快速浏览 - MAX6736, MAX6737, MAX6738, MAX6739, MAX6740, MAX6741, MAX6742, MAX6743, MAX6744, MAX6745 低功耗、双/三电压、SC70封装的微处理器监控电路

概述

完整的数据资料 (PDF, 664kB)
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MAX6736–MAX6745是低功耗、二/三路电压、微处理器(µP)监控电路。如果任一被监视电压跌落至工厂设定或可调节的门限以下时，这些器件会触发系统复位，在所有电源电压上升至门限以上之后，复位信号仍将在最小超时周期内保持复位有效。与离散IC或分立元件相比，这些集成的2路/3路监控电路可显著减小系统尺寸并降低功耗。6µA低电源电流使得这些器件非常适合便携式设备。

MAX6736/MAX6737是两路固定电压µP监控电路，具有手动复位输入。MAX6738/MAX6739具有一路固定和一路可调节复位门限及手动复位输入。MAX6740/MAX6743是三路µP监控器件，具有两路固定和一路用户可调复位门限输入。MAX6741/MAX6744是两路电压µP监控器，具有电源就绪(POK)输出，可用于顺序上电。MAX6742/MAX6745监视主V_CC电源并具有独立的电源失效比较器。

MAX6736–MAX6745提供工厂预置复位门限选项，可监视1.8V至5.0V I/O电源(V_CC1)和0.9V至3.3V核电源(V_CC2) (完整数据资料的表1)。外部可调RSTIN输入允许监视低至0.5V的电压。

这些器件具有推挽式或漏极开路复位输出以及手动复位输入和电源失效输入/输出等功能(参见完整数据资料中的Selector Guide)。MAX6736–MAX6745采用节省空间的5引脚SC70封装，工作温度范围-40°C至+85°C。

关键特性		应用/使用
二/三路电源复位电压监视器精密的、工厂预置复位门限，监视电压范围0.9V至5.0V 低至0.488V的可调复位输入 150ms和1200ms (最小值)复位超时周期选项 V_CC1电源就绪输出，用于电源顺序上电(MAX6741/MAX6744) 电源失效输入/输出(MAX6742/MAX6745) 6µA电源电流小巧的SC70封装		控制器 GPS装置多电压系统笔记本电脑 PDA 便携式电池供电设备 POS设备

Key Specifications: Power-Supply Sequencers and Voltage Trackers

Part Number

Option

Interface

Input Chan.

V_IN
(V)

Features

Oper. Temp.
(°C)

Package/Pins

Smallest Available Pckg.
(mm²)

Price

max

max w/pins

See Notes

MAX6741

Sequence

Factory Fixed

R/C Adjustable

Reset Output

-40 to +85

0 to +70

5.3

MAX6744

查看所有Power-Supply Sequencers and Voltage Trackers (35)

Key Specifications: Supervisors (1 Monitored Voltage)

Part Number

Reset Thresh.
(V)

Reset Out

t_RESET

Watchdog Feature

Supervisor Features

Reset Thresh. Accur.
(%)

I_CC
(µA)

Price

min

@ +25°C

max

See Notes

MAX6742

0 to 1.2

1.2 to 1.8

1.8 to 2.5

2.5 to 3.3

3.3 to 5.5

Active Low

Open Drain

85ms to 300ms

>1s

No Watchdog

Manual Reset

Power Fail Comparator/Low Battery Detect

MAX6745

Active Low

Push-Pull

Power Fail Comparator/Low Battery Detect

查看所有Supervisors (1 Monitored Voltage) (274)

Key Specifications: Supervisors (2 Monitored Voltages)

Part Number

Interface

Reset Thresh.
(V)

Reset Out

t_RESET

Watchdog Feature

Supervisor Features

Reset Thresh. Accur.
(%)

I_CC
(µA)

Price

min

@ +25°C

max

See Notes

MAX6736

Factory Fixed

0 to 1.2

1.2 to 1.8

1.8 to 2.5

2.5 to 3.3

3.3 to 5.5

Active Low

Open Drain

85ms to 300ms

>1s

No Watchdog

Manual Reset

$1.38 @1k

MAX6737

Factory Fixed

Active Low

Push-Pull

Manual Reset

$1.38 @1k

MAX6738

Factory Fixed

R/C Adjustable

Active Low

Open Drain

Adjustable Reset Input

Manual Reset

MAX6739

Factory Fixed

R/C Adjustable

Active Low

Push-Pull

Adjustable Reset Input

Manual Reset

$1.38 @1k

MAX6741

Factory Fixed

R/C Adjustable

Active Low

Open Drain

Manual Reset

$1.50 @1k

MAX6744

Factory Fixed

R/C Adjustable

Active Low

Push-Pull

$1.50 @1k

查看所有Supervisors (2 Monitored Voltages) (84)

Key Specifications: Supervisors (3 Monitored Voltages)

Part Number

Interface

Reset Thresh.
(V)

Reset Out

t_RESET

Watchdog Feature

Supervisor Features

Reset Thresh. Accur.
(%)

I_CC
(µA)

Price

min

@ +25°C

max

See Notes

MAX6740

Factory Fixed

R/C Adjustable

0 to 1.2

1.2 to 1.8

1.8 to 2.5

2.5 to 3.3

3.3 to 5.5

Active Low

Open Drain

85ms to 300ms

>1s

No Watchdog

Adjustable Reset Input

Manual Reset

$1.50 @1k

MAX6743

Active Low

Push-Pull

Adjustable Reset Input

$1.50 @1k

查看所有Supervisors (3 Monitored Voltages) (32)