STM819L/M 5伏的电池切换
The STM690A/692A/703/704/802/805/817/818/819 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-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 STM703/704/819) as well as a power-fail comparator (except for STM818) 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.
STM819L/M 技术特性:
- 5 V operating voltage
- NVRAM supervisor for external LPSRAM
- Chip-enable gating (STM818 only) for external LPSRAM (7 ns max prop delay)
- RST and RST outputs
- 200 ms (typ) trec
- Watchdog timer - 1.6 sec (typ)
- Automatic battery switchover
- Low battery supply current - 0.4 μA (typ)
- Power-fail comparator (PFI/PFO)
- Low supply current - 40 μA (typ)
- Guaranteed RST (RST) assertion down to VCC = 1.0 V
- Operating temperature:
–40°C to +85°C (industrial grade) - RoHS compliance
– Lead-free components are compliant with the RoHS directive.
STM819L/M 订购型号:
| Ordering Model | Package | RoHS Compliance Grade | General Description | Packing Type |
| STM819LM6E | SO8 | Ecopack1 | 5V Supervisor | Tube |
| STM819LM6F | SO8 | Ecopack1 | 5V Supervisor | Tape And Reel |
| STM819MM6E | SO8 | Ecopack1 | 5V Supervisor | Tube |
| STM819MM6F | SO8 | Ecopack1 | 5V Supervisor | Tape And Reel |
STM819L/M 技术支持与电子电路设计开发资源下载
- STM819L/M 数据手册Datasheet 下载.PDF
- 微处理器监控器选型指南
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