RF Components - SAW SF2079E 251.045 MHz SAW SAW Filter - IF - RFM offers a full set of custom embedded wireless networking solutions like Zigbee wireless mesh sensor networks, RF modules, IC transceiver, IC transmitters and IC receivers. RFM, Inc. manufactures low power wireless and RF radio modules, wireless mesh nodes for distributed sensing on distributed sensor networks. Low Power radio, n../arrowband and short range devices, front end saw filters, active RFID, RFIC, coupled resonator filters, single silicon chips in the 70MHZ and 300-1000Mhz range.

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SF2079E

251.045 MHz SAW Filter - IF

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� Low Insertion Loss
� 3.0 X 3.0 X 1.2 mm Surface-Mount Case
� Differential Input and Output
� Complies with Directive 2002/95/EC (RoHS)
Click here if you need additional technical information,
to inquire about samples or to discuss your custom needs.

download data sheet Rev Date 07/21/10

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Specs
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Electrical Characteristics

Characteristic	Symbol	Minimum	Typical	Maximum	Units
Center Frequency	fC		251.045		MHz
Insertion Loss	IL		12.5	15.0	dB
Amplitude Ripple (p-p)
fc - 6.2500 to fc -4.3925 MHz			1.3	2.0	dB
fc - 4.3925 to fc -2.5350 MHz			0.5	1.5	dB
fc - 2.5350 to fc -0.0250 MHz			0.5	1.5	dB
fc + 0.0250 to fc + 2.5350 MHz			0.7	1.5	dB
fc + 2.5350 to fc + 4.3925 MHz			0.6	1.5	dB
fc + 4.3925 to fc + 6.2500 MHz			0.9	2.5	dB
1.5 dB Passband width centered at fc			13.4		MHz
3.0 dB Passband width centered at fc			14.1		MHz
Low Side Attenuation < 234.545 MHz ( < fc - 16.5 MHz)		35	38
Low Side Attenuation, 234.545 to 240.545 MHz (fc-10.5 MHz)		32	34		dB
High Side Attenuation, 260.045 to 267.545 MHz (fc+9.0 MHz)		14	26		dB
High Side Attenuation > 267.545 MHz ( > fc + 16.5 MHz)		30	35		dB
Temperature Coefficient of frequency				-18	ppm/K
Delay Ripple (p-p)
fc - 6.2500 to fc -4.3925 MHz			44	90	ns
fc - 4.3925 to fc -2.5350 MHz			37	70	ns
fc - 2.5350 to fc -0.0250 MHz			39	120	ns
fc + 0.0250 to fc + 2.5350 MHz			40	120	ns
fc + 2.5350 to fc + 4.3925 MHz			34	70	ns
fc + 4.3925 to fc + 6.2500 MHz			37	90	ns
Source/Load Impedance			150		ohms