DS1624S/T&R Temperature Sensor - Equivalent & Substitute Parts

Part Overview

The DS1624S/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 with 11-bit resolution and I2C output interface. The device operates on a 2.7V to 5.5V supply and features one-shot and standby modes for flexible power management.

This part is currently listed as obsolete. Identifying equivalent and substitute components is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this sensor.

Substiute Parts

DS1624S/T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 1101DS1624S/T&R Datasheet

Current PartRFQ

DS1624S+T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 5289DS1624S+T&R Datasheet

DirectRFQ

MCP9844T-BE/MNY

Microchip TechnologyIn Stock: 6644MCP9844T-BE/MNY Datasheet

MFR RecommendedRFQ

MCP9844T-BE/MNYAA

Microchip TechnologyIn Stock: 1241MCP9844T-BE/MNYAA Datasheet

MFR RecommendedRFQ

MCP9844T-BE/MNYAB

Microchip TechnologyIn Stock: 6664MCP9844T-BE/MNYAB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DS1624S/T&R is determined by the following critical parameters:

Primary Compatibility Criteria:

• I2C serial interface (2-wire communication protocol)
• Operating temperature range encompassing or exceeding -55°C to 125°C
• 8-pin surface mount package (8-SOIC or equivalent footprint)
• Supply voltage compatibility within 2.7V to 5.5V range
• Digital output with comparable resolution and accuracy specifications

Substitute Categories:

1. Direct Equivalent (Same Manufacturer, Different Packaging): DS1624S+T&R maintains identical electrical specifications and functionality with improved RoHS3 compliance and active product status.

2. Functional Equivalents (Alternative Manufacturer): MCP9844T-BE series (Microchip Technology) provides I2C-based temperature monitoring with comparable resolution and interface characteristics, though with different operating temperature range (-40°C to 125°C) and package configuration (8-TDFN).

Parameter Comparison

Engineering Selection Recommendations

DS1624S+T&R is the preferred direct substitute for DS1624S/T&R. Both parts share identical electrical specifications, functional characteristics, and package footprint. The primary advantage of DS1624S+T&R is its active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment for new designs or production continuity.

MCP9844T-BE Series (MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, MCP9844T-BE/MNYAB) represents a functional alternative when DS1624S+T&R is unavailable. These parts maintain I2C interface compatibility and active product status with ROHS3 compliance. Design considerations include:

• Operating temperature range limited to -40°C minimum (versus -55°C for DS1624 series)
• Supply voltage range of 1.7V to 3.6V requires circuit redesign if 5.5V operation is required
• Package change from 8-SOIC to 8-TDFN requires PCB layout modification
• Accuracy specification of ±3°C maximum versus ±0.5°C for DS1624S/T&R in the 0°C to 70°C range

Selection between MCP9844T-BE variants depends on packaging requirements: MCP9844T-BE/MNY (Cut Tape & Digi-Reel), MCP9844T-BE/MNYAA (Tape & Reel), or MCP9844T-BE/MNYAB (standard packaging).

Frequently Asked Questions (FAQ)

Q: Can DS1624S+T&R be used as a direct replacement for DS1624S/T&R without circuit modifications?

A: Yes. DS1624S+T&R is electrically and functionally identical to DS1624S/T&R. Both parts use the same 8-SOIC package, I2C interface, supply voltage range (2.7V to 5.5V), and temperature measurement specifications. No circuit redesign is required.

Q: What are the key differences between DS1624S/T&R and MCP9844T-BE series?

A: The primary differences are: (1) Operating temperature minimum of -40°C for MCP9844T-BE versus -55°C for DS1624S/T&R; (2) Supply voltage range of 1.7V to 3.6V for MCP9844T-BE versus 2.7V to 5.5V for DS1624S/T&R; (3) Package type is 8-TDFN for MCP9844T-BE versus 8-SOIC for DS1624S/T&R; (4) Accuracy specification of ±3°C maximum for MCP9844T-BE versus ±0.5°C for DS1624S/T&R in the 0°C to 70°C range.

Q: Is the MCP9844T-BE series suitable for applications requiring -55°C operation?

A: No. The MCP9844T-BE series has a minimum operating temperature of -40°C. Applications requiring -55°C operation must use DS1624S+T&R or equivalent DS1624 series devices.

Q: What packaging options are available for MCP9844T-BE?

A: Three packaging variants are available: MCP9844T-BE/MNY (Cut Tape & Digi-Reel), MCP9844T-BE/MNYAA (Tape & Reel), and MCP9844T-BE/MNYAB (standard packaging). All three variants are electrically identical; selection depends on procurement and assembly requirements.

Q: Can MCP9844T-BE be used in a 5V supply circuit designed for DS1624S/T&R?

A: No. MCP9844T-BE has a maximum supply voltage of 3.6V and cannot operate at 5V. Circuit redesign is required to reduce supply voltage to the 1.7V to 3.6V range if MCP9844T-BE is selected as a substitute.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. DS1624S+T&R and all MCP9844T-BE variants are ROHS3 compliant. The original DS1624S/T&R is RoHS non-compliant.