Features: ` 5V OPERATING VOLTAGE` NVRAM SUPERVISOR FOR EXTERNAL LPSRAM` CHIP-ENABLE GATING (STM818 only) FOR EXTERNAL LPSRAM (7ns max PROP DELAY)` RST AND RST OUTPUTS` 200ms (TYP) trec` WATCHDOG TIMER - 1.6sec (TYP)` AUTOMATIC BATTERY SWITCHOVER` LOW BATTERY SUPPLY CURRENT - 0.4A (TYP)` POWER-FAIL...
STM802: Features: ` 5V OPERATING VOLTAGE` NVRAM SUPERVISOR FOR EXTERNAL LPSRAM` CHIP-ENABLE GATING (STM818 only) FOR EXTERNAL LPSRAM (7ns max PROP DELAY)` RST AND RST OUTPUTS` 200ms (TYP) trec` WATCHDOG TIM...
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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).
The STM690A/692A/703/704/STM802/805/817/818/ 819 Supervisors are self-contained devices which provide microprocessor supervisory functions with the ability to non-volatize and write-protect external LPSRAM. A precision voltage reference and comparator monitors the VCC input for an out-oftolerance 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 STM703/704/ 819) as well as a power-fail comparator (except for STM802) to provide the system with an early warning of impending power failure.
These STM802 are available in a standard 8-pin SOIC package or a space-saving 8-pin TSSOP package.