CD74HCT374E-NG Equivalent & Substitute Parts

Part Overview

The CD74HCT374E-NG is an active-status D-type flip-flop logic integrated circuit manufactured by Texas Instruments. This 8-bit parallel latch operates as a standard logic component in the 74HCT series, featuring tri-state non-inverted outputs and positive edge triggering. The device is housed in a 20-DIP through-hole package and is ROHS3 compliant. Substitute parts are identified based on matching electrical specifications, functional characteristics, and physical packaging requirements to ensure direct circuit compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD74HCT374E-NG
Manufacturer	Texas Instruments
Category	Logic
Series	74HCT
Type	D-Type Flip Flop
Number of Elements	1
Number of Bits per Element	8
Output Type	Tri-State, Non-Inverted
Clock Frequency	60 MHz
Max Propagation Delay @ V, Max CL	33ns @ 4.5V, 50pF
Trigger Type	Positive Edge
Current - Output High, Low	6mA, 6mA
Voltage - Supply	4.5V ~ 5.5V
Current - Quiescent (Iq)	8 µA
Input Capacitance	10 pF
Operating Temperature	-55°C ~ 125°C (TA)
Mounting Type	Through Hole
Package / Case	20-DIP (0.300", 7.62mm)
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the CD74HCT374E-NG are identified based on the following critical parameters that determine functional and physical compatibility:

Electrical Equivalence Criteria:

D-Type flip-flop architecture with 8-bit configuration
Tri-state, non-inverted output type
Positive edge trigger mechanism
60 MHz clock frequency specification
33ns maximum propagation delay @ 4.5V, 50pF load
4.5V to 5.5V supply voltage range
6mA output current capability (high and low)
8 µA quiescent current

Physical Compatibility Criteria:

20-DIP through-hole package (0.300", 7.62mm)
Texas Instruments 74HCT series

Compliance Criteria:

Active product status
ROHS3 compliance
REACH unaffected status

All identified substitute parts match these parameters without exception.

Parameter Comparison

Parameter	CD74HCT374E-NG	CD74HCT374E	CD74HCT574E
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Series	74HCT	74HCT	74HCT
Type	D-Type Flip Flop	D-Type Flip Flop	D-Type Flip Flop
Number of Bits per Element	8	8	8
Output Type	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted
Clock Frequency	60 MHz	60 MHz	60 MHz
Max Propagation Delay @ V, Max CL	33ns @ 4.5V, 50pF	33ns @ 4.5V, 50pF	33ns @ 4.5V, 50pF
Trigger Type	Positive Edge	Positive Edge	Positive Edge
Current - Output High, Low	6mA, 6mA	6mA, 6mA	6mA, 6mA
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Current - Quiescent (Iq)	8 µA	8 µA	8 µA
Input Capacitance	10 pF	10 pF	10 pF
Operating Temperature	-55°C ~ 125°C (TA)	-55°C ~ 125°C (TA)	-55°C ~ 125°C (TA)
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	20-DIP (0.300", 7.62mm)	20-DIP (0.300", 7.62mm)	20-DIP (0.300", 7.62mm)
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Both CD74HCT374E and CD74HCT574E are direct parametric equivalents to the CD74HCT374E-NG. Selection between these parts is based on the following factors:

Product Status: All three parts maintain active status with Texas Instruments, ensuring continued availability and technical support.

Compliance Certification: All parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for industrial and commercial applications.

Packaging Consideration: The primary difference between CD74HCT374E-NG and CD74HCT374E is packaging format. The -NG variant specifies DIP packaging, while CD74HCT374E is supplied in tube packaging. Both maintain identical 20-DIP physical dimensions and pin configuration.

Inventory Availability: CD74HCT374E offers higher stock levels (6269 units) compared to CD74HCT374E-NG (1048 units) and CD74HCT574E (1272 units), which may influence procurement decisions for high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT374E replace CD74HCT374E-NG in existing designs?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, functional characteristics, and 20-DIP package dimensions. The difference is packaging format (tube versus DIP packaging), which does not affect circuit performance or pin compatibility.

Q: What is the functional difference between CD74HCT374E and CD74HCT574E?

A: Both parts are D-type flip-flops with 8-bit configuration, tri-state non-inverted outputs, and identical electrical parameters. The base product numbers (74HCT374 versus 74HCT574) indicate different internal latch configurations, but both meet the specified electrical and timing requirements for this application.

Q: Are all three parts suitable for -55°C to 125°C operating temperature applications?

A: Yes. All three parts specify identical operating temperature ranges of -55°C to 125°C (TA), making them suitable for industrial and extended-temperature applications.

Q: Does packaging format affect circuit performance?

A: No. Packaging format (tube, DIP, or other formats) does not affect electrical performance, timing characteristics, or pin configuration. Selection should be based on procurement and assembly requirements.

Q: Are these parts suitable for new designs?

A: Yes. All three parts maintain active product status with Texas Instruments, indicating continued support and availability for new design implementations.

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