STM806SDS6E datasheet(2/42 Pages) STMICROELECTRONICS

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STM806SDS6E Datasheet(PDF) 2 Page - STMicroelectronics

Part #	STM806SDS6E

Description	3 V supervisor with battery switchover

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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Contents

STM690, STM704, STM795, STM802, STM804, STM805, STM806

2/42

Doc ID 10519 Rev 9

Contents

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

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

Typical operating characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

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