# BL8518CB3TR263DC

**BL Shanghai Belling** · Supervisor and Reset ICs · SOT-23

BL8518CB3TR263DC from BL Shanghai Belling, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VSS | power_in | Ground reference pin. Tie to system 0 V / GND. |
| 2 | VOUT | output | Voltage-detection output, active-low CMOS push-pull (C suffix). Drives low (VSS) when VDD falls below the 2.63 V detector threshold, and returns high (equal to VDD) after Tdelay = 200 ms typical once VDD rises above the threshold. Output is undefined when VDD < VDDL (~0.5 V). |
| 3 | VDD | power_in | Supply voltage input and monitored rail. Recommended operating range 1.2 V to 6 V; absolute maximum 8 V. This is also the voltage being sensed against the internal 2.63 V threshold. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BL Shanghai Belling |
| Package | SOT-23 |
| Category | PMIC |
| Pins | 3 |

## Ordering variants

Same part, different packaging or reel option.

- `BL8518CB3TR263DC`
- `BL8518CB3TR263DN`
- `BL8518CB3TR293DC`
- `BL8518CB3TR293DN`
- `BL8518CB3TR263DCCB3BTR263DC`
- `BL8518CB3TR263DCCB3BTR263DN`
- `BL8518CB3TR263DCCB3BTR293DC`
- `BL8518CB3TR263DCCB3BTR293DN`

## CAD (KiCad official)

- Symbol: `BL8518CB3TR263DC`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bl8518cb3tr263dc-etched.step` / `bl8518cb3tr263dc-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bl8518cb3tr263dc.step` / `bl8518cb3tr263dc.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [BL Shanghai Belling datasheet](docs/bl8518cb3tr263dc-datasheet.pdf) (7 pp, sha256 `4f4f63773eb3a024`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/bl8518cb3tr263dc-datasheet.pdf)