CY74FCT16374CTPACT Equivalent & Substitute Parts

Part Overview

The CY74FCT16374CTPACT is a dual 8-bit D-type flip-flop logic integrated circuit manufactured by Texas Instruments in the 74FCT series. This device features tri-state, non-inverted outputs and operates on a 4.5V to 5.5V supply voltage with positive edge triggering. The part is classified as obsolete, making equivalent and substitute components necessary for ongoing system support and new designs requiring similar functionality.

Key Parameters

Parameter	Value
Manufacturer Part Number	CY74FCT16374CTPACT
Manufacturer	Texas Instruments
Series	74FCT
Function	D-Type Flip Flop, 2 Elements, 8 Bits per Element
Output Type	Tri-State, Non-Inverted
Package	48-TFSOP (0.240", 6.10mm Width)
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Trigger Type	Positive Edge
Current Output High/Low	32mA / 64mA
Quiescent Current	500 µA
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the CY74FCT16374CTPACT is determined by the following critical parameters:

Functional Equivalence: All substitute parts must be D-type flip-flops with 2 elements and 8 bits per element, tri-state non-inverted outputs, and positive edge triggering.

Package Compatibility: All substitutes use the 48-TFSOP (0.240", 6.10mm Width) surface mount package, ensuring mechanical and electrical pin compatibility.

Electrical Operating Range: Substitutes are grouped into two voltage classes: 5V-compatible devices (4.5V ~ 5.5V supply) and 3.3V-compatible devices (1.65V ~ 3.6V or 2V ~ 3.6V supply). Selection depends on system voltage requirements.

Performance Characteristics: Propagation delay, output current drive, and quiescent current vary across substitutes. These parameters determine suitability for specific timing and power consumption requirements.

Product Status and Availability: Active status substitutes provide long-term supply assurance, while obsolete alternatives may have limited inventory.

Parameter Comparison

Part Number	Manufacturer	Series	Voltage Supply	Output Type	Elements / Bits	Package	Operating Temp	Product Status	Iq (µA)
CY74FCT16374CTPACT	Texas Instruments	74FCT	4.5V ~ 5.5V	Tri-State, Non-Inverted	2 / 8	48-TFSOP	-40°C ~ 85°C	Obsolete	500
SN74LVC16374ADGGR	Texas Instruments	74LVC	1.65V ~ 3.6V	Tri-State, Non-Inverted	2 / 8	48-TFSOP	-40°C ~ 85°C	Active	20
74FCT162374ATPAG	Renesas Electronics	74FCT	4.5V ~ 5.5V	Tri-State, Non-Inverted	2 / 8	48-TFSOP	-40°C ~ 85°C	Obsolete	500
74FCT163374CPAG	IDT	74FCT	2.7V ~ 3.6V	Tri-State	2 / 8	48-TFSOP	-40°C ~ 85°C	Active	—
74FCT163374CPAG8	IDT	74FCT	2.7V ~ 3.6V	Tri-State	2 / 8	48-TFSOP	-40°C ~ 85°C	Active	—
74LCX162374MTDX	Fairchild Semiconductor	74LCX	2V ~ 3.6V	Tri-State, Non-Inverted	2 / 8	48-TFSOP	-40°C ~ 85°C	Active	20
74LCX16374MTDX	Fairchild Semiconductor	74LCX	2V ~ 3.6V	Tri-State, Non-Inverted	2 / 8	48-TFSOP	-40°C ~ 85°C	Active	20
M74LCX16374DTR2G	onsemi	74LCX	2V ~ 3.6V	Tri-State, Non-Inverted	2 / 8	48-TFSOP	-55°C ~ 125°C	Active	10
MC74LCX16374DTG	onsemi	74LCX	2V ~ 3.6V	Tri-State, Non-Inverted	2 / 8	48-TFSOP	-55°C ~ 125°C	Obsolete	10

Engineering Selection Recommendations

For 5V System Environments: The 74FCT162374ATPAG (Renesas Electronics) provides direct voltage compatibility with the original CY74FCT16374CTPACT, maintaining the 4.5V ~ 5.5V supply range. Both devices are obsolete; however, inventory availability differs. The 74FCT162374ATPAG shows 2,288 units in stock compared to 1,815 units for the original part.

For 3.3V System Environments: The SN74LVC16374ADGGR (Texas Instruments) is an active product offering long-term supply assurance. It operates on 1.65V ~ 3.6V, reducing quiescent current to 20 µA from the original 500 µA, providing significant power efficiency improvements. This device is recommended for new designs and systems transitioning to lower voltage operation.

For Extended Temperature Range Applications: The M74LCX16374DTR2G and MC74LCX16374DTG (onsemi) extend the operating temperature range to -55°C ~ 125°C, suitable for industrial and automotive environments. The M74LCX16374DTR2G maintains active product status with the lowest quiescent current at 10 µA.

For 3.3V with High Inventory Availability: The 74LCX162374MTDX (Fairchild Semiconductor) offers 39,240 units in stock, the highest inventory level among all substitutes, ensuring supply continuity for high-volume applications.

Compliance Considerations: All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, matching the original part's regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the SN74LVC16374ADGGR replace the CY74FCT16374CTPACT in a 5V system?

A: No. The SN74LVC16374ADGGR operates on 1.65V ~ 3.6V and is not rated for 5V operation. Direct substitution in a 5V system would exceed maximum ratings. For 5V systems, use the 74FCT162374ATPAG.

Q: What is the primary advantage of 74LCX series substitutes over the original 74FCT device?

A: The 74LCX series reduces quiescent current to 20 µA compared to 500 µA in the 74FCT, providing 25-fold power consumption reduction. Additionally, 74LCX devices operate at lower voltages (2V ~ 3.6V), making them suitable for modern low-power applications.

Q: Are all substitute parts pin-compatible with the CY74FCT16374CTPACT?

A: Yes. All listed substitutes use the 48-TFSOP package with identical pin assignments for D-type flip-flop functionality. Mechanical and electrical pin compatibility is maintained across all substitutes.

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

A: The SN74LVC16374ADGGR (Texas Instruments) and 74LCX162374MTDX (Fairchild Semiconductor) both carry active product status. The 74LCX162374MTDX shows the highest inventory at 39,240 units, providing superior supply assurance for high-volume requirements.

Q: Can I use the 74FCT163374CPAG in place of the CY74FCT16374CTPACT?

A: The 74FCT163374CPAG is functionally equivalent but operates on 2.7V ~ 3.6V, not 5V. It is suitable only for 3.3V systems. Verify system voltage requirements before substitution.

Q: What is the difference between 74LCX16374MTDX and 74LCX162374MTDX?

A: Both are functionally equivalent D-type flip-flops in the 74LCX series with identical electrical characteristics. The part number variation reflects different manufacturer designations. Both are suitable substitutes with active product status.

Q: Does the M74LCX16374DTR2G offer advantages over other 74LCX alternatives?

A: The M74LCX16374DTR2G extends the operating temperature range to -55°C ~ 125°C and reduces quiescent current to 10 µA, the lowest among all substitutes. It is optimal for industrial, automotive, and extreme temperature applications.

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