended
1,2,3,5,6
7,8,9,11,12
50
Ω
15nH
10 4
50
Ω
9pF 16pF
Marking PCB Footprint
Date code
855959
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
Ø1.5
8.0
4.0
2.0 A
A
Ø1.5
16.0
7.5
1.75
ID dot
2.0
Ø13.0
Ø20.2
Ø330
16.8
2.7
Direction of travel
Ø102
Dimensions shown are nominal in millimeters
Packaging quantity: 3000 units/reel
Data Sheet
Part Number 855959
549.5 MHz SAW Filter
Subject to change or obsolescence without notice Rev E 27-Aug-2002 Page 5 of 5
Maximum Ratings
Parameter Symbol Minimum Maximum Unit
Operating Temperature Range T -10 +65 oC
Storage Temperature Range Tstg -40 +85
oC
Warnings
• Electrostatic Sensitive Device (ESD)
• Avoid ultrasonic exposure
Links to Additional Technical Information
PCB Layout Tips Qualification Flowchart Soldering Profile
S-Parameters 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
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
