DG449DS-T1-E3 from Vishay, in a SOT-23-8. 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	COM	passive	Switch common terminal. Connects to either NO or NC depending on IN logic level. Rail-to-rail analog signal handling within the (V-, V+) range.
2	NC	passive	Normally-closed switch terminal. Connected to COM when IN = logic 0 (≤ 0.8 V); disconnected when IN = logic 1 (≥ 2.4 V). 38 Ω typical on-resistance.
3	GND	power_in	Ground / logic reference. Maximum 25 V referenced to V-.
4	V+	power_in	Positive supply input. +7 V to +36 V single-supply, or +4.5 V to +20 V dual-supply. Maximum 44 V referenced to V-.
5	N.C.	unconnected	No internal connection. Leave floating or tie to a convenient node; do not use for signal routing.
6	IN	input	Digital logic control input, TTL/CMOS compatible. VIL ≤ 0.8 V selects NC path (COM↔NC); VIH ≥ 2.4 V selects NO path (COM↔NO). Input current ±1 µA max.
7	V-	power_in	Negative supply input. Tie to GND for single-supply operation (+7 V to +36 V on V+), or -4.5 V to -20 V for dual-supply operation.
8	NO	passive	Normally-open switch terminal. Connected to COM when IN = logic 1 (≥ 2.4 V); disconnected when IN = logic 0 (≤ 0.8 V). 38 Ω typical on-resistance.

Key specifications

Parameter	Value
Manufacturer	Vishay
Package	SOT-23-8
Category	Interface
Pins	8

Ordering variants

Same part, different packaging or reel option.

DG449DS-T1-E3

CAD (KiCad official)

Symbol: DG449DS-T1-E3
Footprint: Package_TO_SOT_SMD:SOT-23-8
3D model: SOT-23-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`dg449ds-t1-e3.step`	123 KB	You want the bare part, or you mark your own boards.
`dg449ds-t1-e3-etched.step`	2.3 MB	You want the part with `DG449DS-T1-E3` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 573 faces against 147 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: Vishay datasheet (10 pp, sha256 ae0e332c0ed79827, 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