KFF6666A

Overview

The KFF6666A is a ceramic RF duplexer manufactured by Tusonix, a subsidiary of CTS Electronic Components. It operates with a center frequency of 1.88 GHz and supports two distinct bands: Band 1 from 1.93 to 1.99 GHz and Band 2 from 1.85 to 1.91 GHz. The device features a 50-ohm impedance and a bandwidth of 60 MHz. Key electrical specifications include an insertion loss of 3.4 dB. The component utilizes a surface-mount monoblock package with three PC pads, measuring 28.20 mm in length and 4.90 mm in width.

Feature Summary

• Monoblock ceramic construction for compact integration
• Dual-band operation supporting specific frequency ranges
• Surface-mount design with three-pad termination

Applications

• CN applications requiring RF signal separation
• Wireless communication systems operating in the 1.8-2.0 GHz range
• RF front-end modules needing duplexing functionality

Procurement Notes

Verify the manufacturer designation as Tusonix or CTS Electronic Components when sourcing. Confirm the specific band definitions (Band 1: 1.93-1.99 GHz; Band 2: 1.85-1.91 GHz) match system requirements. Ensure compatibility with surface-mount assembly processes using tape and reel packaging. Check for RoHS compliance status as documentation may vary.

Selection Notes

Select this component for applications requiring a fixed center frequency of 1.88 GHz with defined passbands. The 50-ohm impedance ensures standard RF interface matching. Consider the physical dimensions of 28.20 mm x 4.90 mm for board space constraints. The 3.4 dB insertion loss should be evaluated against system link budget requirements.

Part Context

This part belongs to the passive components category under ceramic filters. It is classified specifically as an RF duplexer designed for signal conditioning. The product line includes various SAW duplexers and ceramic filters from Tusonix/CTS.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pinout and dimensional compatibility if considering alternative manufacturers.