SP809NEK-L-4-6/TR Equivalent & Substitute Parts

Part Overview

The SP809NEK-L-4-6/TR is a single-channel power supply supervisor IC manufactured by MaxLinear, Inc., designed for power-on reset and simple reset applications. This device monitors a 4.6V threshold voltage and provides an active-low reset output via open drain or open collector configuration. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

SP809NEK-L-4-6/TR

MaxLinear, Inc.In Stock: 16075SP809NEK-L-4-6/TR Datasheet

Current PartRFQ

MCP1320T-46LE/OT

Microchip TechnologyIn Stock: 6945MCP1320T-46LE/OT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SP809NEK-L-4-6/TR is determined by the following critical electrical and mechanical parameters:

• Voltage Threshold Matching: 4.6V threshold requirement
• Output Configuration: Open drain or open collector output
• Reset Logic Level: Active low reset signal
• Reset Timeout Duration: 140ms minimum
• Single Channel Monitoring: One voltage input channel
• Package Compatibility: SOT-23 family packages (SOT-23-3 or SOT-23-5)
• Surface Mount Technology: Consistent with original mounting type
• Operating Temperature Range: Minimum coverage of -40°C to 85°C

The MCP1320T-46LE/OT from Microchip Technology meets all substitution criteria while offering extended temperature range capability and active product status.

Parameter Comparison

Engineering Selection Recommendations

The MCP1320T-46LE/OT is the designated substitute for the obsolete SP809NEK-L-4-6/TR. This substitution is supported by:

• Functional Equivalence: Identical voltage threshold (4.6V), output configuration (open drain/open collector), reset logic (active low), and reset timeout (140ms minimum)
• Active Product Status: MCP1320T-46LE/OT maintains active manufacturing status, ensuring long-term availability and supply chain continuity
• Regulatory Compliance: MCP1320T-46LE/OT carries ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements
• Extended Temperature Range: Operating range of -40°C to 125°C exceeds the original -40°C to 85°C specification, providing additional thermal margin
• Package Compatibility: Both devices utilize SOT-23 family packages (SOT-23-3 vs. SOT-23-5), maintaining surface mount compatibility with minor PCB layout adjustments for the additional pin

Frequently Asked Questions (FAQ)

Q: Can the MCP1320T-46LE/OT be used as a direct pin-for-pin replacement?

A: The MCP1320T-46LE/OT uses a SOT-23-5 package compared to the SP809NEK-L-4-6/TR SOT-23-3 package. While both are SOT-23 family devices, the pin count differs (5 pins vs. 3 pins). PCB layout modifications are required to accommodate the additional pins. Electrical functionality remains equivalent for the monitored voltage threshold, reset output, and timing parameters.

Q: What are the key electrical parameters that define substitution compatibility?

A: Substitution compatibility is determined by: voltage threshold (4.6V), output type (open drain/open collector), reset logic level (active low), reset timeout duration (140ms minimum), number of monitored channels (1), and operating temperature range coverage. The MCP1320T-46LE/OT satisfies all these criteria.

Q: Does the extended operating temperature range of the MCP1320T-46LE/OT affect system design?

A: The extended range (-40°C to 125°C vs. -40°C to 85°C) provides additional thermal margin and does not negatively impact system design. Systems designed for the original temperature range will operate within the substitute's specifications.

Q: Are there compliance or regulatory differences between the two parts?

A: The MCP1320T-46LE/OT includes ROHS3 compliance and REACH unaffected status certifications. The original SP809NEK-L-4-6/TR compliance status is not specified in available documentation. For applications requiring regulatory compliance documentation, the MCP1320T-46LE/OT provides verified compliance certifications.

Q: What packaging considerations should be addressed during substitution?

A: The transition from SOT-23-3 to SOT-23-5 requires PCB footprint modification. The SOT-23-5 package includes two additional pins that must be properly routed on the circuit board. Consult the respective datasheets for pin assignments and electrical connections to ensure correct implementation.