CY74FCT162543CTPVC Equivalent & Substitute Parts

Part Overview

The CY74FCT162543CTPVC is a non-inverting transceiver logic IC manufactured by Texas Instruments, configured as a 2-element, 8-bit per element device with 3-state output capability in a 56-SSOP package. This part operates across a 4.5V to 5.5V supply voltage range and is rated for -40°C to 85°C operating temperature. The device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

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)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the CY74FCT162543CTPVC is determined by strict equivalence across the following critical parameters:

Logic type: Transceiver, Non-Inverting
Element and bit configuration: 2 elements, 8 bits per element
Output configuration: 3-State
Output current capability: 24mA high and low
Package type: 56-BSSOP
Moisture sensitivity: MSL 1
RoHS compliance: ROHS3 Compliant

Substitute parts are grouped into two categories:

MFR Recommended Substitute: SN74ALVCH16543DLR operates at a reduced voltage range (1.65V ~ 3.6V) while maintaining identical logic configuration, element count, bit width, output type, and current specifications. This part is active status and represents the preferred modern alternative.

Parametric Equivalents: Parts including 74ACT16543DL, 74ACT16646DL, 74ACT16651DL, 74ACT16652DL, CY74FCT162543TPVC, CY74FCT162646ATPVC, CY74FCT162646CTPVC, CY74FCT162652ATPVC, and CY74FCT162952BTPVC maintain identical voltage supply range (4.5V ~ 5.5V), logic configuration, and all electrical specifications. These parts differ in series designation (74ACT vs. 74FCT) and product status but are electrically interchangeable within the 5.5V supply domain.

Parameter Comparison

Part Number	Manufacturer	Series	Logic Type	Elements / Bits	Output Type	Current (mA)	Voltage Supply	Temp Range	Package	Status	RoHS
CY74FCT162543CTPVC	Texas Instruments	74FCT	Transceiver, Non-Inverting	2 / 8	3-State	24 / 24	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	Obsolete	ROHS3
SN74ALVCH16543DLR	Texas Instruments	74ALVCH	Transceiver, Non-Inverting	2 / 8	3-State	24 / 24	1.65V ~ 3.6V	-40°C ~ 85°C	56-BSSOP	Active	ROHS3
74ACT16543DL	Texas Instruments	74ACT	Transceiver, Non-Inverting	2 / 8	3-State	24 / 24	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	Last Time Buy	ROHS3
74ACT16646DL	Texas Instruments	74ACT	Transceiver, Non-Inverting	2 / 8	3-State	24 / 24	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	Last Time Buy	ROHS3
74ACT16651DL	Texas Instruments	74ACT	Transceiver, Non-Inverting	2 / 8	3-State	24 / 24	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	Active	ROHS3
74ACT16652DL	Texas Instruments	74ACT	Transceiver, Non-Inverting	2 / 8	3-State	24 / 24	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	Last Time Buy	ROHS3
CY74FCT162543TPVC	Texas Instruments	74FCT	Transceiver, Non-Inverting	2 / 8	3-State	24 / 24	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	Obsolete	ROHS3
CY74FCT162646ATPVC	Texas Instruments	74FCT	Transceiver, Non-Inverting	2 / 8	3-State	24 / 24	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	Obsolete	ROHS3
CY74FCT162646CTPVC	Texas Instruments	74FCT	Transceiver, Non-Inverting	2 / 8	3-State	24 / 24	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	Obsolete	ROHS3
CY74FCT162652ATPVC	Texas Instruments	74FCT	Transceiver, Non-Inverting	2 / 8	3-State	24 / 24	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	Obsolete	ROHS3
CY74FCT162952BTPVC	Texas Instruments	74FCT	Transceiver, Non-Inverting	2 / 8	3-State	24 / 24	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	Obsolete	ROHS3

Engineering Selection Recommendations

For systems currently using CY74FCT162543CTPVC, the following selection criteria apply based on product status and compliance:

Active Status Priority: 74ACT16651DL is the only parametric equivalent with active product status and identical 4.5V ~ 5.5V supply range. This part is recommended for new designs requiring 5.5V operation and long-term availability assurance.

Modern Alternative with Reduced Voltage: SN74ALVCH16543DLR is the manufacturer-recommended substitute with active status. This part operates at 1.65V ~ 3.6V and is suitable for systems designed for lower voltage operation. All electrical specifications (logic type, element count, bit width, output type, current capability) remain identical. This part is preferred for new designs where voltage compatibility exists.

Last Time Buy Alternatives: 74ACT16543DL, 74ACT16646DL, and 74ACT16652DL maintain identical electrical specifications and 4.5V ~ 5.5V operation but carry Last Time Buy status, indicating limited future availability. These are suitable for legacy system maintenance only.

Obsolete Series Equivalents: CY74FCT162543TPVC, CY74FCT162646ATPVC, CY74FCT162646CTPVC, CY74FCT162652ATPVC, and CY74FCT162952BTPVC are all obsolete status parts within the 74FCT series. These provide electrical equivalence but offer no advantage over active alternatives and should not be selected for new applications.

All substitute parts maintain ROHS3 compliance and MSL 1 rating, ensuring environmental and moisture handling compatibility with the original part.

Frequently Asked Questions (FAQ)

Q: Can SN74ALVCH16543DLR replace CY74FCT162543CTPVC in existing designs?

A: SN74ALVCH16543DLR is electrically equivalent in logic function, element configuration, bit width, output type, and current capability. However, it operates at 1.65V ~ 3.6V versus the original 4.5V ~ 5.5V. Direct substitution is only valid if the system power supply is compatible with the lower voltage range. No circuit modifications are required if voltage compatibility exists.

Q: What is the difference between 74ACT and 74FCT series parts?

A: Both series provide identical logic function, electrical specifications, and package configuration for this application. The series designation reflects internal design architecture. For the CY74FCT162543CTPVC, 74ACT equivalents (74ACT16543DL, 74ACT16646DL, 74ACT16651DL, 74ACT16652DL) are functionally interchangeable within the 4.5V ~ 5.5V supply domain.

Q: Why are some substitute parts marked as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production and will not accept new orders. While these parts may be electrically equivalent, they represent end-of-life products. Active or Last Time Buy alternatives should be prioritized for new designs and long-term system support.

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

A: All listed substitute parts use the 56-BSSOP package with identical 0.295" width and 7.50mm dimensions. Pin-to-pin compatibility is maintained across all substitutes, allowing direct PCB replacement without layout modifications.

Q: What compliance certifications apply to substitute parts?

A: All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original CY74FCT162543CTPVC. REACH status is unaffected for all parts, and ECCN classification remains EAR99 across the substitution group.

Q: Which substitute should be selected for new product designs?

A: For new designs requiring 4.5V ~ 5.5V operation, 74ACT16651DL is recommended due to active product status and guaranteed long-term availability. For designs compatible with 1.65V ~ 3.6V operation, SN74ALVCH16543DLR is the manufacturer-recommended modern alternative with active status.

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