74ACTQ16543SSCX Equivalent & Substitute Parts

Part Overview

The 74ACTQ16543SSCX is a non-inverting transceiver IC manufactured by onsemi, featuring 2 elements with 8 bits per element and 3-state output capability. This component operates within the 4.5V to 5.5V supply voltage range and is housed in a 56-SSOP package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations.

Substiute Parts

74ACTQ16543SSCX

onsemiIn Stock: 96174ACTQ16543SSCX Datasheet

Current PartRFQ

74ACT16543DGGR

Texas InstrumentsIn Stock: 215274ACT16543DGGR Datasheet

SimilarRFQ

74ACT16543DL

Texas InstrumentsIn Stock: 140074ACT16543DL Datasheet

SimilarRFQ

74ACT16543DLR

Texas InstrumentsIn Stock: 189574ACT16543DLR Datasheet

Parametric EquivalentRFQ

74ACT16646DLR

Texas InstrumentsIn Stock: 223874ACT16646DLR Datasheet

Parametric EquivalentRFQ

74ACT16652DLR

Texas InstrumentsIn Stock: 96374ACT16652DLR Datasheet

Parametric EquivalentRFQ

74ACT16657DLR

Texas InstrumentsIn Stock: 87174ACT16657DLR Datasheet

Parametric EquivalentRFQ

74FCT162652ATPVCT

Texas InstrumentsIn Stock: 92274FCT162652ATPVCT Datasheet

Parametric EquivalentRFQ

CY74FCT162543TPVCT

Texas InstrumentsIn Stock: 1082CY74FCT162543TPVCT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74ACTQ16543SSCX is determined by strict equivalence across the following critical parameters:

• 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: 4.5V ~ 5.5V
• Operating Temperature: -40°C ~ 85°C (TA)
• Mounting Type: Surface Mount
• Package / Case: 56-BSSOP or compatible 56-pin SSOP variants

Substitute parts are grouped into two categories: direct pin-compatible equivalents (same base product number or functionally identical) and parametric equivalents (different base product numbers but identical electrical and mechanical specifications). All listed substitutes maintain full compatibility with the original part's electrical performance and thermal operating range.

Parameter Comparison

Engineering Selection Recommendations

For new designs and ongoing system support, the 74ACT16543DLR is the primary recommended substitute. This part is manufactured by Texas Instruments, maintains active product status, and is ROHS3 compliant. It provides identical electrical specifications and operates in the same temperature range as the original 74ACTQ16543SSCX.

The 74ACT16543DGGR offers an alternative with active status but uses a 56-TFSOP package variant (0.240", 6.10mm width) instead of the standard 56-BSSOP package. This substitution requires PCB layout verification to confirm mechanical compatibility.

The 74ACT16646DLR and 74ACT16652DLR are parametric equivalents with active product status and ROHS3 compliance. These parts maintain identical electrical performance and thermal specifications but feature different base product numbers, indicating potential functional variations in specific application contexts.

For legacy system maintenance where inventory constraints exist, the 74ACT16543DL remains available with Last Time Buy status, providing a direct package match to the original part.

The 74FCT162652ATPVCT and CY74FCT162543TPVCT are obsolete alternatives with ROHS3 compliance. These parts should be considered only when active alternatives are unavailable.

Frequently Asked Questions (FAQ)

Q: Can 74ACT16543DLR be used as a direct replacement for 74ACTQ16543SSCX?

A: Yes. Both parts share identical electrical specifications: 2-element, 8-bit transceiver configuration, 3-state output, 24mA output current, 4.5V to 5.5V supply voltage, and -40°C to 85°C operating temperature. The 74ACT16543DLR is housed in the same 56-BSSOP package and is pin-compatible.

Q: What is the difference between 74ACT16543DL and 74ACT16543DLR?

A: Both parts are electrically and mechanically identical. The primary difference is packaging format: 74ACT16543DL is supplied in tube packaging, while 74ACT16543DLR is supplied in tape and reel format. The DLR variant is recommended for automated assembly processes.

Q: Is the 74ACT16543DGGR compatible with the original part?

A: The 74ACT16543DGGR is electrically compatible but uses a 56-TFSOP package (0.240", 6.10mm width) instead of the 56-BSSOP package (0.295", 7.50mm width). PCB footprint verification is required before substitution.

Q: Why are there multiple substitute part numbers with different base numbers (74ACT16543, 74ACT16646, 74ACT16652, 74ACT16657)?

A: These parts are parametric equivalents sharing identical electrical and thermal specifications but may differ in internal logic configuration or specific functional implementation. All maintain the same 2-element, 8-bit, 3-state transceiver architecture and are electrically interchangeable for this application category.

Q: Are obsolete parts like 74FCT162652ATPVCT and CY74FCT162543TPVCT suitable for new designs?

A: Obsolete parts should not be selected for new designs. Use active-status alternatives such as 74ACT16543DLR, 74ACT16646DLR, or 74ACT16652DLR instead.

Q: What does ROHS3 compliance mean for these parts?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials in electrical and electronic equipment. This certification is relevant for applications subject to EU environmental regulations.

Q: Can I mix different substitute part numbers in the same design?

A: All listed substitutes maintain identical electrical specifications and thermal operating ranges. However, design documentation should specify a single approved part number to ensure manufacturing consistency and supply chain traceability.