SN74GTLPH1645ZQLR Equivalent & Substitute Parts

Part Overview

The SN74GTLPH1645ZQLR is a mixed signal translator IC designed for bidirectional signal conversion between LVTTL and GTLP logic levels. This device features 2 circuits with 8 channels per circuit, providing tri-state non-inverted output in a 56-BGA Microstar Junior package. The part is classified as obsolete, making identification of active equivalent substitutes essential for ongoing design support and procurement.

Substiute Parts

SN74GTLPH1645ZQLR

Texas InstrumentsIn Stock: 1134SN74GTLPH1645ZQLR Datasheet

Current PartRFQ

SN74GTLPH1645DGVR

Texas InstrumentsIn Stock: 1970SN74GTLPH1645DGVR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74GTLPH1645ZQLR is determined by strict equivalence across the following critical parameters:

• Translator Type: Mixed Signal (required match)
• Channel Configuration: Bidirectional, 2 circuits, 8 channels per circuit (required match)
• Signal Levels: LVTTL input to GTLP output (required match)
• Output Characteristics: Tri-State, Non-Inverted (required match)
• Operating Temperature Range: -40°C ~ 85°C (required match)
• Base Product Number: 74GTLPH1645 (required match)
• Compliance: ROHS3 Compliant, REACH Unaffected (required match)

The primary distinction between the main part and its substitute lies in packaging format and product status. The SN74GTLPH1645DGVR maintains identical electrical and functional specifications while offering an active product status and alternative packaging configuration.

Parameter Comparison

Engineering Selection Recommendations

The SN74GTLPH1645DGVR is the direct functional equivalent to the SN74GTLPH1645ZQLR. Both parts maintain identical electrical specifications, signal translation characteristics, and compliance certifications. The substitute part carries active product status from Texas Instruments, ensuring continued availability and manufacturing support.

Selection between these parts is determined by packaging requirements. The main part uses a 56-BGA Microstar Junior package, while the substitute employs a 56-TFSOP configuration. PCB layout, thermal management, and assembly process capabilities should guide packaging selection. Both packages are surface mount and support equivalent electrical performance.

Both parts satisfy ROHS3 compliance and REACH requirements, making either suitable for applications with environmental regulatory constraints.

Frequently Asked Questions (FAQ)

Q: Can the SN74GTLPH1645DGVR directly replace the SN74GTLPH1645ZQLR?

A: Yes, electrically and functionally. Both parts provide identical signal translation from LVTTL to GTLP with the same circuit configuration, channel count, and operating specifications. The primary consideration is packaging compatibility with your PCB design.

Q: What is the key difference between these two parts?

A: The main difference is packaging format. The ZQLR uses a 56-BGA Microstar Junior package, while the DGVR uses a 56-TFSOP package. Electrical performance and functional specifications are identical.

Q: Why is the original part marked as obsolete?

A: The SN74GTLPH1645ZQLR is classified as obsolete by Texas Instruments. The SN74GTLPH1645DGVR remains in active production, providing a path for continued design support and component procurement.

Q: Are there any compliance differences between these parts?

A: No. Both parts are ROHS3 compliant with MSL 1 (Unlimited) and REACH Unaffected status. Compliance certifications are identical.

Q: What should I consider when switching from BGA to TFSOP packaging?

A: Evaluate PCB layout constraints, assembly capabilities, thermal requirements, and signal integrity needs. Both packages support the same electrical specifications, but physical footprint and assembly processes differ. Consult your manufacturing partner regarding equipment compatibility.