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STM704

ST Microelectronics
Part Number STM704
Manufacturer ST Microelectronics
Description 3V Supervisor
Published Jan 3, 2006
Detailed Description STM690, STM704, STM795 STM802, STM804, STM805, STM806 3 V supervisor with battery switchover Features ■ RST or RST outp...
Datasheet PDF File STM704 PDF File

STM704
STM704


Overview
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 .
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6 1.
1 Pin descriptions .
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9 1.
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1 MR (manual reset) .
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9 1.
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2 1.
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3 WDI (watchdog input) .
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9 RST (active-low reset) .
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9 1.
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4 1.
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5 1.
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6 RST (active-high reset - open drain) .
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9 PFI (power-fail input) .
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