Preliminary Data Sheet
Part Number 856278
374 MHz SAW Filter
Features
For WLAN applications
Usable bandwidth of 17 MHz
Balanced or single-ended 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
2
Input
3
Input
return
6
Output
7
Output
return
1,4,5,8
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 A
15-Aug-2003
Page 1 of 5
Preliminary Data Sheet
Part Number 856278
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
Maximum Insertion Loss
367 - 381 MHz
-
9
10
dB
Lower 3 dB Bandedge
Upper 3 dB Bandedge
-
382.5
363.5
384.5
365.5
-
MHz
MHz
Stop Band Rejection
(4)
274
-
331
MHz
331
-
352
MHz
352
-
357.5
MHz
390.5
-
396
MHz
396
-
404
MHz
404
-
417
MHz
417 - 474 MHz
45
40
30
30
35
40
40
50
45
35
35
41
45
45
-
-
-
-
-
-
-
dB
dB
dB
dB
dB
dB
dB
Amplitude Variation
(5)
367 - 381 MHz
-
0.75
1.0
dB
Group Delay Variation
(5)
367
-
381
MHz
40
100
nsec
Triple Transit Suppression
30 40 -
dB
Source Impedance
(6)
- 200 -
Load Impedance
(6)
- 200 -
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 measured over the defined frequency range and referenced to minimum insertion loss
5. Total variation over the defined range
6. 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
200
Balanced
1,4,5,8
200
18pF
27nH
18pF
22pf
22pf
2
3
6
7
15nH
200
Subject to change or obsolescence without notice
Rev A
15-Aug-2003
Page 2 of 5
Preliminary Data Sheet
Part Number 856278
374 MHz SAW Filter
Typical Performance
(at +25
o
C)
Subject to change or obsolescence without notice
Rev A
15-Aug-2003
Page 3 of 5
Preliminary Data Sheet
Part Number 856278
374 MHz SAW Filter
Matching Schematics
Actual matching values may vary due to PCB layout and parasitics
50
Single-ended
1,3,4,5,7,8
50
18nH
2
6
50
10nH
6pf
18pf
750
Balanced
1,4,5,8
750
9pF
36nH
9pF
12pf
12pf
2
3
6
7
24nH
750
Marking
PCB Footprint
Date code
code
Marking
P
JJJYM
ID dot
Sawtek
logo
4.01
.81
.46
1.19
.81
1.19
1.70
.41
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
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
Direction of travel
102
13.0
20.2
330
2.7
12.8
2.0
logo
Sawtek
ID dot
Dimensions shown are nominal in millimeters
Packaging quantity: 4000 units/reel
Subject to change or obsolescence without notice
Rev A
15-Aug-2003
Page 4 of 5
Preliminary Data Sheet
Part Number 856278
374 MHz SAW Filter
Maximum Ratings
Parameter
Symbol
Minimum
Maximum
Unit
Operating Temperature Range
T
-10
+85
o
C
Storage Temperature Range
T
stg
-40 +85
o
C
Input Power
P
in
- +10
dBm
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 A
15-Aug-2003
Page 5 of 5
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