STM690 Datasheet, PDF (1/31 Pages) STMicroelectronics – 3V Supervisor with Battery Switchover

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) t_rec
■ 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 V_CC = 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
STM690T/S/R
Watchdog
Input
✔
Active-
Low RST⁽¹⁾
✔
Active-
High
RST
STM704T/S/R
✔
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.
September 2004
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