快速浏览 - 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

概述

完整的数据资料 (PDF, 496kB)
英文下载

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 Thresh.
(V)

Reset Out

t_RESET

Watchdog Feature

Watchdog Timeout

Supervisor Features

Reset Thresh. Accur.
(%)

I_CC
(µA)

Price

Active Low

Active High

min

@ +25°C

max

See Notes

MAX6854

1.2 to 1.8

1.8 to 2.5

2.5 to 3.3

3.3 to 5.5

Push-Pull

1ms to 15ms

15ms to 85ms

85ms to 300ms

300ms to 1s

No Watchdog

Manual Reset

2.5

0.17

$0.92 @1k

MAX6855

Push-Pull

1ms to 15ms

15ms to 85ms

85ms to 300ms

300ms to 1s

No Watchdog

Manual Reset

$0.83 @10k

MAX6856

Open Drain

1ms to 15ms

15ms to 85ms

85ms to 300ms

300ms to 1s

No Watchdog

Manual Reset

$0.92 @1k

MAX6858

Push-Pull

1ms to 15ms

15ms to 85ms

85ms to 300ms

300ms to 1s

No Watchdog

$0.83 @10k

MAX6860

Open Drain

1ms to 15ms

15ms to 85ms

85ms to 300ms

300ms to 1s

No Watchdog

$0.83 @10k

MAX6861

Push-Pull

1ms to 15ms

85ms to 300ms

No Watchdog

Manual Reset

$0.87 @5k

MAX6862

Push-Pull

1ms to 15ms

85ms to 300ms

No Watchdog

Manual Reset

$0.92 @1k

MAX6863

Open Drain

1ms to 15ms

85ms to 300ms

No Watchdog

Manual Reset

$0.92 @1k

MAX6864

Push-Pull

1ms to 15ms

15ms to 85ms

85ms to 300ms

300ms to 1s

Input (WDI)

>2s

Manual Reset

$1.18 @1k

MAX6865

Push-Pull

1ms to 15ms

15ms to 85ms

85ms to 300ms

300ms to 1s

Input (WDI)

>2s

Manual Reset

$1.07 @10k

MAX6866

Open Drain

1ms to 15ms

15ms to 85ms

85ms to 300ms

300ms to 1s

Input (WDI)

>2s

Manual Reset

$1.18 @1k

MAX6867

Push-Pull

1ms to 15ms

15ms to 85ms

85ms to 300ms

300ms to 1s

Input (WDI)

>2s

Manual Reset

$1.07 @10k

MAX6868

Push-Pull

1ms to 15ms

15ms to 85ms

85ms to 300ms

300ms to 1s

Input (WDI)

>2s

Manual Reset

$1.07 @10k

MAX6869

Open Drain

1ms to 15ms

15ms to 85ms

85ms to 300ms

300ms to 1s

Input (WDI)

>2s

Manual Reset

$1.07 @10k

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