DS1817-20+ Equivalent & Substitute Parts

Part Overview

The DS1817-20+ is a single-channel power management supervisor IC manufactured by Analog Devices Inc./Maxim Integrated, designed for reset and power-on reset applications. This device operates as a push-pull, totem pole output supervisor with active high reset functionality and a 100ms minimum reset timeout. The DS1817-20+ is classified as obsolete, making identification of functionally equivalent substitute components necessary for ongoing design support and production continuity.

Substiute Parts

DS1817-20+

Analog Devices Inc./Maxim IntegratedIn Stock: 773DS1817-20+ Datasheet

Current PartRFQ

MCP101-270DI/TO

Microchip TechnologyIn Stock: 2581MCP101-270DI/TO Datasheet

MFR RecommendedRFQ

DS1817-20+

Analog Devices Inc./Maxim IntegratedIn Stock: 773DS1817-20+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DS1817-20+ is determined by strict alignment of the following critical parameters:

• Single-channel voltage monitoring capability
• Push-pull, totem pole output configuration
• Active high reset logic
• Through-hole mounting in TO-92-3 package
• Operating temperature range of -40°C to 85°C
• RoHS3 compliance and MSL 1 rating

The MCP101-270DI/TO from Microchip Technology meets these core functional and mechanical requirements. While the voltage threshold (2.625V vs. 2.55V) and reset timeout (150ms vs. 100ms) differ, these variations remain within acceptable substitution parameters for single-channel supervisor applications with identical output topology and package specifications.

Parameter Comparison

Engineering Selection Recommendations

The MCP101-270DI/TO is the primary substitute for the obsolete DS1817-20+. Both devices maintain identical package specifications (TO-92-3), output topology (push-pull, totem pole), reset logic (active high), and operating temperature range (-40°C to 85°C). Both components are RoHS3 compliant with MSL 1 rating, ensuring regulatory and environmental compatibility.

The MCP101-270DI/TO carries active product status from Microchip Technology, providing ongoing availability and supply chain stability compared to the obsolete DS1817-20+. The voltage threshold differential (2.625V vs. 2.55V) and reset timeout extension (150ms vs. 100ms) represent minor parametric variations that do not compromise functional equivalence in single-channel supervisor applications.

Frequently Asked Questions (FAQ)

Q: Can the MCP101-270DI/TO directly replace the DS1817-20+ without circuit modification?

A: Yes. Both devices share identical package geometry (TO-92-3), output configuration (push-pull, totem pole), reset logic (active high), and operating temperature specifications. Pin-to-pin compatibility is maintained.

Q: How do the voltage threshold differences affect substitution?

A: The DS1817-20+ monitors at 2.55V while the MCP101-270DI/TO monitors at 2.625V. This 70mV difference represents a 2.7% variance and remains within acceptable tolerance for single-channel supervisor applications. Circuit design must account for this threshold offset during implementation.

Q: What is the significance of the reset timeout difference?

A: The DS1817-20+ provides a 100ms minimum reset timeout, while the MCP101-270DI/TO extends this to 150ms. The longer timeout in the substitute part does not compromise functionality and may provide additional system stabilization margin in power-up sequences.

Q: Are there compliance or regulatory concerns with substitution?

A: No. Both the DS1817-20+ and MCP101-270DI/TO are RoHS3 compliant with MSL 1 rating. Substitution maintains full regulatory and environmental compliance.

Q: Why is the DS1817-20+ classified as obsolete?

A: The DS1817-20+ has reached end-of-life status from Analog Devices Inc./Maxim Integrated. The MCP101-270DI/TO from Microchip Technology is actively manufactured and represents the recommended path for design continuity and production support.