Preliminary Data Sheet
Features
•
•
•
•
•
•
•
For broadband applications
Typical 3 dB bandwidth of 4.9 MHz
High attenuation
Single-ended operation
Ceramic Surface Mount Package (SMP)
Small size
Replaces Sawtek P/N 851551 (BW 3dB=4.5 MHz)
Part Number 855744
70 MHz SAW Filter
•
Package
Surface Mount 19.00 x 6.50 x 1.75 mm
Pin Configuration
Bottom View
1
2
3
4
5
1.75 NOM.
1.96 MAX.
0.76
10 9
8
7
6
19.0
1.80
1.91
R0.51
6.50
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 +0.15mm/-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 -
03-Apr-2002
Page 1 of 5
Preliminary Data Sheet
Operating Temperature Range:
(2)
0 to +70
o
C
Part Number 855744
70 MHz SAW Filter
Electrical Specifications
(1)
Parameter
(3)
Center Frequency
Minimum Insertion Loss
Lower 1 dB Bandedge
(4)
Upper 1 dB Bandedge
Lower 3 dB Bandedge
(4)
Upper 3 dB Bandedge
Lower 40 dB Bandedge
(4)
Upper 40 dB Bandedge
Amplitude Variation
67.9 - 72.1 MHz
Phase Linearity
67.9 - 72.1 MHz
Group Delay Variation
67.9 - 72.1 MHz
Absolute Delay
Relative Attenuation
(4)
10 - 58 MHz
58 - 65 MHz
75 - 82 MHz
82 - 124 MHz
124 - 140 MHz
140 - 200 MHz
Source Impedance
(5)
Load Impedance
(5)
Substrate Material
Temperature Coefficient of Frequency
Notes:
1.
2.
3.
4.
5.
All specifications are based on the matching schematic 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
All attenuation measurements are measured relative to minimum insertion loss
This is the optimum impedance in order to achieve the performance shown
Minimum
-
-
-
72.1
-
72.35
66.68
-
-
-
-
-
42.0
36.5
42.0
42.5
37.5
50.0
-
-
-
-
Typical
70
24.15
67.7
72.25
67.5
72.45
66.75
73.18
0.58
3.0
67.0
2.3
51
45
47
54
46
64
50
50
LiTaO
3
-23
Maximum
-
25.5
67.9
-
67.65
-
-
73.32
1.15
5.85
135
-
-
-
-
-
-
-
-
-
-
-
Unit
MHz
dB
MHz
MHz
MHz
MHz
MHz
MHz
dB p-p
deg p-p
nsec
µsec
dB
dB
dB
dB
dB
dB
Ω
Ω
-
ppm/
o
C
Subject to change or obsolescence without notice
Rev -
03-Apr-2002
Page 2 of 5
Preliminary Data Sheet
Part Number 855744
70 MHz SAW Filter
Typical Performance
(at +25
o
C)
Subject to change or obsolescence without notice
Rev -
03-Apr-2002
Page 3 of 5
Preliminary Data Sheet
Matching Schematic
Actual matching values may vary due to PCB layout and parasitics
680nH 89pF
10
5
33nH
Part Number 855744
70 MHz SAW Filter
50Ω
Single-ended
50Ω
1,2,3,4,6,7,8,9
50Ω
Marking
PCB Footprint
8.84
SAWTEK
855744
XXXXXX
ID Dot
Date Code
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
2.7
32.8
Ø330
ID dot
0.3
2.0
4.0
Ø1.5
R0.75
A 1.75
14.2
19.6
32.0
28.4
Ø102
Ø20.2
Ø13.0
2.0
0.20
Direction of travel
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 -
03-Apr-2002
Page 4 of 5
Preliminary Data Sheet
Maximum Ratings
Parameter
Operating Temperature Range
Storage Temperature Range
Part Number 855744
70 MHz SAW Filter
Symbol
T
T
stg
Minimum
0
-40
Typical
+25
-
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
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 -
03-Apr-2002
Page 5 of 5
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