STM802S Ver la hoja de datos (PDF) - STMicroelectronics

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STM802S

3V Supervisor with Battery Switchover

STMicroelectronics 

STM690, STM704, STM795

STM802, STM804, STM805, STM806

3V Supervisor with Battery Switchover

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

8

1

SO8 (M)

TSSOP8 3x3 (DS)*

Table 1. Device Options

Watchdog Active-

Input

Low RST(1)

STM690T/S/R

✔

✔

STM704T/S/R

✔

Active-

High

RST

STM795T/S/R

✔(2)

STM802T/S/R

✔

✔

STM804T/S/R

✔

✔(2)

STM805T/S/R

✔

✔(2)

STM806T/S/R

✔

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

2. Open drain output.

Manual

Battery

Reset Input Switch-over

✔

✔

✔

✔

✔

✔

✔

✔

✔

Power-fail

Compar-

ator

✔

✔

✔

✔

✔

✔

Chip-

Enable

Gating

✔

* Contact local ST sales office for availability.

April 2006

Rev 7

1/32

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