MT6816CT-ACD-R from Magn Tek, in a SOP-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	CSN	input	SPI chip-select / enable input (active low). Has an internal pull-up (leakage spec references CSN internal pull-up). Digital input logic thresholds referenced to VDD (VIH ≥ 0.7VDD, VIL ≤ 0.3VDD).
2	HVPP	power_in	Dual-function pin. Accepts ~7.0-7.2 V during MTP (NVM) programming, and selects SPI vs. ABZ/UVW output mode during normal operation: tie to VDD for SPI mode, tie to GND for ABZ or UVW mode. Absolute max 8 V.
3	OUT	output	PWM angle-output pin. Push-pull digital output; PWM frequency is programmable, default 971.1 Hz (±8%), 12-bit absolute angle encoded as duty cycle. Max source/sink 20 mA.
4	VDD	power_in	Main supply pin, 3.3-5.0 V typical (3.0-5.5 V operating range, 6.5 V absolute max). Feeds an internal LDO that powers the AMR bridges and digital core. Typical Idd = 10 mA, max 15 mA.
5	A/U/MOSI/SDAT	bidirectional	Muxed I/O. Functions: incremental encoder A output (ABZ mode), commutation U output (UVW mode), SPI MOSI (4-wire SPI), or SDAT bidirectional data (3-wire SPI). Push-pull, ±20 mA max.
6	B/V/MISO	bidirectional	Muxed I/O. Functions: incremental encoder B output (ABZ mode), commutation V output (UVW mode), or SPI MISO (4-wire SPI). Unused in 3-wire SPI. Push-pull, ±20 mA max.
7	Z/W/SCK	bidirectional	Muxed I/O. Functions: incremental encoder Z index output (ABZ mode), commutation W output (UVW mode), or SPI clock input (3-wire or 4-wire SPI). Push-pull, ±20 mA max.
8	GND	power_in	Device ground / substrate return.

Key specifications

Parameter	Value
Manufacturer	Magn Tek
Package	SOP-8
Category	Sensor
Pins	8

Ordering variants

Same part, different packaging or reel option.

MT6816CT-ACD-RCT-STD
MT6816CT-ACD-RCT-STT
MT6816CT-AKD
MT6816CT-AKH
MT6816CT-ACD-R
MT6816CT-ACE
MT6816CT-A9D
MT6816CT-A400
MT6816CT-A200
MT6816CT-A100
MT6816CT-ACD-RCT-U7D
MT6816CT-ACD-RCT-U5D

CAD (KiCad official)

Symbol: MT6816CT-ACD-R
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`mt6816ct-acd-r.step`	122 KB	You want the bare part, or you mark your own boards.
`mt6816ct-acd-r-etched.step`	2.5 MB	You want the part with `MT6816CT-ACD-R` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 608 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: Magn Tek datasheet (30 pp, sha256 74b66b99a0d6b0e4, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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