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©2009 by RF Monolithics, Inc.

SF2139D - 7/9/09

SM3838-6

• Low Insertion Loss

• 3.8 X 3.8 X 1.0 mm Surface Mount Case

• Complies with Directive 2002/95/EC (RoHS)

Absolute Maximum Ratings

Rating

Value

Units

Maximum Incident Power in Passband

+10

dBm

Maximum DC Voltage Between any Two Terminals

30

VDC

Storage Temperature Range in Tape and Reel

-40 to +85

°C

Suitable for Lead-free Soldering - Maximum Soldering Profile

260 °C for 30 s

177.0 MHz

SAW Filter

SF2139D

1.

Unless noted otherwise, all specifications apply over the operating temperature range with filter soldered to the specified demonstration board with impedance

matching to 50

Ω and measured with 50 Ω network analyzer.

2.

Unless noted otherwise, all frequency specifications are referenced to the nominal center frequency, fc.

3.

Rejection is measured as attenuation below the minimum IL point in the passband. Rejection in final user application is dependent on PCB layout and external

impedance matching design. See Application Note No. 42 for details.

4.

The design, manufacturing process, and specifications of this filter are subject to change.

5.

Either Port 1 or Port 2 may be used for either input or output in the design. However, impedances and impedance matching may vary between Port 1 and Port

2, so that the filter must always be installed in one direction per the circuit design.

6.

US and international patents may apply.

7.

RFM, stylized RFM logo, and RF Monolithics, Inc. are registered trademarks of RF Monolithics, Inc.

Pb

Electrical Characteristics

Characteristic

Sym

Notes

Min

Typ

Max

Units

Center Frequency

1

177

MHz

Source Impedance, Single Ended

50

Ω

Load Impedance, Single Ended

50

Ω

1 dB Bandwidth

20

23.8

MHz

40 dB Bandwidth

40

60

MHz

Template on the Amplitude,

10 to 149 MHz

38

40

dB

Reference is Minimum IL

209 to 350 MHz

37

39

Maximum Insertion Loss

7.0

9.0

dB

Amplitude Variation over 20 MHz Passband

1.1

1.5

Group Delay Variation over 20 MHz Passband

15

80

0.308

µs

Input/Output Return loss over 20 MHz Passband

5

7

dB

Operating Temperature

-40

+85

°C

Case Style

SM3838-6 3.8 x 3.8 mm Nominal Footprint

Lid Symbolization (Y=year, WW=week, S=shift) dot=pin 1 indicator

TBD, YWWS

Standard Reel Quantity

Reel Size 7 Inch

1000 Pieces/Reel

Reel Size 13 Inch

3000 Pieces/Reel

CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.

Notes:

Preliminary