MAX6746, MAX6747, MAX6748, MAX6749, MAX6750, MAX6751, MAX6752, MAX6753 微处理器复位电路，提供电容可调的复位/看门狗延迟时间

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MAX6746–MAX6753是低功耗、微处理器(µP)监控电路，用于监视1.575V至5V单/双路系统电源电压，并提供稳定的复位输出和看门狗功能。当V_CC电源电压或RESET IN跌至复位门限以下或手动复位被拉至低电平时，这些器件会触发复位。在V_CC和RESET IN上升至复位门限以上后，复位信号在一个复位超时周期内仍保持复位有效。复位功能不受电源瞬变影响。

MAX6746–MAX6753具有精度为±2%的工厂预置复位门限，范围1.575V至5.0V，级差100mV。

复位和看门狗延时可通过外部电容调节。MAX6746–MAX6751带有一个看门狗选择输入引脚，能够使看门狗超时周期扩展128倍。MAX6752/MAX6753带有窗式看门狗定时器，用于检测是否超出预期的工作窗口。

MAX6746–MAX6753具有推挽式或漏极开路/RESET输出。MAX6746–MAX6753采用8引脚SOT23封装，工作于汽车级温度范围(-40°C至+125°C)。

关键特性

应用/使用

	工厂预置复位门限，范围1.575V至5V，级差100mV
	可调复位门限选项
	单/双路电压监视
	电容可调复位超时周期
	电容可调看门狗超时周期
	最小/最大(加窗)看门狗选项
	手动复位输入选项
	V_CC ≥ 1V时保证/RESET正常输出
	3.7µA电源电流
	推挽式或漏极开路/RESET输出选项
	不受电源瞬变影响
	小尺寸、8引脚SOT23封装

	汽车
	电池供电计算机/控制器
	计算机
	精确的µP监视
	嵌入式控制器
	智能仪表
	医疗装置
	便携式设备
	机顶盒

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

Industry Qualified

Package

Operating Temp. Range (°C)

Price^**

MAX6746

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
<1ms
>1s
Adjustable

Input (WDI)
Cap Adjustable

1s to 2s
<1s
>2s
Adjustable

Manual Reset

Yes

Automotive - General

SOT-23/8

-40 to +125
-40 to +85
0 to +70

$1.20 @ 1k

MAX6747

Open Drain

Input (WDI)
Cap Adjustable

Manual Reset

$1.20 @ 1k

MAX6748

Push-Pull

Input (WDI)
Cap Adjustable

Adjustable Reset Input

$1.20 @ 1k

MAX6749

Open Drain

Input (WDI)
Cap Adjustable

Adjustable Reset Input

$1.20 @ 1k

MAX6752

Push-Pull

Input (WDI)
Cap Adjustable
Windowed

$1.50 @ 1k

MAX6753

Open Drain

Input (WDI)
Cap Adjustable
Windowed

$1.50 @ 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

Supervisor Features

Reset Thresh. Acc. (% @+25°C)

Max. I_CC (µA)

RoHS Available

Industry Qualified

Package

Operating Temp. Range (°C)

Price^**

MAX6750

Factory Fixed
R/C Adjustable

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
<1ms
>1s
Adjustable

Input (WDI)
Cap Adjustable

1s to 2s
<1s
>2s
Adjustable

Adjustable Reset Input

Yes

Automotive - General

SOT-23/8

-40 to +125
-40 to +85
0 to +70

$1.50 @ 1k

MAX6751

Open Drain

$1.50 @ 1k

See All Supervisors (2 Monitored Voltages) (70)

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.