DS1231S-50 Equivalent & Substitute Parts

Part Overview

The DS1231S-50 is a supervisor integrated circuit from Analog Devices Inc./Maxim Integrated, classified as a Power Management PMIC. It functions as a simple reset/power-on reset supervisor with open drain or open collector output, monitoring a single voltage channel. The DS1231S-50 is currently listed as obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades where the original part is no longer readily available through standard distribution channels.

Substiute Parts

DS1231S-50

Analog Devices Inc./Maxim IntegratedIn Stock: 2304DS1231S-50 Datasheet

Current PartRFQ

DS1231S-50+

Analog Devices Inc./Maxim IntegratedIn Stock: 1183DS1231S-50+ Datasheet

DirectRFQ

DS1231S-20+

Analog Devices Inc./Maxim IntegratedIn Stock: 1521DS1231S-20+ Datasheet

Parametric EquivalentRFQ

DS1231S-35+

Analog Devices Inc./Maxim IntegratedIn Stock: 1102DS1231S-35+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DS1231S-50 are determined by strict equivalence across the following critical parameters:

• Functional Type: Simple Reset/Power-On Reset supervisor
• Voltage Monitoring Channels: Single channel (1)
• Voltage Threshold Levels: 4.37V and 4.62V
• Output Configuration: Open Drain or Open Collector
• Reset Polarity: Active High/Active Low capability
• Reset Timeout Duration: 150ms Minimum
• Operating Temperature Range: 0°C ~ 70°C
• Package Format: 16-SOIC surface mount
• Electrical and Mechanical Compatibility: Identical pinout and footprint

The substitute parts DS1231S-50+, DS1231S-20+, and DS1231S-35+ share all functional and electrical parameters with the main part number DS1231S-50. These parts are derived from the same base product number (DS1231) and maintain complete parameter equivalence, differing only in product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts (DS1231S-50+, DS1231S-20+, and DS1231S-35+) are functionally and electrically equivalent to the DS1231S-50 and are suitable for direct replacement in applications requiring a single-channel voltage supervisor with the specified parameters.

The primary distinction between the main part and substitutes is product status and regulatory compliance. The DS1231S-50 is obsolete and RoHS non-compliant. All substitute parts carry active product status and ROHS3 compliance certification, making them the preferred selection for new designs and production applications subject to environmental and regulatory requirements.

The DS1231S-50+, DS1231S-20+, and DS1231S-35+ are interchangeable from an electrical and mechanical standpoint. Selection among these three active alternatives should be based on component availability and supply chain considerations rather than technical performance differences.

Frequently Asked Questions (FAQ)

Q: Can DS1231S-50+ be used as a direct replacement for DS1231S-50?

A: Yes. The DS1231S-50+ is electrically and mechanically equivalent to the DS1231S-50. Both parts share identical voltage thresholds (4.37V, 4.62V), output configuration (open drain or open collector), reset characteristics (active high/active low), and 16-SOIC package format. The primary difference is product status (active versus obsolete) and RoHS compliance (ROHS3 compliant versus non-compliant).

Q: Are DS1231S-20+ and DS1231S-35+ compatible with DS1231S-50 applications?

A: Yes. DS1231S-20+ and DS1231S-35+ are parametric equivalents to DS1231S-50. All three parts maintain identical functional specifications, voltage monitoring parameters, output configurations, and package formats. They are suitable for direct substitution in any application designed for the DS1231S-50.

Q: What is the difference between DS1231S-50, DS1231S-50+, DS1231S-20+, and DS1231S-35+?

A: These parts are derived from the same base product number (DS1231) and share all electrical and mechanical parameters. The suffix designations and part number variations do not indicate functional differences. The primary distinctions are product status (obsolete versus active) and compliance certifications (RoHS non-compliant versus ROHS3 compliant).

Q: Is the 16-SOIC package identical across all substitute parts?

A: Yes. All parts use the 16-SOIC package with 0.295" width and 7.50mm dimensions. The package format, pinout, and surface mount footprint are identical across DS1231S-50, DS1231S-50+, DS1231S-20+, and DS1231S-35+.

Q: Are there any temperature or environmental differences between these parts?

A: No. All parts operate within the same temperature range (0°C ~ 70°C) and share identical moisture sensitivity levels (MSL 1 - Unlimited). REACH and ECCN classifications are also identical across all variants.