STM802 datasheet(1/42 Pages) STMICROELECTRONICS

No. de pieza	STM802

Descripción Electrónicos	3 V supervisor with battery switchover

PDF	42 Pages

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Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

Página de inicio	http://www.st.com

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1 / 42 page

August 2010

Doc ID 10519 Rev 9

1/42

1

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

1.

Contact local ST sales office for availability.

8

1

SO8 (M)

TSSOP8 3x3 (DS)(1)

Table 1.

Device summary

Watchdog

Input

Active- low

RST(1)

Active- high

RST(1)

Manual

reset

input

Battery

switchover

Power-fail

comparator

Chip enable

gating

STM690T/S/R

✓✓

✓

STM704T/S/R

✓✓

✓

STM795T/S/R

✓(2)

✓✓

STM802T/S/R

✓✓

✓

STM804T/S/R

✓✓(2)

✓✓

STM805T/S/R

✓✓(2)

✓✓

STM806T/S/R

✓✓

✓

1.

All RST outputs push-pull (unless otherwise noted).

2.

Open drain output.

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