Texas Instruments' TPS3435 nano IQ timer has an ultra-low power consumption (250 nA typical) offering a programmable high-accuracy timeout watchdog timer with a host of features for a wide variety of applications. The timeout watchdog timer can be factory-programmed or user-programmed using an external capacitor. The timer value can be changed on-the-fly using a combination of logic pins. The watchdog feature can be enabled or disabled using a dedicated pin or a combination of timer extension pins.

The device also offers start-up delay options to disable watchdog monitoring for a fixed amount of time immediately after the host powers up. The WDO delay can be set by factory-programmed default delay settings or programmed by an external capacitor. The timer has a latched-output operation where the output is latched until the watchdog fault is cleared. The TPS3435 provides a performance upgrade alternative to the TPS3431 devices and is available in small 6-pin WSON and 8-pin SOT23 packages.