说明
MIC2777是一款双电源监控器,在紧凑的5引脚SOT封装中提供欠压监测、手动复位功能和通电复位生成功能。功能包括两个欠压检测器,一个固定,一个可调,以及高有效和低有效复位输出。一个欠电压检测器将VDD与固定阈值进行比较。有十个出厂编程设定的阈值可用。另一个欠压检测器可由用户调节。复位输出在上电和任何时间VDD或输入电压下降到对应的参考电压以下时被断言不少于140ms。在输入电压和VDD随后上升回到阈值边界以上之后,它们在超时时段内保持断言。通过下拉可调输入,可以随时生成重置。包括迟滞,以防止噪声引起的抖动。典型的电源电流为3.5µa。
特性
- Monitors two independent power supplies for under-voltage conditions
- One fixed and one user adjustable input
- 1.5% theshold accuracy
- Choice of factory-programmed thresholds
- User-adjustable input can monitor supplies as low as 0.3V
- Generates 140ms (minimum) power-on RESET pulse
- Manual reset capability
- Both active-high and active-low RESET outputs
- Input may be pulled above VDD(abs. max.)
- /RST output valid down to 1.2V
- Ultra-low supply current, 3.5µA typical
- Rejects brief input transients
- IttyBitty®5-pin SOT-23 package
参数
类型 | 描述 |
Driver Type | Supervisor |
Min Operating Voltage (V) | 1.5 |
Max Operating Voltage (V) | 5.5 |
Nominal Reset Voltage Min | 1.69 |
Nominal Reset Voltage Max | 4.68 |
Watchdog Timer | No |
Manual Reset | No |
Power Fail | No |
Min Operating Ambient Temperature (°C) | -40 |
Max Operating Ambient Temperature (°C) | 85 |



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