# TPS389025QDSERQ1

**Texas Instruments** · Supervisor And Reset ICs · WSON-6(1.5x1.5)

TPS389025QDSERQ1 from Texas Instruments, in a WSON-6(1.5x1.5). 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 | SENSE | input | This pin is connected to the voltage to be monitored; RESET goes low when SENSE falls below the negative threshold VITN and goes high when it rises above the positive threshold VITP. |
| 2 | GND | power_in | Ground reference pin. |
| 3 | MR | input | Driving the manual reset pin MR low causes RESET to go low (assert). |
| 4 | VDD | power_in | Supply voltage pin with a recommended range of 1.5 V to 5.5 V; good analog practice is to place a 0.1-µF ceramic capacitor close to this pin. |
| 5 | CT | passive | User-adjustable delay pin; connecting a ground-referenced capacitor sets the RESET delay time to deassert, with tPD(r) (sec) = CCT (µF) × 1.07 + 25 µs (nom). |
| 6 | RESET | output | Open-drain output driven low when MR is low or SENSE is below VITN, requiring a pullup resistor from 10 kΩ to 1 MΩ. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WSON-6(1.5x1.5) |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Input supply voltage | VDD | 1.5 |  | 5.5 | V |  | 4 |
| SENSE input threshold voltage accuracy | VITN, VITP | -1 | 0.5 | 1 | % | over operating junction temperature range | 5 |
| Hysteresis | VHYST | 0.325 | 0.575 | 0.825 | % |  | 5 |
| Supply current into VDD pin | IDD |  | 2.09 | 3.72 | µA | VDD = 3.3 V, IRESET = 0 mA, -40°C < TJ < 85°C | 5 |
| Supply current into VDD pin | IDD |  |  | 4.5 | µA | VDD = 3.3 V, IRESET = 0 mA, -40°C < TJ < 105°C | 5 |
| Supply current into VDD pin | IDD |  |  | 5.8 | µA | VDD = 3.3 V, IRESET = 0 mA | 5 |
| Supply current into VDD pin | IDD |  | 2.29 | 4 | µA | VDD = 5.5 V, IRESET = 0 mA, -40°C < TJ < 85°C | 5 |
| Supply current into VDD pin | IDD |  |  | 5.2 | µA | VDD = 5.5 V, IRESET = 0 mA, -40°C < TJ < 105°C | 5 |
| Supply current into VDD pin | IDD |  |  | 6.5 | µA | VDD = 5.5 V, IRESET = 0 mA | 5 |
| CT pin charge current | ICT | 0.9 | 1.15 | 1.35 | µA |  | 5 |
| CT pin comparator threshold voltage | VCT | 1.17 | 1.23 | 1.29 | V |  | 5 |
| Low-level output voltage | VOL |  |  | 0.25 | V | VDD ≥ 1.5 V, IRESET = 0.4 mA | 5 |
| Low-level output voltage | VOL |  |  | 0.3 | V | VDD ≥ 4.5 V, IRESET = 3 mA | 5 |
| Open-drain output leakage | ILKG(OD) |  |  | 250 | nA | High impedance, VSENSE = VRESET = 5.5 V | 5 |
| Absolute max VDD voltage | VDD | -0.3 |  | 7 | V |  | 4 |
| Absolute max SENSE voltage | SENSE | -0.3 |  | 7 | V |  | 4 |
| Absolute max RESET voltage | RESET | -0.3 |  | 7 | V |  | 4 |
| Absolute max MR voltage | MR | -0.3 |  | 7 | V |  | 4 |
| Absolute max CT voltage | VCT | -0.3 |  | 7 | V |  | 4 |
| Absolute max RESET current | RESET | -20 |  | 20 | mA |  | 4 |
| Operating junction temperature | TJ | -40 |  | 125 | °C |  | 4 |
| Operating ambient temperature | TA | -40 |  | 125 | °C |  | 4 |
| Storage temperature | Tstg | -65 |  | 150 | °C |  | 4 |
| Power-supply voltage | VDD | 1.5 |  | 5.5 | V |  | 4 |
| SENSE voltage | VSENSE | 0 |  | 5.5 | V |  | 4 |
| RESET pin voltage | VRESET | 0 |  | 5.5 | V |  | 4 |
| RESET pin current | IRESET | -5 |  | 5 | mA |  | 4 |
| Input capacitor, VDD pin | CIN | 0 | 0.1 |  | µF |  | 4 |
| Reset timeout capacitor, CT pin | CCT | 0 |  | 26 | µF |  | 4 |
| Pullup resistor, RESET pin | RPU | 1 |  | 1000 | kΩ |  | 4 |
| Junction temperature (free-air) | TJ | -40 | 25 | 125 | °C |  | 4 |
| Negative threshold voltage | VITN |  | 2.4 |  | V | TPS389025-Q1 per device comparison table | 3 |
| Positive threshold voltage | VITP |  | 2.414 |  | V | TPS389025-Q1 per device comparison table | 3 |
| SENSE falling to RESET propagation delay | tPD(f) |  | 18 |  | µs | CT = open, VDD = 3.3 V | 5 |
| SENSE falling to RESET propagation delay | tPD(f) |  | 8 |  | µs | CT = open, VDD = 5.5 V | 5 |
| SENSE rising to RESET propagation delay | tPD(r) |  | 25 |  | µs | CT = open, VDD = 3.3 V | 5 |
| SENSE pin glitch immunity | tGI(SENSE) |  | 9 |  | µs | VDD = 5.5 V | 5 |
| MR pin glitch immunity | tGI(MR) |  | 100 |  | ns | VDD = 5.5 V | 5 |
| MR pin pulse duration to assert RESET | tMRW |  | 1 |  | µs |  | 5 |
| MR pin low to out delay | td(MR) |  | 250 |  | ns |  | 5 |
| Startup delay | tSTRT |  | 325 |  | µs |  | 5 |
| Junction-to-ambient thermal resistance | RθJA |  | 321.3 |  | °C/W | DSE (WSON) 6 pins | 4 |
| Junction-to-case (top) thermal resistance | RθJC(top) |  | 207.9 |  | °C/W | DSE (WSON) 6 pins | 4 |
| Junction-to-board thermal resistance | RθJB |  | 281.5 |  | °C/W | DSE (WSON) 6 pins | 4 |
| Junction-to-top characterization parameter | ψJT |  | 42.4 |  | °C/W | DSE (WSON) 6 pins | 4 |
| Junction-to-board characterization parameter | ψJB |  | 284.8 |  | °C/W | DSE (WSON) 6 pins | 4 |
| Junction-to-case (bottom) thermal resistance | RθJC(bot) |  | 142.3 |  | °C/W | DSE (WSON) 6 pins | 4 |

## CAD (KiCad official)

- Symbol: `TPS389025QDSERQ1`
- Footprint: `Package_SON:WSON-6_1.5x1.5mm_P0.5mm`
- 3D model: WSON-6(1.5x1.5) (KiCad packages3D, STEP)
- 3D model files: `tps389025qdserq1-etched.step` / `tps389025qdserq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps389025qdserq1.step` / `tps389025qdserq1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/tps3890-q1) (27 pp, sha256 `df60d175a821bd24`, retrieved 2026-11-06, tier: manufacturer)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/tps389025qdserq1-datasheet.pdf)