# MAX6324BUT29+T

**Maxim Integrated** · Monitors & Reset Circuits · SOT-23-6

MAX6324BUT29+T from Maxim Integrated, in a SOT-23-6. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | MR | input | Active-low manual reset input that asserts RESET low and clears the watchdog timer when pulled low for at least 1µs; it is internally pulled up to VCC, so it can be left unconnected or tied to VCC if unused. |
| 2 | GND | power_in | Ground reference for the device. |
| 3 | WDI | input | Watchdog input whose falling edges must arrive within the factory-trimmed window; edges that are too fast or too slow cause WDPO to pulse low for 1ms (typ). |
| 4 | VCC | power_in | Supply voltage input (operating range 1.2V to 5.5V) that also feeds the VCC reset monitor; bypass with at least 500pF in noisy systems. |
| 5 | WDPO | output | Open-drain watchdog pulse output that is pulsed low for 1ms (typ) on a fast or slow watchdog fault and is active only while RESET is high; connect a pullup to any supply up to +6V. |
| 6 | RESET | output | Active-low open-drain reset output that is asserted when VCC falls below VTH or MR is low and stays asserted for the reset timeout (at least 100ms) after VCC rises above VTH; connect a pullup to any supply up to +6V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Maxim Integrated |
| Package | SOT-23-6 |
| Category | Power Management ICs |
| Pins | 6 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Operating Voltage Range | VCC | 1.2 |  | 5.5 | V |  | 3 |
| Supply Current | ICC |  | 23 | 45 | µA | No load, RESET deasserted; VCC = 2.5V or 3.3V | 3 |
| Supply Current | ICC |  | 27 | 57 | µA | No load, RESET deasserted; VCC = 5.5 | 3 |
| Reset Threshold Voltage | VTH | 2.85 | 2.93 | 3 | V | MAX632_ _UT29 | 3 |
| Reset Timeout Delay | tRP | 100 | 180 | 280 | ms | RESET deasserted | 3 |
| WDPO, RESET Output Voltage VOL | VOL |  |  | 0.4 | V | ISINK = 1.2mA, VCC = 2.25V (MAX632_ _UT23, MAX632_ _UT26, MAX632_ _UT29, MAX632_ _UT31) | 3 |
| WDPO, RESET Output Leakage | ILKG |  |  | 1 | µA | VRESET = VWDPO = +5.5V, RESET, WDPO deasserted | 3 |
| Watchdog Timeout (Fast), suffix B | tWD1 | 10 |  | 15 | ms | Notes 2, 3; MAX632_BUT_ _ | 4 |
| Watchdog Timeout (Slow), suffix B | tWD2 | 100 |  | 150 | ms | Note 4; MAX632_BUT_ _ | 4 |
| Minimum Watchdog Input Pulse Width |  | 300 |  |  | ns |  | 4 |
| WDI Input Voltage VIH | VIH | 0.75 |  |  | x VCC |  | 4 |
| WDI Input Voltage VIL | VIL |  |  | 0.8 | V |  | 4 |
| WDI Input Current |  | -1.5 |  | -1 | µA | VWDI = 0V | 4 |
| WDI Input Current |  | 1 |  | 1.5 | µA | VWDI = VCC | 4 |
| WDPO Pulse Width |  | 0.5 | 1 | 3 | ms | VIL = 0.8V, VIH = 0.75V x VCC | 4 |
| MR Input Voltage VIH | VIH | 0.7 |  |  | x VCC |  | 4 |
| MR Input Voltage VIL | VIL |  |  | 0.3 | x VCC |  | 4 |
| MR Minimum Pulse Width |  | 1 |  |  | µs |  | 4 |
| MR Pullup Resistance |  | 50 |  | 85 | kΩ |  | 4 |
| VCC Absolute Terminal Voltage | VCC | -0.3 |  | 6 | V | with respect to GND | 2 |
| MR, WDI Terminal Voltage |  | -0.3 |  |  | V | with respect to GND; maximum is VCC + 0.3V (MAX6324) | 2 |
| WDPO, RESET Terminal Voltage (MAX6324) |  | -0.3 |  | 6 | V | with respect to GND | 2 |
| Input Current, VCC, WDI, MR |  |  |  | 20 | mA |  | 2 |
| Output Current, RESET, WDPO |  |  |  | 20 | mA |  | 2 |
| Rate of Rise, VCC |  |  |  | 100 | V/µs |  | 2 |
| Operating Temperature Range |  | -40 |  | 125 | °C |  | 2 |
| Junction Temperature |  |  |  | 150 | °C |  | 2 |
| Storage Temperature Range |  | -65 |  | 150 | °C |  | 2 |
| Lead Temperature (soldering, 10s) |  |  |  | 300 | °C | soldering, 10s | 2 |
| Soldering Temperature (reflow), Lead(Pb)-Free |  |  |  | 260 | °C |  | 2 |
| Soldering Temperature (reflow), Containing Lead |  |  |  | 240 | °C |  | 2 |
| Thermal Resistance, Junction to Case, Single-Layer Board | θJC |  | 80 |  | °C/W | JESD51-7, single-layer board | 2 |
| Thermal Resistance, Junction to Ambient, Multi-Layer Board | θJA |  | 115 |  | °C/W | JESD51-7, four-layer board | 2 |
| Thermal Resistance, Junction to Case, Multi-Layer Board | θJC |  | 80 |  | °C/W | JESD51-7, four-layer board | 2 |

## CAD (KiCad official)

- Symbol: `MAX6324BUT29+T`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `max6324but29-t-etched.step` / `max6324but29-t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `max6324but29-t.step` / `max6324but29-t.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Maxim Integrated datasheet](https://www.analog.com/media/en/technical-documentation/data-sheets/max6323-max6324.pdf) (14 pp, sha256 `fbe6156c96c1fb0f`, retrieved 2026-10-30, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/max6324but29-t-datasheet.pdf)