BQ2057CTSTRG4 Equivalent & Substitute Parts

Part Overview

The BQ2057CTSTRG4 is a single-cell lithium ion/polymer battery charger IC manufactured by Texas Instruments in an 8-TSSOP surface mount package. This part is discontinued at DiGi Electronics, making substitute parts necessary for ongoing production and maintenance applications. The BQ2057 series provides programmable constant-current charging with a maximum supply voltage of 15V and operates across an industrial temperature range of -20°C to 70°C.

Substiute Parts

BQ2057CTSTRG4

Texas InstrumentsIn Stock: 15999BQ2057CTSTRG4 Datasheet

Current PartRFQ

BQ2057CTSTR

Texas InstrumentsIn Stock: 16510BQ2057CTSTR Datasheet

MFR RecommendedRFQ

BQ2057CTS

Texas InstrumentsIn Stock: 8124BQ2057CTS Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the BQ2057CTSTRG4 is determined by strict equivalence across the following critical parameters:

• Battery chemistry and cell count (Lithium Ion/Polymer, 1 cell)
• Battery pack voltage (4.2V)
• Maximum supply voltage (15V)
• Charging current control method (Constant - Programmable)
• Package type and dimensions (8-TSSOP, 0.173" × 4.40mm)
• Surface mount mounting type
• Operating temperature range (-20°C ~ 70°C)
• Compliance certifications (ROHS3, REACH Unaffected)

The BQ2057 base product number encompasses multiple packaging and distribution variants. All substitute parts maintain identical electrical specifications and physical package dimensions, differing only in packaging format and product status.

Parameter Comparison

Engineering Selection Recommendations

Both BQ2057CTSTR and BQ2057CTS are direct functional equivalents to the BQ2057CTSTRG4. Selection between these substitutes should be based on:

Product Status: BQ2057CTSTR and BQ2057CTS are both active products with confirmed inventory availability, whereas the original BQ2057CTSTRG4 is discontinued. Active status ensures long-term supply chain reliability and continued manufacturer support.

Compliance Certifications: All three parts maintain identical ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for electronics manufacturing and distribution.

Packaging Considerations: The primary difference between substitutes is packaging format. BQ2057CTSTR is supplied in Cut Tape and Digi-Reel formats, while BQ2057CTS is supplied in Tube format. Selection depends on assembly line equipment compatibility and procurement volume requirements.

Frequently Asked Questions (FAQ)

Q: Are BQ2057CTSTR and BQ2057CTS electrically identical to BQ2057CTSTRG4?

A: Yes. All three parts share the same base product number (BQ2057), battery chemistry (Lithium Ion/Polymer), cell count (1), voltage specifications (4.2V battery, 15V max supply), charging control method (Constant - Programmable), package type (8-TSSOP), and operating temperature range (-20°C to 70°C). Electrical performance is equivalent.

Q: What is the difference between the substitute parts?

A: The substitutes differ only in packaging format and product status. BQ2057CTSTR is available in Cut Tape and Digi-Reel formats and is active. BQ2057CTS is available in Tube format and is active. The BQ2057CTSTRG4 original part was supplied in Digi-Reel format but is now discontinued.

Q: Can I use BQ2057CTS in place of BQ2057CTSTR?

A: Yes, from an electrical and functional standpoint. Both parts are electrically identical. The choice depends on your assembly process requirements. If your pick-and-place equipment uses tape feeders, BQ2057CTSTR (Cut Tape) is appropriate. If your process uses tube-fed components, BQ2057CTS is appropriate.

Q: Are there any compliance or certification differences?

A: No. All three parts maintain identical ROHS3 compliance, REACH unaffected status, and Moisture Sensitivity Level (MSL) rating of 2 (1 Year). Regulatory and environmental compliance is equivalent across all variants.

Q: Why is the original BQ2057CTSTRG4 discontinued?

A: Product discontinuation is a manufacturer decision typically driven by market demand, product line consolidation, or transition to newer product generations. The active substitute parts (BQ2057CTSTR and BQ2057CTS) provide continued access to the BQ2057 charger IC functionality.