Maxim Integrated MAX823MEUK, Simple Reset/Power-On Reset IC, Active Low, Push-Pull Output, 4.38V Threshold, 140ms Minimum Reset Timeout, SC-74A/SOT-753, SOT-23-5, -40°C to 125°C.
| Parameter | Value |
|---|---|
| Type | Simple Reset/Power-On Reset |
| Mounting | Surface Mount |
| Voltage - threshold | 4.38V |
| Number of voltages monitored | 1 |
| Operating temperature | -40°C ~ 125°C (TA) |
| Reset | Active Low |
| Output | Push-Pull, Totem Pole |
| Package | Bulk |
| Reset timeout | 140ms Minimum |
| Case | SC-74A, SOT-753 |
The MAX823MEUK comes in a 5-pin SOT-23 package. It is a surface-mount device. The push-pull output means the reset pin connects directly to the processor reset input without an external pull-up.
There is no last-time-buy or obsolescence risk for new designs. However, the part is RoHS non-compliant, which restricts its use in products destined for RoHS-regulated regions unless an exemption applies.
The MAX823SEUK is a pin-compatible sibling with a different reset threshold — the SEUK variant monitors a 2.93V threshold, while the MEUK monitors 4.38V. They share the same SOT-23-5 package and pinout, so a board designed for one can accept the other, but the threshold must match the supply rail being monitored. For a 3.3V rail, use the SEUK; for a 5V rail, use the MEUK.
The listed type is Simple Reset/Power-On Reset. It is a basic voltage supervisor that asserts a reset when the supply drops below the threshold and releases it after a fixed timeout once the supply recovers.