TC7SET17FU from TOSHIBA LJ CT, in a SOT-353-5. 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	NC	unconnected	No connection. Pin is not internally bonded; may be left floating or tied to ground for mechanical stability.
2	A	input	Schmitt-trigger buffer input. Positive threshold VP ≤ 2.1 V and negative threshold VN ≥ 0.5 V at VCC = 5.5 V, providing 0.4 V (min) of hysteresis for clean switching on noisy/slow edges. 5.5 V tolerant regardless of VCC.
3	GND	power_in	Ground reference (0 V) for the device.
4	Y	output	Non-inverting Schmitt-trigger buffer output. Follows the input logic level (Y = A per truth table). VOH ≥ 4.4 V at IOH = -50 µA and VOL ≤ 0.36 V at IOL = 8 mA (VCC = 4.5 V, Ta = 25 °C). TTL-compatible drive.
5	VCC	power_in	Positive supply voltage. Operating range 4.5 V to 5.5 V; absolute maximum 7.0 V. Bypass with a local decoupling capacitor to GND.

Key specifications

Parameter	Value
Manufacturer	TOSHIBA LJ CT
Package	SOT-353-5
Category	Logic
Pins	5

Ordering variants

Same part, different packaging or reel option.

TC7SET17FU

CAD (KiCad official)

Symbol: TC7SET17FU
Footprint: Package_TO_SOT_SMD:SOT-353_SC-70-5
3D model: SOT-353-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`tc7set17fu.step`	87 KB	You want the bare part, or you mark your own boards.
`tc7set17fu-etched.step`	1.5 MB	You want the part with `TC7SET17FU` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 384 faces against 102 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: TOSHIBA LJ CT datasheet (6 pp, sha256 4806c213d9386d8c, retrieved 2026-08-17, tier: lcsc)
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