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©2008 by RF Monolithics, Inc.

SF1212D - 12/12/08

Electrical Characteristics

Electrical Connections

Characteristic

Sym

Notes

Min

Typ

Max

Units

Nominal 1 dB Center Frequency

1

452.5

MHz

Passband Insertion Loss

450.0 to 454.8 MHz

IL

1.8

2.8

dB

VSWR

450.0 to 454.8 MHz

1.4:1

2:1

Rejection

0.3 to 440.0 MHz

1, 2, 3

25

28

dB

460.0 to 465.0 MHz

30

49

465.0 to 1700 MHz

25

28

1700 - 2000 MHz

20

30

Operating Temperature Range

1-30

+85

°C

Source, single ended

50 ohm

Load, single ended

50 ohm

Case Style

SM3838-6 3.8 x 3.8 mm Nominal Footprint

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

641, YWWS

Standard Reel Quantity

Reel Size 7 Inch

1000 Pieces/Reel

Reel Size 13 Inch

3000 Pieces/Reel

Connection

Terminals

Port 1

2

Port 2

5

Case Ground

All others

SM3838-6

• CDMA 450 F-Band RF SAW Filter

• 3.8 x 3.8 x 1.4 mm Surface-mount Package

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

Absolute Maximum Ratings

Rating

Value

Units

Maximum Incident Power in Passband

+28

dBm

Maximum DC Voltage between any Two Terminals

30

VDC

Storage Temperature Range

-40 to +85

°C

Suitable for Lead-free Soldering - Maximum Soldering Profile

260°C for 30 s

452.5 MHz

SAW Filter

SF1212D

1.

Unless noted otherwise, all specifications apply over the operating temper-

ature 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.

"LRIP" or "L" after the part number indicates "low rate initial production"

and "ENG" or "E" indicates "engineering prototypes."

5.

The design, manufacturing process, and specifications of this filter are

subject to change.

6.

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.

7.

US and international patents may apply.

8.

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

trademarks of RF Monolithics, Inc.

Pb

CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.

Notes:

Preliminary