SN74LVC16646ADGVR Equivalent & Substitute Parts

Part Overview

The SN74LVC16646ADGVR is a non-inverting transceiver IC manufactured by Texas Instruments, featuring 2 elements with 8 bits per element and 3-state output capability. Designed for 56-TVSOP surface mount packaging, this component operates across a 1.65V to 3.6V supply voltage range with 24mA output current capability. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing design requirements and production continuity.

Substiute Parts

SN74LVC16646ADGVR

Texas InstrumentsIn Stock: 1053SN74LVC16646ADGVR Datasheet

Current PartRFQ

SN74LVC16646ADLR

Texas InstrumentsIn Stock: 799SN74LVC16646ADLR Datasheet

MFR RecommendedRFQ

SN74ALVCH16646DGVR

Texas InstrumentsIn Stock: 1177SN74ALVCH16646DGVR Datasheet

Parametric EquivalentRFQ

SN74LVCH16543ADGVR

Texas InstrumentsIn Stock: 984SN74LVCH16543ADGVR Datasheet

Parametric EquivalentRFQ

SN74LVCH16952ADGVR

Texas InstrumentsIn Stock: 1230SN74LVCH16952ADGVR Datasheet

Parametric EquivalentRFQ

74LCX16646MTDX

Fairchild SemiconductorIn Stock: 349574LCX16646MTDX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74LVC16646ADGVR are classified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Critical Parameters for Substitution:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 2
• Number of Bits per Element: 8
• Output Type: 3-State
• Current - Output High, Low: 24mA, 24mA
• Voltage - Supply: 1.65V ~ 3.6V (or compatible range)
• Operating Temperature: -40°C ~ 85°C (TA)
• Mounting Type: Surface Mount
• Package / Case: 56-TFSOP or equivalent 56-pin thin small outline package

MFR Recommended Substitutes maintain identical electrical specifications and package footprint compatibility, offering direct replacement capability with active product status.

Parametric Equivalents share all critical electrical parameters and operate within the same voltage and temperature ranges, with package variations that remain mechanically compatible for standard PCB assembly processes.

Parameter Comparison

Engineering Selection Recommendations

SN74LVC16646ADLR is the manufacturer-recommended primary substitute. This Texas Instruments part maintains identical electrical specifications and base product compatibility while offering active product status. The package transition from 56-TVSOP to 56-SSOP requires PCB layout modification but presents no electrical incompatibility. This option is preferred for new designs requiring long-term supply assurance.

SN74ALVCH16646DGVR and SN74LVCH16952ADGVR are parametric equivalents with active product status and identical package footprint (56-TFSOP). Both maintain full electrical parameter compatibility and represent direct mechanical substitutes suitable for designs where PCB layout preservation is required.

74LCX16646MTDX from Fairchild Semiconductor is an active alternative meeting all critical electrical parameters. The supply voltage range extends to 2V minimum rather than 1.65V, which may limit applicability in ultra-low-voltage designs. Package width variation (0.240" versus 0.173") requires PCB footprint verification.

SN74LVCH16543ADGVR is classified as discontinued at DiGi Electronics and should be avoided for new production designs despite meeting all electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can SN74LVC16646ADLR replace SN74LVC16646ADGVR directly on the same PCB?

A: Electrical substitution is complete. However, the package changes from 56-TVSOP to 56-SSOP, requiring PCB layout modification. The pin configuration remains compatible, but pad dimensions and spacing differ. PCB redesign is necessary.

Q: What is the difference between the 74LVC, 74ALVCH, and 74LVCH series?

A: All three series share identical electrical specifications for this application: 2-element, 8-bit transceiver with 3-state output, 24mA drive capability, and 1.65V to 3.6V supply range. Series designation reflects internal logic family implementation but does not affect functional compatibility for this part category.

Q: Is 74LCX16646MTDX suitable for 1.65V supply applications?

A: No. The 74LCX16646MTDX minimum supply voltage is 2V, making it incompatible with designs requiring 1.65V operation. Verify system supply voltage requirements before selecting this substitute.

Q: Can I use SN74LVCH16543ADGVR for new production?

A: This part is discontinued at DiGi Electronics and should not be selected for new designs. Choose from active alternatives: SN74LVC16646ADLR, SN74ALVCH16646DGVR, or SN74LVCH16952ADGVR.

Q: Are all substitutes RoHS3 compliant?

A: Texas Instruments substitutes (SN74LVC16646ADLR, SN74ALVCH16646DGVR, SN74LVCH16543ADGVR, SN74LVCH16952ADGVR) are confirmed ROHS3 compliant. The Fairchild 74LCX16646MTDX does not specify RoHS status in available documentation.

Q: What is the inventory status for active substitutes?

A: SN74LVC16646ADLR: 717 pcs; SN74ALVCH16646DGVR: 1121 pcs; SN74LVCH16952ADGVR: 1130 pcs; 74LCX16646MTDX: 3471 pcs. Verify current availability with your supplier before design commitment.