MAX6323, MAX6324 微处理器监控电路，窗式(最小/最大)看门狗定时及手动复位

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The MAX6323/MAX6324 microprocessor (µP) supervisory circuits monitor power supplies and µP activity in digital systems. A watchdog timer looks for activity outside an expected window of operation. Six laser-trimmed reset thresholds are available with ±2.5% accuracy from +2.32V to +4.63V. Valid active-low RESET output is guaranteed down to V_CC = +1.2V.

The active-low RESET output is either push-pull (MAX6323) or open-drain (MAX6324). active-low RESET is asserted low when V_CC falls below the reset threshold, or when the manual reset input (active-low MR) is asserted low. active-low RESET remains asserted for at least 100ms after V_CC rises above the reset threshold and active-low MR is deasserted.

The watchdog pulse output (active-low WDPO) utilizes an open-drain configuration. It can be triggered either by a fast timeout fault (watchdog input pulses are too close to each other) or a slow timeout fault (no watchdog input pulse is observed within the timeout period). The watchdog timeout is measured from the last falling edge of watchdog input (WDI) with a minimum pulse width of 300ns. Active-low WDPO is asserted for 1ms when a fault is observed. Eight laser-trimmed timeout periods are available.

The MAX6323/MAX6324 are offered in a 6-pin SOT23 package and operate over the extended temperature range (-40°C to +125°C).

关键特性

应用/使用

Min/Max (Windowed) Watchdog, 8 Factory-Trimmed Timing Options
Pulsed Open-Drain, Active-Low Watchdog Output
Power-On Reset
Precision Monitoring of +2.5V, +3.0V, +3.3V, and +5.0V Power Supplies
Open-Drain or Push-Pull active-low RESET Outputs
Low-Power Operation (23µA typ)
Debounced Manual Reset Input
Guaranteed Reset Valid to V_CC = +1.2V

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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^**

MAX6323

2.5 to 3.3
3.3 to 5.5

Push-Pull

85ms to 300ms

Input/Output (WDI/WDO)
Windowed

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

Manual Reset

1.5

Yes

Automotive - General

SOT-23/6

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

$1.50 @ 1k

MAX6324

Open Drain

$1.50 @ 1k

See All Supervisors (1 Monitored Voltage) (268)

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.