74FCT162543ATPACT Equivalent & Substitute Parts

Part Overview

The 74FCT162543ATPACT is a non-inverting transceiver logic IC manufactured by Texas Instruments, featuring 2 elements with 8 bits per element and 3-state output capability in a 56-TSSOP package. This part operates at 4.5V to 5.5V supply voltage with 24mA output current capability. The device is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

74FCT162543ATPACT

Texas InstrumentsIn Stock: 108174FCT162543ATPACT Datasheet

Current PartRFQ

SN74ALVCH16543DGGR

Texas InstrumentsIn Stock: 2739SN74ALVCH16543DGGR Datasheet

MFR RecommendedRFQ

74ACT16543DGGR

Texas InstrumentsIn Stock: 215274ACT16543DGGR Datasheet

Parametric EquivalentRFQ

74FCT162646CTPACT

Cypress Semiconductor CorpIn Stock: 703174FCT162646CTPACT Datasheet

Parametric EquivalentRFQ

74FCT162652CTPACT

Texas InstrumentsIn Stock: 98574FCT162652CTPACT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74FCT162543ATPACT is determined by the following critical parameters:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 2
• Number of Bits per Element: 8
• Output Type: 3-State
• Output Current Capability: 24mA minimum (High and Low)
• Package / Case: 56-TFSOP
• Operating Temperature Range: -40°C ~ 85°C (TA)

Substitute parts are grouped into two categories based on supply voltage compatibility:

Category 1 - Voltage Compatible (4.5V ~ 5.5V): Parts maintaining identical supply voltage specifications as the original 74FCT162543ATPACT, ensuring direct functional replacement in existing 5V logic systems.

Category 2 - Lower Voltage Operation (1.65V ~ 3.6V): Parts with reduced supply voltage range, suitable for systems operating at lower voltage levels but requiring verification of system voltage requirements before implementation.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation - 74ACT16543DGGR (Texas Instruments): This part maintains identical supply voltage specifications (4.5V ~ 5.5V) and all functional parameters as the original 74FCT162543ATPACT. The device holds active product status with ROHS3 compliance and unlimited moisture sensitivity rating, providing long-term availability and regulatory compliance for new designs and production continuity.

Alternative Recommendation - SN74ALVCH16543DGGR (Texas Instruments): This part is suitable for applications operating at reduced supply voltages (1.65V ~ 3.6V). It maintains all functional parameters including 24mA output current, 3-state output capability, and identical package specifications. Active product status and ROHS3 compliance support ongoing availability. Implementation requires confirmation that system voltage requirements align with the 1.65V ~ 3.6V operating range.

Secondary Alternative - 74FCT162646CTPACT (Cypress Semiconductor Corp): This part provides parametric equivalence with 4.5V ~ 5.5V supply voltage operation and identical functional specifications. Active product status supports availability. Manufacturer sourcing differs from the original Texas Instruments design.

Obsolete Alternative - 74FCT162652CTPACT (Texas Instruments): This part maintains identical supply voltage and functional parameters but retains obsolete product status classification, limiting long-term availability for new production requirements.

Frequently Asked Questions (FAQ)

Q: Can 74ACT16543DGGR directly replace 74FCT162543ATPACT in existing designs?

A: Yes. Both parts operate at 4.5V ~ 5.5V supply voltage with identical logic type, element count, bit configuration, output current capability, and package specifications. The 74ACT16543DGGR holds active product status, providing superior long-term availability compared to the obsolete 74FCT162543ATPACT.

Q: What is the key difference between 74ACT16543DGGR and SN74ALVCH16543DGGR?

A: The primary difference is supply voltage range. The 74ACT16543DGGR operates at 4.5V ~ 5.5V, matching the original part's voltage specifications. The SN74ALVCH16543DGGR operates at reduced voltage (1.65V ~ 3.6V). All other functional parameters remain identical. Selection depends on system voltage requirements.

Q: Are all substitute parts available in the same 56-TFSOP package?

A: Yes. All listed substitute parts use the 56-TFSOP (0.240", 6.10mm Width) package, ensuring mechanical and electrical compatibility with existing PCB designs and socket configurations.

Q: Do all substitute parts meet RoHS3 compliance?

A: The 74ACT16543DGGR, 74FCT162652CTPACT, and SN74ALVCH16543DGGR are confirmed ROHS3 compliant. The 74FCT162646CTPACT RoHS status is not specified in available documentation.

Q: Which substitute part offers the best long-term availability?

A: The 74ACT16543DGGR is recommended for long-term availability due to active product status, Texas Instruments manufacturing, ROHS3 compliance, and unlimited moisture sensitivity rating. This combination supports both current production and future design requirements.

Q: Can SN74ALVCH16543DGGR be used in 5V systems?

A: No. The SN74ALVCH16543DGGR operates at 1.65V ~ 3.6V supply voltage and is not suitable for 5V systems. Use only in applications where system voltage requirements align with the specified 1.65V ~ 3.6V range.