MAX6324
µP Supervisory Circuits with Windowed (Min/Max) Watchdog and Manual Reset
Industry's-First µP Supervisory with Windowed Watchdog and Manual Reset
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Overview
Features and Benefits
- 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 VCC = +1.2V
- AEC-Q100 Qualified MAX6324HUT44/V+T
Product Details
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 VCC = +1.2V.
The active-low RESET output is either push-pull (MAX6323) or open-drain (MAX6324). active-low RESET is asserted low when VCC 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 VCC 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).
Applications
- Automotive
- Embedded Control Systems
- Industrial
- Medical
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
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SPICE Models
LIB
MAX6324 SPICE Macro Model
12.43K
Product Recommendations
MAX6324 Companion Parts
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