BQ2019PWR Battery Monitor IC Equivalent & Substitute Parts

Part Overview

The BQ2019PWR is an active, production-status battery monitor IC manufactured by Texas Instruments, designed for multi-chemistry battery pack monitoring across 1 to 3 cells. This Surface Mount device in 8-TSSOP packaging integrates HDQ interface communication for real-time battery status monitoring. Substitute parts are identified when equivalent functional performance, package compatibility, and compliance certifications align with the original specification, enabling component interchangeability in applications where battery chemistry or cell count flexibility permits.

Substiute Parts

BQ2019PWR

Texas InstrumentsIn Stock: 2192BQ2019PWR Datasheet

Current PartRFQ

DS2781E+T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 12355DS2781E+T&R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BQ2019PWR is determined by the following critical parameters:

Package Compatibility: Both the main part and substitute must use 8-TSSOP Surface Mount packaging with identical 0.173" width (4.40mm) to ensure PCB footprint compatibility without layout redesign.

Functional Classification: Both parts must operate as battery monitor ICs with active product status and equivalent operating temperature range (-20°C ~ 70°C TA).

Interface Protocol: The HDQ interface on the BQ2019PWR differs from the 1-Wire interface on substitute parts; however, both are single-wire serial communication protocols suitable for battery monitoring applications where firmware adaptation is feasible.

Battery Chemistry Scope: The BQ2019PWR supports multi-chemistry monitoring (1 ~ 3 cells), while the DS2781E+T&R is optimized for Lithium Ion/Polymer chemistry (1 ~ 2 cells). Substitution is valid when the application operates within the 1 ~ 2 cell range and uses Lithium Ion/Polymer battery chemistry.

Compliance & Certifications: Both parts maintain ROHS3 compliance, REACH Unaffected status, and identical ECCN/HTSUS classifications, ensuring regulatory equivalence.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (BQ2019PWR): Retain the BQ2019PWR for applications requiring multi-chemistry battery support across 1 to 3 cells with HDQ interface integration. Active product status and established supply chain (2152 Pcs in stock) support production continuity.

Substitute Selection (DS2781E+T&R): The DS2781E+T&R is suitable as a substitute when all of the following conditions are met: (1) application operates with Lithium Ion/Polymer battery chemistry, (2) battery pack configuration is limited to 1 or 2 cells, (3) firmware can accommodate 1-Wire protocol instead of HDQ, and (4) the improved MSL rating (1 vs. 2) provides manufacturing advantage. Active product status and higher inventory availability (12290 Pcs) support supply security.

Compliance Equivalence: Both parts maintain identical ROHS3, REACH, ECCN, and HTSUS classifications, ensuring regulatory interchangeability within the specified application scope.

Frequently Asked Questions (FAQ)

Q: Can DS2781E+T&R replace BQ2019PWR in all applications? A: No. Substitution requires three conditions: (1) battery chemistry must be Lithium Ion/Polymer, (2) cell count must not exceed 2 cells, and (3) the system firmware must support 1-Wire protocol communication instead of HDQ.

Q: What is the primary difference between these parts? A: The BQ2019PWR supports multi-chemistry monitoring across 1 to 3 cells using HDQ interface, while DS2781E+T&R is optimized for Lithium Ion/Polymer chemistry across 1 to 2 cells using 1-Wire interface.

Q: Are the packages identical? A: Yes. Both parts use 8-TSSOP Surface Mount packaging with 0.173" width (4.40mm), ensuring identical PCB footprint compatibility without layout modification.

Q: Do both parts meet the same compliance standards? A: Yes. Both parts are ROHS3 compliant, REACH Unaffected, and share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Q: What is the difference in Moisture Sensitivity Level (MSL)? A: BQ2019PWR has MSL 2 (1 Year shelf life), while DS2781E+T&R has MSL 1 (Unlimited shelf life). Lower MSL ratings provide extended storage capability and reduced moisture-related failures during manufacturing.

Q: Which part should I select for a new design? A: For Lithium Ion/Polymer battery packs with 1 to 2 cells, DS2781E+T&R is preferred due to superior MSL rating and higher inventory availability. For multi-chemistry or 3-cell applications, BQ2019PWR is the only suitable option.