快速浏览 - MAX6730A, MAX6731A, MAX6732A, MAX6733A, MAX6734A, MAX6735A 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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MAX6730A–MAX6735A系列单/双/三电压微处理器(µP)监控器具有看门狗定时器和手动复位功能。MAX6730A–MAX6735A可提供由工厂预设的复位门限，监测电压为+0.9V至+5V；还提供一路可调复位输入，可监测低至+0.63V的电压。与离散IC或分立元件相比，这些特性的集成可显著提高系统的稳定性和精度。

在所有被监视的电压超过其各的自门限后，触发低电平有效的复位输出，并保持至复位超时时间结束。多种工厂预设的复位门限组合可以减少所需的外部元件数。MAX6730A/MAX6731A监视单个固定电压，MAX6732A/MAX6733A监视两个固定电压，MAX6734A/MAX6735A则监视两个固定电压和一个可调电压。所有器件都可提供6种最小复位超时时间，范围为1.1ms至1120ms。

MAX6730A–MAX6735A提供具有独立输出的看门狗定时器。在代码执行错误时，看门狗定时器可以防止系统闭锁。在上电期间，复位触发后看门狗延时54s启动，以便使系统完成上电初始化。在系统初始化完成后，看门狗处于正常模式，并具有1.68s的延时。MAX6730A/MAX6732A/MAX6734A可提供一个低电平有效、漏极开路的看门狗输出。而MAX6731A/MAX6733A/MAX6735A则提供一个低电平有效、推挽型看门狗输出。

其他特性包括手动复位输入(MAX6730A/MAX6731A/MAX6734A/MAX6735A)和推挽型复位输出(MAX6731A/MAX6733A/MAX6735A)或者漏极开路复位输出(MAX6730A/MAX6732A/MAX6734A)等。MAX6730A–MAX6733A可提供薄型6引脚SOT23封装。MAX6734A/MAX6735A可提供8引脚、节省空间的SOT23封装。所有器件都可工作在扩展的-40°C至+125°C温度范围。

关键特性

应用/使用

V_CC1 (主电源)复位门限：+1.575V至+4.63V
V_CC2 (副电源)复位门限：+0.79V至+3.08V
可调RSTIN门限可监视低于+0.63V的电压(仅MAX6734A/MAX6735A)
6种复位超时选项
具有独立输出的看门狗定时器
- 35s (最小值)看门狗初始启动时间
- 1.12s (最小值)看门狗正常超时时间
手动复位输入(MAX6730A/MAX6731A/MAX6734A/MAX6735A)
V_CC1或V_CC2低至+0.8V时可保证复位输出正常
推挽型/RESET或漏极开路/RESET输出
不受V_CC短时瞬变影响
+3.6V供电时电源电流低至14µA (典型值)
小尺寸6引脚和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/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)

Price^**

MAX6730A

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

Open Drain

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

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

1s to 2s
>2s

Manual Reset

2.5

$1.31 @ 1k

MAX6731A

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
>1s

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

1s to 2s
>2s

Manual Reset

2.5

$1.31 @ 1k

See All Supervisors (1 Monitored Voltage) (270)

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)

Price^**

MAX6732A

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

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

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

1s to 2s
>2s

2.5

$1.63 @ 1k

MAX6733A

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

Push-Pull

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

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

1s to 2s
>2s

2.5

$1.63 @ 1k

See All Supervisors (2 Monitored Voltages) (84)

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)

Price^**

MAX6734A

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

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

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

1s to 2s
>2s

Adjustable Reset Input
Manual Reset

2.5

$1.79 @ 1k

MAX6735A

Push-Pull

$1.79 @ 1k

See All Supervisors (3 Monitored Voltages) (32)

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.