# TPS3307-33D

**Texas Instruments** · Supervisor And Reset ICs · SOIC-8

TPS3307-33D from Texas Instruments, in a SOIC-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 | SENSE1 | input | Sense voltage input 1; for the TPS3307-33 it supervises the nominal 5V rail with a typical threshold VIT of 4.55V, and its input range is 0 to (VDD+0.3V)×VIT/1.25V. |
| 2 | SENSE2 | input | Sense voltage input 2; for the TPS3307-33 it supervises the nominal 3.3V rail with a typical threshold VIT of 2.93V, and its input range is 0 to (VDD+0.3V)×VIT/1.25V. |
| 3 | SENSE3 | input | Sense voltage input 3; user-defined monitor with a typical threshold of 1.25V set by an external resistor divider, with input range 0 to VDD+0.3V. |
| 4 | GND | power_in | Ground reference; all device voltage values are specified with respect to GND. |
| 5 | RESET | output | Active-low reset output that goes low while any SENSEn input is below its threshold VIT- or while MR is low, and returns high after the 200ms typical delay time once all SENSEn inputs are above VIT+. |
| 6 | RESET | output | Active-high reset output, the complement of the active-low RESET output on pin 5. |
| 7 | MR | input | Manual reset input; a low level causes RESET to become active, with VIH minimum of 0.7×VDD, VIL maximum of 0.3×VDD, and input range 0 to VDD+0.3V. |
| 8 | VDD | power_in | Supply voltage, recommended operating range 2V to 6V, with absolute maximum of 7V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `TPS3307-33D`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `tps3307-33d-etched.step` / `tps3307-33d-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps3307-33d.step` / `tps3307-33d.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/tps3307) (22 pp, sha256 `cc50811719ab77fb`, retrieved 2026-10-12, tier: lcsc)
- **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/tps3307-33d-datasheet.pdf)