DS1629S/T&R Equivalent & Substitute Parts

Part Overview

The DS1629S/T&R is a thermometer and thermostat integrated circuit manufactured by Analog Devices Inc./Maxim Integrated, designed for temperature monitoring and alarm applications. This device combines an internal temperature sensor with real-time clock and calendar functionality, communicating via I2C/SMBus protocol. The main part number DS1629S/T&R is classified as obsolete, making identification of active equivalent parts essential for new designs and ongoing production requirements.

Substiute Parts

DS1629S/T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 3971DS1629S/T&R Datasheet

Current PartRFQ

DS1629S+T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 3466DS1629S+T&R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DS1629S/T&R is determined by strict equivalence across the following critical parameters:

• Identical functional capability (Thermometer, Thermostat with internal sensor)
• Matching temperature sensing range (-55°C ~ 125°C)
• Equivalent temperature accuracy (±2°C Max)
• Same communication protocol (I2C/SMBus)
• Identical alarm output functionality
• Matching supply voltage range (2.7V ~ 5.5V)
• Same package type and pinout (8-SOIC)
• Equivalent internal topology (ADC, Comparator, Oscillator, Register Bank)

The substitute part DS1629S+T&R meets all these criteria and represents the active production equivalent with improved compliance status.

Parameter Comparison

Engineering Selection Recommendations

The DS1629S+T&R is the direct active equivalent for the obsolete DS1629S/T&R. Both parts are functionally identical across all electrical and mechanical parameters. The primary distinction is product status and regulatory compliance: DS1629S+T&R is actively manufactured and ROHS3 compliant, whereas DS1629S/T&R is obsolete and RoHS non-compliant.

For new designs and production requiring thermometer/thermostat functionality with I2C/SMBus interface in 8-SOIC packaging, DS1629S+T&R is the appropriate selection. For legacy system maintenance where DS1629S/T&R inventory is depleted, DS1629S+T&R provides direct functional replacement without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Are DS1629S/T&R and DS1629S+T&R pin-compatible? A: Yes. Both devices use identical 8-SOIC packaging with matching pinout and electrical characteristics. No PCB modifications are required for substitution.

Q: What is the difference between DS1629S/T&R and DS1629S+T&R? A: The primary differences are product status and compliance. DS1629S/T&R is obsolete and RoHS non-compliant. DS1629S+T&R is actively produced and ROHS3 compliant. Electrical and functional specifications are identical.

Q: Can DS1629S+T&R replace DS1629S/T&R in existing applications? A: Yes. DS1629S+T&R is a direct functional equivalent with identical temperature sensing range, accuracy, communication protocol, and package specifications. No firmware or software modifications are necessary.

Q: What does the "+T&R" designation indicate? A: The "+T&R" suffix indicates Tape & Reel packaging format, which is the standard production packaging for surface-mount components in high-volume applications.

Q: Are there any compliance advantages to using DS1629S+T&R? A: Yes. DS1629S+T&R is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. DS1629S/T&R does not meet these standards.

Q: What is the temperature measurement accuracy of these devices? A: Both DS1629S/T&R and DS1629S+T&R provide ±2°C maximum accuracy across the -55°C to 125°C operating range.

Q: Can these devices operate at 3.3V supply voltage? A: Yes. Both devices support supply voltage from 2.7V to 5.5V, making them compatible with 3.3V and 5V logic systems.