# PT4456

**PTC Princeton Tech** · RF Transceiver ICs · SOT-23-6

PT4456 from PTC Princeton Tech, in a SOT-23-6. 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 | XOUT | output | Oscillator output, the crystal driver pin of the on-chip oscillator (pin function as stated in the pin description table; no electrical limits are given for this pin). |
| 2 | VSS | power_in | Ground connection for the device. |
| 3 | PAOUT | output | Power amplifier output of the FSK transmitter. |
| 4 | DIN | input | Data input for the FSK modulation. |
| 5 | VDD | power_in | Power supply; the features list gives a 2.2 V to 3.6 V operation range. |
| 6 | XIN | input | Oscillator input of the on-chip oscillator, which connects to the crystal resonator. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | PTC Princeton Tech |
| Package | SOT-23-6 |
| Category | RF And Wireless |
| 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 |
|---|---|---|---|---|---|---|---|
| Operation supply voltage range (VDD) | VDD | 2.2 |  | 3.6 | V | Features list: 'Low supply voltage, 2.2 V to 3.6 V operation range' | 1 |
| PLL transmitter frequency range |  | 300 |  | 450 | MHz | Features list: 'PLL-based transmitter with frequency range from 300MHz to 450MHz' | 1 |

## CAD (KiCad official)

- Symbol: `PT4456`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `pt4456-etched.step` / `pt4456-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pt4456.step` / `pt4456.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [PTC Princeton Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586202488169517057) (4 pp, sha256 `1e2b01f6fdba1da3`, retrieved 2026-10-18, 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/pt4456-datasheet.pdf)