CY74FCT16543TPVC Equivalent & Substitute Parts

Part Overview

The CY74FCT16543TPVC is a non-inverting transceiver IC with 2 elements, 8 bits per element, and 3-state output capability in a 56-SSOP package. This part is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term product availability for applications requiring this transceiver functionality.

Key Parameters

Parameter	Value
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-BSSOP (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the CY74FCT16543TPVC are grouped based on strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Substitution:

Logic Type: Transceiver, Non-Inverting
Number of Elements: 2
Number of Bits per Element: 8
Output Type: 3-State
Package / Case: 56-BSSOP (0.295", 7.50mm Width)
Operating Temperature Range: -40°C ~ 85°C (TA)
Mounting Type: Surface Mount

Substitution Categories:

Category 1: Parametric Equivalents (Identical Electrical Specifications) Parts matching all electrical parameters including voltage supply (4.5V ~ 5.5V), output current (32mA, 64mA), and operating temperature range. These include CY74FCT16543CTPVC, CY74FCT16652ATPVC, CY74FCT16652CTPVC, CY74FCT16646ATPVC, CY74FCT16646CTPVC, and CY74FCT16952ATPVC.

Category 2: Active Series Equivalents (Identical Electrical Specifications, Active Status) Parts from the 74ABT series maintaining identical electrical parameters with active product status: SN74ABT16470DL, SN74ABT16543DL, and SN74ABT16646DL.

Category 3: Voltage-Reduced Alternative (Lower Voltage Supply Range) SN74LVCH16543ADLR operates at 1.65V ~ 3.6V supply voltage with reduced output current (24mA, 24mA) but maintains identical logic type, element count, bit configuration, output type, package, and operating temperature range. This part is suitable only for applications where the lower voltage supply is compatible with system requirements.

Parameter Comparison

Part Number	Series	Voltage - Supply	Current - Output High, Low	Product Status	Packaging	Inventory (Pcs)
CY74FCT16543TPVC	74FCT	4.5V ~ 5.5V	32mA, 64mA	Obsolete	Tube	838
CY74FCT16543CTPVC	74FCT	4.5V ~ 5.5V	32mA, 64mA	Obsolete	Tube	1310
CY74FCT16652ATPVC	74FCT	4.5V ~ 5.5V	32mA, 64mA	Obsolete	Tube	2144
CY74FCT16652CTPVC	74FCT	4.5V ~ 5.5V	32mA, 64mA	Obsolete	Tube	1250
CY74FCT16646ATPVC	74FCT	4.5V ~ 5.5V	32mA, 64mA	Obsolete	Tube	863
CY74FCT16646CTPVC	74FCT	4.5V ~ 5.5V	32mA, 64mA	Obsolete	Tube	827
CY74FCT16952ATPVC	74FCT	4.5V ~ 5.5V	32mA, 64mA	Obsolete	Tube	1364
SN74ABT16470DL	74ABT	4.5V ~ 5.5V	32mA, 64mA	Active	Tube	1027
SN74ABT16543DL	74ABT	4.5V ~ 5.5V	32mA, 64mA	Active	Tube	1900
SN74ABT16646DL	74ABT	4.5V ~ 5.5V	32mA, 64mA	Active	Tube	3080
SN74LVCH16543ADLR	74LVCH	1.65V ~ 3.6V	24mA, 24mA	Active	Tape & Reel (TR)	969

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): Select from the 74ABT series parts (SN74ABT16470DL, SN74ABT16543DL, SN74ABT16646DL) when available. These parts maintain identical voltage supply range (4.5V ~ 5.5V), output current specifications (32mA, 64mA), and operating temperature range (-40°C ~ 85°C) while offering active product status. All parts are ROHS3 compliant with MSL 1 rating.

For Parametric Equivalents (Same Electrical Specifications, Obsolete Status): CY74FCT16543CTPVC, CY74FCT16652ATPVC, CY74FCT16652CTPVC, CY74FCT16646ATPVC, CY74FCT16646CTPVC, and CY74FCT16952ATPVC provide identical electrical performance and are suitable for applications where obsolete part status is acceptable. All maintain ROHS3 compliance and MSL 1 rating.

For Voltage-Reduced Applications Only: SN74LVCH16543ADLR is suitable only when system design permits operation at reduced voltage supply (1.65V ~ 3.6V) and reduced output current (24mA, 24mA). This part is active status and ROHS3 compliant but is not a direct replacement for standard 5V applications.

Frequently Asked Questions (FAQ)

Q: Can CY74FCT16543CTPVC be used as a direct replacement for CY74FCT16543TPVC? A: Yes. Both parts share identical electrical specifications: 4.5V ~ 5.5V supply voltage, 32mA/64mA output current, 2 elements with 8 bits per element, 3-state output, 56-BSSOP package, and -40°C ~ 85°C operating temperature. The difference is packaging format (Tube vs. Tube) and inventory availability.

Q: Why is SN74LVCH16543ADLR listed as a substitute if it has different voltage and current specifications? A: SN74LVCH16543ADLR is listed as a voltage-reduced alternative for applications where lower supply voltage (1.65V ~ 3.6V) is compatible with system design. It maintains identical logic type, element count, bit configuration, output type, package, and operating temperature range. It is not suitable for standard 5V applications.

Q: What is the advantage of selecting 74ABT series parts over 74FCT series? A: The 74ABT series parts (SN74ABT16470DL, SN74ABT16543DL, SN74ABT16646DL) maintain identical electrical specifications while offering active product status, ensuring long-term availability and continued manufacturer support. The 74FCT series is obsolete.

Q: Are all substitute parts available in the same package? A: All parts listed use the 56-BSSOP (0.295", 7.50mm Width) package for surface mount applications. Packaging format (Tube vs. Tape & Reel) varies by part number. Verify packaging requirements for your procurement process.

Q: Do all parts meet the same compliance standards? A: Yes. All listed parts are ROHS3 compliant, REACH unaffected, with MSL 1 (Unlimited) moisture sensitivity level, and ECCN EAR99 classification.

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