DS1620 Equivalent & Substitute Parts

Part Overview

The DS1620 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. The device communicates via a 3-wire interface (CLK, DQ, RST) and operates from a 2.7V to 5.5V supply voltage. Currently classified as obsolete, the DS1620 remains in inventory with 18,900 units available. Due to its discontinued status, identifying compatible substitute components is essential for ongoing system support and new design implementations.

Substiute Parts

DS1620

Analog Devices Inc./Maxim IntegratedIn Stock: 18995DS1620 Datasheet

Current PartRFQ

DS1620+

Analog Devices Inc./Maxim IntegratedIn Stock: 2046DS1620+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DS1620 are identified based on strict electrical and mechanical compatibility criteria. The primary substitution parameter is the DS1620+ variant, which maintains identical functional specifications across all critical dimensions: sensor type, temperature range, resolution, output interface, supply voltage, accuracy specifications, and package form factor. The substitution is valid because both parts share the same base product number (DS1620) and are pin-compatible 8-DIP packages with equivalent electrical characteristics. The key differentiator is product status and compliance certification, not functional capability.

Parameter Comparison

Engineering Selection Recommendations

The DS1620+ serves as the direct substitute for the DS1620 in applications requiring continued component availability. Both parts are electrically and mechanically identical, with pin-for-pin compatibility and equivalent performance across all specified operating parameters. The DS1620+ is the preferred selection for new designs and ongoing production due to its active product status and ROHS3 compliance certification. The DS1620 remains suitable for legacy system maintenance where existing inventory is available, though long-term sourcing is constrained by its obsolete classification. The transition from DS1620 to DS1620+ requires no circuit modifications or firmware changes, as the functional interface and electrical characteristics are identical.

Frequently Asked Questions (FAQ)

Q: Are DS1620 and DS1620+ pin-compatible? A: Yes. Both devices use the 8-DIP package with identical pinout and electrical interface specifications. Direct socket substitution is possible without circuit modification.

Q: What is the primary difference between DS1620 and DS1620+? A: The DS1620+ is the active production variant with ROHS3 compliance certification. The DS1620 is classified as obsolete. Electrical and mechanical specifications are identical.

Q: Can DS1620+ replace DS1620 in existing designs? A: Yes. The DS1620+ maintains full compatibility with all DS1620 applications. No design changes are required for substitution.

Q: What is the temperature measurement accuracy of both parts? A: Both the DS1620 and DS1620+ provide ±0.5°C accuracy across the 0°C to 70°C test condition range, and ±2°C accuracy across the full -55°C to 125°C operating range.

Q: Are there packaging differences between DS1620 and DS1620+? A: The DS1620 is supplied in bulk packaging, while the DS1620+ is supplied in tube packaging. Both use the same 8-DIP physical form factor.

Q: What supply voltage range is supported by both parts? A: Both the DS1620 and DS1620+ operate from 2.7V to 5.5V, providing compatibility with standard logic supply voltages.

Q: Is the 3-wire interface identical between both parts? A: Yes. Both parts use the same 3-wire interface configuration (CLK, DQ, RST) with identical signal timing and protocol specifications.