LM2642MTC Equivalent & Substitute Parts

Part Overview

The LM2642MTC is a synchronous step-down controller IC designed for embedded systems and console/set-top box applications. It operates across a 4.5V to 30V supply voltage range with a 1mA supply current requirement and supports a 28-TSSOP surface mount package. The device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

LM2642MTC

Texas InstrumentsIn Stock: 1359LM2642MTC Datasheet

Current PartRFQ

LM2642MTC/NOPB

National SemiconductorIn Stock: 3147LM2642MTC/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2642MTC is determined by strict alignment of the following electrical and mechanical parameters:

• Voltage supply range: 4.5V ~ 30V
• Supply current: 1mA
• Operating temperature range: -40°C ~ 125°C
• Package type: 28-TSSOP surface mount
• Base product number: LM2642
• Functional classification: Synchronous step-down controller for embedded systems and console/set-top box applications

The LM2642MTC/NOPB qualifies as a direct substitute based on identical electrical specifications, matching package configuration, and equivalent functional performance within the specified application domain.

Parameter Comparison

Engineering Selection Recommendations

The LM2642MTC/NOPB is the direct equivalent for the obsolete LM2642MTC. Both parts share identical electrical parameters, package specifications, and export classifications. The primary distinction is product status: the LM2642MTC is obsolete while the LM2642MTC/NOPB maintains active status with current inventory availability (3096 pcs). For new designs or system replacements, the LM2642MTC/NOPB is the appropriate selection. Both parts carry identical ECCN and HTSUS classifications, ensuring regulatory consistency in procurement and deployment.

Frequently Asked Questions (FAQ)

Q: Can the LM2642MTC/NOPB directly replace the LM2642MTC in existing designs?

A: Yes. Both parts are electrically and mechanically identical, with matching voltage supply ranges (4.5V ~ 30V), supply current (1mA), operating temperature range (-40°C ~ 125°C), and 28-TSSOP package configuration. No circuit modifications are required.

Q: What is the significance of the "/NOPB" suffix in LM2642MTC/NOPB?

A: The "/NOPB" designation indicates the part is supplied without plumbum (lead-free), reflecting RoHS compliance in the packaging specification. This is a standard manufacturer notation and does not affect electrical or mechanical compatibility.

Q: Why is the LM2642MTC classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured by Texas Instruments. The LM2642MTC/NOPB, maintained by National Semiconductor, provides continued availability for this product line.

Q: Are there any compliance differences between the two parts?

A: Both parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. The primary difference is RoHS status documentation; however, both are suitable for equivalent applications in embedded systems and console/set-top box power management.

Q: What is the moisture sensitivity level (MSL) for the LM2642MTC/NOPB?

A: The MSL for the LM2642MTC is specified as 3 (168 Hours). Equivalent MSL information for the LM2642MTC/NOPB should be verified with the supplier or National Semiconductor technical documentation.