HAL579SF-K Equivalent & Substitute Parts

Part Overview

The HAL579SF-K is a digital switch latch Hall effect magnetic sensor manufactured by TDK-Micronas GmbH, designed for magnetic field detection applications requiring current source output. The device operates as a latch function sensor with south pole polarization and temperature compensation. This part is classified as obsolete, making equivalent substitute components necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility while meeting current availability and product status requirements.

Substiute Parts

HAL579SF-K

TDK-Micronas GmbHIn Stock: 929HAL579SF-K Datasheet

Current PartRFQ

HAL1562 SU-A

TDK-Micronas GmbHIn Stock: 21014HAL1562 SU-A Datasheet

MFR RecommendedRFQ

SS566AT

Honeywell Sensing and Productivity SolutionsIn Stock: 5296SS566AT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the HAL579SF-K is based on the following critical parameters:

Primary Compatibility Criteria:

• Function: Latch operation required
• Technology: Hall Effect magnetic sensing
• Mounting Type: Surface Mount
• Package Category: SOT form factor compatibility
• Polarization: South Pole operation capability
• Sensing Range: Threshold values within acceptable tolerance (±1mT variation acceptable for latch function)
• Supply Voltage: Overlap with 3.75V ~ 24V range
• Temperature Compensation: Feature presence for thermal stability
• Product Status: Active status preferred for long-term availability

Identified Substitutes:

1. HAL1562 SU-A (TDK-Micronas GmbH): Maintains Hall effect latch function with dual polarization capability (North/South Pole), active product status, and RoHS3 compliance. Package transition from SOT-89B-1 to SOT-23-3 requires PCB layout modification. Output type differs (Open Drain vs. Current Source).

2. SS566AT (Honeywell Sensing and Productivity Solutions): Maintains Hall effect latch function with south pole polarization, active product status, and comparable sensing range (18mT vs. 18.5mT). Package remains SOT-89B form factor. Output type differs (Open Collector vs. Current Source). Extended operating temperature range (-40°C ~ 150°C) provides additional thermal margin.

Parameter Comparison

Engineering Selection Recommendations

For HAL1562 SU-A Selection:

• Suitable when PCB redesign is feasible to accommodate SOT-23-3 package transition
• Dual polarization capability (North/South Pole) provides design flexibility
• ROHS3 compliance meets current regulatory requirements
• Lower sensing threshold (12mT) requires application verification for magnetic field strength compatibility
• Open Drain output requires interface circuit redesign from current source configuration
• Active product status ensures long-term supply availability

For SS566AT Selection:

• Recommended for direct package compatibility (SOT-89B form factor matches original)
• South pole polarization maintains original magnetic field orientation
• Sensing range (18mT) closely matches original specification (18.5mT)
• Extended operating temperature range (-40°C ~ 150°C) provides thermal margin beyond original specification
• Open Collector output requires interface circuit redesign from current source configuration
• Active product status ensures long-term supply availability
• Temperature compensation feature maintained

General Considerations: Both substitutes are active products with current manufacturing status, ensuring supply chain continuity. Output type differences (Current Source to Open Drain/Open Collector) necessitate circuit interface modifications. Selection between substitutes depends on PCB layout constraints and application-specific magnetic field requirements.

Frequently Asked Questions (FAQ)

Q: Can HAL579SF-K be directly replaced without circuit modifications? A: No. Both substitute parts feature different output types (Open Drain or Open Collector vs. Current Source), requiring interface circuit redesign. HAL1562 SU-A also requires PCB layout changes due to package transition from SOT-89B-1 to SOT-23-3.

Q: What is the primary difference between HAL1562 SU-A and SS566AT? A: HAL1562 SU-A uses SOT-23-3 package with dual polarization capability and lower sensing threshold (12mT). SS566AT maintains SOT-89B package with south pole polarization and sensing threshold of 18mT, closer to the original specification.

Q: Is the sensing range difference between HAL579SF-K (18.5mT) and SS566AT (18mT) significant? A: The 0.5mT difference falls within typical application tolerances for latch function sensors. Application verification is necessary to confirm compatibility with specific magnetic field strength requirements.

Q: Does HAL1562 SU-A support south pole polarization only? A: No. HAL1562 SU-A supports both North Pole and South Pole polarization, providing flexibility for applications requiring either orientation.

Q: What are the temperature operating range differences? A: HAL579SF-K operates -40°C ~ 85°C. HAL1562 SU-A operates -40°C ~ 70°C (lower maximum). SS566AT operates -40°C ~ 150°C (higher maximum). Application temperature requirements determine suitability.

Q: Are both substitutes RoHS compliant? A: Yes. HAL579SF-K is RoHS Compliant. HAL1562 SU-A is ROHS3 Compliant (current standard). SS566AT is RoHS Compliant. All meet regulatory requirements.

Q: Which substitute provides the closest electrical match? A: SS566AT provides the closest match in sensing range (18mT vs. 18.5mT), polarization (South Pole), package form factor (SOT-89B), and temperature compensation feature. Output type remains the primary difference requiring circuit modification.