A1302 from Allegro MicroSystems, in a SOT-23W. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	VCC	power_in	Supply input that connects power to the chip; the datasheet specifies operation from 4.5 to 6 V while running with TJ below 165 °C.
2	VOUT	output	Ratiometric analog output that is about 50% of VCC at quiescent; the datasheet gives VOUT(High) of at least 4.65 V at −1 mA source, VOUT(Low) of at most 0.25 V at 1 mA sink, and an absolute maximum output sink current of 10 mA.
3	GND	power_in	Ground connection for the device; the datasheet gives no separate electrical limit for this pin.

Key specifications

Parameter	Value
Manufacturer	Allegro MicroSystems
Package	SOT-23W
Category	Sensor
Pins	3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Supply Voltage	VCC	4.5		6	V	Running, TJ < 165°C	4
Supply Current	ICC			11	mA	Output open	4
Output Voltage High	VOUT(High)	4.65	4.7		V	ISOURCE = -1 mA, Sens = nominal	4
Output Voltage Low	VOUT(Low)		0.2	0.25	V	ISINK = 1 mA, Sens = nominal	4
Power-On Time	tPO		3	5	µs	VCC(min) to 0.95 VOUT; B = ±1400 G; Slew rate = 4.5 V/µs to 4.5 V/100 ns	4
Output Resistance	ROUT		2	5	Ω	ISINK ≤ 1 mA, ISOURCE ≥ -1 mA	4
Quiescent Output Voltage Error vs. VCC	ΔVOUTQ(V)	-3		3	%	TA = 25°C	4
Magnetic Sensitivity Error vs. VCC	ΔSens(V)	-3		3	%	TA = 25°C	4
Linearity	Lin	-2.5		2.5	%	TA = 25°C	4
Symmetry	Sym	-3		3	%	TA = 25°C	4
Quiescent Output Voltage	VOUTQ	2.4	2.5	2.6	V	B = 0 G; TA = 25°C	4
Quiescent Output Voltage over Operating Temperature Range	VOUTQ(ΔTA)	2.2		2.8	V	B = 0 G	4
Magnetic Sensitivity	Sens	1	1.3	1.6	mV/G	A1302; TA = 25°C	4
Magnetic Sensitivity over Operating Temperature Range	Sens(ΔTA)	0.85		1.75	mV/G	A1302	4
Operating Ambient Temperature Range E	TA	-40		85	ºC	Range E	3
Operating Ambient Temperature Range K	TA	-40		125	ºC	Range K	3
Supply Voltage	VCC			8	V		3
Output Voltage	VOUT			8	V		3
Reverse Supply Voltage	VRCC	-0.1			V		3
Reverse Output Voltage	VROUT	-0.1			V		3
Output Sink Current	IOUT			10	mA		3
Maximum Junction Temperature	TJ(max)			165	ºC		3
Storage Temperature	Tstg	-65		170	ºC		3

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part	Material	Colour / plating	Datasheet says	Page
contacts		tin	through-hole mount. They are lead (Pb) free (suffix, -T) with 100% matte tin plated leadframes.	2

CAD (KiCad official)

Symbol: A1302
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23W (KiCad packages3D, STEP)
3D model files: a1302-etched.step / a1302-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); a1302.step / a1302.glb are the bare package body.

Provenance

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

Datasheet: Allegro MicroSystems datasheet (10 pp, sha256 65c35521e270ff28, retrieved 2026-11-12, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

A1302

Verified A1302

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README