DS18S20Z Temperature Sensor - Equivalent & Substitute Parts

Part Overview

The DS18S20Z is a digital temperature sensor manufactured by Analog Devices Inc./Maxim Integrated, designed for local temperature measurement across a -55°C to 125°C range with 9-bit resolution and 1-Wire® interface output. The device operates on a 3V to 5.5V supply and features programmable limit outputs and standby mode functionality in an 8-SOIC surface mount package.

The DS18S20Z is classified as obsolete. Identifying suitable substitute components ensures design continuity and maintains supply chain reliability for applications requiring equivalent thermal sensing capabilities.

Substiute Parts

DS18S20Z

Analog Devices Inc./Maxim IntegratedIn Stock: 1948DS18S20Z Datasheet

Current PartRFQ

DS18S20Z+

Analog Devices Inc./Maxim IntegratedIn Stock: 3031DS18S20Z+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DS18S20Z is determined by strict equivalence across the following critical parameters:

• Sensor type classification (Digital, Local)
• Temperature measurement range (-55°C ~ 125°C)
• 1-Wire® interface protocol
• Supply voltage range (3V ~ 5.5V)
• 9-bit resolution output
• Integrated features (Output Switch, Programmable Limit, Standby Mode)
• Physical package specification (8-SOIC)
• Surface mount mounting type

Parts meeting all these criteria are classified as direct substitutes. Deviations in any parameter disqualify a component from substitution consideration.

Parameter Comparison

Engineering Selection Recommendations

The DS18S20Z+ serves as the direct substitute for the obsolete DS18S20Z. Both components are manufactured by Analog Devices Inc./Maxim Integrated and maintain identical electrical and mechanical specifications across all critical parameters.

The DS18S20Z+ is classified as active product status, ensuring ongoing availability and supply chain support. The DS18S20Z+ achieves ROHS3 compliance, whereas the original DS18S20Z is RoHS non-compliant. This compliance improvement aligns with current regulatory requirements for electronic component procurement.

Both components share identical 1-Wire® interface protocol implementation, 9-bit resolution output, and operational temperature range, ensuring functional compatibility in existing circuit designs without modification to firmware or hardware interfaces.

Frequently Asked Questions (FAQ)

Q: Can the DS18S20Z+ be used as a direct replacement for the DS18S20Z in existing designs?

A: Yes. The DS18S20Z+ maintains identical electrical specifications, output protocol, resolution, accuracy, and package configuration. No circuit modifications are required for substitution.

Q: What is the significance of the product status difference between the two parts?

A: The DS18S20Z is classified as obsolete, indicating discontinued manufacturing and limited availability. The DS18S20Z+ is active product status, ensuring reliable long-term supply and continued manufacturer support.

Q: Does the RoHS compliance difference affect functional compatibility?

A: No. RoHS compliance status reflects manufacturing process and material composition standards but does not alter electrical performance or interface behavior. Both components operate identically within specified parameters.

Q: Are there packaging differences between the DS18S20Z and DS18S20Z+?

A: The DS18S20Z+ is supplied in tube packaging, whereas the DS18S20Z packaging format is unspecified. Both components use identical 8-SOIC physical packages suitable for surface mount assembly.

Q: What parameters must remain identical for substitution to be valid?

A: Sensor type, temperature range, 1-Wire® interface, supply voltage, 9-bit resolution, integrated features, and 8-SOIC package specification must all match exactly. The DS18S20Z+ meets all these requirements.