CY74FCT162646ATPVC Equivalent & Substitute Parts

Part Overview

The CY74FCT162646ATPVC 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 production requirements for systems utilizing this transceiver configuration.

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)
Mounting Type	Surface Mount
Package / Case	56-BSSOP (0.295", 7.50mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the CY74FCT162646ATPVC are grouped based on strict electrical and mechanical parameter compatibility:

Primary Substitution Criteria:

Logic Type: Transceiver, Non-Inverting (required match)
Number of Elements: 2 (required match)
Number of Bits per Element: 8 (required match)
Output Type: 3-State (required match)
Current - Output High, Low: 24mA, 24mA (required match)
Package / Case: 56-BSSOP (0.295", 7.50mm Width) (required match)
Mounting Type: Surface Mount (required match)
RoHS Status: ROHS3 Compliant (required match)
Moisture Sensitivity Level: 1 (Unlimited) (required match)

Voltage Supply Variation: Substitutes are divided into two categories based on supply voltage range:

4.5V ~ 5.5V (direct voltage compatibility with CY74FCT162646ATPVC)
1.65V ~ 3.6V (lower voltage operation, suitable for designs with reduced supply requirements)

All substitute parts maintain identical functional specifications, package dimensions, and compliance certifications as the main part.

Parameter Comparison

Part Number	Manufacturer	Series	Voltage - Supply	Product Status	Packaging	Inventory (Pcs)
CY74FCT162646ATPVC	Texas Instruments	74FCT	4.5V ~ 5.5V	Obsolete	-	1202
SN74LVC16646ADLR	Texas Instruments	74LVC	1.65V ~ 3.6V	Active	Tape & Reel (TR)	717
74ACT16652DL	Texas Instruments	74ACT	4.5V ~ 5.5V	Last Time Buy	Tube	1048
74ACT16543DL	Texas Instruments	74ACT	4.5V ~ 5.5V	Last Time Buy	Tube	1332
74ACT16646DL	Texas Instruments	74ACT	4.5V ~ 5.5V	Last Time Buy	Tube	4802
74ACT16651DL	Texas Instruments	74ACT	4.5V ~ 5.5V	Active	Tube	1048
CY74FCT162543CTPVC	Texas Instruments	74FCT	4.5V ~ 5.5V	Obsolete	Tube	821
CY74FCT162543TPVC	Texas Instruments	74FCT	4.5V ~ 5.5V	Obsolete	-	839
CY74FCT162646CTPVC	Texas Instruments	74FCT	4.5V ~ 5.5V	Obsolete	-	1247
CY74FCT162652ATPVC	Texas Instruments	74FCT	4.5V ~ 5.5V	Obsolete	-	1095
CY74FCT162952BTPVC	Texas Instruments	74FCT	4.5V ~ 5.5V	Obsolete	Tube	1103

Engineering Selection Recommendations

For Direct Replacement (4.5V ~ 5.5V Supply Systems):

The 74ACT series parts (74ACT16646DL, 74ACT16651DL, 74ACT16543DL, 74ACT16652DL) provide the most suitable substitution path. These parts maintain identical electrical specifications and package configuration while offering improved product status. The 74ACT16646DL offers the highest inventory availability (4802 pcs) and is classified as Last Time Buy, providing extended procurement windows. The 74ACT16651DL is the only 74ACT variant with Active product status, ensuring long-term availability and manufacturing support.

For Lower Voltage Applications (1.65V ~ 3.6V Supply Systems):

The SN74LVC16646ADLR represents the only substitute option for designs operating at reduced supply voltages. This part maintains all functional and package specifications while supporting lower voltage operation. Its Active product status ensures continued manufacturing and supply chain support. The Tape & Reel packaging format provides automated assembly compatibility.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited) moisture sensitivity rating, and identical REACH and ECCN classifications as the main part, ensuring regulatory and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can I use SN74LVC16646ADLR as a direct replacement for CY74FCT162646ATPVC?

A: SN74LVC16646ADLR is functionally equivalent but operates at a different supply voltage range (1.65V ~ 3.6V versus 4.5V ~ 5.5V). Use this part only if your system design supports lower voltage operation. For 4.5V ~ 5.5V systems, select from the 74ACT series substitutes.

Q: What is the difference between 74ACT16646DL and 74ACT16651DL?

A: Both parts are parametrically equivalent with identical electrical specifications and package configuration. The primary difference is product status: 74ACT16646DL is Last Time Buy with higher inventory (4802 pcs), while 74ACT16651DL is Active with lower inventory (1048 pcs). For new designs, 74ACT16651DL is recommended due to Active status.

Q: Are the obsolete 74FCT variants (CY74FCT162543CTPVC, CY74FCT162646CTPVC, CY74FCT162652ATPVC) suitable substitutes?

A: These parts meet all electrical and mechanical specifications but carry Obsolete product status. They should be considered only when 74ACT series parts are unavailable. Prioritize Active or Last Time Buy status parts for production designs.

Q: Does packaging format affect electrical performance?

A: No. Tube and Tape & Reel packaging formats do not affect electrical performance or functional specifications. Packaging selection depends on assembly process requirements and handling procedures.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and identical REACH/ECCN classifications as the main part, ensuring regulatory continuity across supply chain transitions.

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