LIS331DLHTR from STMicroelectronics, in a LGA-16(3x3). 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	Vdd_IO	power_in	Power supply for I/O pins. Typical 1.71 V to Vdd+0.1 V; sets logic thresholds (VIH = 0.8Vdd_IO, VOH = 0.9Vdd_IO).
2	NC	unconnected	Not connected. Leave floating.
3	NC	unconnected	Not connected. Leave floating.
4	SCL/SPC	input	Serial clock. Acts as I2C serial clock (SCL) in I2C mode or SPI serial port clock (SPC) in SPI mode.
5	GND	power_in	0 V supply (ground reference).
6	SDA/SDI/SDO	bidirectional	Serial data. Functions as I2C serial data (SDA) in I2C mode, SPI serial data input (SDI) in 4-wire SPI mode, or 3-wire SPI serial data output (SDO) in 3-wire SPI mode.
7	SDO/SA0	bidirectional	In SPI mode: serial data output (SDO). In I2C mode: LSb (bit 0) of the device I2C slave address (SA0) - selects one of two possible 7-bit slave addresses.
8	CS	input	SPI enable / I2C-SPI mode selection input. CS = 1: I2C mode enabled; CS = 0: SPI mode enabled (chip select active low during SPI transactions).
9	INT2	output	Inertial interrupt 2 output. Programmable interrupt for free-fall / motion / 6D orientation events; polarity and latching configurable via CTRL_REG3 / INT2_CFG.
10	Reserved	passive	Reserved. Must be connected to GND for correct operation.
11	INT1	output	Inertial interrupt 1 output. Programmable interrupt (free-fall / motion / data-ready) with configurable polarity and latching through CTRL_REG3 / INT1_CFG.
12	GND	power_in	0 V supply (ground reference).
13	GND	power_in	0 V supply (ground reference).
14	Vdd	power_in	Main analog power supply. Operational range 2.16 V to 3.6 V (2.5 V typical). Factory calibrated at 2.5 V.
15	Reserved	passive	Reserved. Must be connected to Vdd for correct operation.
16	GND	power_in	0 V supply (ground reference).

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	LGA-16(3x3)
Category	Sensors
Pins	16

Ordering variants

Same part, different packaging or reel option.

LIS331DLHTR

CAD (KiCad official)

Symbol: LIS331DLHTR
Footprint: Package_LGA:LGA-16_3x3mm_P0.5mm
3D model: LGA-16(3x3) (KiCad packages3D, STEP)

Provenance

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

Datasheet: STMicroelectronics datasheet (38 pp, sha256 ed8b228d0b34329e, 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