Data Sheet
Features
•
•
•
•
•
•
•
For WCDMA basestation IF applications
Usable bandwidth of 3.6 MHz
Low loss
High attenuation
Single-ended operation
Ceramic Surface Mount Package (SMP)
Small size
Part Number 855992
240 MHz SAW Filter
•
Package
Surface Mount 13.30 x 6.50 x 1.50 mm
Pin Configuration
Bottom View
1
2
3
4
5
1.50 NOM.
1.65 MAX.
0.64
10
13.3
1.80
1.91
9
8
7
6
6.50
R0.51
2.31
1.02
Pin No.
5
10
1,6
2,3,4
7,8,9
Description
RF output
RF input
Ground
Case ground
Case ground
Dimensions shown are nominal in millimeters
All tolerances are
±0.15mm
except overall
length and width
±0.10mm
Body:
Al
2
O
3
ceramic
Lid:
Kovar, Ni
plated
Terminations:
Au
plating 0.5 - 1.0µm,
over a 2 - 6µm
Ni
plating
Subject to change or obsolescence without notice
Rev C
09-Mar-2004
Page 1 of 5
Data Sheet
Operating Temperature Range:
(2)
-10 to +85
o
C
Part Number 855992
240 MHz SAW Filter
Electrical Specifications
(1)
Parameter
(3)
Center Frequency, f
0
Insertion Loss at Minimum
Maximum Insertion Loss
238.2 - 241.8 MHz
Lower 1 dB Point
(4)
Upper 1 dB Point
(4)
Amplitude Variation
238.2 - 241.8 MHz
Group Delay
238.2 - 241.8 MHz
Group Delay Ripple
238.2 - 241.8 MHz
Phase Ripple
238.2 - 241.8 MHz
Minimum Rejection
170 - 235 MHz
245 - 310 MHz
Attenuation
236.70 MHz
237.07 MHz
237.50 MHz
242.50 MHz
242.93 MHz
243.30 MHz
Input/Output VSWR
238.2 - 241.8 MHz
Source Impedance:
(5)
Load Impedance:
(5)
Notes:
1.
2.
3.
4.
5.
Minimum
-
12.5
12.5
-
241.8
-
1.59
-
-
40
40
35
25
12
12
25
35
-
-
-
Typical
240
14.3
14.8
238.10
241.94
0.5
1.69
0.060
2
45
42
49
58
28
22
42
49
1.5:1
50
50
Maximum
-
16.5
16.5
238.2
-
1
1.79
0.15
6
-
-
-
-
-
-
-
-
2.0:1
-
-
Unit
MHz
dB
dB
MHz
MHz
dB p-p
µsec
µsec
deg p-p
dB
dB
dB
dB
dB
dB
dB
dB
Ratio
Ω
Ω
All specifications are based on the test circuit shown on page 4
In production, devices will be tested at room temperature to a guardbanded specification to ensure electrical compliance over
temperature
Electrical margin has been built into the design to account for the variations due to temperature drift and manufacturing tolerances
Relative to minimum insertion loss
This is the optimum impedance in order to achieve the performance shown
Subject to change or obsolescence without notice
Rev C
09-Mar-2004
Page 2 of 5
Data Sheet
Part Number 855992
240 MHz SAW Filter
Typical Performance
(at +25
o
C)
Subject to change or obsolescence without notice
Rev C
09-Mar-2004
Page 3 of 5
Data Sheet
Actual matching values may vary due to PCB layout and parasitics
18nH
10
5
18nH
Part Number 855992
240 MHz SAW Filter
Matching Schematics
50Ω
Single-ended
50Ω
8nH
1,2,3,4
6,7,8,9
8nH
50Ω
Marking
PCB Footprint
8.84
SAWTEK
855992
XXXXXX
6.70
2.00
1.22
.69
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
24.8
2.7
Ø330
ID dot
0.3
2.0
4.0
Ø1.5
A
1.75
11.5
13.9
24
Ø102
Direction of travel
Ø20.2
Ø13.0
2.0
2.3
Section A-A
7.1
12.0
Ø1.5
A
Dimensions shown are nominal in millimeters
Packaging quantity: 2000 units/reel
Subject to change or obsolescence without notice
Rev C
09-Mar-2004
Page 4 of 5
Data Sheet
Maximum Ratings
Parameter
Operating Temperature Range
Part Number 855992
240 MHz SAW Filter
Symbol
T
Minimum
-10
Maximum
+85
Unit
o
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
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
Subject to change or obsolescence without notice
Rev C
09-Mar-2004
Page 5 of 5
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