component
TRSF3221EIRGTR
Public Made by Adomby adom
Texas Instruments RS232 ICs, VQFN-16(3x3). Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads only if this page sits in the background.
PCB Footprint
Open full view ↗Loads on click. Unloads only if this page sits in the background.
Datasheet
Open in new tab ↗Loads on click. Unloads only if this page sits in the background.
README
markdownTRSF3221EIRGTR
Texas Instruments · RS232 ICs · VQFN-16(3x3)
TRSF3221EIRGTR from Texas Instruments, in a VQFN-16(3x3). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | C1- | passive | Negative lead of C1 capacitor; connects to external 0.1µF capacitor for 3.3V operation or 0.047µF for 5V operation. |
| 2 | C2+ | passive | Positive lead of C2 capacitor; connects to external 0.1µF capacitor for 3.3V operation or 0.33µF for 5V operation. |
| 3 | C2- | passive | Negative lead of C2 capacitor; connects to external 0.1µF capacitor for 3.3V operation or 0.33µF for 5V operation. |
| 4 | V- | power_out | Negative charge pump output for storage capacitor only; generates approximately -5.5V supply for external capacitor. |
| 5 | RIN | input | RS232 line data input from remote RS232 system; accepts RS-232 voltage levels from -25V to +25V. |
| 6 | ROUT | output | Logic data output to UART; high-level output voltage is VCC - 0.1V, low-level output voltage is 0.4V at 1.6mA load. |
| 7 | INVALID | output | Invalid output pin indicating receiver signal validity; outputs high when RIN input has valid RS-232 level or low when RIN input is unpowered. |
| 8 | DIN | input | Logic data input from UART; accepts 0V to VCC logic levels, or up to 5.5V when powered from 3.3V supply. |
| 9 | FORCEON | input | Automatic power-down control input; when low with FORCEOFF high, enables auto-powerdown mode to reduce supply current. |
| 10 | DOUT | output | RS232 line data output to remote RS232 system; outputs ±5V to ±5.4V at 3kΩ load impedance with slew rate 24V/µs to 150V/µs. |
| 11 | GND | power_in | Ground; electrical reference point for all signals, connect to system ground plane. |
| 12 | VCC | power_in | Supply voltage input; connect to external 3V to 5.5V power supply with 0.1µF bypass capacitor for bypass. |
| 13 | FORCEOFF | input | Automatic power-down control input; when high with FORCEON low, enables auto-powerdown mode to reduce supply current to 1µA. |
| 14 | EN | input | Receiver output enable input; low input enables receiver ROUT output, high input sets ROUT to high impedance. |
| 15 | V+ | power_out | Positive charge pump output for storage capacitor only; generates approximately +5.5V supply for external capacitor. |
| 16 | C1+ | passive | Positive lead of C1 capacitor; connects to external 0.1µF capacitor for 3.3V operation or 0.047µF for 5V operation. |
| 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(3x3) |
| Category | Interface |
| Pins | 17 |
CAD (KiCad official)
- Symbol:
TRSF3221EIRGTR - Footprint:
Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm - 3D model: VQFN-16(3x3) (KiCad packages3D, STEP)
- 3D model files:
trsf3221eirgtr-etched.step/trsf3221eirgtr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);trsf3221eirgtr.step/trsf3221eirgtr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (37 pp, sha256
7b871526ac20c19b, retrieved 2026-09-23, 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 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).