3V Supervisor
STM690, STM704, STM795 STM802, STM804, STM805, STM806
3 V supervisor with battery switchover
Features
■ RST or RST outp...
Description
STM690, STM704, STM795 STM802, STM804, STM805, STM806
3 V supervisor with battery switchover
Features
■ RST or RST outputs ■ NVRAM supervisor for external LPSRAM ■ Chip enable gating (STM795 only) for external
LPSRAM (7 ns max prop delay) ■ Manual (push-button) reset input ■ 200 ms (typ) trec ■ Watchdog timer - 1.6 s (typ) ■ Automatic battery switchover ■ Low battery supply current - 0.4 µA (typ) ■ Power-fail comparator (PFI/PFO) ■ Low supply current - 40 µA (typ) ■ Guaranteed RST (RST) assertion
down to VCC = 1.0 V ■ Operating temperature:
–40 °C to 85 °C (industrial grade) ■ RoHS compliance
– Lead-free components are compliant with the RoHS directive
8 1
SO8 (M)
TSSOP8 3x3 (DS)(1)
1. Contact local ST sales office for availability.
Table 1. Device summary
Watchdog Active- low Active- high
Input
RST(1)
RST(1)
STM690T/S/R
✓
✓
STM704T/S/R
✓
STM795T/S/R
✓(2)
STM802T/S/R
✓
STM804T/S/R
✓
STM805T/S/R
✓
✓ ✓(2) ✓(2)
STM806T/S/R
✓
1. All RST outputs push-pull (unless otherwise noted). 2. Open drain output.
Manual reset input ✓
✓
Battery Power-fail Chip enable switchover comparator gating
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
August 2010
Doc ID 10519 Rev 9
1/42
www.st.com
1
Contents
Contents
STM690, STM704, STM795, STM802, STM804, STM805, STM806
1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1 Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
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