DG441DY-T1-E3 from Vishay, in a SOIC-16. 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	IN1	input	Digital logic control input for switch 1. TTL/CMOS compatible (VIL ≤ 0.8 V, VIH ≥ 2.4 V). For DG441 (normally closed), logic 0 turns switch ON, logic 1 turns switch OFF.
2	D1	passive	Drain terminal of analog switch 1. Bidirectional analog signal path; conducts equally in both directions between D1 and S1 when the switch is ON. Signal range limited to V- ≤ Vsig ≤ V+.
3	S1	passive	Source terminal of analog switch 1. Bidirectional analog signal path paired with D1; RDS(on) ≈ 50 Ω typ with dual ±15 V supplies.
4	V-	power_in	Negative analog supply rail. Typically -15 V for dual-supply operation, or 0 V (tied to GND) for single-supply operation. V+ to V- limited to 44 V max.
5	GND	power_in	Digital / logic ground reference. GND-to-V- limited to 25 V max.
6	S4	passive	Source terminal of analog switch 4. Bidirectional analog signal path paired with D4.
7	D4	passive	Drain terminal of analog switch 4. Bidirectional analog signal path paired with S4.
8	IN4	input	Digital logic control input for switch 4. TTL/CMOS compatible; logic 0 turns DG441 switch ON (normally-closed part).
9	IN3	input	Digital logic control input for switch 3. TTL/CMOS compatible; logic 0 turns DG441 switch ON.
10	D3	passive	Drain terminal of analog switch 3. Bidirectional analog signal path paired with S3.
11	S3	passive	Source terminal of analog switch 3. Bidirectional analog signal path paired with D3.
12	NC	unconnected	No internal connection. Leave floating or tie to any convenient rail.
13	V+	power_in	Positive analog supply rail. Typically +15 V for dual-supply operation, up to about +13.2 V or +12 V for single-supply operation. V+ to V- limited to 44 V max.
14	S2	passive	Source terminal of analog switch 2. Bidirectional analog signal path paired with D2.
15	D2	passive	Drain terminal of analog switch 2. Bidirectional analog signal path paired with S2.
16	IN2	input	Digital logic control input for switch 2. TTL/CMOS compatible; logic 0 turns DG441 switch ON.

Key specifications

Parameter	Value
Manufacturer	Vishay
Package	SOIC-16
Category	Interface
Pins	16

Ordering variants

Same part, different packaging or reel option.

DG441DY-T1-E3
DG441DY-T1-E3DY-E3
DG441DY-T1-E3DJ
DG441DY-T1-E3DJ-E3

CAD (KiCad official)

Symbol: DG441DY-T1-E3
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOIC-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`dg441dy-t1-e3.step`	217 KB	You want the bare part, or you mark your own boards.
`dg441dy-t1-e3-etched.step`	2.3 MB	You want the part with `DG441DY-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: 610 faces against 267 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 (12 pp, sha256 d3ef9ff8d11f638b, 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