SF2181D

Overview

The SF2181D is a Surface Acoustic Wave (SAW) filter manufactured by RFMi, designed for signal conditioning applications. It operates at a center frequency of 140 MHz with a bandwidth of 22 MHz. The component features a 3.8 x 3.8 x 1.4 mm surface-mount package and supports 50 Ohm and 200 Ohm impedance configurations. It complies with Directive 2002/95/EC (RoHS).

Feature Summary

• Utilizes Surface Acoustic Wave technology for precise frequency filtering.
• Designed for compact integration via small surface-mount packaging.
• Provides stable bandwidth performance for signal conditioning.

Applications

• Wireless communication devices requiring 140 MHz filtering.
• Internet-connected OEM equipment signal conditioning.
• Digital wireless system front-end modules.

Procurement Notes

Verify the manufacturer designation carefully, as the SF2181D part number appears in datasheets from multiple entities including Murata Manufacturing Co and TriQuint Semiconductor alongside RFMi. Confirm the specific supplier source to ensure compatibility with your supply chain requirements and quality standards before procurement.

Selection Notes

Select this component when a 140 MHz SAW filter with a 22 MHz bandwidth is required. Ensure the design accommodates the specified 3.8 x 3.8 x 1.4 mm footprint. Verify impedance matching for either 50 Ohm or 200 Ohm systems based on the circuit architecture.

Part Context

RFMi, an Akoustis brand, produces RF components using SAW, Xtal, and Ceramic technologies. The SF series includes bandpass filters for signal conditioning in digital and wireless applications. This component falls within the RFMi portfolio aimed at enabling connectivity for OEM devices.

Replacement Considerations

Datasheet records list similar parts such as SF2182D from RF Monolithics and Murata, and various part numbers from TriQuint Semiconductor (e.g., 856019, 856064). Cross-reference electrical specifications and pinouts before substitution.

FAQ

What is the operating frequency of the SF2181D?

The SF2181D operates at a center frequency of 140 MHz.

What package type does the SF2181D use?

It uses a 3.8 x 3.8 x 1.4 mm surface-mount package.