# TPS3840PH18DBVR

**Texas Instruments** · Supervisor And Reset ICs · SOT-23-5

TPS3840PH18DBVR from Texas Instruments, in a SOT-23-5. 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 | RESET | output | Active-high push-pull reset output (TPS3840PH variant): driven high when MR is pulled low or VDD falls below the negative threshold VIT-, and held high for the reset delay tD after release. |
| 2 | VDD | power_in | Supply voltage input and monitored voltage; operating range is 1.5 V to 10 V, with an absolute maximum of 12 V. |
| 3 | GND | power_in | Ground reference pin for the device. |
| 4 | MR/NC | input | Active-low manual reset input: pulling it below V_MR_L (600 mV max) asserts RESET, it must not exceed VDD, and it may be left floating (NC) since it has an internal 100 kΩ pull-up to VDD. |
| 5 | CT | passive | Capacitor delay-time pin: a capacitor from CT to GND programs the reset delay tD (up to 10 µF recommended), and leaving it open gives the minimum fixed delay of 50 µs. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `TPS3840PH18DBVR`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `tps3840ph18dbvr-etched.step` / `tps3840ph18dbvr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps3840ph18dbvr.step` / `tps3840ph18dbvr.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/tps3840) (50 pp, sha256 `0e64fce6bd716dc3`, retrieved 2026-10-11, tier: lcsc)
- **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/tps3840ph18dbvr-datasheet.pdf)