THS4521IDGKR from Texas Instruments, in a MSOP-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	VIN-	input	Inverting amplifier input. Analog signal input to the negative side of the fully differential amplifier.
2	VOCM	input	Output common-mode voltage control input. Sets the DC common-mode level of the differential outputs; leave floating to self-bias at mid-supply.
3	VS+	power_in	Amplifier positive power-supply input. Total supply range VS+ to VS- of +2.5 V to +5.5 V (±1.25 V to ±2.75 V split supply). Bypass locally with 0.1 µF.
4	VOUT+	output	Noninverting amplifier output. Rail-to-rail differential output; pairs with VOUT- to form the differential signal.
5	VOUT-	output	Inverting amplifier output. Rail-to-rail differential output complementary to VOUT+.
6	VS-	power_in	Amplifier negative power-supply input. Tie to ground for single-supply operation or to the negative rail for split-supply. Bypass locally with 0.1 µF.
7	PD	input	Active-low power-down. Logic low puts device into low-power mode (~20 µA typical); logic high or open enables normal operation.
8	VIN+	input	Noninverting amplifier input. Analog signal input to the positive side of the fully differential amplifier.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

THS4521IDGKR
THS4521IDGKT
THS4521IDGKRIDR
THS4521IDGKRPW
THS4521IDGKRDBT

CAD (KiCad official)

Symbol: THS4521IDGKR
Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
3D model: MSOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ths4521idgkr.step`	123 KB	You want the bare part, or you mark your own boards.
`ths4521idgkr-etched.step`	2.2 MB	You want the part with `THS4521IDGKR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 568 faces against 147 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: Texas Instruments datasheet (65 pp, sha256 3feffebe4b1d7fe5, 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