DG444DY-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 control input for switch 1. TTL/CMOS compatible: logic '0' ≤ 0.8 V (switch on for DG444), logic '1' ≥ 2.4 V (switch off for DG444).
2	D1	passive	Drain terminal of analog switch 1. Bidirectional analog signal path; conducts equally in both directions when on. Analog signal range ±15 V (dual supply).
3	S1	passive	Source terminal of analog switch 1. Bidirectional analog signal path paired with D1 through the switch (RDS(on) ≈ 50 Ω typ).
4	V-	power_in	Negative analog supply. Dual-supply operation -5 V to -20 V (typ -15 V); tie to GND for single-supply operation. Absolute max V+ to V- = 44 V; GND to V- = 25 V.
5	GND	power_in	Ground / analog reference.
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.
8	IN4	input	Digital control input for switch 4. TTL/CMOS compatible: logic '0' ≤ 0.8 V, logic '1' ≥ 2.4 V.
9	IN3	input	Digital control input for switch 3. TTL/CMOS compatible: logic '0' ≤ 0.8 V, logic '1' ≥ 2.4 V.
10	D3	passive	Drain terminal of analog switch 3. Bidirectional analog signal path.
11	S3	passive	Source terminal of analog switch 3. Bidirectional analog signal path paired with D3.
12	VL	power_in	Logic supply voltage. Sets logic threshold; typical +5 V. Range (GND - 0.3 V) to (V+ + 0.3 V) absolute max.
13	V+	power_in	Positive analog supply. Single-supply +5 V to +36 V, or dual-supply +5 V to +20 V (typ +15 V). V+ to V- absolute max = 44 V.
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.
16	IN2	input	Digital control input for switch 2. TTL/CMOS compatible: logic '0' ≤ 0.8 V, logic '1' ≥ 2.4 V.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

DG444DY-T1-E3
DG444DY-T1-E3DJ

CAD (KiCad official)

Symbol: DG444DY-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
`dg444dy-t1-e3.step`	217 KB	You want the bare part, or you mark your own boards.
`dg444dy-t1-e3-etched.step`	2.3 MB	You want the part with `DG444DY-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: 617 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 b9eeefb3fe45570b, 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