# THS4509RGTT

**Texas Instruments** · Low Noise Amplifiers (LNA) - RF · VQFN-16-EP(3x3)

THS4509RGTT from Texas Instruments, in a VQFN-16-EP(3x3). 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 | NC | unconnected | No internal connection on this pin. |
| 2 | VIN- | power_in | Inverting amplifier input, optimized for best performance with the common-mode voltage set to midsupply. |
| 3 | VOUT+ | output | Noninverting amplifier output; the output common-mode holds within 3 mV typical of the set voltage when set within 0.5 V of midsupply. |
| 4 | CM | input | Common-mode voltage input; the set point is midsupply by internal circuitry and may be overdriven from an external source, with a 0.1 µF capacitor to ground recommended near this pin. |
| 5 | VS+ | power_in | Positive amplifier power-supply input, with a recommended supply voltage of 3 V to 5.25 V. |
| 6 | VS+ | power_in | Positive amplifier power-supply input, with a recommended supply voltage of 3 V to 5.25 V. |
| 7 | VS+ | power_in | Positive amplifier power-supply input, with a recommended supply voltage of 3 V to 5.25 V. |
| 8 | VS+ | power_in | Positive amplifier power-supply input, with a recommended supply voltage of 3 V to 5.25 V. |
| 9 | CM | input | Common-mode voltage input; the set point is midsupply by internal circuitry and may be overdriven from an external source, with a 0.1 µF capacitor to ground recommended near this pin. |
| 10 | VOUT- | output | Inverted amplifier output. |
| 11 | VIN+ | power_in | Noninverting amplifier input. |
| 12 | PD | input | Power-down pin: logic low puts the part into low power mode, and logic high or open gives normal operation. |
| 13 | VS- | power_in | Negative amplifier power-supply input. |
| 14 | VS- | power_in | Negative amplifier power-supply input. |
| 15 | VS- | power_in | Negative amplifier power-supply input. |
| 16 | VS- | power_in | Negative amplifier power-supply input. |
| 17 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VQFN-16-EP(3x3) |
| Category | RF And Wireless |
| Pins | 17 |

## CAD (KiCad official)

- Symbol: `THS4509RGTT`
- Footprint: `Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm`
- 3D model: VQFN-16-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `ths4509rgtt-etched.step` / `ths4509rgtt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ths4509rgtt.step` / `ths4509rgtt.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/ths4509) (49 pp, sha256 `b09a8563f806730d`, retrieved 2026-10-11, 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/ths4509rgtt-datasheet.pdf)