CY74FCT162646CTPVC Equivalent & Substitute Parts

Part Overview

The CY74FCT162646CTPVC 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 surface mount package. The device operates across a 4.5V to 5.5V supply voltage range and is rated for -40°C to 85°C operating temperature.

This part carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support long-term product support for legacy systems utilizing this component.

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

Substitute parts for the CY74FCT162646CTPVC are classified based on strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

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
Package / Case: 56-BSSOP (0.295", 7.50mm Width)
Mounting Type: Surface Mount
Operating Temperature: -40°C ~ 85°C (TA)
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Voltage Supply Compatibility: Substitutes are grouped into two categories based on supply voltage range:

5.5V Series (4.5V ~ 5.5V): Direct electrical equivalents maintaining identical voltage specifications. Includes 74ACT and 74FCT series parts.
Low Voltage Series (1.65V ~ 3.6V): SN74LVC16646ADLR operates at reduced voltage but maintains all functional and mechanical parameters, suitable for applications where lower supply voltage is acceptable.

All substitute parts maintain identical package geometry, pin count, functional logic configuration, and thermal operating range.

Parameter Comparison

Part Number	Manufacturer	Series	Voltage - Supply	Product Status	Current - Output (mA)	Package	RoHS Status
CY74FCT162646CTPVC	Texas Instruments	74FCT	4.5V ~ 5.5V	Obsolete	24, 24	56-BSSOP	ROHS3 Compliant
SN74LVC16646ADLR	Texas Instruments	74LVC	1.65V ~ 3.6V	Active	24, 24	56-BSSOP	ROHS3 Compliant
74ACT16652DL	Texas Instruments	74ACT	4.5V ~ 5.5V	Last Time Buy	24, 24	56-BSSOP	ROHS3 Compliant
74ACT16543DL	Texas Instruments	74ACT	4.5V ~ 5.5V	Last Time Buy	24, 24	56-BSSOP	ROHS3 Compliant
74ACT16646DL	Texas Instruments	74ACT	4.5V ~ 5.5V	Last Time Buy	24, 24	56-BSSOP	ROHS3 Compliant
74ACT16651DL	Texas Instruments	74ACT	4.5V ~ 5.5V	Active	24, 24	56-BSSOP	ROHS3 Compliant
CY74FCT162543CTPVC	Texas Instruments	74FCT	4.5V ~ 5.5V	Obsolete	24, 24	56-BSSOP	ROHS3 Compliant
CY74FCT162543TPVC	Texas Instruments	74FCT	4.5V ~ 5.5V	Obsolete	24, 24	56-BSSOP	ROHS3 Compliant
CY74FCT162646ATPVC	Texas Instruments	74FCT	4.5V ~ 5.5V	Obsolete	24, 24	56-BSSOP	ROHS3 Compliant
CY74FCT162652ATPVC	Texas Instruments	74FCT	4.5V ~ 5.5V	Obsolete	24, 24	56-BSSOP	ROHS3 Compliant
CY74FCT162952BTPVC	Texas Instruments	74FCT	4.5V ~ 5.5V	Obsolete	24, 24	56-BSSOP	ROHS3 Compliant

Engineering Selection Recommendations

For 4.5V ~ 5.5V Supply Voltage Applications:

74ACT16651DL is the preferred substitute. This part maintains full electrical and mechanical compatibility with the CY74FCT162646CTPVC while offering Active product status, ensuring continued manufacturer support and long-term availability.

74ACT16646DL and 74ACT16543DL are alternative 4.5V ~ 5.5V substitutes with Last Time Buy status. These parts provide equivalent functionality but with limited future availability.

For Reduced Supply Voltage Applications (1.65V ~ 3.6V):

SN74LVC16646ADLR is the MFR-recommended substitute for applications requiring lower supply voltage operation. This part maintains all functional parameters and package specifications while extending voltage compatibility to lower supply ranges. Active product status ensures ongoing availability.

For Legacy System Continuity:

CY74FCT162646ATPVC, CY74FCT162543CTPVC, CY74FCT162652ATPVC, and CY74FCT162952BTPVC are parametric equivalents within the 74FCT series. All carry Obsolete status and should be considered only when existing inventory is available or when design-specific requirements mandate 74FCT series selection.

All recommended substitutes maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with modern manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74LVC16646ADLR be used as a direct replacement for CY74FCT162646CTPVC?

A: SN74LVC16646ADLR is functionally equivalent in logic configuration, element count, bit width, output type, current ratings, package geometry, and thermal range. The primary difference is supply voltage: SN74LVC16646ADLR operates at 1.65V ~ 3.6V versus the CY74FCT162646CTPVC at 4.5V ~ 5.5V. Direct substitution is possible only if the application circuit can operate at the lower voltage range.

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

A: Both 74ACT and 74FCT series maintain identical electrical specifications for the CY74FCT162646CTPVC substitution parameters: 4.5V ~ 5.5V supply, 24mA output current, 56-BSSOP package, and -40°C ~ 85°C operating temperature. The primary distinction is product lifecycle status: 74ACT parts are in Last Time Buy or Active status, while 74FCT equivalents are Obsolete.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts utilize the 56-BSSOP (0.295", 7.50mm Width) surface mount package, ensuring mechanical and electrical compatibility with existing PCB designs. Packaging format variations (Tube, Tape & Reel) do not affect functional performance or pin configuration.

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

A: 74ACT16651DL carries Active product status, indicating ongoing manufacturer support and production. This part is the optimal choice for new designs or applications requiring extended component lifecycle assurance.

Q: Do all substitutes maintain RoHS3 compliance?

A: All listed substitute parts are ROHS3 compliant with MSL Level 1 rating, meeting current environmental and manufacturing standards. This ensures compatibility with modern assembly processes and regulatory requirements.

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