DS1816-20 Equivalent & Substitute Parts

Part Overview

The DS1816-20 is a single-channel power supply supervisor IC manufactured by Analog Devices Inc./Maxim Integrated, designed for simple reset and power-on reset applications. This component monitors a single voltage rail and provides an active-low reset output via open drain or open collector configuration. The DS1816-20 is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing system support, design updates, and production continuity.

Substiute Parts

DS1816-20

Analog Devices Inc./Maxim IntegratedIn Stock: 941DS1816-20 Datasheet

Current PartRFQ

MCP130-270DI/TO

Microchip TechnologyIn Stock: 989MCP130-270DI/TO Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DS1816-20 are identified based on the following critical parameters that determine functional equivalence:

• Single-channel voltage monitoring capability – The substitute must monitor exactly one voltage rail
• Voltage threshold range – The substitute threshold must be compatible with the application's supply voltage monitoring requirements (DS1816-20: 2.55V)
• Output type – Open drain or open collector output configuration for active-low reset signaling
• Reset timeout specification – Minimum reset timeout duration (DS1816-20: 100ms minimum)
• Operating temperature range – Must support -40°C to 85°C ambient operation
• Package compatibility – TO-92-3 through-hole package for direct board-level substitution
• Reset logic polarity – Active-low reset output

The MCP130-270DI/TO from Microchip Technology meets these substitution criteria with compatible electrical characteristics and identical package form factor.

Parameter Comparison

Engineering Selection Recommendations

The MCP130-270DI/TO is the primary substitute for the obsolete DS1816-20. Selection of this substitute is justified on the following engineering grounds:

Functional Compatibility – Both devices provide single-channel voltage supervision with active-low reset output in identical TO-92-3 packages, enabling direct board-level replacement without layout modifications.

Electrical Parameter Alignment – The MCP130-270DI/TO maintains compatible voltage threshold (2.625V vs. 2.55V), reset timeout (150ms vs. 100ms minimum), and operating temperature range (-40°C to 85°C). The threshold and timeout variations are within acceptable tolerances for typical power-on reset applications.

Product Status and Compliance – The MCP130-270DI/TO carries active product status from Microchip Technology, ensuring ongoing availability and technical support. The device is ROHS3 compliant, meeting current environmental and regulatory requirements, whereas the DS1816-20 is RoHS non-compliant and obsolete.

Supply Chain Continuity – With 921 pieces in current inventory stock, the MCP130-270DI/TO provides reliable supply availability for new designs and legacy system support.

Frequently Asked Questions (FAQ)

Q: Can the MCP130-270DI/TO directly replace the DS1816-20 without circuit modifications?

A: Yes. Both devices are single-channel supervisors in TO-92-3 packages with open drain/open collector active-low reset outputs. Pin-for-pin compatibility and identical package form factor enable direct substitution. Verify that the application tolerates the 2.625V threshold (vs. 2.55V) and 150ms reset timeout (vs. 100ms minimum) specifications.

Q: What is the significance of the voltage threshold difference (2.55V vs. 2.625V)?

A: The threshold difference of 0.075V represents a 2.9% variation. For applications monitoring supply voltages significantly above or below this range, the difference is negligible. For precision monitoring near the threshold voltage, circuit-level validation is required to confirm acceptable performance margins.

Q: Why is the MCP130-270DI/TO reset timeout longer (150ms vs. 100ms)?

A: The extended reset timeout provides additional margin for power supply stabilization during startup transients. This longer timeout is generally beneficial for system reliability and does not create compatibility issues in standard power-on reset applications. Verify that the application does not require the shorter 100ms timeout for specific timing-critical functions.

Q: Are there package options other than TO-92-3 for the MCP130-270DI/TO?

A: The MCP130-270DI/TO is specified in TO-226-3 and TO-92-3 (TO-226AA) packages. Both are through-hole configurations suitable for board-level assembly. No surface-mount alternatives are provided under this part number.

Q: What compliance certifications apply to the MCP130-270DI/TO?

A: The MCP130-270DI/TO is ROHS3 compliant and REACH unaffected. The DS1816-20 is RoHS non-compliant. For applications subject to environmental or regulatory compliance requirements, the MCP130-270DI/TO is the appropriate selection.

Q: Is the MCP130-270DI/TO available in the same packaging format as the DS1816-20?

A: Yes. Both devices use TO-92-3 through-hole packages with identical pinout and mechanical dimensions, enabling direct board-level substitution without PCB redesign.