Preliminary Data Sheet
Features
•
•
•
•
•
•
•
•
For WLAN applications
Usable bandwidth of 17 MHz
Low loss
High attenuation
No impedance matching required for operation
at 250
Ω
Balanced operation
Ceramic Surface Mount Package (SMP)
Small size
Part Number 855942
770 MHz SAW Filter
•
Package
Surface Mount 5.00 x 5.00 x 1.32 mm
Pin Configuration
Bottom View
1
2
3
1.32 NOM.
1.52 MAX.
5.00
1.27
0.66
8
4
7
6
5
5.00
1.27
Pin No.
1,3
5,7
2,6
8,4
Description
Balanced Input
BalancedOutput
External ground
Case ground
2.08
0.64
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 - 1.0µm,
over a 2 - 6µm
Ni
plating
Subject to change or obsolescence without notice
Rev -
27-Nov-2001
Page 1 of 5
Preliminary Data Sheet
Operating Temperature Range:
(2)
-10 to +70
o
C
Part Number 855942
770 MHz SAW Filter
Electrical Specifications
(1)
Parameter
(3)
Center Frequency
Minimum Insertion Loss
Amplitude Variation
761.5 - 778.5 MHz
Amplitude Ripple
761.5 - 778.5 MHz
Group Delay
761.5 - 778.5 MHz
Group Delay Ripple
761.5 - 778.5 MHz
Absolute Attenuation
(4)
740 MHz
750 MHz
790 MHz
800 MHz
Minimum Rejection
(4)
1 - 370 MHz
370 - 740 MHz
800 - 1400 MHz
1400 - 2000 MHz
Source Impedance:
(5)
Load Impedance:
(5)
Notes:
1.
2.
3.
4.
5.
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
Referenced to insertion loss at 770 MHz
This is the optimum impedance in order to achieve the performance shown
Minimum
-
-
-
-
-
-
40
30
13
35
30
30
30
30
-
-
Typical
770
3.0
1.876
1.34
50
23
47
45
31
51
46
46.5
43.5
37.75
250
250
Maximum
-
4
3.5
3.0
60
100
-
-
-
-
-
-
-
-
-
-
Unit
MHz
dB
dB p-p
dB p-p
nsec
nsec
MHz
MHz
MHz
MHz
dB
dB
dB
dB
Ω
Ω
Subject to change or obsolescence without notice
Rev -
27-Nov-2001
Page 2 of 5
Preliminary Data Sheet
Part Number 855942
770 MHz SAW Filter
Typical Performance
(at +25
o
C)
Subject to change or obsolescence without notice
Rev -
27-Nov-2001
Page 3 of 5
Preliminary Data Sheet
Actual matching values may vary due to PCB layout and parasitics
1
5
Part Number 855942
770 MHz SAW Filter
Matching Schematics
250Ω
Balanced
250
Ω
3
2,4,6,8
7
250
Ω
Marking
2.28
Sawtek
logo
Marking
code
PCB Footprint
5.20
1.47
3
JJJYM
.84
.71
ID dot
Date code
.43
.84
1.47
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
2.7
12.8
Ø330
Sawtek
logo
0.3
2.0
4.0
Ø1.5
A
1.75
5.5
5.25
1.8
Section A-A
5.25
8.0
Ø1.5
A
ID dot
Ø102
Direction of travel
12.0
Ø20.2
Ø13.0
2.0
Dimensions shown are nominal in millimeters
Packaging quantity: 4000 units/reel
Subject to change or obsolescence without notice
Rev -
27-Nov-2001
Page 4 of 5
Preliminary Data Sheet
Maximum Ratings
Parameter
Operating Temperature Range
Storage Temperature Range
Part Number 855942
770 MHz SAW Filter
Symbol
T
T
stg
Minimum
-10
-40
Maximum
+70
+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
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
27-Nov-2001
Page 5 of 5
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