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STM802 Scheda tecnica(PDF) 2 Page - STMicroelectronics

Il numero della parte STM802
Spiegazioni elettronici  3 V supervisor with battery switchover
PDF  42 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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Contents
STM690, STM704, STM795, STM802, STM804, STM805, STM806
2/42
Doc ID 10519 Rev 9
Contents
1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1
Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.1.1
MR (manual reset) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.1.2
WDI (watchdog input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.1.3
RST (active-low reset) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.1.4
RST (active-high reset - open drain) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.1.5
PFI (power-fail input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.1.6
PFO (power-fail output) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.1.7
VOUT (supply output voltage) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.1.8
Vccsw (VCC switch output) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.1.9
E (chip enable input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.1.10
ECON (conditional chip enable) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.1.11
VBAT (backup battery input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.1
Reset output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2
Push-button reset input (STM704/806) . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.3
Watchdog input (NOT available on STM704/795/806) . . . . . . . . . . . . . . . 14
2.4
Backup battery switchover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.5
Chip enable gating (STM795 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.6
Chip enable input (STM795 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.7
Chip enable output (STM795 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.8
Power-fail input/output (NOT available on STM795) . . . . . . . . . . . . . . . . 17
2.9
Applications information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.10
Using a SuperCap™ as a backup power source . . . . . . . . . . . . . . . . . . . 19
2.11
Negative-going VCC transients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3
Typical operating characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5
DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31



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