DS1624+ Temperature Sensor - Equivalent & Substitute Parts

Part Overview

The DS1624+ 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. This through-hole 8-DIP component communicates via I2C interface and operates on supply voltages between 2.7V and 5.5V. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent functional performance can be achieved through alternative manufacturers while maintaining critical electrical and mechanical compatibility within the specified parameter ranges.

Key Parameters

Parameter	DS1624+
Sensor Type	Digital, Local
Sensing Temperature Range	-55°C ~ 125°C
Output Type	I2C
Voltage Supply	2.7V ~ 5.5V
Resolution	11 bits
Accuracy	±0.5°C (0°C ~ 70°C) / ±2°C (-55°C ~ 125°C)
Operating Temperature	-55°C ~ 125°C
Mounting Type	Through Hole
Package	8-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the DS1624+ are identified based on the following critical parameters:

Output Interface: I2C (2-Wire Serial) compatibility
Sensing Temperature Range: Minimum coverage of -40°C to 125°C (overlaps with DS1624+ operating range)
Supply Voltage: Compatibility within 1.7V to 3.6V range (subset of DS1624+ 2.7V ~ 5.5V)
Sensor Type: Internal temperature monitoring capability
Product Status: Active manufacturing status
Compliance: ROHS3 and REACH compliance maintained

The MCP9844 series (MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, MCP9844T-BE/MNYAB) from Microchip Technology meets these substitution criteria. These parts operate as internal temperature sensors with I2C output and maintain the required compliance certifications. Packaging differences (surface mount 8-TDFN versus through-hole 8-DIP) represent the primary mechanical distinction and require circuit board layout adaptation.

Parameter Comparison

Parameter	DS1624+	MCP9844T-BE/MNY	MCP9844T-BE/MNYAA	MCP9844T-BE/MNYAB
Manufacturer	Analog Devices Inc./Maxim Integrated	Microchip Technology	Microchip Technology	Microchip Technology
Sensor Type	Digital, Local	Internal	Internal	Internal
Sensing Temperature Range	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Output Type	I2C	2-Wire Serial, I2C	2-Wire Serial, I2C	2-Wire Serial, I2C
Voltage Supply	2.7V ~ 5.5V	1.7V ~ 3.6V	1.7V ~ 3.6V	1.7V ~ 3.6V
Accuracy	±0.5°C (0°C ~ 70°C) / ±2°C (-55°C ~ 125°C)	±3°C (Max)	±3°C (Max)	±3°C (Max)
Operating Temperature	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Through Hole	Surface Mount	Surface Mount	Surface Mount
Package	8-DIP (0.300", 7.62mm)	8-TDFN (2x3)	8-TDFN (2x3)	8-TDFN (2x3)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Selection between DS1624+ and MCP9844 series substitutes depends on specific application constraints:

DS1624+ Selection Criteria:

Applications requiring through-hole mounting on existing PCB designs
Systems operating at supply voltages above 3.6V (up to 5.5V)
Temperature measurement requirements below -40°C (down to -55°C)
Designs where ±0.5°C accuracy in the 0°C to 70°C range is mandatory

MCP9844T-BE Series Selection Criteria:

New designs utilizing surface-mount technology
Systems with supply voltage constraints between 1.7V and 3.6V
Applications where ±3°C accuracy is acceptable
Operating temperature range limited to -40°C to 125°C
Designs requiring compact form factor (8-TDFN 2x3mm)

All listed parts maintain active production status, ROHS3 compliance, and REACH unaffected certification. Packaging variants (MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, MCP9844T-BE/MNYAB) differ in tape and reel configurations but share identical electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can MCP9844T-BE series directly replace DS1624+ in existing designs?

A: Direct replacement requires PCB layout modification. DS1624+ uses through-hole 8-DIP packaging while MCP9844T-BE uses surface-mount 8-TDFN packaging. I2C interface compatibility is maintained, but mounting footprints are incompatible.

Q: What is the temperature measurement difference between DS1624+ and MCP9844T-BE?

A: DS1624+ measures local temperature from -55°C to 125°C with ±0.5°C accuracy (0°C to 70°C). MCP9844T-BE measures internal temperature from -40°C to 125°C with ±3°C maximum accuracy. Applications requiring sub-zero measurements below -40°C must use DS1624+.

Q: Are supply voltage requirements compatible?

A: DS1624+ operates on 2.7V to 5.5V. MCP9844T-BE operates on 1.7V to 3.6V. Systems using supply voltages above 3.6V cannot use MCP9844T-BE without voltage regulation. Systems using 2.7V to 3.6V can use either part with appropriate design considerations.

Q: Do all MCP9844T-BE variants have identical electrical performance?

A: Yes. MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, and MCP9844T-BE/MNYAB share identical electrical specifications. Designations indicate packaging and tape configuration differences only.

Q: What compliance certifications apply to substitute parts?

A: All listed parts maintain ROHS3 compliance and REACH unaffected status. No additional certifications are introduced through substitution.

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