MAX6854, MAX6855, MAX6856, MAX6858, MAX6860, MAX6861, MAX6862, MAX6863, MAX6864, MAX6865, MAX6866, MAX6867, MAX6868, MAX6869 纳安级功耗的微处理器监控电路，带有手动复位及看门狗定时器

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完整的数据资料 (PDF, 496kB)
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MAX6854/MAX6855/MAX6856/MAX6858/MAX6860–MAX6869超低电流(典型值170nA)微处理器(µP)监控电路在5引脚SOT23封装内集成了电压监测、看门狗定时器和手动复位等功能。一旦监视电压低于工厂设定的复位门限，手动复位被触发或者看门狗定时器超时，该器件就会发出复位信号。在V_CC升至复位门限以上或手动复位释放后，复位输出继续保持一个最短延时。工厂校准的复位门限以100mV的间隔从+1.575V至+4.625V (参见完整数据资料中的Threshold Suffix Guide)。每款器件提供6种最小复位延时选择，范围从10ms至1200ms。

MAX6854/MAX6855/MAX6856/MAX6858/MAX6860–MAX6869具有多种配置(参见完整数据资料中的Selector Guide)。MAX6854/MAX6855/MAX6856/MAX6861–MAX6869提供手动复位输入/MR。MAX6864–MAX6869具有一个看门狗定时器，通过监视WDI引脚的活动及时发现代码运行错误。MAX6864–MAX6869看门狗超时时间可选为3.3s或者209s (典型值)。MAX6861/MAX6862/MAX6863具有10ms或者150ms (最小)的引脚可选择复位延时。这些器件提供推挽式低电平、推挽式高电平和漏极开路的低电平复位输出。

关键特性

应用/使用

超低工作电流170nA (典型值)
复位门限从+1.575V至+4.625V，间隔约为100mV
6种最短复位延时选择，从10ms到1200ms
手动复位可选功能
看门狗定时器可选功能
引脚可选的10ms/150ms (最小)复位延时(MAX6861/MAX6862/MAX6863)
对V_CC上的短时瞬变不敏感
保证复位有效至V_CC = +1.1V
三种复位输出选择
- 推挽/RESET
- 推挽RESET
- 漏极开路/RESET
无需外部元件
小巧的5引脚SOT23封装
引脚与TPS3836/TPS3837/TPS3838兼容(MAX6861/MAX6862/MAX6863)

	血糖监测/病人护理监视器
	MP3播放器/寻呼器
	PDA与蜂窝电话
	便携式电池供电设备

Key Specifications: Supervisors (1 Monitored Voltage)
Part Number	Reset Threshold Range (V)	Active-Low Reset Output	Active-High Reset Output	Min. Reset Timeout Range	Watchdog Feature	Nom. Watchdog Timeout Range	Supervisor Features	Reset Thresh. Acc. (% @+25°C)	Max. I_CC (µA)	Operating Temp. Range (°C)
MAX6854	1.2 to 1.8 1.8 to 2.5 2.5 to 3.3 3.3 to 5.5	Push-Pull	-	15ms to 85ms 1ms to 15ms 300ms to 1s 85ms to 300ms	No Watchdog	-	Manual Reset	2.5	1	-40 to +85
MAX6855		-	Push-Pull	15ms to 85ms 1ms to 15ms 300ms to 1s 85ms to 300ms	No Watchdog	-	Manual Reset
MAX6856		Open Drain	-	15ms to 85ms 1ms to 15ms 300ms to 1s 85ms to 300ms	No Watchdog	-	Manual Reset
MAX6858		Push-Pull	-	15ms to 85ms 1ms to 15ms 300ms to 1s 85ms to 300ms	No Watchdog	-	-
MAX6860		Open Drain	-	15ms to 85ms 1ms to 15ms 300ms to 1s 85ms to 300ms	No Watchdog	-	-
MAX6861		Push-Pull	-	1ms to 15ms 85ms to 300ms	No Watchdog	-	Manual Reset
MAX6862		-	Push-Pull	1ms to 15ms 85ms to 300ms	No Watchdog	-	Manual Reset
MAX6863		Open Drain	-	1ms to 15ms 85ms to 300ms	No Watchdog	-	Manual Reset
MAX6864		Push-Pull	-	15ms to 85ms 1ms to 15ms 300ms to 1s 85ms to 300ms	Input (WDI)	>2s	Manual Reset
MAX6865		-	Push-Pull	15ms to 85ms 1ms to 15ms 300ms to 1s 85ms to 300ms	Input (WDI)	>2s	Manual Reset
MAX6866		Open Drain	-	15ms to 85ms 1ms to 15ms 300ms to 1s 85ms to 300ms	Input (WDI)	>2s	Manual Reset
MAX6867		Push-Pull	-	15ms to 85ms 1ms to 15ms 300ms to 1s 85ms to 300ms	Input (WDI)	>2s	Manual Reset
MAX6868		-	Push-Pull	15ms to 85ms 1ms to 15ms 300ms to 1s 85ms to 300ms	Input (WDI)	>2s	Manual Reset
MAX6869		Open Drain	-	15ms to 85ms 1ms to 15ms 300ms to 1s 85ms to 300ms	Input (WDI)	>2s	Manual Reset
See All Supervisors (1 Monitored Voltage) (268)