LF347DT from STMicroelectronics, in a SOIC-14. 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	OUT1	output	Output of op-amp 1.
2	IN1-	input	Inverting input of op-amp 1. High-impedance JFET input.
3	IN1+	input	Non-inverting input of op-amp 1. High-impedance JFET input.
4	VCC+	power_in	Positive supply voltage. Absolute maximum +/-18 V (LF347: split supplies typ. +/-15 V). Shared by all four amplifiers.
5	IN2+	input	Non-inverting input of op-amp 2. High-impedance JFET input.
6	IN2-	input	Inverting input of op-amp 2. High-impedance JFET input.
7	OUT2	output	Output of op-amp 2.
8	OUT3	output	Output of op-amp 3.
9	IN3-	input	Inverting input of op-amp 3. High-impedance JFET input.
10	IN3+	input	Non-inverting input of op-amp 3. High-impedance JFET input.
11	VCC-	power_in	Negative supply voltage. Absolute maximum +/-18 V (LF347: split supplies typ. +/-15 V). Shared by all four amplifiers.
12	IN4+	input	Non-inverting input of op-amp 4. High-impedance JFET input.
13	IN4-	input	Inverting input of op-amp 4. High-impedance JFET input.
14	OUT4	output	Output of op-amp 4.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	SOIC-14
Category	Op-amp/Cmp
Pins	14

Ordering variants

Same part, different packaging or reel option.

LF347DTD
LF347DT
LF347DTN

CAD (KiCad official)

Symbol: LF347DT
Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
3D model: SOIC-14 (KiCad packages3D, STEP)

Provenance

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

Datasheet: STMicroelectronics datasheet (10 pp, sha256 556fb7d5f3029d7c, 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