Data Sheet
Part Number 855742
70 MHz SAW Filter
Subject to change or obsolescence without notice
Rev A
01-Feb-2002
Page 1 of 5
Features
For broadband applications
Typical 3dB bandwidth of 3.8 MHz
High attenuation
Single-ended operation
Ceramic Surface Mount Package (SMP)
Small size
Replaces Sawtek Part 851549 (BW 3dB=3.5MHz)
Package
Pin Configuration
Surface Mount 15.3 x 6.50 x 1.50 mm
Bottom View
6
7
9
8
10
5
4
3
2
1
Pin No.
Description
5
Output
10
Input
1,6
Ground
2,3,4,7,8,9
Case
ground
1.50 NOM.
1.65 MAX.
1.80
6.50
1.02
0.64
2.31
15.3
1.91
R0.51
Dimensions shown are nominal in millimeters
All tolerances are
0.15mm except overall
length and width +0.15mm/-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 855742
70 MHz SAW Filter
Subject to change or obsolescence without notice
Rev A
01-Feb-2002
Page 2 of 5
Electrical Specifications
(1)
Operating Temperature Range:
(2)
0 to +70
o
C
Parameter
(3)
Minimum
Typical
Maximum
Unit
Center Frequency
- 70 -
MHz
Minimum Insertion Loss
- 19 22
dB
Lower 1 dB Bandedge
(4)
Upper 1 dB Bandedge
-
71.4
68.35
71.68
68.6
-
MHz
MHz
Lower 3 dB Bandedge
(4)
Upper 3 dB Bandedge
-
71.8
68.12
71.92
68.2
-
MHz
MHz
Lower 40 dB Bandedge
(4)
Upper 40 dB Bandedge
67
-
67.31
72.75
-
73
MHz
MHz
Amplitude Variation
68.6
-
71.4
MHz
-
0.6
1
dB p-p
Phase Linearity
68.6
-
71.4
MHz
-
3.5
6
deg p-p
Group Delay Variation
68.6
-
71.4
MHz
-
84
150
nsec
Absolute Delay
- 2.03 -
sec
Relative Attenuation
(4)
10
-
30
MHz
30
-
66.7
MHz
73.3
-
110
MHz
110
-
200
MHz
50
44
40
50
58
49
46
60
-
-
-
-
dB
dB
dB
dB
Source Impedance:
(5)
- 50
Load Impedance:
(5)
- 50
Substrate Material
- LiTaO
3
- -
Temperature Coefficient of Frequency
- -23 -
ppm/
o
C
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. All attenuation measurements are measured relative to minimum insertion loss
5. 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
Single-ended
1,2,3,4
6,7,8,9
50
33pF
120nH
10
5
82nH
50
12pF
270nH
Data Sheet
Part Number 855742
70 MHz SAW Filter
Subject to change or obsolescence without notice
Rev A
01-Feb-2002
Page 3 of 5
Typical Performance
(at +25
o
C)
Data Sheet
Part Number 855742
70 MHz SAW Filter
Subject to change or obsolescence without notice
Rev A
01-Feb-2002
Page 4 of 5
Matching Schematics
Actual matching values may vary due to PCB layout and parasitics
50
Single-ended
1,2,3,4
6,7,8,9
50
33pF
120nH
10
5
82nH
50
12pF
270nH
Marking
PCB Footprint
XXXXXX
Date code
ID dot
SAWTEK
855742
6.70
2.00
1.22
8.84
.69
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
A
A
Section A-A
0.3
2.3
16.0
7.1
1.5
1.5
12.0
4.0
2.0
24
11.5
1.75
330
2.0
13.0
20.2
102
2.7
24.8
ID dot
Direction of travel
Dimensions shown are nominal in millimeters
Packaging quantity: 2000 units/reel
Data Sheet
Part Number 855742
70 MHz SAW Filter
Subject to change or obsolescence without notice
Rev A
01-Feb-2002
Page 5 of 5
Maximum Ratings
Parameter
Symbol
Minimum
Typical
Maximum
Unit
Operating Temperature Range
T
0
+25
+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
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
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