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TRSF3223EIRGWR

Public Made by Adom

by adom

Texas Instruments RS232 ICs, VQFN-20(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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TRSF3223EIRGWR

Texas Instruments · RS232 ICs · VQFN-20(5x5)

TRSF3223EIRGWR from Texas Instruments, in a VQFN-20(5x5). 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 C1+ passive Positive terminal of charge-pump capacitor C1.
2 C1- passive Negative terminal of charge-pump capacitor C1.
3 C2+ passive Positive terminal of charge-pump capacitor C2.
4 C2- passive Negative terminal of charge-pump capacitor C2.
5 V- power_out Negative charge-pump output supply, bypassed with a capacitor; absolute maximum is -7 V.
6 DOUT2 output RS-232 driver 2 output, ±15 kV HBM ESD protected, with output swing of at least ±5 V into 3 kΩ.
7 RIN2 input RS-232 receiver 2 input, ±25 V input range, ±15 kV HBM ESD protected, with 3 kΩ to 5 kΩ input resistance.
8 ROUT2 output Logic-level receiver 2 output, high-impedance when EN is high.
9 INVALID output Valid-signal output that is high when any receiver input is beyond ±2.7 V and low when all receiver inputs stay within ±0.3 V for more than 30 µs.
10 DIN2 input Logic input for driver 2, accepting up to 5.5 V.
11 DIN1 input Logic input for driver 1, accepting up to 5.5 V.
12 FORCEON input Logic input that, when high with FORCEOFF high, disables auto-powerdown; low enables auto-powerdown when FORCEOFF is high.
13 ROUT1 output Logic-level receiver 1 output, high-impedance when EN is high.
14 RIN1 input RS-232 receiver 1 input, ±25 V input range, ±15 kV HBM ESD protected, with 3 kΩ to 5 kΩ input resistance.
15 DOUT1 output RS-232 driver 1 output, ±15 kV HBM ESD protected, with output swing of at least ±5 V into 3 kΩ.
16 GND power_in Ground; ±15 kV HBM ESD protected relative to the RS-232 pins.
17 VCC power_in Supply voltage of 3 V to 5.5 V, with 3.3 V ±0.3 V or 5 V ±0.5 V operating ranges; absolute maximum 6 V.
18 FORCEOFF input Active-low logic input that powers off drivers and charge pump when low, reducing supply current to about 1 µA.
19 EN input Active-low receiver enable input that places the receiver outputs in high impedance when high.
20 V+ power_out Positive charge-pump output supply, bypassed with a capacitor; absolute maximum is 7 V.
21 EP passive Exposed thermal pad that must be soldered to the PCB for optimal thermal and mechanical performance; the datasheet does not state its electrical connection.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package VQFN-20(5x5)
Category Interface
Pins 21

CAD (KiCad official)

  • Symbol: TRSF3223EIRGWR
  • Footprint: Package_DFN_QFN:QFN-20-1EP_5x5mm_P0.65mm_EP3.35x3.35mm
  • 3D model: VQFN-20(5x5) (KiCad packages3D, STEP)
  • 3D model files: trsf3223eirgwr-etched.step / trsf3223eirgwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); trsf3223eirgwr.step / trsf3223eirgwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (31 pp, sha256 12937657b0efb4a1, retrieved 2026-10-08, 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-sonnet-5-5 (text+vision), consensus claude-opus-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