DS1620S/T&R Equivalent & Substitute Parts

Part Overview

The DS1620S/T&R is a digital temperature sensor manufactured by Analog Devices Inc./Maxim Integrated, designed for local temperature measurement across the -55°C to 125°C range. This component operates with a 3-Wire interface (CLK, DQ, RST) and provides 9-bit resolution output. The part is currently classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

DS1620S/T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 3133DS1620S/T&R Datasheet

Current PartRFQ

DS1620S+T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 8421DS1620S+T&R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DS1620S/T&R is determined by the following critical parameters:

• Sensor Type & Interface: Must be Digital, Local sensor with 3-Wire (CLK, DQ, RST) output configuration
• Temperature Range: Must support -55°C to 125°C local sensing capability
• Supply Voltage: Must operate within 2.7V to 5.5V range
• Package & Mounting: Must use 8-SOIC surface mount package with identical physical dimensions (0.209", 5.30mm Width)
• Base Product Family: Must share the DS1620 base product number lineage

The DS1620S+T&R qualifies as a direct substitute based on these parameters. While resolution differs (11-bit versus 9-bit), all electrical and mechanical compatibility criteria are met, and the substitute maintains the same interface protocol and operating specifications.

Parameter Comparison

Engineering Selection Recommendations

The DS1620S+T&R is the appropriate substitute for the obsolete DS1620S/T&R based on the following engineering criteria:

Electrical Compatibility: Both parts share identical sensor type, temperature range, output interface, supply voltage, and accuracy specifications. The 11-bit resolution of the substitute provides enhanced measurement precision compared to the 9-bit original, representing a functional improvement without introducing incompatibility.

Mechanical Compatibility: Package type, physical dimensions, and surface mount configuration are identical, ensuring direct PCB layout compatibility without redesign requirements.

Compliance Status: The substitute is ROHS3 compliant and carries Active product status, whereas the original is obsolete and RoHS non-compliant. For new designs or production continuity, the substitute aligns with current regulatory requirements and supply chain availability.

Availability: The substitute maintains significantly higher inventory levels (8338 Pcs versus 3100 Pcs), supporting procurement reliability for ongoing production.

Frequently Asked Questions (FAQ)

Q: Can DS1620S+T&R be used as a direct replacement for DS1620S/T&R in existing designs?

A: Yes. Both parts are pin-compatible, share identical electrical specifications for temperature sensing range, output interface, supply voltage, and accuracy. The substitute's 11-bit resolution is a functional enhancement that does not create incompatibility with existing firmware or hardware interfaces designed for the original 9-bit sensor.

Q: What is the difference in resolution between these parts?

A: The original DS1620S/T&R provides 9-bit resolution, while the substitute DS1620S+T&R provides 11-bit resolution. This means the substitute offers finer temperature measurement granularity. Both maintain the same accuracy specification (±0.5°C in the 0°C to 70°C range).

Q: Are the packaging and pinout identical?

A: Yes. Both parts use the 8-SOIC package with 0.209" width (5.30mm). Physical dimensions and pin configuration are identical, allowing direct PCB substitution without layout modifications.

Q: What is the significance of the product status difference?

A: The original part is classified as obsolete, indicating discontinued manufacturing and limited future availability. The substitute is Active, meaning it is currently manufactured and supported by the supplier, ensuring long-term procurement viability.

Q: Does the substitute meet current compliance standards?

A: Yes. The DS1620S+T&R is ROHS3 compliant, whereas the original is RoHS non-compliant. For applications requiring regulatory compliance with current environmental standards, the substitute is the appropriate choice.

Q: Are there any interface protocol differences between these parts?

A: No. Both parts implement the identical 3-Wire interface (CLK, DQ, RST) and operate within the same 2.7V to 5.5V supply voltage range. Software and hardware interfaces designed for the original part require no modification for the substitute.