Device identity and threshold
The MAX821LUS+T: The active-low, push-pull output asserts reset when the monitored supply falls below this threshold and releases after a user-adjustable reset timeout period.

Analog Devices MAX821LUS+T Simple Reset/Power-On Reset IC, Active Low, Push-Pull Output, 4.63V Threshold, SOT-143-4, -40°C to 125°C.
| Parameter | Value |
|---|---|
| Type | Simple Reset/Power-On Reset |
| Mounting | Surface Mount |
| Voltage - threshold | 4.63V |
| Number of voltages monitored | 1 |
| Operating temperature | -40°C ~ 125°C (TA) |
| Reset | Active Low |
| Output | Push-Pull, Totem Pole |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Reset timeout | Adjustable/Selectable |
| Case | TO-253-4, TO-253AA |
The MAX821LUS+T: The active-low, push-pull output asserts reset when the monitored supply falls below this threshold and releases after a user-adjustable reset timeout period.
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The reset output is active-low, push-pull (totem pole). It drives a logic low on reset assertion and actively pulls high when the monitored voltage is above the threshold.