# TMS3705FDRQ1

**Texas Instruments** · RFID ICs · SOIC-16

TMS3705FDRQ1 from Texas Instruments, in a SOIC-16. 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 | SENSE | input | Input of the RF amplifier; the analog voltage must stay within -0.3 V to VDD + 0.3 V and the input current within ±5 mA. |
| 2 | SFB | output | Output of the RF amplifier; input current in case of overvoltage is limited to ±5 mA. |
| 3 | D_TST | output | Test output for digital signals; voltage must stay within -0.3 V to VDD + 0.3 V, overload clamping current within ±5 mA, and output current within -1 mA (IOH) to 1 mA (IOL). |
| 4 | A_TST | output | Test output for analog signals; voltage must stay within -0.3 V to VDD + 0.3 V and input current within ±5 mA. |
| 5 | ANT1 | output | Antenna output 1 (driver output); output voltage must stay within -0.3 V to VDD + 0.3 V and output peak current is limited to ±1.1 A. |
| 6 | VSSA | power_in | Ground for the full bridge drivers; supply pins VDD, VSS/VSSB, VDDA and VSSA have a recommended range of 4.5 to 5.5 V (5 V nominal) and an absolute maximum of 7 V. |
| 7 | ANT2 | output | Antenna output 2 (driver output); output voltage must stay within -0.3 V to VDD + 0.3 V and output peak current is limited to ±1.1 A. |
| 8 | VDDA | power_in | Voltage supply for the full bridge drivers; recommended 4.5 to 5.5 V (5 V nominal), absolute maximum 7 V. |
| 9 | VDD | power_in | Voltage supply for nonpower blocks; recommended 4.5 to 5.5 V (5 V nominal), absolute maximum 7 V. |
| 10 | OSC2 | output | Oscillator output; voltage must stay within -0.3 V to VDD + 0.3 V. |
| 11 | OSC1 | input | Oscillator input; voltage must stay within -0.3 V to VDD + 0.3 V, with VIH of 0.7 VDD and VIL of 0.3 VDD, and oscillator frequency of 4 MHz. |
| 12 | VSS/VSSB | power_in | Ground for nonpower blocks and PLL. |
| 13 | NC | unconnected | Not connected. |
| 14 | SCIO | output | Data output to the microcontroller; voltage must stay within -0.3 V to VDD + 0.3 V, with output current of -1 mA (IOH) and 1 mA (IOL) and overload clamping current within ±5 mA. |
| 15 | F_SEL | input | Control input for frequency selection (default high); VIH is 0.7 VDD and VIL is 0.2 VDD, with input voltage limited to -0.3 V to VDD + 0.3 V. |
| 16 | TXCT | input | Control input from the microcontroller (default high); VIH is 0.7 VDD and VIL is 0.3 VDD, with input voltage limited to -0.3 V to VDD + 0.3 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16 |
| Category | RF And Wireless |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `TMS3705FDRQ1`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files: `tms3705fdrq1-etched.step` / `tms3705fdrq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tms3705fdrq1.step` / `tms3705fdrq1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8581800818231660544) (26 pp, sha256 `d1037db995b710cf`, retrieved 2026-10-10, 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/tms3705fdrq1-datasheet.pdf)