STM6905SYEDS6F

The STM6905 supervisor is a low voltage/low supply current processor supervisor, designed to monitor up to five system power supply voltages. This device is targeted at applications such as set-top boxes (STBs), portable, battery-powered systems, networking and communication systems.

The device supports a push-button type manual reset input (MR). Two of the five supply monitors (V_CCand V2IN) have fixed (customer-selectable, factory-trimmed) thresholds (V_RST1and V_RST2). The other three voltage monitor inputs (V3IN, V4IN and V5IN) are monitored using externally adjustable threshold (600 mV internal reference) to meet specific level requirements.

If any of the five monitored voltages drops below its factory-trimmed or adjustable thresholds, or if the MRis asserted to logic low, the reset output RSTis asserted (driven low). Once asserted, RSTis maintained low for a minimum delay period (t_REC) after ALL monitored supplies rise above their respective thresholds and MRreturns to high. The reset output logic state is valid for V_CCgreater than 0.8 V.

The STM6905 is available in a standard 8-lead MSOP (TSSOP) package.