B39431B3780Z810 EPCOS Inc, B39431B3780Z810 Datasheet - Page 5
![FILTER SAW 433.92MHZ SMD](/photos/6/26/62674/b39431b3780z810_sml.jpg)
B39431B3780Z810
Manufacturer Part Number
B39431B3780Z810
Description
FILTER SAW 433.92MHZ SMD
Manufacturer
EPCOS Inc
Series
B3780r
Datasheet
1.B39431B3780Z810.pdf
(9 pages)
Specifications of B39431B3780Z810
Frequency
433.92MHz Center
Package / Case
0.150" L x 0.150" W x 0.059" H (3.80mm x 3.80mm x 1.50mm)
Bandwidth
140kHz
Insertion Loss
2dB
Filter Type
Bandpass
Applications
Remote Control
Mounting Type
Surface Mount
Product
RF SAW Filters
Frequency Range
433.645 MHz to 434.165 MHz
Impedance
50 Ohms
Operating Temperature Range
- 40 C to + 105 C
Voltage Rating
6 Volts
Termination Style
SMD/SMT
Saw Filter Type
Low-Loss Filter
3db Bandwidth
920KHz
Center Frequency
433.92MHz
Pass Band Ripple (db)
3dB
Termination Impedance
50Ohm
Package Type
QCC8B
Case Height
1.5mm
Case Length
3.8mm
Case Depth
3.8mm
Mounting
Surface Mount
Pin Count
8
Operating Temp Range
-45C to 120C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
495-3694-2
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
B39431B3780Z810
Manufacturer:
EPCOS Inc
Quantity:
1 947
Data sheet
ESD protection of SAW filters
SAW filters are Electro Static Discharge sensitive devices. To reduce the probability of damages
caused by ESD, special matching topologies have to be applied.
In general, “ESD matching” has to be ensured at that filter port, where electrostatic discharge is
expected.
Electrostatic discharges predominantly appear at the antenna input of RF receivers. Therefore
only the input matching of the SAW filter has to be designed to short circuit or to block the ESD
pulse.
Below two figures show recommended “ESD matching” topologies.
Depending on the input impedance of the SAW filter and the source impedance, the needed
component values have to be determined from case to case.
Fig. 1 MLC varistor plus ESD matching
In cases where minor ESD occur, following simplified “ESD matching” topologies can be used
alternatively.
Fig. 3 shunt L – series L matching
Effectiveness of the applied ESD protection has to be checked according to relevant industry
standards or customer specific requirements.
For further information, please refer to EPCOS Application report:
“ESD protection for SAW filters”. This report can be found under www.epcos.com/rke. Click on
“data sheets” and then “Applications” under category “Further information”.
Please read cautions and warnings and
important notes at the end of this document.
SAW Components
SAW filter
Lp1
Ls2
Lp2
Ls3
to output
matching
to output
matching
5
Fig. 2 Suppressor diode plus ESD matching
Fig. 4 series C – shunt L matching
July 24, 2008
Dp1
Cs1
Lp2
Ls3
Lp2
433.92 MHz
B3780
to output
matching
to output
matching