HX811R from HX hengjiaxing, in a SOT-143. 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	GND	power_in	Ground / negative supply return (电源负极端). 0 V reference for VCC, MR, and RESET.
2	RESET	output	Active-low reset output (复位输出端, RESET with overbar). Drives low when VCC < Vth (2.63 V for HX811R) or when MR is low; returns high after the Trp reset delay (typ. 500 ms). VOL ≤ 0.5 V at ISINK = 3.2 mA; VOH ≥ 0.8·VCC at ISOURCE = 500 µA.
3	MR	input	Active-low manual-reset / enable input (使能控制端, MR with overbar). Pulling MR low forces RESET low. VIH ≥ 0.7·VCC, VIL ≤ 0.2·VCC; minimum pulse width tMR = 10 µs. Enable pull current IMR up to 25 µA at VCC=6V.
4	VCC	power_in	Positive supply input (电源正极端). Operating range 1.0 V to 6.0 V (abs max 6.5 V). Monitored against internal Vth = 2.63 V (HX811R) to generate the reset signal. Quiescent ICCH ≈ 1 µA (typ), max 5 µA.

Key specifications

Parameter	Value
Manufacturer	HX hengjiaxing
Package	SOT-143
Category	PMIC
Pins	4

Ordering variants

Same part, different packaging or reel option.

HX811R

CAD (KiCad official)

Symbol: HX811R
Footprint: Package_TO_SOT_SMD:SOT-143
3D model: SOT-143 (KiCad packages3D, STEP)

Provenance

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

Datasheet: HX hengjiaxing datasheet (3 pp, sha256 4238571228a83ddb, 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