STM704T/S/R 3伏的电池切换

The STM690/704/795/802/804/805/806 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-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 STM704/795/806) as well as a power-fail comparator (except for STM795) to provide the system with an early warning of impending power failure.

These devices are available in a standard 8-pin SOIC package or a space-saving 8-pin TSSOP package.

STM704T/S/R 技术特性:

• 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)

STM704T/S/R 订购型号:

STM704T/S/R 技术支持与电子电路设计开发资源下载

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