DS1629S Equivalent & Substitute Parts

Part Overview

The DS1629S is a thermometer, thermostat, and real-time clock (RTC) calendar integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It features an internal temperature sensor with I2C/SMBus output, designed for thermal monitoring and alarm applications across a -55°C to 125°C operating range. The DS1629S is currently classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

DS1629S

Analog Devices Inc./Maxim IntegratedIn Stock: 3306DS1629S Datasheet

Current PartRFQ

DS1629S+

Analog Devices Inc./Maxim IntegratedIn Stock: 2667DS1629S+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DS1629S is determined by strict alignment across the following critical parameters:

• Functional equivalence: Thermometer and thermostat capability with RTC/calendar functionality
• Sensor configuration: Internal temperature sensor
• Temperature range: -55°C to 125°C operating and sensing range
• Temperature accuracy: ±2°C maximum
• Communication protocol: I2C/SMBus interface
• Alarm output: Presence of alarm functionality
• Package and pinout: 8-SOIC surface mount package with identical mechanical dimensions
• Supply voltage: 2.7V to 5.5V compatibility

The DS1629S+ meets all substitution criteria as a direct equivalent from the same manufacturer, sharing identical electrical specifications and package configuration while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The DS1629S+ is the direct substitute for the DS1629S. Both components share identical electrical specifications, functional capabilities, and mechanical packaging. The primary distinction is product lifecycle status: the DS1629S is obsolete while the DS1629S+ maintains active production status.

For new designs and ongoing system support, the DS1629S+ is the appropriate selection. It provides equivalent performance with the additional benefit of ROHS3 compliance, whereas the original DS1629S is RoHS non-compliant. Both components maintain identical moisture sensitivity levels and REACH compliance status.

Pinout compatibility and I2C/SMBus protocol implementation are identical between the two parts, enabling direct substitution without circuit modification or firmware changes.

Frequently Asked Questions (FAQ)

Q: Can the DS1629S+ be used as a direct replacement for the DS1629S?

A: Yes. The DS1629S+ is a direct substitute with identical electrical specifications, functional capabilities, package configuration, and pinout. No circuit modifications are required.

Q: What is the primary reason to substitute the DS1629S?

A: The DS1629S is classified as obsolete. The DS1629S+ provides equivalent functionality with active production status and improved regulatory compliance (ROHS3).

Q: Are there any differences in temperature measurement accuracy between the two parts?

A: No. Both the DS1629S and DS1629S+ maintain ±2°C maximum accuracy across the -55°C to 125°C sensing range.

Q: Is the 8-SOIC package identical for both parts?

A: Yes. Both components use the same 8-SOIC surface mount package with 0.154" width (3.90mm). Mechanical dimensions and pinout are identical.

Q: What is the difference in RoHS compliance between these parts?

A: The DS1629S is RoHS non-compliant, while the DS1629S+ is ROHS3 compliant. For applications requiring RoHS compliance, the DS1629S+ is the required selection.

Q: Do both parts support the same I2C/SMBus communication protocol?

A: Yes. Both the DS1629S and DS1629S+ implement identical I2C/SMBus interface specifications with no protocol differences.

Q: What is the supply voltage requirement for both parts?

A: Both components operate across 2.7V to 5.5V supply voltage range with no variation between the two parts.