®

RF Monolithics, Inc.

Phone: (972) 233-2903

Fax: (972) 387-8148

E-mail: info@rfm.com

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RFM Europe

Phone: 44 1963 251383

Fax: 44 1963 251510

http://www.rfm.com

©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.

RO2073C-040103

Electrical Characteristics

Characteristic

Sym

Notes

Minimum

Typical

Maximum

Units

Frequency (+25 °C)

Absolute Frequency

2, 3, 4, 5

314.900

315.100

MHz

Tolerance from 315.0 MHz

∆f

C

±100

kHz

Insertion Loss

IL

2, 5, 6

1.6

2.5

dB

Quality Factor

Unloaded Q

10500

50W Loaded Q

1400

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

15.67

Ω

Motional Inductance

82.0

µH

Motional Capacitance

3.11

fF

Shunt Static Capacitance

5, 6, 9

3.31

pF

Test Fixture Shunt Inductance

2, 7

77.00

nH

Lid Symbolization

412 // YWWS

Standard Reel Quantity

Reel Size 7 Inch

500 Pieces / Reel

Reel Size 13 Inch

3000 Pieces / Reel

•

Ideal for 315 MHz Automotive-Keyless-Entry Transmitters

•

Very Low Series Resistance

•

Quartz Stability

•

Complies with Directive 2002/95/EC (RoHS)

The RO2073C 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 approx-

imately 315 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

315.0 MHz

SAW

Resonator

RO2073C

CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.

Notes:

1.

Aging may exceed the specification for prolonged temperatures above +65°C.

Typically, aging is greatest the first year after manufacture, decreasing in subse-

quent 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 govern-

ment 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 measured

8.

9.

This equivalent RLC model approximates resonator performance near the reso-

static (nonmotional) capacitance between the two terminals measured at low

frequency (10 MHz) with a capacitance meter. The measurement includes para-

sitic capacitance with "NC” pads unconnected. Case parasitic capacitance is

approximately 0.05 pF. Transducer parallel capacitance can by calculated as:

SM5050-8 Case

5 X 5

Pb