STM802 datasheet(1/32 Pages) STMICROELECTRONICS

No de pièce	STM802

Description	3V Supervisor with Battery Switchover

PDF	32 Pages

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Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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April 2006

STM690, STM704, STM795

STM802, STM804, STM805, STM806

3V Supervisor with Battery Switchover

* Contact local ST sales office for availability.

Rev 7

FEATURES SUMMARY

■

RST OR RST OUTPUTS

■

NVRAM SUPERVISOR FOR EXTERNAL

LPSRAM

■

CHIP-ENABLE GATING (STM795 only) FOR

EXTERNAL LPSRAM (7ns max PROP

DELAY)

■

MANUAL (PUSH-BUTTON) RESET INPUT

■

200ms (TYP) trec

■

WATCHDOG TIMER - 1.6sec (TYP)

■

AUTOMATIC BATTERY SWITCHOVER

■

LOW BATTERY SUPPLY CURRENT - 0.4µA

(TYP)

■

POWER-FAIL COMPARATOR (PFI/PFO)

■

LOW SUPPLY CURRENT - 40µA (TYP)

■

GUARANTEED RST (RST) ASSERTION

DOWN TO VCC = 1.0V

■

OPERATING TEMPERATURE:

–40°C to 85°C (Industrial Grade)

Figure 1. Packages

Table 1. Device Options

Note: 1. All RST outputs push-pull (unless otherwise noted)

2. Open drain output.

8

1

SO8 (M)

TSSOP8 3x3 (DS)*

Watchdog

Input

Active-

Low RST(1)

Active-

High

RST

Manual

Reset Input

Battery

Switch-over

Power-fail

Compar-

ator

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

✔✔

✔

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