The CC110L is a cost optimized sub-1 GHz RF transceiver for the 300–348 MHz, 387–464 MHz, and 779–928 MHz frequency bands. The circuit is based on the popular CC1101 RF transceiver, and RF performance characteristics are identical. Two CC110L transceivers together enable a low-cost bidirectional RF link. The RF transceiver is integrated with a highly configurable baseband modem. The modem supports various modulation formats and has a configurable data rate up to 600 kbps. The CC110L provides extensive hardware support for packet handling, data buffering, and burst transmissions. The main operating parameters and the 64-byte receive and transmit FIFOs of CC110L can be controlled through a serial peripheral interface (SPI). In a typical system, the CC110L will be used together with a microcontroller and a few additional passive components.