DS1231-50 Equivalent & Substitute Parts

Part Overview

The DS1231-50 is a supervisor integrated circuit from Analog Devices Inc./Maxim Integrated designed for power management applications. This device functions as a simple reset/power-on reset controller with open drain or open collector output, monitoring a single voltage channel. The DS1231-50 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Active alternatives within the same product family maintain identical electrical and mechanical specifications while offering current product status and improved availability.

Substiute Parts

DS1231-50

Analog Devices Inc./Maxim IntegratedIn Stock: 1625DS1231-50 Datasheet

Current PartRFQ

DS1231-50+

Analog Devices Inc./Maxim IntegratedIn Stock: 1197DS1231-50+ Datasheet

DirectRFQ

DS1231-20+

Analog Devices Inc./Maxim IntegratedIn Stock: 1699DS1231-20+ Datasheet

Parametric EquivalentRFQ

DS1231-35+

Analog Devices Inc./Maxim IntegratedIn Stock: 1545DS1231-35+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DS1231-50 are qualified based on strict electrical and mechanical parameter matching within the DS1231 product family. All substitute candidates maintain identical specifications across the following critical parameters:

• Single voltage channel monitoring capability
• Voltage threshold levels: 4.37V and 4.62V
• Open drain or open collector output configuration
• Active high/active low reset logic
• 150ms minimum reset timeout
• Operating temperature range: 0°C ~ 70°C
• Through-hole mounting in 8-DIP package (0.300", 7.62mm)
• 8-PDIP supplier device package
• ROHS3 compliance and REACH unaffected status

The primary distinction among substitute parts is product status and packaging format. DS1231-50+ and DS1231-35+ are active products supplied in tube packaging, while DS1231-20+ is also active with tube packaging. The DS1231-50 (original part) is obsolete, necessitating transition to active alternatives.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts (DS1231-50+, DS1231-20+, and DS1231-35+) are direct functional equivalents to the DS1231-50. Selection among these active alternatives should be based on the following factors:

Product Status: DS1231-50+ and DS1231-35+ are active products with confirmed current availability. DS1231-20+ is also active. The obsolete DS1231-50 should not be selected for new designs.

Compliance and Certifications: All substitute parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the original part.

Packaging and Inventory: All substitutes are supplied in tube packaging. Current inventory levels are: DS1231-50+ (1096 pcs), DS1231-20+ (1653 pcs), and DS1231-35+ (1493 pcs). Selection may be influenced by procurement lead times and supply chain requirements.

Electrical and Mechanical Compatibility: All substitute parts are pin-for-pin and functionally equivalent, requiring no circuit modifications or PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can DS1231-50+ be used as a direct replacement for DS1231-50?

A: Yes. DS1231-50+ is a direct substitute with identical electrical specifications, voltage thresholds, output configuration, reset timing, and package dimensions. The primary difference is product status (active vs. obsolete) and packaging format (tube).

Q: What is the difference between DS1231-50+, DS1231-20+, and DS1231-35+?

A: All three parts share identical electrical and mechanical specifications. The numeric designations (50, 20, 35) represent different product variants within the DS1231 family, but they maintain the same voltage thresholds (4.37V, 4.62V), reset timeout (150ms minimum), and package configuration (8-DIP). All are supplied in tube packaging and are active products.

Q: Are these parts pin-compatible?

A: Yes. All substitute parts use the 8-DIP (0.300", 7.62mm) package with 8-PDIP supplier device package configuration, ensuring direct pin compatibility with existing PCB designs.

Q: Do the substitute parts meet the same compliance standards?

A: Yes. All substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory compliance of the original DS1231-50.

Q: What is the operating temperature range for these supervisor ICs?

A: The operating temperature range is 0°C to 70°C (TA) for all parts in this substitution group.

Q: Can I mix different DS1231 variants in the same production batch?

A: Yes. Since DS1231-50+, DS1231-20+, and DS1231-35+ are functionally equivalent with identical electrical and mechanical parameters, they can be used interchangeably in the same circuit design without modification.