MCP98242-BE/ST Equivalent & Substitute Parts

Part Overview

The MCP98242-BE/ST is a temperature monitoring system sensor designed for DIMM DDR memory applications. This component integrates an internal temperature sensor with I2C/SMBus output capability, providing thermal monitoring across the -40°C to 125°C operating range. The device is classified as obsolete, making identification of suitable substitute components essential for ongoing system design and maintenance requirements.

Substiute Parts

MCP98242-BE/ST

Microchip TechnologyIn Stock: 1167MCP98242-BE/ST Datasheet

Current PartRFQ

MCP98243-BE/ST

Microchip TechnologyIn Stock: 1430MCP98243-BE/ST Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MCP98242-BE/ST is determined by the following critical parameters:

Package Compatibility: Both the main part and substitute must use the 8-TSSOP surface mount package to ensure PCB layout compatibility without redesign.

Functional Requirements: The substitute must provide temperature monitoring for DIMM DDR memory applications with internal sensor capability and I2C/SMBus output interface.

Temperature Range: The substitute must support the full -40°C to 125°C operating temperature range required for the application.

Sensor Accuracy: The substitute must maintain ±3°C maximum accuracy specification for reliable thermal monitoring.

Output Capabilities: The substitute must include both alarm output and fan control output functionality.

Supply Voltage: The substitute supply voltage range must encompass or exceed the original 3V to 3.6V requirement.

Compliance Standards: The substitute must maintain ROHS3 compliance and REACH unaffected status for regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

The MCP98243-BE/ST serves as a direct substitute for the obsolete MCP98242-BE/ST in DIMM DDR memory temperature monitoring applications. Both components share identical package geometry, temperature range, sensor accuracy, and core I2C/SMBus interface specifications.

The MCP98243-BE/ST provides an extended supply voltage range (2.7V ~ 5.5V) compared to the original specification (3V ~ 3.6V), offering improved flexibility in power supply design while maintaining full backward compatibility within the original voltage window.

The primary functional difference is the absence of fan control output on the MCP98243-BE/ST. Applications requiring fan control functionality must evaluate alternative solutions or implement external fan control logic independent of the temperature sensor output.

The MCP98243-BE/ST maintains active product status with current manufacturing availability, eliminating obsolescence risk associated with the original component. Both parts maintain identical ROHS3 compliance and REACH unaffected regulatory status.

Frequently Asked Questions (FAQ)

Q: Can the MCP98243-BE/ST replace the MCP98242-BE/ST without PCB modifications?

A: Yes. Both components use identical 8-TSSOP package geometry and pinout compatibility is maintained for core temperature monitoring and alarm functions. No PCB layout changes are required for thermal sensor and alarm signal routing.

Q: What is the impact of the missing fan control output on the MCP98243-BE/ST?

A: The MCP98243-BE/ST does not provide dedicated fan control output. Systems relying on this function must implement fan control through alternative means, such as external logic circuits or microcontroller-based fan management independent of the temperature sensor.

Q: Are the supply voltage ranges compatible?

A: The MCP98243-BE/ST supply range (2.7V ~ 5.5V) encompasses the original MCP98242-BE/ST requirement (3V ~ 3.6V). Systems designed for the original 3V to 3.6V window operate within the substitute's specified range without modification.

Q: Do both parts maintain the same temperature accuracy specification?

A: Yes. Both the MCP98242-BE/ST and MCP98243-BE/ST specify ±3°C maximum accuracy across the -40°C to 125°C operating range, ensuring equivalent thermal monitoring performance.

Q: What is the regulatory compliance status of the substitute?

A: The MCP98243-BE/ST maintains ROHS3 compliance and REACH unaffected status, matching the original component's regulatory requirements for industrial and commercial applications.

Q: Is the MCP98243-BE/ST currently available?

A: Yes. The MCP98243-BE/ST holds active product status with documented inventory availability, eliminating supply chain risk compared to the obsolete MCP98242-BE/ST.