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The STM70x Supervisors are self-contained devices which provide microprocessor supervisory functions. A precision voltage reference and comparator monitors the VCC input for an out-of-tolerance condition. When an invalid VCC condition occurs, the reset output (RST) is forced low (or high in the case of RST). These devices also offer a watchdog timer (except for STM708T/S/R) as well as a power-fail comparator to provide the system with an early warning of impending power failure.
The STM706P is identical to the STM706R, except its reset output is active-high.
These devices are available in a standard 8-pin SOIC package or a space-saving 8-pin TSSOP package.
STM708S Maximum Ratings
Symbol
Parameter
Value
Unit
TSTG
Storage Temperature (VCC Off)
55 to 150
°C
TSLD(1)
Lead Solder Temperature for 10 seconds
260
°C
VIO
Input or Output Voltage
0.3 to VCC +0.3
V
VCC/VBAT
Supply Voltage
0.3 to 6.0
V
IO
Output Current
20
mA
PD
Power Dissipation
320
mW
Note: 1. Reflow at peak temperature of 255°C to 260°C for < 30 seconds (total thermal budget not to exceed 180°C for between 90 to 150 seconds).
STM708S Features
` PRECISION VCC MONITOR STM706/708 T: 3.00V VRST 3.15V S: 2.88V VRST 3.00V R; STM706P: 2.59V VRST 2.70V ` RST AND RST OUTPUTS ` 200ms (TYP) trec ` WATCHDOG TIMER - 1.6sec (TYP) ` MANUAL RESET INPUT (MR) ` POWER-FAIL COMPARATOR (PFI/PFO) ` LOW SUPPLY CURRENT - 40A (TYP) ` GUARANTEEDRST (RST) ASSERTION DOWN TO VCC = 1.0V ` OPERATING TEMPERATURE: 40°C to 85°C (Industrial Grade)