®

RF Monolithics, Inc.

Phone: (972) 233-2903

Fax: (972) 387-9148

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.

RP1239-110499

Electrical Characteristics

Characteristic

Sym

Notes

Minimum

Typical

Maximum

Units

Center Frequency

Absolute Frequency

2, 3, 4, 5,

314.925

315.075

MHz

Tolerance from 315.000 MHz

∆f

C

±75

kHz

Insertion Loss

IL

2, 5, 6

5.3

8.5

dB

Quality Factor

Unloaded Q

5, 6, 7

18,000

50

Ω Loaded Q

8,100

Temperature Stability

Turnover Temperature

6, 7, 8

37

52

67

°C

Turnover Frequency

kHz

Frequency Temp. Coefficient

FTC

0.037

Frequency Aging

Absolute Value during First Year

6

≤ 10

ppm/yr

DC Insulation Resistance between Any Two Pins

5

1.0

M

Ω

RF Equivalent RLC

Motional Resistance

5, 7, 9

84

167

Ω

Motional Inductance

758.027

µH

Motional Capacitance

0.336771

fF

Shunt Static Capacitance

5, 6, 9

1.9

2.2

2.5

pF

Lid Symbolization (in addition to Lot and/or Date Codes)

RFM P1239

TO39-3 Case

•

Designed for 315 MHz Transmitters

•

Nominal Insertion Phase Shift of 180° at Resonance

•

Quartz Stability

•

Rugged, Hermetic, Low-Profile TO39 Case

The RP1239 is a two-port, 180° surface-acoustic-wave (SAW) resonator in a low-profile TO39 case. It pro-

vides reliable, fundamental-mode, quartz frequency stabilization of low-power AM and FSK transmitters

operating at 315.0 MHz for use in the United Kingdom under DTI MPT 1340 and in the USA under FCC Part

15. Applications include remote-control and wireless security devices. This is a pin-for-pin replacement in

preexisting transmitter circuits utilizing two-port, 180° SAW resonators.

Absolute Maximum Ratings

Rating

Value

Units

CW RF Power Dissipation (See: Typical Test Circuit)

+0

dBm

DC Voltage Between Any Two Pins (Observe ESD Precautions)

±30

VDC

Case Temperature

-40 to +85

°C

315.0 MHz

SAW

Resonator

RP1239

CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.

Notes:

1.

above +65°C. Typically, aging is greatest the first year after manufacture, decreasing significantly in subsequent years.

2.

3.

One or more of the following United States patents apply: 4,454,488; 4,616,197.

4.

Typically, equipment utilizing this device requires emissions testing and government approval, which is the responsibility of the equipment manufac-

turer.

5.

6.

The design, manufacturing process, and specifications of this device are subject to change without notice.

7.

8.

9.

This equivalent RLC model approximates resonator performance near the resonant frequency and is provided for reference only. The capacitance

capacitance.