# L6364Q

**STMicroelectronics** · Interface - Specialized · QFN-20(4x4)

L6364Q from STMicroelectronics, in a QFN-20(4x4). 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 | VDIG | power_in | Supply for IC internal IO level shifting logic; compatible with 2.5V to 5.5V |
| 2 | V3V3 | power_in | 3.3V voltage supply with absolute maximum -1V to 5V |
| 3 | V5V | power_in | 5V sensor and microcontroller supply with absolute maximum -1V to 7V |
| 4 | GND | power_in | Ground reference connection |
| 5 | VDCDC | power_out | DC-DC converter output voltage 5V to 10.5V configurable at 0.5MHz to 2MHz frequency |
| 6 | LED1 | output | LED1 driver source current output with configurable up to 8mA maximum |
| 7 | LED2 | output | LED2 driver source current output with configurable up to 8mA maximum |
| 8 | LOUT | bidirectional | Inductor node connection for internal DC-DC converter switching network |
| 9 | DOUT | bidirectional | VPLUS following output with integrated reverse polarity diode and 8V Zener limits for inductive load demagnetization |
| 10 | CTLD | input | Direct control input for DIO output stage configuration when external control mode enabled |
| 11 | VPLUS | power_in | Main supply input voltage 5V to 35V with absolute maximum -35V to +35V |
| 12 | N/C | unconnected | Not connected |
| 13 | DIO | bidirectional | Data I/O line with 100ns switching time (2kΩ//2.2nF load) and configurable output stages (PNP, NPN, push-pull) |
| 14 | CQ | bidirectional | Line data signal with 100ns switching time, 5Ω output resistance, and current limit reporting 0.11A to 0.25A |
| 15 | PGND | power_in | Switch ground return with full zero current reverse polarity protection between VPLUS, CQ, DIO, and PGND |
| 16 | INT | output | Interrupt output to microcontroller signaling short-circuit, overtemperature, data, or undervoltage events |
| 17 | MOSI | input | SPI data input from microcontroller to L6364 |
| 18 | MISO | tri_state | SPI data output from L6364 to microcontroller with tristate function |
| 19 | SS | input | SPI slave select input for frame synchronization |
| 20 | SCK | input | SPI interface clock input signal |
| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | QFN-20(4x4) |
| Category | Interface |
| Pins | 21 |

## CAD (KiCad official)

- Symbol: `L6364Q`
- Footprint: `Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm`
- 3D model: QFN-20(4x4) (KiCad packages3D, STEP)
- 3D model files: `l6364q-etched.step` / `l6364q-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `l6364q.step` / `l6364q.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589834491721658368) (60 pp, sha256 `a93a7e14c17745e5`, retrieved 2026-10-07, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/l6364q-datasheet.pdf)