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©2008 by RF Monolithics, Inc.

RO3104C - 3/26/08

Electrical Characteristics

Characteristic

Sym

Notes

Minimum

Typical

Maximum

Units

Frequency (+25 °C)

Absolute Frequency

2, 3, 4, 5

303.750

303.900

MHz

Tolerance from 303.825 MHz

±75

kHz

Insertion Loss

IL

2, 5, 6

1.3

2.0

dB

Quality Factor

Unloaded Q

9800

50W Loaded Q

1300

Temperature Stability

Turnover Temperature

6, 7, 8

10

25

40

°C

Turnover Frequency

Frequency Temperature Coefficient

FTC

0.032

Frequency Aging

Absolute Value during the First Year

1, 6

10

ppm/yr

DC Insulation Resistance between Any Two Terminals

5

1.0

M

Ω

RF Equivalent RLC Model

Motional Resistance

5, 7, 9

15.6

Ω

Motional Inductance

79.7

µH

Motional Capacitance

3.4

fF

Shunt Static Capacitance

5, 6, 9

3.3

pF

Test Fixture Shunt Inductance

2, 7

83.9

nH

Lid Symbolization

688 // YWWS

Standard Reel Quantity

Reel Size 7 Inch

500 Pieces / Reel

Reel Size 13 Inch

3000 Pieces / Reel

• Ideal for 303.825 MHz Transmitters

• Very Low Series Resistance

• Quartz Stability

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

The RO3104C is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount, ceramic case.

It provides reliable, fundamental-mode, quartz frequency stabilization of local oscillators operating at

approximately 303.825 MHz. This SAW was designed for AM transmitters in automotive-keyless-entry

applications operating in the USA under FCC Part 15, in Canada under DoC RSS-210, and in Italy.

Absolute Maximum Ratings

Rating

Value

Units

Input Power Level

0

dBm

DC Voltage

12

VDC

Storage Temperature

-40 to +85

°C

Soldering Temperature (10 seconds / 5 cycles max.)

260

°C

303.825 MHz

SAW

Resonator

RO3104C

CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.

Notes:

1.

less. Aging may exceed the specification for prolonged temperatures

above +65°C. Typically, aging is greatest the first year after manufacture,

decreasing in subsequent years.

2.

3.

One or more of the following United States patents apply: 4,454,488 and

4,616,197.

4.

Typically, equipment utilizing this device requires emissions testing and

government approval, which is the responsibility of the equipment

manufacturer.

5.

6.

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

subject to change without notice.

7.

Derived mathematically from one or more of the following directly

8.

9.

This equivalent RLC model approximates resonator performance near the

is the static (nonmotional) capacitance between the two terminals

measured at low frequency (10 MHz) with a capacitance meter. The

measurement includes parasitic capacitance with "NC” pads unconnected.

Case parasitic capacitance is approximately 0.05 pF. Transducer parallel

SM5050-8 Case

5 X 5

Pb