PCT2075GVX Temperature Sensor - Equivalent & Substitute Parts

Part Overview

The PCT2075GVX is a digital temperature sensor manufactured by NXP Semiconductors, designed for local temperature measurement across the -55°C to 125°C range with 11-bit resolution and I2C/SMBus output interface. The device operates on supply voltages between 2.7V and 5.5V and features programmable limit thresholds and shutdown mode functionality.

This part is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and system updates.

Substiute Parts

PCT2075GVX

NXP SemiconductorsIn Stock: 4567PCT2075GVX Datasheet

Current PartRFQ

P3T1750DPZ

NXP USA Inc.In Stock: 3521P3T1750DPZ Datasheet

MFR RecommendedRFQ

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 of the PCT2075GVX is determined by the following critical parameters:

• Temperature Sensing Range: The substitute must cover the operating temperature window required by the application. The PCT2075GVX operates from -55°C to 125°C.
• Output Interface: I2C/SMBus compatibility is essential for direct replacement without firmware modification.
• Supply Voltage Compatibility: The substitute must operate within or encompass the 2.7V to 5.5V supply range.
• Resolution and Accuracy: Digital resolution and measurement accuracy determine functional equivalence in temperature monitoring applications.
• Package and Mounting: Surface mount packages with compatible pinout and thermal characteristics.
• Regulatory Compliance: RoHS3 compliance and REACH status must match or exceed the original part.

The substitute parts identified below meet these criteria with variations in resolution, package form factor, and supply voltage ranges that remain functionally compatible for temperature sensing applications.

Parameter Comparison

Engineering Selection Recommendations

P3T1750DPZ is an active NXP product offering I2C and I3C interface support with 12-bit resolution and ±1°C accuracy. The temperature range of -40°C to 125°C covers the upper portion of the PCT2075GVX operating window. The lower supply voltage limit of 1.4V is more restrictive than the original part's 2.7V minimum. The 8-TSSOP package requires PCB layout modification compared to the 6-TSOP original. This part is suitable for applications where the extended lower temperature capability of the PCT2075GVX is not required.

MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, and MCP9844T-BE/MNYAB are Microchip Technology active products with identical electrical specifications. All three variants provide I2C output with alarm and fan control features. The -40°C to 125°C temperature range, 1.7V to 3.6V supply voltage, and ±3°C accuracy represent functional alternatives for applications not requiring the PCT2075GVX's extended -55°C lower temperature limit. The 8-TDFN package differs from the original 6-TSOP form factor. These parts are available in multiple packaging options: MCP9844T-BE/MNY (Cut Tape & Digi-Reel), MCP9844T-BE/MNYAA (Tape & Reel), and MCP9844T-BE/MNYAB (unspecified packaging).

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity.

Frequently Asked Questions (FAQ)

Q: Can the P3T1750DPZ directly replace the PCT2075GVX without PCB modifications?

A: No. The P3T1750DPZ uses an 8-TSSOP package while the PCT2075GVX uses a 6-TSOP package. PCB layout and footprint changes are required. Additionally, the supply voltage range differs (1.4V–3.6V vs. 2.7V–5.5V), requiring verification of circuit compatibility.

Q: What is the primary limitation of the MCP9844T-BE series compared to the PCT2075GVX?

A: The MCP9844T-BE series operates down to -40°C, not -55°C. Applications requiring temperature measurement below -40°C cannot use these parts. The accuracy specification is also ±3°C maximum compared to the PCT2075GVX's ±1°C in the -25°C to 100°C range.

Q: Are the three MCP9844T-BE variants electrically identical?

A: Yes. MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, and MCP9844T-BE/MNYAB have identical electrical specifications and performance. The designations reflect packaging and tape format differences only.

Q: Does the I3C support in the P3T1750DPZ provide backward compatibility with I2C systems?

A: I3C is a superset protocol that maintains I2C backward compatibility. Systems designed for I2C operation will function with the P3T1750DPZ in I2C mode.

Q: What is the impact of the 12-bit resolution in the P3T1750DPZ versus the 11-bit resolution of the PCT2075GVX?

A: The 12-bit resolution provides finer temperature granularity. This is a functional enhancement and does not create compatibility issues. Firmware may require adjustment to utilize the additional resolution bit.

Q: Are all substitute parts available in current production?

A: Yes. P3T1750DPZ, MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, and MCP9844T-BE/MNYAB are all classified as active products with current inventory availability.