# PT4455

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

PT4455 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 pin, connected to the crystal network (X1 with C1/C2) in the application circuit. |
| 2 | VSS | power_in | Ground connection for the device. |
| 3 | PAOUT | output | Power amplifier output pin that drives the RF output stage. |
| 4 | DIN | input | Data input pin for OOK/ASK modulation of the transmitter. |
| 5 | VDD | power_in | Power supply pin; the datasheet specifies an operating range of 2.2 V to 3.6 V. |
| 6 | XIN | input | Oscillator input pin, connected to the crystal network in the application circuit; a parallel resistor R5 (560K) can be populated across XIN to help oscillation with high crystal ESR. |

## 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 |
|---|---|---|---|---|---|---|---|
| Supply voltage operation range (VDD) |  | 2.2 |  | 3.6 | V | Low supply voltage, operation range (Features) | 1 |
| Transmitter frequency range |  | 300 |  | 450 | MHz | PLL-based transmitter frequency range (Features) | 1 |

## CAD (KiCad official)

- Symbol: `PT4455`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `pt4455-etched.step` / `pt4455-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pt4455.step` / `pt4455.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/8588881232440528896) (4 pp, sha256 `06c00f635e4983eb`, retrieved 2026-10-19, 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/pt4455-datasheet.pdf)