Preliminary Data Sheet
Part Number 856187
374 MHz SAW Filter
Features
For WLAN applications
Usable bandwidth of 17 MHz
Low loss
High attenuation
Single-ended or balanced operation
Ceramic Surface Mount Package (SMP)
Small size
Package
Pin Configuration
Surface Mount 3.80 x 3.80 x 1.27 mm
Bottom View
4
8
7
6
5
3
2
1
Pin No. Description
1
Input
2
Input
return
5
Output
6
Output
return
3,4,7,8
Case
ground
1.27 NOM.
1.45 MAX.
0.61
1.00
0.60
1.27
3.80
3.80
1.50
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 - 1.0
m,
over a 2 - 6
m Ni plating
Subject to change or obsolescence without notice
Rev -
22-Nov-2002
Page 1 of 5
Preliminary Data Sheet
Part Number 856187
374 MHz SAW Filter
Electrical Specifications
(1)
Operating Temperature Range:
(2)
-10 to +80
o
C
Parameter
(3)
Minimum
Typical
Maximum
Unit
Center Frequency, f
0
- 374 -
MHz
Minimum Insertion Loss
- 3.0
5.0
dB
Lower 3 dB Bandedge
Upper 3 dB Bandedge
-
382.5
362
386
365.5
-
MHz
MHz
Absolute Attenuation
10
-
345
MHz
345
-
355
MHz
355
-
359
MHz
392.5
-
397
MHz
397
-
410
MHz
410 - 600 MHz
55
50
44
35
45
55
60
55
50
40
50
60
-
-
-
-
-
-
dB
dB
dB
dB
dB
dB
Amplitude Variation
367 - 381 MHz
-
1.0
1.5
dB p-p
Group Delay Variation
367 - 381 MHz
-
100
150
nsec p-p
Source Impedance
(4)
- 50 -
Load Impedance
(4)
- 50 -
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. This is the optimum impedance in order to achieve the performance shown
5. Sawtek's production specifications reflect the typical performance in a 50 ohm single-ended system. This filter can be used in both
single-ended and/or differential modes at each port. In addition, similar performance can be achieved in source and load
impedances ranging from 50 to 750 ohms.
Test Circuit:
50
Balanced
2,3,4,6,7,8
50
2pF
12nH
1
5
50
12nH
Subject to change or obsolescence without notice
Rev -
22-Nov-2002
Page 2 of 5
Preliminary Data Sheet
Part Number 856187
374 MHz SAW Filter
Typical Performance
(at +25
o
C)
Subject to change or obsolescence without notice
Rev -
22-Nov-2002
Page 3 of 5
Preliminary Data Sheet
Part Number 856187
374 MHz SAW Filter
Matching Schematics
Actual matching values may vary due to PCB layout and parasitics
750
Balanced
3,4,7,8
750
1
5
750
47nH
2
6
56nH
6pF
6pF
5pF
5pF
200
Balanced
3,4,7,8
200
1
5
200
47nH
2
6
33nH
10pF
10pF
15pF
15pF
50
Single-ended
2,3,4,6,7,8
50
2pF
12nH
1
5
50
12nH
Marking
PCB Footprint
Date code
code
Marking
K
JJJYM
ID dot
Sawtek
logo
4.01
.81
.46
1.19
.81
1.19
1.70
.41
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
Subject to change or obsolescence without notice
Rev -
22-Nov-2002
Page 4 of 5
Preliminary Data Sheet
Part Number 856187
374 MHz SAW Filter
Tape and Reel
1.5
2.0
0.3
8.0
4.0
4.1
4.1
1.8
1.75
5.5
12.0
1.5
A
A
Section A-A
330
ID dot
logo
Sawtek
Direction of travel
2.0
13.0
20.2
2.7
12.8
102
Dimensions shown are nominal in millimeters
Packaging quantity: 4000 units/reel
Maximum Ratings
Parameter
Symbol
Minimum
Maximum
Unit
Operating Temperature Range
T
-10
+80
o
C
Input Power
(1)
P
in
- +7.5
dBm
Notes:
1. CW at Fo = 374 MHz for 10,000 hours
Warnings
Electrostatic Sensitive Device (ESD)
Avoid ultrasonic exposure
Links to Additional Technical Information
PCB Layout Tips
Qualification Flowchart
S-Parameters
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
Soldering Profile
Other Technical Information
Subject to change or obsolescence without notice
Rev -
22-Nov-2002
Page 5 of 5
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