LM3420M5X-8.4 Equivalent & Substitute Parts

Part Overview

The LM3420M5X-8.4 is a lithium-ion battery charger IC in SOT-23-5 surface mount packaging, designed for 2-cell battery pack applications with an 8.4V output. The main part number is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

LM3420M5X-8.4

Texas InstrumentsIn Stock: 3851LM3420M5X-8.4 Datasheet

Current PartRFQ

LM3420M5X-8.4/NOPB

Texas InstrumentsIn Stock: 4374LM3420M5X-8.4/NOPB Datasheet

DirectRFQ

LM3420AM5-8.4/NOPB

Texas InstrumentsIn Stock: 2864LM3420AM5-8.4/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM3420M5X-8.4 are grouped based on strict electrical and mechanical compatibility criteria:

Direct Manufacturer Equivalent: LM3420M5X-8.4/NOPB maintains identical specifications to the main part number, with the primary distinction being packaging format (Tape & Reel) and active product status. This part shares all critical parameters: 8.4V battery pack voltage, 20V maximum supply voltage, 2-cell lithium-ion configuration, SOT-23-5 package, and -40°C to 85°C operating temperature range.

Parametric Equivalent: LM3420AM5-8.4/NOPB is functionally equivalent across all core parameters including battery chemistry, cell count, voltage ratings, package type, and thermal specifications. The documented difference is the specified charge current maximum of 1A, which does not affect substitution eligibility when this parameter is not constrained in the application.

All substitute parts maintain identical compliance certifications: ROHS3 Compliant, REACH Unaffected, MSL Level 1, and EAR99 ECCN classification.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the obsolete LM3420M5X-8.4, the active product LM3420M5X-8.4/NOPB is the primary substitute, offering identical electrical and mechanical specifications with the advantage of current manufacturing availability and active product support status.

The LM3420AM5-8.4/NOPB serves as a parametric equivalent when the 1A charge current specification aligns with application requirements. Both active alternatives maintain full compliance with ROHS3, REACH, and regulatory classifications identical to the original part.

Selection between the two active substitutes should be based on packaging requirements (Tape & Reel format) and inventory availability, as both meet all electrical and thermal specifications for 2-cell lithium-ion battery charging at 8.4V output.

Frequently Asked Questions (FAQ)

Q: Can LM3420M5X-8.4/NOPB directly replace LM3420M5X-8.4 in existing designs?

A: Yes. Both parts share identical electrical specifications, package type (SOT-23-5), and thermal operating range (-40°C to 85°C). The primary difference is product status (active vs. obsolete) and packaging format (Tape & Reel).

Q: What is the difference between LM3420M5X-8.4/NOPB and LM3420AM5-8.4/NOPB?

A: Both are parametric equivalents for 2-cell, 8.4V lithium-ion battery charging applications. The LM3420AM5-8.4/NOPB specifies a maximum charge current of 1A. Both use identical SOT-23-5 packaging and maintain the same voltage and thermal specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The main part and all listed substitutes are ROHS3 Compliant with MSL Level 1 (Unlimited) moisture sensitivity rating.

Q: Does packaging format affect electrical compatibility?

A: No. Tape & Reel packaging is a delivery and handling format only. The electrical and mechanical specifications of the die and package remain identical across all listed parts.

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Yes, provided the PCB footprint accommodates the SC-74A/SOT-753 package format. All listed parts use this identical package specification.