# MAX6301CUA+T

**Maxim Integrated** · Monitors & Reset Circuits · MSOP-8

MAX6301CUA+T from Maxim Integrated, in a MSOP-8. 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 | RESET IN | input | High-impedance reset comparator input that connects to an external resistor divider, with VRST = 1.22 x (R1 + R2)/R2 and a reset input threshold of 1.22V typical. |
| 2 | GND | power_in | Ground reference for the device. |
| 3 | SRT | passive | Reset-timeout timing pin; a capacitor to ground sets tRP = 2.67 x CSRT (CSRT in pF, tRP in µs), and CSRT must be a low-leakage (<10nA) type. |
| 4 | SWT | passive | Watchdog-timeout timing pin; a capacitor to ground sets tWD = 2.67 x CSWT (CSWT in pF, tWD in µs), and connecting this pin to ground disables the watchdog. |
| 5 | WDS | input | Watchdog-select input: connect to GND for normal mode (basic timeout) or to VCC for extended mode, which multiplies the timeout by 500; a change of state resets the watchdog timer. |
| 6 | WDI | input | Watchdog input that must see a rising or falling transition within the watchdog timeout period or a reset pulse occurs; it must not be left unconnected in normal mode (WDS = GND). |
| 7 | RESET | output | Open-drain, active-low reset output on the MAX6301: it goes low when VIN falls below VRST and remains low for the reset timeout period after VIN exceeds VRST, and on a watchdog timeout it pulses low for tRP. |
| 8 | VCC | power_in | Supply voltage, specified 1.00V to 5.50V for the MAX6301C; bypass to ground with a 0.1µF capacitor placed as close as possible to the pin. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Maxim Integrated |
| Package | MSOP-8 |
| Category | Power Management ICs |
| Pins | 8 |

## 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 |  | 5.5 | V | MAX6301C/MAX6303C (Note 1) | 2 |
| Supply Current | ICC |  | 4 | 7 | µA | No load | 2 |
| Reset Input Threshold Voltage, falling | VTH | 1.195 | 1.22 | 1.245 | V | VRESET IN falling, VCC = 5.0V | 2 |
| Reset Input Threshold Voltage, rising | VTH |  | 1.24 | 1.265 | V | VRESET IN rising, VCC = 5.0V | 2 |
| Reset Input Leakage Current | IRESET IN | -1 | 0.01 | 1 | nA |  | 2 |
| Reset Output-Voltage Low | VOL |  |  | 0.4 | V | VCC ≥ 4.5V, ISINK = 3.2mA | 2 |
| Reset Output-Voltage Low | VOL |  |  | 0.3 | V | VCC = 1V, ISINK = 50µA, TA = 0°C to +70°C | 2 |
| Reset Timeout Period | tRP | 2.8 | 4 | 5.2 | ms | CSRT = 1500pF | 2 |
| Reset Output Leakage Current |  | -1 |  | 1 | µA | MAX6301, VRESET = VCC | 2 |
| WDI, WDS Input Threshold High | VIH | 0.7 |  |  | x VCC | WDI, WDS input threshold | 3 |
| WDI, WDS Input Threshold Low | VIL |  |  | 0.3 | x VCC | WDI, WDS input threshold | 3 |
| WDI Pulse Width | tWP | 30 |  |  | ns | VCC = 4.5V to 5.5V | 3 |
| WDI Pulse Width | tWP | 60 |  |  | ns | VCC = 2V to 4.5V | 3 |
| WDI, WDS Leakage Current |  | -1 |  | 1 | µA | Extended mode disabled | 3 |
| WDI Sink/Source Current |  | -70 |  | 70 | µA | Extended mode enabled (Note 4) | 3 |
| Watchdog Timeout Period | tWD | 2.8 | 4 | 5.2 | ms | WDS = GND, CSWT = 1500pF | 3 |
| Watchdog Timeout Period | tWD | 1.4 | 2 | 2.6 | s | WDS = VCC, CSWT = 1500pF | 3 |
| Reset Input Hysteresis | VHYST |  | 20 |  | mV |  | 2 |
| VCC to Reset Delay | tRD |  | 63 |  | µs | VCC falling at 1mV/µs | 2 |
| Reset Input Pulse Width | tRI |  | 26 |  | µs | Comparator overdrive = 50mV | 2 |
| Supply Voltage (VCC) absolute maximum | VCC | -0.3 |  | 7 | V |  | 2 |
| RESET IN, SWT, SRT voltage |  | -0.3 |  |  | V | Maximum is VCC + 0.3V | 2 |
| WDI, WDS voltage |  | -0.3 |  | 7 | V |  | 2 |
| RESET, RESET voltage (MAX6301) |  | -0.3 |  | 7 | V | MAX6301 | 2 |
| Input Current VCC |  | -20 |  | 20 | mA |  | 2 |
| Input Current GND |  | -20 |  | 20 | mA |  | 2 |
| Output Current RESET, RESET |  | -20 |  | 20 | mA |  | 2 |
| Operating Temperature Range | TA | 0 |  | 70 | °C | MAX630_C_A | 2 |
| Storage Temperature Range |  | -65 |  | 160 | °C |  | 2 |
| Lead Temperature (soldering) |  |  |  | 300 | °C | soldering, 10s | 2 |
| Soldering Temperature (reflow) |  |  |  | 260 | °C | Lead(Pb)-free | 2 |

## CAD (KiCad official)

- Symbol: `MAX6301CUA+T`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `max6301cua-t-etched.step` / `max6301cua-t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `max6301cua-t.step` / `max6301cua-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/max6301-max6304.pdf) (12 pp, sha256 `599e498038959b58`, 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/max6301cua-t-datasheet.pdf)