STM6904SFEDS6F

The STM6904 supervisor is a low voltage/low supply current processor supervisor, designed to monitor up to four 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 four supply monitors (V_CCand V2IN) have fixed (customer-selectable, factory-trimmed) thresholds (V_RST1and V_RST2). The other two voltage monitor inputs (V3IN and V4IN) are monitored using externally adjustable threshold (0.600 V internal reference) to meet specific level requirements.

If any of the four 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, RST is maintained low for a minimum delay period (t_REC) after ALL monitored supplies rise above their respective thresholds and MR returns to high. This device is in the correct reset output logic state when V_CCgreater than 0.8 V.

The STM6904 is available in a standard 8-lead MSOP (TSSOP) package.