MAX6730, MAX6731, MAX6732, MAX6733, MAX6734, MAX6735 单/双/三电压微处理器监控电路，带有独立的看门狗输出

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MAX6730-MAX6735单/双/三路µP监控电路具有看门狗定时和手动复位功能。MAX6730-MAX6735提供工厂预置复位门限，用于监视+0.9V至+5V电压，可调节的复位输入能够监视低至+0.63V的电压。与离散IC或分立元件相比，这些功能的组合显著提高了系统的稳定性和精确度。

当所有被监视电压超过它们各自的门限时，低电平有效复位输出会在复位超时周期内保持复位状态。多种工厂设定复位门限的组合降低了对外部元件数量的要求。MAX6730/MAX6731可监视单路固定电压、MAX6732/MAX6733可监视两路固定电压，MAX6734/MAX6735可监视两路固定电压和一路可调电压。所有器件均提供6种最小复位周期，范围从1.1ms至1120ms。

MAX6730-MAX6735具有看门狗定时器和独立的看门狗输出。看门狗定时器可防止系统因代码运行错误发生死锁。在复位信号被触发后，看门狗启动延时为54s，允许系统在上电期间进行初始化。看门狗在初始化完成1.68s后进入正常工作状态。MAX6730/MAX6732/MAX6734具有低电平有效、漏极开路的看门狗输出。MAX6731/MAX6733/MAX6735具有低电平有效、推挽式看门狗输出。

器件的其他特性包括：手动复位输入(MAX6730/MAX6731/MAX6734/MAX6735)和推挽式复位输出(MAX6731/MAX6733/MAX6735)或漏极开路复位输出(MAX6730/MAX6732/MAX6734)。MAX6730-MAX6733采用小巧的SOT23-6封装；MAX6734/MAX6735采用节省空间的SOT23-8封装。所有器件均工作在扩展级温度范围(-40°C至+85°C)。

关键特性

应用/使用

V_CC1 (主电源)复位门限：+1.575V至+4.63V
V_CC2 (次级电源)复位门限：+0.79V至+3.08V
可调RSTIN门限用于监视低至+0.63V的电压(仅MAX6734/MAX6735)
6种复位超时选项
具有独立看门狗输出的看门狗定时器
- 35s (最小值)初始看门狗启动周期
- 1.12s (最小值)标准看门狗超时周期
手动复位输入(MAX6730/MAX6731/MAX6734/MAX6735)
V_CC1或V_CC2低至+0.8V时保证复位输出正常
推挽式/RESET输出或漏极开路/RESET输出
不受V_CC瞬变影响
+3.6V供电时电源电流低至14µA (典型值)
小尺寸6引脚或8引脚SOT23封装

	计算机/服务器
	工业设备
	多电压系统
	便携式电池供电设备
	打印机与传真机
	机顶盒
	电信/网络设备

Key Specifications: Supervisors (1 Monitored Voltage)

Part Number

Reset Threshold Range (V)

Active-Low Reset Output

Min. Reset Timeout Range

Watchdog Feature

Nom. Watchdog Timeout Range

Supervisor Features

Reset Thresh. Acc. (% @+25°C)

Max. I_CC (µA)

RoHS Available

Package

Operating Temp. Range (°C)

Price^**

MAX6730

1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5

Open Drain

15ms to 85ms
1ms to 15ms
85ms to 300ms
>1s

Input (WDI)
Input/Output (WDI/WDO)
Extended Setup Period

1s to 2s
>2s

Manual Reset

2.5

Yes

SOT-23/6

-40 to +85
0 to +70

$1.31 @ 1k

MAX6731

Push-Pull

$1.31 @ 1k

See All Supervisors (1 Monitored Voltage) (268)

Key Specifications: Supervisors (2 Monitored Voltages)

Part Number

Interface

Reset Threshold Range (V)

Active-Low Reset Output

Min. Reset Timeout Range

Watchdog Feature

Nom. Watchdog Timeout Range

Reset Thresh. Acc. (% @+25°C)

Max. I_CC (µA)

Package

Operating Temp. Range (°C)

Price^**

MAX6732

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

Open Drain

15ms to 85ms
1ms to 15ms
85ms to 300ms
>1s

Input (WDI)
Input/Output (WDI/WDO)
Extended Setup Period

1s to 2s
>2s

2.5

SOT-23/6

-40 to +85
0 to +70

$1.63 @ 1k

MAX6733

Push-Pull

$1.63 @ 1k

See All Supervisors (2 Monitored Voltages) (70)

Key Specifications: Supervisors (3 Monitored Voltages)

Part Number

Interface

Reset Threshold Range (V)

Active-Low Reset Output

Min. Reset Timeout Range

Watchdog Feature

Nom. Watchdog Timeout Range

Supervisor Features

Reset Thresh. Acc. (% @+25°C)

Max. I_CC (µA)

RoHS Available

Package

Operating Temp. Range (°C)

Price^**

MAX6734

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

Open Drain

15ms to 85ms
1ms to 15ms
85ms to 300ms
>1s

Input (WDI)
Input/Output (WDI/WDO)
Extended Setup Period

1s to 2s
>2s

Adjustable Reset Input
Manual Reset

2.5

Yes

SOT-23/8

-40 to +85
0 to +70

$1.79 @ 1k

MAX6735

Push-Pull

$1.79 @ 1k

See All Supervisors (3 Monitored Voltages) (21)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.