BQ20Z655DBT Equivalent & Substitute Parts

Part Overview

The BQ20Z655DBT is a battery multi-function controller IC from Texas Instruments designed for lithium ion and polymer battery management in 2 to 4 cell configurations. This device operates as a gas gauge with impedance tracking capability, providing comprehensive fault protection including over-current, over-temperature, over/under-voltage, and short-circuit detection via SMBus interface.

The BQ20Z655DBT is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support long-term product maintenance and production requirements.

Substiute Parts

BQ20Z655DBT

Texas InstrumentsIn Stock: 904BQ20Z655DBT Datasheet

Current PartRFQ

BQ20Z65DBT-R1

Texas InstrumentsIn Stock: 1689BQ20Z65DBT-R1 Datasheet

Parametric EquivalentRFQ

BQ34Z651DBT

Texas InstrumentsIn Stock: 868BQ34Z651DBT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BQ20Z655DBT is determined by the following critical parameters:

Primary Substitution Criteria:

• Battery Chemistry: Lithium Ion/Polymer
• Number of Cells: 2 ~ 4
• Function: Multi-Function Controller
• Interface: SMBus
• Operating Temperature Range: -40°C ~ 85°C (TA)
• Package / Case: 44-TFSOP (0.173", 4.40mm Width)
• Supplier Device Package: 44-TSSOP
• Fault Protection: Over Current, Over Temperature, Over/Under Voltage, Short Circuit

Compliance & Regulatory Criteria:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 2 (1 Year)
• REACH Status: REACH Unaffected

Parts meeting all primary substitution criteria and compliance requirements are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

Both BQ20Z65DBT-R1 and BQ34Z651DBT meet all parametric equivalence criteria for direct substitution with the BQ20Z655DBT. All three parts share identical electrical specifications, thermal operating ranges, package configurations, and compliance certifications.

Selection between equivalent parts should be based on supply chain availability and inventory status. The BQ20Z65DBT-R1 is available in tube packaging with 1592 units in stock. The BQ34Z651DBT is available with 842 units in stock. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity in applications requiring these certifications.

Frequently Asked Questions (FAQ)

Q: Can BQ20Z65DBT-R1 and BQ34Z651DBT be used interchangeably with BQ20Z655DBT?

A: Yes. Both parts are parametric equivalents meeting all critical substitution criteria: identical battery chemistry support (Lithium Ion/Polymer), cell count range (2-4), fault protection features, SMBus interface, operating temperature range (-40°C to 85°C), and 44-TSSOP package configuration. All compliance certifications are identical.

Q: Are there packaging differences between the substitute parts?

A: The BQ20Z65DBT-R1 is supplied in tube packaging. The BQ20Z655DBT and BQ34Z651DBT packaging specifications are not specified in the provided data. All three parts use the same 44-TFSOP (0.173", 4.40mm Width) case and 44-TSSOP supplier device package.

Q: Do all substitute parts maintain the same compliance status?

A: Yes. All three parts are ROHS3 compliant, REACH unaffected, classified under ECCN EAR99, and share the same HTSUS code (8542.39.0001). Moisture sensitivity level is identical at MSL 2 (1 Year) for all parts.

Q: What is the Impedance Track™ series?

A: Impedance Track™ is the Texas Instruments battery management technology series to which all three parts belong. This series designation indicates compatibility in the battery management controller function across all listed parts.

Q: Are there any functional differences between the three parts?

A: No functional differences exist. All three parts provide identical multi-function controller capabilities including over-current, over-temperature, over/under-voltage, and short-circuit protection via SMBus interface for 2 to 4 cell lithium ion and polymer battery systems.