OPA277U from Texas Instruments, in a SOIC-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	Offset Trim	input	Input offset voltage trim pin. Connect a 10 kΩ potentiometer between pins 1 and 8 with the wiper to V- to adjust the initial input offset voltage. Leave floating if not used.
2	-In	input	Inverting input of the operational amplifier. High-impedance analog input with typical bias current of 1 nA maximum.
3	+In	input	Noninverting input of the operational amplifier. High-impedance analog input with typical bias current of 1 nA maximum.
4	V-	power_in	Negative (lowest) power supply. Operating range from -2 V to -18 V for split-supply operation, referenced to V+ across a total supply of 4 V to 36 V.
5	NC	unconnected	No internal connection. Can be left floating.
6	Output	output	Operational amplifier output. Class-AB output stage capable of driving typical loads with low distortion; short-circuit protected.
7	V+	power_in	Positive (highest) power supply. Operating range from +2 V to +18 V for split-supply operation; total V+ to V- supply span 4 V to 36 V.
8	Offset Trim	input	Input offset voltage trim pin. Connect a 10 kΩ potentiometer between pins 1 and 8 with the wiper to V- to adjust the initial input offset voltage. Leave floating if not used.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-8
Category	Op-amp/Cmp
Pins	8

Ordering variants

Same part, different packaging or reel option.

OPA277UU
OPA277UP
OPA277UDRM

CAD (KiCad official)

Symbol: OPA277U
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (43 pp, sha256 0d85011c5df09178, 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