74FCT16543ATPACTG4 Equivalent & Substitute Parts

Part Overview

The 74FCT16543ATPACTG4 is a non-inverting transceiver IC manufactured by Texas Instruments, featuring 2 elements with 8 bits per element and 3-state output capability. This 56-TSSOP surface mount device operates across a 4.5V to 5.5V supply range and is designed for high-speed logic applications requiring bidirectional data transmission with output control.

The 74FCT16543ATPACTG4 is currently discontinued at DiGi Electronics. Equivalent substitute parts are available to maintain design continuity and ensure project completion without redesign requirements.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Logic Type	Transceiver, Non-Inverting
Number of Elements	2
Number of Bits per Element	8
Output Type	3-State
Current - Output High, Low	32mA, 64mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	56-TFSOP (0.240", 6.10mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74FCT16543ATPACTG4 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: 32mA, 64mA
Voltage - Supply: 4.5V ~ 5.5V
Operating Temperature: -40°C ~ 85°C (TA)
Package / Case: 56-TFSOP (0.240", 6.10mm Width)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed below meet these exact specifications and are therefore direct functional equivalents suitable for replacement in applications currently using the 74FCT16543ATPACTG4.

Parameter Comparison

Part Number	Manufacturer	Series	Logic Type	Elements / Bits	Output Type	Current (High/Low)	Voltage Supply	Temp Range	Package	Product Status	Inventory
74FCT16543ATPACTG4	Texas Instruments	74FCT	Transceiver, Non-Inverting	2 / 8	3-State	32mA / 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	56-TFSOP	Discontinued	991 Pcs
CY74FCT16543ATPACT	Texas Instruments	74FCT	Transceiver, Non-Inverting	2 / 8	3-State	32mA / 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	56-TFSOP	Obsolete	3300 Pcs
CY74FCT16952CTPACT	Texas Instruments	74FCT	Transceiver, Non-Inverting	2 / 8	3-State	32mA / 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	56-TFSOP	Obsolete	912 Pcs
SN74ABT16470DGGR	Texas Instruments	74ABT	Transceiver, Non-Inverting	2 / 8	3-State	32mA / 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	56-TFSOP	Active	623 Pcs
SN74ABT16543DGGR	Texas Instruments	74ABT	Transceiver, Non-Inverting	2 / 8	3-State	32mA / 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	56-TFSOP	Active	2000 Pcs
SN74ABT16646DGGR	Texas Instruments	74ABT	Transceiver, Non-Inverting	2 / 8	3-State	32mA / 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	56-TFSOP	Active	700 Pcs
SN74ABT16952DGGR	Texas Instruments	74ABT	Transceiver, Non-Inverting	2 / 8	3-State	32mA / 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	56-TFSOP	Active	836 Pcs

Engineering Selection Recommendations

All listed substitute parts are parametrically equivalent to the 74FCT16543ATPACTG4 and meet identical electrical and mechanical specifications. Selection among available substitutes should be based on the following factors:

Product Status Consideration: The 74ABT series parts (SN74ABT16470DGGR, SN74ABT16543DGGR, SN74ABT16646DGGR, SN74ABT16952DGGR) maintain Active product status with Texas Instruments, ensuring long-term availability and continued manufacturing support. The 74FCT series alternatives (CY74FCT16543ATPACT, CY74FCT16952CTPACT) are classified as Obsolete, indicating limited future availability.

Compliance and Certification: All substitute parts carry ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental qualifications.

Inventory Availability: SN74ABT16543DGGR offers the highest inventory level at 2000 pieces, followed by CY74FCT16543ATPACT at 3300 pieces. For applications requiring immediate procurement, inventory status should be verified with current suppliers.

Packaging Format: Substitute parts are available in Cut Tape (CT) and Tape & Reel (TR) formats. Selection should align with assembly process requirements and volume specifications.

Frequently Asked Questions (FAQ)

Q: Can I directly replace the 74FCT16543ATPACTG4 with any of the listed substitute parts?

A: Yes. All listed parts are parametrically equivalent across logic type, element count, bit width, output configuration, current ratings, voltage supply range, operating temperature, package type, and compliance certifications. Direct substitution is supported without circuit modification.

Q: What is the difference between the 74FCT and 74ABT series substitutes?

A: Both series meet identical electrical and mechanical specifications for this application. The primary distinction is product lifecycle status: 74ABT parts are Active with ongoing manufacturing support, while 74FCT parts are Obsolete. For new designs or long-term production, 74ABT series selection is recommended.

Q: Are there any compatibility concerns with the 56-TFSOP package across all substitutes?

A: No. All substitute parts use the identical 56-TFSOP (0.240", 6.10mm Width) surface mount package. PCB footprints, solder reflow profiles, and assembly processes remain unchanged.

Q: Do all substitutes maintain the same current output specifications?

A: Yes. All substitute parts deliver 32mA output high current and 64mA output low current, matching the original 74FCT16543ATPACTG4 specifications.

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

A: SN74ABT16543DGGR is recommended for long-term projects due to its Active product status with Texas Instruments, ensuring continued manufacturing and supply chain stability.

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