STM6904 is a low voltage supervisor launched by ST. It has four voltage monitoring functions, can monitor the main voltage, V2IN and two adjustable power supply inputs, has 0.6V internal reference voltage, 12uA low supply current, working voltage range of 0.8V-5.5V, operating temperature range of -40℃-85℃.
The STM6904 is a quad voltage supervisor designed to monitor up to four system power supply voltages. It is targeted at applications such as set-top boxes, multi-voltage systems, and networking equipment. The device supports a push-button type manual reset input (MR) and includes two fixed reset thresholds (Vcc and V2IN) alongside two adjustable inputs (V3IN and V4IN) using an internal 0.6 V reference.
| Supply voltage range | 0.8 to 5.5 V |
|---|---|
| Supply current | 12 µA (typ) |
| Operating temperature | -40 to 85 °C |
| Package type | 8-pin MSOP/TSSOP |
| Reset delay time (trec) | 210 ms or 420 ms |
| Internal reference voltage | 0.6 V |
Vcc thresholds range from 3.078 V to 2.866 V, while V2IN thresholds range from 2.333 V to 1.050 V.
The trec is selected by tying the TRgeL pin to Vss for 210 ms or to Vcc for 420 ms.