Data Sheet
Part Number 855985
549.5 MHz SAW Filter
Subject to change or obsolescence without notice Rev B 02-Apr-2002 Page 1 of 5
Features
• For broadband applications
• Usable bandwidth 1 MHz
• Single-ended operation
• Ceramic Surface Mount Package (SMP)
• Small size
•
Package Pin Configuration
Surface Mount 9.00 x 7.01 x 1.50 mm Bottom View
5
4
10
9
876
3
2
1
11
Pin No. Description
4 Output
5 Output return
9 Input
10 Input return
1,2,3,6 Case ground
7,8,11 Case ground
0.76
9.00
2.54
2.54
1.12
1.02
7.01
1.80
1.50 NOM.
1.65 MAX.
1.02 x 2.54
Dimensions shown are nominal in millimeters
All tolerances are ±0.15mm except overall
length and width +0.10mm/-0.15mm
Body: Al2O3 ceramic
Lid: Kovar, Ni plated
Terminations: Au plating 0.5 - 1.0µm,
over a 2 - 6µm Ni plating
Data Sheet
Part Number 855985
549.5 MHz SAW Filter
Subject to change or obsolescence without notice Rev B 02-Apr-2002 Page 2 of 5
Electrical Specifications (1)
Operating Temperature Range: (2) -10 to +65 oC
Parameter (3) Minimum Typical Maximum Unit
Center Frequency - 549.5 - MHz
Insertion Loss at 549.5 MHz - 11.6 13 dB
Lower 1 dB Bandwidth (4)
Upper 1 dB Bandwidth
-
550
548.73
550.41
549
-
MHz
MHz
3 dB Bandwidth (4) - 1.99 2.2 MHz
Lower 40 dB Bandwidth (4)
Upper 40 dB Bandwidth
547.4
-
547.83
551.08
-
551.6
MHz
MHz
Amplitude Variation
549 - 550 MHz
-
0.5
1
dB p-p
Phase Ripple (5)
549 - 550 MHz
-
0.81
5
deg p-p
Group Delay Ripple
549 - 550 MHz
-
80
150
ns
Absolute Attenuation
10 - 250 MHz
250 - 536.5 MHz
536.5 - 547.4 MHz
551.6 - 562.5 MHz
562.5 - 2000 MHz
50
40
40
37
40
70
49
43
40
50
-
-
-
-
-
dB
dB
dB
dB
dB
Input/Output VSWR
549 - 550 MHz
-
1.3:1
2:1
-
Source Impedance: (6) - 50 -
Ω
Load Impedance: (6) - 50 -
Ω
Notes:
1. All specifications are based on the test circuit shown below
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 temperature drift and manufacturing tolerances
4. Relative to insertion loss at 549.5 MHz
5. Sliding aperture of 0.2 MHz
6. 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 Ω
Single-ended
1,2,3,5,6
7,8,10,11
50
Ω
15pF
10nH
94
2.8nH
50
Ω
6pF
12pF
Data Sheet
Part Number 855985
549.5 MHz SAW Filter
Subject to change or obsolescence without notice Rev B 02-Apr-2002 Page 3 of 5
Typical Performance (at +25oC)
Data Sheet
Part Number 855985
549.5 MHz SAW Filter
Subject to change or obsolescence without notice Rev B 02-Apr-2002 Page 4 of 5
Matching Schematics
Actual matching values may vary due to PCB layout and parasitics
50 Ω
Single-ended
1,2,3,5,6
7,8,10,11
50
Ω
15pF
10nH
94
2.8nH
50
Ω
6pF
12pF
Marking PCB Footprint
Date code
ID dot
SAWTEK
XXXXXX
855985
1.22
7.21 2.74
1.22
9.19
1.32
1.32
3.76
1.32
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
A
A
Ø1.5
12.0
4.0 Ø1.5
2.0
9.22
7.22
2.2
Section A-A
0.3
16.0
7.5
1.75
Ø13.0
Ø20.2
Ø102
Ø330
16.8
2.7
ID dot
Direction of travel
2.0
Dimensions shown are nominal in millimeters
Packaging quantity: 2000 units/reel
Data Sheet
Part Number 855985
549.5 MHz SAW Filter
Subject to change or obsolescence without notice Rev B 02-Apr-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
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
