# TRF37C73IDSGR

**Texas Instruments** · RF Amplifiers · WSON-8-EP(2x2)

TRF37C73IDSGR from Texas Instruments, in a WSON-8-EP(2x2). 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 | VCC | power_in | DC power supply input; nominally 3.3V with operating range 3V to 3.45V. |
| 2 | RFIN | input | RF input internally matched to 50Ω; connect to source through DC-blocking capacitor. |
| 3 | NC | unconnected | No electrical connection; connect pad to GND for board level reliability. |
| 4 | NC | unconnected | No electrical connection; connect pad to GND for board level reliability. |
| 5 | PWDN | input | Power down control with internal pulldown resistor to GND; high logic level disables device. |
| 6 | NC | unconnected | No electrical connection; connect pad to GND for board level reliability. |
| 7 | RFOUT | output | RF output internally matched to 50Ω; connect to load through DC-blocking capacitor and to VCC through RF choke inductor. |
| 8 | NC | unconnected | No electrical connection; connect pad to GND for board level reliability. |
| 9 | GND | power_in | PowerPAD thermal pad for RF and DC ground; must be soldered to PCB ground plane for thermal and mechanical performance. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WSON-8-EP(2x2) |
| Category | Radio Frequency Chip/Antenna |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `TRF37C73IDSGR`
- Footprint: `Package_SON:WSON-8-1EP_2x2mm_P0.5mm_EP0.9x1.6mm`
- 3D model: WSON-8-EP(2x2) (KiCad packages3D, STEP)
- 3D model files: `trf37c73idsgr-etched.step` / `trf37c73idsgr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `trf37c73idsgr.step` / `trf37c73idsgr.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/trf37c73) (19 pp, sha256 `9a5d5bc01f7d2ea7`, retrieved 2026-10-07, 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-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/trf37c73idsgr-datasheet.pdf)