MAX6826, MAX6827, MAX6828, MAX6829, MAX6830, MAX6831 双路、超低电压、SOT23封装、微处理器监控电路，带有手动复位及看门狗定时器

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The MAX6826—MAX6831 are ultra-low-voltage microprocessor (µP) supervisory circuits designed to monitor two power supplies and have manual reset and watchdog input functions. These devices assert a system reset if any of the monitored supplies fall below the preprogrammed thresholds, and maintain reset for a minimum timeout period after the supplies rise above the threshold. Microprocessor supervisors significantly improve system reliability and accuracy compared to separate ICs or discrete components. These devices monitor primary voltages from +1.8V to +5.0V and secondary voltages from +0.9V to +2.5V. These devices are guaranteed to be in the correct state for V_CC down to +1.0V.

A variety of preprogrammed reset threshold voltages are available (see the Threshold Suffix Guide). The devices include manual reset and watchdog inputs. The MAX6829/MAX6830/MAX6831 provide a factory-trimmed threshold to monitor a 2nd voltage down to +0.9V. The MAX6826/MAX6829 have a push-pull active-low RESET, the MAX6827/MAX6830 have a push-pull RESET and the MAX6828/MAX6831 have an open-drain active-low RESET. The MAX6826/MAX6827/MAX6828 have an auxiliary monitor that allows user adjustable input to monitor voltages down to +0.6V. See Selector Guide for functions available.

关键特性

应用/使用

Monitor Primary V_CC Supplies from +1.8V to +5.0V and Secondary V_CC2 Supplies from +0.9V to +2.5V
User Adjustable RESET IN Down to +0.63V (MAX6826/MAX6827/MAX6828)
140ms (min) Reset Timeout Delay
1.6s Watchdog Timeout Period
Manual Reset Input
Three Reset Output Options

Push-Pull active-low RESET
Push-Pull RESET
Open-Drain active-low RESET

Guaranteed Reset Valid Down to V_CC = +1.0V
Immune to Short Negative V_CC Transients
No External Components
Small 6-pin SOT23 Packages

	汽车系统
	精确的µP监视
	嵌入式控制器
	智能仪表
	多电压系统
	便携式/电池供电设备

Key Specifications: Supervisors (2 Monitored Voltages)

Part Number

Interface

Reset Threshold Range (V)

Active-Low Reset Output

Active-High 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

Smallest Available Package (max w/pins) (mm²)

Operating Temp. Range (°C)

Price^**

MAX6826

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

85ms to 300ms

Input (WDI)

1s to 2s

Adjustable Reset Input
Manual Reset

2.5

Yes

Automotive - General

SOT-23/6

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

$1.73 @ 1k

MAX6827

Push-Pull

Adjustable Reset Input
Manual Reset

$1.73 @ 1k

MAX6828

Open Drain

Adjustable Reset Input
Manual Reset

$1.73 @ 1k

MAX6829

Push-Pull

Manual Reset

$1.73 @ 1k

MAX6830

Push-Pull

Manual Reset

$1.73 @ 1k

MAX6831

Open Drain

Manual Reset

$1.73 @ 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.