LSF0204PWR from Texas Instruments, in a TSSOP-14. 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	Vref_A	power_in	Reference supply voltage for the A-side (lower voltage domain). Operating range 0 V to 5.5 V (typical 0.8 V to 4.5 V). Also supplies the EN input circuit.
2	A1	bidirectional	Input/output 1 on the A-side (Vref_A voltage domain). Bidirectionally connected to B1 through the pass-transistor switch when EN is asserted.
3	A2	bidirectional	Input/output 2 on the A-side (Vref_A voltage domain). Bidirectionally connected to B2 through the pass-transistor switch when EN is asserted.
4	A3	bidirectional	Input/output 3 on the A-side (Vref_A voltage domain). Bidirectionally connected to B3 through the pass-transistor switch when EN is asserted.
5	A4	bidirectional	Input/output 4 on the A-side (Vref_A voltage domain). Bidirectionally connected to B4 through the pass-transistor switch when EN is asserted.
6	NC	unconnected	No connection. Not internally connected.
7	GND	power_in	Ground reference for the device.
8	EN	input	Switch enable input. On LSF0204 (PW suffix) EN is active-HIGH: HIGH enables the switches for bidirectional translation; LOW places all data pins in Hi-Z. On LSF0204D the polarity is inverted. Referenced to Vref_A; must be LOW during power-up to guarantee Hi-Z.
9	NC	unconnected	No connection. Not internally connected.
10	B4	bidirectional	Input/output 4 on the B-side (Vref_B voltage domain). Bidirectionally connected to A4 through the pass-transistor switch when EN is asserted.
11	B3	bidirectional	Input/output 3 on the B-side (Vref_B voltage domain). Bidirectionally connected to A3 through the pass-transistor switch when EN is asserted.
12	B2	bidirectional	Input/output 2 on the B-side (Vref_B voltage domain). Bidirectionally connected to A2 through the pass-transistor switch when EN is asserted.
13	B1	bidirectional	Input/output 1 on the B-side (Vref_B voltage domain). Bidirectionally connected to A1 through the pass-transistor switch when EN is asserted.
14	Vref_B	power_in	Reference supply voltage for the B-side (higher voltage domain). Operating range 0 V to 5.5 V (typical 1.8 V to 5.5 V). Must be >= Vref_A for proper level translation.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	TSSOP-14
Category	Logic
Pins	14

Ordering variants

Same part, different packaging or reel option.

LSF0204PWR
LSF0204PWRRGY
LSF0204PWRRGYR
LSF0204PWRRUT
LSF0204PWRRUTR
LSF0204PWRYZP
LSF0204PWRYZPR

CAD (KiCad official)

Symbol: LSF0204PWR
Footprint: Package_SO:TSSOP-14_4.4x5mm_P0.65mm
3D model: TSSOP-14 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lsf0204pwr.step`	194 KB	You want the bare part, or you mark your own boards.
`lsf0204pwr-etched.step`	2.4 MB	You want the part with `LSF0204PWR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 608 faces against 237 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: Texas Instruments datasheet (39 pp, sha256 d5d2cff66c18fc2d, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF