DS1820 Equivalent & Substitute Parts

Part Overview

The DS1820 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 using 1-Wire® communication protocol. The device operates on 3V to 5.5V supply voltage with 9-bit resolution and ±0.5°C accuracy in the -10°C to 85°C test range.

The DS1820 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or maintenance requirements for systems utilizing this temperature sensor.

Substiute Parts

DS1820

Analog Devices Inc./Maxim IntegratedIn Stock: 11875DS1820 Datasheet

Current PartRFQ

DS18S20+

Analog Devices Inc./Maxim IntegratedIn Stock: 6518DS18S20+ Datasheet

DirectRFQ

DS18S20+T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 4231DS18S20+T&R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DS1820 are qualified based on the following electrical and mechanical parameters:

• Identical sensor type (Digital, Local)
• Matching temperature sensing range (-55°C ~ 125°C)
• Same output protocol (1-Wire®)
• Identical supply voltage range (3V ~ 5.5V)
• Matching resolution (9 bits)
• Equivalent accuracy specifications (±0.5°C / ±2°C)
• Compatible package (TO-92-3)
• Through-hole mounting compatibility

The DS18S20+ and DS18S20+T&R meet all substitution criteria. Both are active products with enhanced feature sets (Standby Mode) and improved compliance status compared to the obsolete DS1820.

Parameter Comparison

Engineering Selection Recommendations

Both DS18S20+ and DS18S20+T&R are direct functional equivalents to the DS1820 with identical electrical specifications and package compatibility. Selection between these substitutes is determined by packaging and procurement requirements:

DS18S20+ is supplied in bulk packaging and is suitable for applications where standard component handling and assembly processes are employed.

DS18S20+T&R is supplied in cut tape (CT) format with formed leads, optimized for automated pick-and-place assembly operations and tape-reel handling systems.

Both substitute parts carry active product status and ROHS3 compliance, providing improved regulatory alignment compared to the obsolete, non-compliant DS1820. The addition of Standby Mode functionality in both substitutes provides enhanced power management capabilities beyond the original DS1820 specification.

Frequently Asked Questions (FAQ)

Q: Are DS18S20+ and DS18S20+T&R electrically interchangeable with DS1820?

A: Yes. Both substitutes maintain identical electrical specifications including temperature range, resolution, accuracy, supply voltage, and 1-Wire® protocol. All three devices are pin-compatible in TO-92-3 packages.

Q: What is the difference between DS18S20+ and DS18S20+T&R?

A: The primary difference is packaging format. DS18S20+ is supplied in bulk, while DS18S20+T&R is supplied in cut tape with formed leads. The formed leads in DS18S20+T&R are designed for automated assembly equipment. Electrical performance is identical.

Q: Why should I transition from DS1820 to a substitute part?

A: The DS1820 is classified as obsolete with non-compliant RoHS status. Both substitute parts are active products with ROHS3 compliance, ensuring long-term availability and regulatory alignment for new designs and ongoing production.

Q: Are there any functional differences between DS1820 and the substitute parts?

A: The substitute parts include Standby Mode functionality not present in the DS1820. This feature provides additional power management options. All other electrical and thermal specifications remain equivalent.

Q: Can I use DS18S20+ or DS18S20+T&R as direct drop-in replacements in existing DS1820 designs?

A: Yes. Both parts are pin-compatible and electrically equivalent. No circuit modifications are required for substitution in existing designs.