The RF109, a fully integrated transceiver device, provides the transmit, receive, and frequency synthesis functions for 2400 MHz digital spread spectrum systems operating in the 2400–2483.5 MHz portion of the ISM (Industrial, Scientific, Medical) band. The device has a direct conversion architecture that minimizes circuit complexity and cost.

FEATUREs
• Low power dissipation
• Fast settling from standby mode to active mode
• Separate enable lines for transmit, receive, and synthesizer
• 64 programmable channels with 1.8 MHz channel spacing
• 3-battery-cell operation
• 48-pin TQFP package with exposed paddle (refer to Figure 6)

APPLICATIONs
• Digital Spread Spectrum (DSS) cordless telephone
• Direct sequence spread spectrum systems
• Frequency hopping spread spectrum systems
• Wireless LANs
• Wireless modems
• Wireless security
• Inventory control systems