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 device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The EconoReset series supervisor offers cost-effective voltage monitoring with minimal external component requirements.

Substiute Parts

DS1816-20+

Analog Devices Inc./Maxim IntegratedIn Stock: 1046DS1816-20+ Datasheet

Current PartRFQ

MCP130-270DI/TO

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DS1816-20+ is determined by the following critical parameters:

• Single-channel voltage monitoring capability with active-low reset output
• Open drain or open collector output configuration for direct microcontroller integration
• Voltage threshold specification (2.55V nominal)
• Reset timeout duration (100ms minimum)
• Through-hole mounting in TO-92-3 package
• Operating temperature range of -40°C to 85°C
• Regulatory compliance (ROHS3, REACH Unaffected)

The MCP130-270DI/TO from Microchip Technology meets these core functional requirements while maintaining package compatibility and environmental compliance. Substitution is valid when the alternative part preserves the single-channel monitoring architecture, active-low reset logic, and through-hole TO-92-3 package form factor.

Parameter Comparison

Engineering Selection Recommendations

The MCP130-270DI/TO is a direct functional equivalent for the obsolete DS1816-20+ supervisor IC. Both devices share identical package geometry (TO-92-3), operating temperature range (-40°C to 85°C), and regulatory compliance status (ROHS3 Compliant, REACH Unaffected). The MCP130-270DI/TO maintains active product status with Microchip Technology, ensuring long-term availability and technical support.

The primary parameter variance is the voltage threshold specification: the MCP130-270DI/TO operates at 2.625V compared to the DS1816-20+ at 2.55V, representing a 2.7% difference. The reset timeout specification also differs, with the MCP130-270DI/TO providing 150ms minimum versus 100ms minimum for the original part. These differences must be evaluated against specific circuit requirements and system tolerance specifications.

Selection of the MCP130-270DI/TO is appropriate for applications where the voltage threshold and reset timeout variations are compatible with system design parameters. The active product status and established supply chain availability of the Microchip part provide superior long-term reliability compared to sourcing obsolete inventory of the original DS1816-20+ component.

Frequently Asked Questions (FAQ)

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

A: Both devices feature identical TO-92-3 package pinouts, open drain output configuration, and active-low reset logic. Direct pin-for-pin substitution is mechanically and electrically feasible. However, the voltage threshold difference (2.625V vs. 2.55V) and reset timeout variation (150ms vs. 100ms) must be evaluated against your specific circuit design requirements to confirm functional compatibility.

Q: What is the significance of the voltage threshold difference between these parts?

A: The voltage threshold determines the supply voltage level at which the supervisor IC triggers a reset condition. The DS1816-20+ monitors at 2.55V while the MCP130-270DI/TO monitors at 2.625V. This 70mV difference may be significant in applications with tight supply voltage tolerances or marginal operating conditions. Circuit analysis is required to confirm acceptability in your specific application.

Q: Are there any package or mounting considerations for substitution?

A: Both parts use identical TO-92-3 through-hole packaging. No PCB layout modifications or mounting changes are required. Both devices maintain the same moisture sensitivity level (MSL 1, Unlimited) and environmental compliance certifications.

Q: Why is the DS1816-20+ listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production and support. The MCP130-270DI/TO from Microchip Technology is an active product with ongoing manufacturing and technical support, making it the preferred choice for new designs and system maintenance.

Q: What is the reset timeout specification and why does it differ?

A: Reset timeout specifies the minimum duration the reset output remains asserted after a voltage threshold violation is detected. The DS1816-20+ provides 100ms minimum while the MCP130-270DI/TO provides 150ms minimum. The longer timeout in the substitute part may affect system startup timing and must be verified against microcontroller reset requirements.