In summary, Timerblox parts offer complete and simple timing solutions. With an internal silicon oscillator, the TimerBlox parts do not rely on a crystal, ceramic resonators or external capacitors for its time base. These simple devices are programmed using one to three resistors and operate on a single supply voltage from 2.25V to 5.5V, with a supply current from 60µA to 250µA. The 20mA source and sink capability allows the TimerBlox parts to directly drive opto-isolators and transformers for electrical isolation. The small SOT23 footprint allows each timing device to be placed at the point of use, without routing signals over long distances, and provides an ideal timer for space-limited applications such as handheld and portable devices. Fully specified over the temperature range of -40°C to 125°C, the TimerBlox parts are suitable for demanding automotive and industrial environments where many oscillators and microcontrollers are unable to operate.