Also included in these ISM band transceiver ICs are built-in features like wake-up timer, low battery detector, transmit and receive data FIFOs, power-on reset circuit, and general purpose digital I/Os. The chip incorporates a high performance ADC and digital modem which perform demodulation, filtering, and packet handling in the digital domain, making it ideal for configuration to mutiple applications. These features simplify the task of the system designer and allow the use of lower-end microcontrollers. The Si4432 has configurable output power from +11 to +20 dBm and is ideal for Frequency Hopping Systems where maximum range is desired. The Si4430/31 have configurable output power from -8 to +13 dBm. Both the Si4431 and Si4432 comply with FCC and ETSI requirements when used in any of the standard ISM Bands. Only a 30 MHz crystal and supply bypass capacitors are necessary as external components, making the devices ideal for high volume production in applications where size and cost are important.