MCP6291T-E from Microchip, in a SOT-23-5. 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 internal connection. Pad may be left floating; not electrically bonded to the die.
2	VIN-	input	Inverting analog input of the op amp. High-impedance CMOS input with typical bias current of ±1 pA. Common-mode input range extends from VSS - 0.3V to VDD + 0.3V.
3	VIN+	input	Non-inverting analog input of the op amp. High-impedance CMOS input with typical bias current of ±1 pA. Rail-to-rail input capability across the supply range.
4	VSS	power_in	Negative power supply pin. Tied to ground in single-supply configuration. Must be 2.4V to 6.0V below VDD.
5	NC	unconnected	No internal connection. Pad may be left floating; not electrically bonded to the die.
6	VOUT	output	Low-impedance analog output. Rail-to-rail output swing (typically within 15 mV of the supply rails with a 10 kΩ load). Short-circuit current ±25 mA.
7	VDD	power_in	Positive power supply pin, 2.4V to 6.0V above VSS. Quiescent current 1.0 mA typical per amplifier. Requires a local 0.01-0.1 µF bypass capacitor within 2 mm plus a bulk 1 µF within 100 mm.
8	NC	unconnected	No internal connection. Pad may be left floating; not electrically bonded to the die.

Key specifications

Parameter	Value
Manufacturer	Microchip
Package	SOT-23-5
Category	Op-amp/Cmp
Pins	8

Ordering variants

Same part, different packaging or reel option.

MCP6291T-ESN
MCP6291T-EP
MCP6291T-EMS
MCP6291T-EOT

CAD (KiCad official)

Symbol: MCP6291T-E
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`mcp6291t-e.step`	85 KB	You want the bare part, or you mark your own boards.
`mcp6291t-e-etched.step`	1.7 MB	You want the part with `MCP6291T-E` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 424 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: Microchip datasheet (36 pp, sha256 55213facea60c43a, 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