Data Sheet
Part Number 855942
770 MHz SAW Filter
Subject to change or obsolescence without notice
Rev A
11-Jul-2002
Page 1 of 5
Features
For WLAN applications
Usable bandwidth of 17 MHz
Low loss
High attenuation
No impedance matching required for operation
at 250
Balanced operation
Ceramic Surface Mount Package (SMP)
Small size
Package
Pin Configuration
Surface Mount 5.00 x 5.00 x 1.32 mm
Bottom View
4
8
7
6
5
3
2
1
Pin No.
Description
1,3
Balanced
Input
5,7
BalancedOutput
2,6
External
ground
8,4
Case
ground
1.32 NOM.
1.52 MAX.
0.66
1.27
1.27
0.64
2.08
5.00
5.00
Dimensions shown are nominal in millimeters
All tolerances are
0.15mm except overall
length and width +0.15/-0.10mm
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
Data Sheet
Part Number 855942
770 MHz SAW Filter
Subject to change or obsolescence without notice
Rev A
11-Jul-2002
Page 2 of 5
Electrical Specifications
(1)
Operating Temperature Range:
(2)
-10 to +70
o
C
Parameter
(3)
Minimum
Typical
Maximum
Unit
Center Frequency
- 770 -
MHz
Minimum Insertion Loss
- 3.0 4
dB
Amplitude Variation
761.5
-
778.5
MHz
-
1.876
3.5
dB p-p
Group Delay
761.5
-
778.5
MHz
-
50
60
nsec
Group Delay Ripple
761.5
-
778.5
MHz
-
23
100
nsec
Relative Attenuation
(4)
740 MHz
750 MHz
790 MHz
800 MHz
40
30
13
35
47
45
31
51
-
-
-
-
dB
dB
dB
dB
Minimum Rejection
(4)
1
-
370
MHz
370
-
740
MHz
800
-
1400
MHz
1400
-
2000
MHz
30
30
30
30
46
46.5
43.5
37.75
-
-
-
-
dB
dB
dB
dB
Source Impedance
(5)
- 250 -
Load Impedance
(5)
- 250 -
Notes:
1. All specifications are based on the test circuit shown 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 temperature drift and manufacturing tolerances
4. Referenced to insertion loss at 770 MHz
5. This is the optimum impedance in order to achieve the performance shown
Data Sheet
Part Number 855942
770 MHz SAW Filter
Subject to change or obsolescence without notice
Rev A
11-Jul-2002
Page 3 of 5
Typical Performance
(at +25
o
C)
Data Sheet
Part Number 855942
770 MHz SAW Filter
Subject to change or obsolescence without notice
Rev A
11-Jul-2002
Page 4 of 5
Matching Schematics
Actual matching values may vary due to PCB layout and parasitics
250
Balanced
2,4,6,8
1
5
250
250
3
7
Marking
PCB Footprint
Date code
3
JJJYM
ID dot
logo
Sawtek
code
Marking
1.47
5.20
2.28
.84
1.47
.84
.43
.71
The date code consists of: JJJ = Julian day,
Y = last digit of year, M = manufacturing site code
This footprint represents a recommendation only
Dimensions shown are nominal in millimeters
Tape and Reel
12.0
Section A-A
A
A
0.3
1.8
5.25
5.25
1.5
1.5
8.0
4.0
2.0
5.5
1.75
12.8
2.7
13.0
20.2
330
logo
Sawtek
ID dot
2.0
102
Direction of travel
Dimensions shown are nominal in millimeters
Packaging quantity: 4000 units/reel
Data Sheet
Part Number 855942
770 MHz SAW Filter
Subject to change or obsolescence without notice
Rev A
11-Jul-2002
Page 5 of 5
Maximum Ratings
Parameter
Symbol
Minimum
Maximum
Unit
Operating Temperature Range
T
-10
+70
o
C
Storage Temperature Range
T
stg
-40 +85
o
C
Warnings
Electrostatic Sensitive Device (ESD)
Avoid ultrasonic exposure
Links to Additional Technical Information
PCB Layout Tips
Qualification Flowchart
Soldering
Profile
(1)
S-Parameters
Other Technical Information
Notes:
1. Average ramp up rate 3
o
C/sec max
Temp maintained above 120
o
C 360 sec min
Temp maintained above 180
o
C 150 sec min
Peak at 235
5
o
C 30 sec min
Average ramp down rate 6
o
C/sec max
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
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