CY74FCT162543TPVC Equivalent & Substitute Parts

Part Overview

The CY74FCT162543TPVC is a non-inverting transceiver IC with 2 elements, 8 bits per element, and 3-state output capability in a 56-SSOP package. This component operates at 4.5V to 5.5V supply voltage with 24mA output current capability and supports operating temperatures from -40°C to 85°C. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring similar 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	24mA, 24mA
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

Substitution for the CY74FCT162543TPVC is determined by strict equivalence in the following 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
Operating Temperature: -40°C ~ 85°C (TA)
Package / Case: 56-BSSOP (0.295", 7.50mm Width)
Mounting Type: Surface Mount

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

Category 1: 4.5V ~ 5.5V Supply Voltage (Direct Functional Equivalents) Parts maintaining identical supply voltage specifications: 74ACT16543DL, 74ACT16646DL, 74ACT16651DL, 74ACT16652DL, CY74FCT162543CTPVC, CY74FCT162646ATPVC, CY74FCT162646CTPVC, CY74FCT162652ATPVC, CY74FCT162952BTPVC

Category 2: 1.65V ~ 3.6V Supply Voltage (Lower Voltage Alternative) Part with reduced supply voltage range but identical functional parameters: SN74ALVCH16543DLR

Parameter Comparison

Part Number	Manufacturer	Series	Voltage - Supply	Current - Output High, Low	Operating Temperature	Package / Case	Product Status	Packaging Type
CY74FCT162543TPVC	Texas Instruments	74FCT	4.5V ~ 5.5V	24mA, 24mA	-40°C ~ 85°C	56-BSSOP	Obsolete	-
SN74ALVCH16543DLR	Texas Instruments	74ALVCH	1.65V ~ 3.6V	24mA, 24mA	-40°C ~ 85°C	56-BSSOP	Active	Tape & Reel (TR)
74ACT16543DL	Texas Instruments	74ACT	4.5V ~ 5.5V	24mA, 24mA	-40°C ~ 85°C	56-BSSOP	Last Time Buy	Tube
74ACT16646DL	Texas Instruments	74ACT	4.5V ~ 5.5V	24mA, 24mA	-40°C ~ 85°C	56-BSSOP	Last Time Buy	Tube
74ACT16651DL	Texas Instruments	74ACT	4.5V ~ 5.5V	24mA, 24mA	-40°C ~ 85°C	56-BSSOP	Active	Tube
74ACT16652DL	Texas Instruments	74ACT	4.5V ~ 5.5V	24mA, 24mA	-40°C ~ 85°C	56-BSSOP	Last Time Buy	Tube
CY74FCT162543CTPVC	Texas Instruments	74FCT	4.5V ~ 5.5V	24mA, 24mA	-40°C ~ 85°C	56-BSSOP	Obsolete	Tube
CY74FCT162646ATPVC	Texas Instruments	74FCT	4.5V ~ 5.5V	24mA, 24mA	-40°C ~ 85°C	56-BSSOP	Obsolete	-
CY74FCT162646CTPVC	Texas Instruments	74FCT	4.5V ~ 5.5V	24mA, 24mA	-40°C ~ 85°C	56-BSSOP	Obsolete	-
CY74FCT162652ATPVC	Texas Instruments	74FCT	4.5V ~ 5.5V	24mA, 24mA	-40°C ~ 85°C	56-BSSOP	Obsolete	-
CY74FCT162952BTPVC	Texas Instruments	74FCT	4.5V ~ 5.5V	24mA, 24mA	-40°C ~ 85°C	56-BSSOP	Obsolete	Tube

Engineering Selection Recommendations

For designs currently using CY74FCT162543TPVC, the following selection criteria apply based on product status and compliance:

Primary Recommendation: 74ACT16651DL This part maintains full parametric equivalence with 4.5V ~ 5.5V supply voltage, identical output current specifications, and matching thermal operating range. Product status is Active, ensuring long-term availability and supply chain stability. RoHS3 compliance and MSL 1 rating match the original specification.

Secondary Recommendation: 74ACT16646DL Functionally equivalent with Active product status designation. Highest inventory availability (4802 pcs) among substitute options. Maintains all critical electrical and thermal parameters. Suitable for high-volume production requirements.

Alternative for Lower Voltage Systems: SN74ALVCH16543DLR If system design permits operation at 1.65V ~ 3.6V supply voltage, this part offers Active product status with identical functional parameters. Packaging as Tape & Reel (TR) supports automated assembly processes. Recommended only when voltage compatibility is confirmed.

Obsolete Series Alternatives: CY74FCT162543CTPVC, CY74FCT162646ATPVC, CY74FCT162646CTPVC, CY74FCT162652ATPVC, CY74FCT162952BTPVC These parts maintain identical electrical specifications and 4.5V ~ 5.5V supply voltage but carry Obsolete product status. Use only for legacy system maintenance or when inventory of Active alternatives is unavailable. All maintain RoHS3 compliance and MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can SN74ALVCH16543DLR replace CY74FCT162543TPVC in existing designs? A: SN74ALVCH16543DLR is functionally equivalent but operates at 1.65V ~ 3.6V supply voltage versus the original 4.5V ~ 5.5V. Substitution requires confirmation that system power supply and all connected circuitry support the lower voltage range. All other parameters including output current, temperature range, and package dimensions are identical.

Q: What is the difference between 74ACT16543DL and 74ACT16646DL? A: Both parts are parametrically equivalent with identical supply voltage (4.5V ~ 5.5V), output current (24mA, 24mA), operating temperature (-40°C ~ 85°C), and package specifications (56-BSSOP). Selection between these parts depends on inventory availability and packaging preference (both supplied in Tube format).

Q: Why are some substitute parts listed as Obsolete? A: CY74FCT162543CTPVC, CY74FCT162646ATPVC, CY74FCT162646CTPVC, CY74FCT162652ATPVC, and CY74FCT162952BTPVC maintain identical electrical specifications to the original part but have reached end-of-life status. These are suitable for legacy system support only. For new designs, select from Active status parts: 74ACT16651DL, 74ACT16646DL, or SN74ALVCH16543DLR.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain RoHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), matching the original CY74FCT162543TPVC specification.

Q: What packaging options are available for substitute parts? A: Substitute parts are supplied in three packaging formats: Tube (74ACT16543DL, 74ACT16646DL, 74ACT16651DL, 74ACT16652DL, CY74FCT162952BTPVC), Tape & Reel (SN74ALVCH16543DLR), and unspecified packaging (-) for certain CY74FCT series parts. Packaging selection should align with assembly process requirements.

Q: Is the 56-BSSOP package identical across all substitute parts? A: Yes. All substitute parts use the 56-BSSOP package with 0.295" width and 7.50mm height, ensuring mechanical compatibility with existing PCB layouts and socket designs.

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