A3282LLHLT Equivalent & Substitute Parts

Part Overview

The A3282LLHLT is a digital switch latch Hall Effect magnetic sensor manufactured by Allegro MicroSystems in SOT-23W surface mount packaging. This component operates as an open drain output device with south pole polarization, designed for magnetic field detection applications across industrial and automotive environments. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production support.

Key Parameters

Parameter	A3282LLHLT
Manufacturer	Allegro MicroSystems
Function	Latch
Technology	Hall Effect
Polarization	South Pole
Sensing Range	15mT Trip, -15mT Release
Voltage Supply	3.6V – 24V
Current Supply (Max)	4.6mA
Current Output (Max)	60mA
Output Type	Open Drain
Operating Temperature	-40°C to 150°C
Mounting Type	Surface Mount
Package	SOT-23W
Product Status	Obsolete
RoHS Status	RoHS Non-Compliant

Substitute Part Grouping Explanation

Substitution of the A3282LLHLT is determined by the following critical parameters:

Core Compatibility Criteria:

Hall Effect technology with open drain output
South pole polarization capability
Operating temperature range of -40°C to 150°C minimum
Surface mount packaging (SOT-23 family)
Supply voltage compatibility within 3.6V to 24V range
Output current capability of at least 60mA

Substitution Logic: The A3282LLHLT is a latch-type sensor. Texas Instruments DRV5023 series devices provide unipolar switch functionality with comparable electrical characteristics and superior product status (active vs. obsolete). The DRV5033 series offers omnipolar switching capability, detecting both north and south pole magnetic fields, providing broader application flexibility while maintaining electrical compatibility.

All substitute parts listed operate on Hall Effect technology with open drain outputs and south pole detection capability. Sensing range variations exist across the substitute family, requiring application-level verification of trip and release thresholds.

Parameter Comparison

Parameter	A3282LLHLT	DRV5023AJEDBZRQ1	DRV5023AJQDBZRQ1	DRV5023BIEDBZRQ1	DRV5033AJEDBZRQ1
Function	Latch	Unipolar Switch	Unipolar Switch	Unipolar Switch	Omnipolar Switch
Technology	Hall Effect	Hall Effect	Hall Effect	Hall Effect	Hall Effect
Polarization	South Pole	South Pole	South Pole	South Pole	North Pole, South Pole
Sensing Range	15mT Trip, -15mT Release	12mT Trip, 1mT Release	12mT Trip, 1mT Release	24mT Trip, 3mT Release	±12mT Trip, ±1mT Release
Voltage Supply	3.6V – 24V	2.7V – 38V	2.7V – 38V	2.7V – 38V	2.7V – 38V
Current Supply (Max)	4.6mA	2.7mA (Typ)	2.7mA (Typ)	2.7mA (Typ)	2.7mA (Typ)
Current Output (Max)	60mA	30mA	30mA	30mA	30mA
Output Type	Open Drain	Open Drain	Open Drain	Open Drain	Open Drain
Operating Temperature	-40°C to 150°C	-40°C to 150°C	-40°C to 150°C	-40°C to 150°C	-40°C to 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package	SOT-23W	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS Non-Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Grade	—	Automotive	Automotive	Automotive	Automotive
Qualification	—	AEC-Q100	AEC-Q100	AEC-Q100	AEC-Q100

Engineering Selection Recommendations

For Active Product Status Requirement: DRV5023AJEDBZRQ1, DRV5023AJQDBZRQ1, DRV5023BIEDBZRQ1, and DRV5033AJEDBZRQ1 are all active products with full manufacturer support and ongoing availability. These are preferred over obsolete variants for new designs.

For RoHS3 Compliance: All Texas Instruments substitute parts are ROHS3 compliant, addressing regulatory requirements that the original A3282LLHLT does not meet.

For Automotive Applications: DRV5023 and DRV5033 series devices carry automotive grade designation with AEC-Q100 qualification, suitable for automotive and industrial environments requiring certified components.

For Sensing Range Matching: DRV5023AJEDBZRQ1 and DRV5023AJQDBZRQ1 provide 12mT trip threshold, closest to the A3282LLHLT's 15mT specification. DRV5023BIEDBZRQ1 and related B-series variants operate at 24mT trip threshold, requiring application verification for higher sensitivity requirements.

For Output Current Capability: The A3282LLHLT supports 60mA maximum output current. All substitute parts are rated at 30mA maximum output. Applications requiring the full 60mA output capability require external driver circuitry or alternative component selection.

For Omnipolar Detection: DRV5033AJEDBZRQ1 detects both north and south pole magnetic fields, providing application flexibility beyond the south-pole-only A3282LLHLT.

Frequently Asked Questions (FAQ)

Q: Can DRV5023 series parts directly replace the A3282LLHLT without circuit modification? A: DRV5023 devices are functionally compatible in open drain output configuration and operating temperature range. However, output current rating is 30mA versus 60mA for the A3282LLHLT. Applications drawing more than 30mA from the output require external driver circuitry.

Q: What is the difference between DRV5023 and DRV5033 series? A: DRV5023 devices detect south pole magnetic fields only (unipolar). DRV5033 devices detect both north and south pole fields (omnipolar). Both share identical electrical characteristics, supply voltage ranges, and operating temperatures. Selection depends on application magnetic field orientation requirements.

Q: Why do sensing range values differ across substitute parts? A: Sensing range (trip and release thresholds) is a design parameter that varies by part number suffix. DRV5023A variants specify 12mT trip, while DRV5023B variants specify 24mT trip. Application-level verification of magnetic field strength is required to select the appropriate threshold.

Q: Are all substitute parts available in the same package? A: The A3282LLHLT uses SOT-23W packaging. Substitute parts use SOT-23-3 (TO-236-3, SC-59) packaging. Both are surface mount three-terminal packages with compatible pinout for Hall Effect sensors. PCB layout compatibility requires verification of specific pin assignments.

Q: Which substitute part has the best product availability? A: DRV5023BIEDBZRQ1 has the highest inventory (18,818 pcs) among active products. DRV5023AJEDBZRQ1 has 16,781 pcs in stock. Both are active products with ongoing manufacturer support and supply chain availability.

Q: Do substitute parts meet automotive qualification requirements? A: Yes. All DRV5023 and DRV5033 series devices carry automotive grade designation and AEC-Q100 qualification, suitable for automotive and industrial applications requiring certified components.

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