ATS643LSHTN-I1-T Equivalent & Substitute Parts

Part Overview

The ATS643LSHTN-I1-T is a digital switch special purpose open collector Hall effect magnetic sensor manufactured by Allegro MicroSystems in a 4-pin module configuration. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part operates across a 4V to 24V supply range with a sensing range of 65% trip and 35% release threshold, designed for through-hole mounting applications requiring magnetic field detection.

Substiute Parts

ATS643LSHTN-I1-T

Allegro MicroSystemsIn Stock: 2955ATS643LSHTN-I1-T Datasheet

Current PartRFQ

ATS685LSHTN-T

Allegro MicroSystemsIn Stock: 3623ATS685LSHTN-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATS643LSHTN-I1-T is determined by strict alignment of the following critical parameters:

• Technology & Function: Hall effect digital switch with special purpose open collector output
• Electrical Specifications: Supply voltage range 4V to 24V, maximum supply current compatibility
• Sensing Characteristics: Trip and release threshold percentages
• Thermal Range: Operating temperature -40°C to 150°C
• Mechanical Compatibility: Through-hole mounting, 4-pin module package (4-SSIP)
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status

The ATS685LSHTN-T qualifies as a direct substitute based on matching these core parameters while offering active product status and enhanced temperature compensation features.

Parameter Comparison

Engineering Selection Recommendations

The ATS685LSHTN-T is the manufacturer-recommended substitute for the obsolete ATS643LSHTN-I1-T. Both components maintain identical supply voltage ranges, thermal operating limits, and package configurations. The substitute part carries active product status, ensuring long-term availability and manufacturing support. Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for new designs and production continuity.

The ATS685LSHTN-T incorporates temperature compensation features and operates with marginally higher maximum supply current (16.8mA versus 16mA). The sensing range thresholds differ slightly (70% trip / 30% release versus 65% trip / 35% release), which may require circuit-level evaluation depending on application-specific magnetic field detection requirements.

Frequently Asked Questions (FAQ)

Q: Can the ATS685LSHTN-T directly replace the ATS643LSHTN-I1-T in existing designs?

A: Yes. Both components share identical supply voltage specifications (4V to 24V), operating temperature range (-40°C to 150°C), output type (open collector), and 4-SSIP module package configuration. Pin-level compatibility is maintained for through-hole mounting applications.

Q: What is the significance of the sensing range difference between these parts?

A: The ATS643LSHTN-I1-T operates at 65% trip and 35% release thresholds, while the ATS685LSHTN-T operates at 70% trip and 30% release thresholds. This represents a shift in magnetic field sensitivity. Applications requiring precise threshold matching should evaluate whether the 5% difference in trip point and 5% difference in release point affects system performance.

Q: Why is the ATS643LSHTN-I1-T listed as obsolete?

A: Obsolete status indicates the part is no longer in active production. The ATS685LSHTN-T, as an active product from the same manufacturer, provides continuity for applications requiring Hall effect magnetic sensor functionality in this package class.

Q: Are there compliance differences between these parts?

A: No. Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying equivalent regulatory requirements for industrial and commercial applications.

Q: What does temperature compensation in the ATS685LSHTN-T provide?

A: Temperature compensation adjusts sensor performance across the -40°C to 150°C operating range to maintain consistent magnetic field detection characteristics. This feature enhances stability in applications subject to wide thermal variations.