CD74HCT574ME4 Equivalent & Substitute Parts

Part Overview

The CD74HCT574ME4 is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit positive edge triggering in a 20-SOIC surface mount package. This part is designated as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring this logic function.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD74HCT574ME4
Manufacturer	Texas Instruments
Base Product Number	74HCT574
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	33ns @ 4.5V, 50pF
Voltage Supply Range	4.5V ~ 5.5V
Current - Output High/Low	6mA / 6mA
Quiescent Current (Iq)	8 µA
Input Capacitance	10 pF
Operating Temperature Range	-55°C ~ 125°C
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitute parts for the CD74HCT574ME4 are classified based on strict adherence to the following critical parameters:

Primary Substitution Criteria:

Base product number: 74HCT574
Function: Standard D-Type flip-flop, 1 element, 8-bit
Output type: Tri-State, Non-Inverted
Trigger type: Positive Edge
Package: 20-SOIC (0.295", 7.50mm Width)
Voltage supply range: 4.5V ~ 5.5V
Mounting type: Surface Mount

Secondary Compatibility Parameters:

Clock frequency: 60 MHz minimum (or higher)
Max propagation delay: 33ns @ 4.5V, 50pF (or faster)
Current output capability: 6mA minimum (high and low)
Quiescent current: 8 µA maximum
Input capacitance: 10 pF nominal
Operating temperature: -55°C ~ 125°C (or compatible range)

Substitute parts are grouped into two categories: MFR Recommended (direct manufacturer equivalents) and Parametric Equivalent (functionally compatible alternatives). All listed substitutes maintain the core 74HCT574 logic function and package specification.

Parameter Comparison

Part Number	Manufacturer	Clock Freq (MHz)	Max Prop Delay (ns)	Iq (µA)	Output Current (mA)	Temp Range (°C)	RoHS Status	Product Status	Packaging
CD74HCT574ME4	Texas Instruments	60	33 @ 4.5V, 50pF	8	6 / 6	-55 ~ 125	ROHS3 Compliant	Last Time Buy	Tube
CD74HCT574M	Harris Corporation	60	33 @ 4.5V, 50pF	8	6 / 6	-55 ~ 125	RoHS non-compliant	Obsolete	Tube
CD74HCT574M96	Harris Corporation	60	15 @ 5V, 15pF	8	6 / 6	-55 ~ 125	RoHS non-compliant	Obsolete	Bulk
CD74HCT374M	Harris Corporation	60	33 @ 4.5V, 50pF	8	6 / 6	-55 ~ 125	RoHS non-compliant	Obsolete	Tube
74HCT574D,653	Nexperia USA Inc.	76	33 @ 4.5V, 50pF	8	6 / 6	-40 ~ 125	ROHS3 Compliant	Active	Tape & Reel
74HCT574D-Q100,118	Nexperia USA Inc.	76	33 @ 4.5V, 50pF	8	6 / 6	-40 ~ 125	ROHS3 Compliant	Active	Tape & Reel
MC74HCT574ADWR2G	onsemi	30	30 @ 5V, 50pF	4	6 / 6	-55 ~ 125	ROHS3 Compliant	Active	Tape & Reel
MM74HCT574WM	onsemi	33	30 @ 5V, 50pF	8	7.2 / 7.2	-40 ~ 85	ROHS3 Compliant	Active	Tube
MM74HCT574WMX	onsemi	33	30 @ 5V, 50pF	8	7.2 / 7.2	-40 ~ 85	ROHS3 Compliant	Active	Tape & Reel

Engineering Selection Recommendations

Active Product Alternatives (Recommended for New Designs):

The Nexperia 74HCT574D,653 and 74HCT574D-Q100,118 are active products with ROHS3 compliance and extended clock frequency (76 MHz). These parts meet or exceed the electrical specifications of the CD74HCT574ME4 and provide long-term supply availability. The automotive-qualified variant (74HCT574D-Q100,118) includes AEC-Q100 certification for applications requiring automotive-grade components.

The onsemi MC74HCT574ADWR2G is an active ROHS3-compliant alternative with improved quiescent current (4 µA vs. 8 µA) and faster propagation delay (30ns @ 5V). This part is suitable for power-sensitive applications. The onsemi MM74HCT574WM and MM74HCT574WMX variants are active products with ROHS3 compliance, offering 33 MHz clock frequency and 30ns propagation delay.

Obsolete Product Alternatives (Legacy Support Only):

The Harris Corporation CD74HCT574M and CD74HCT574M96 are obsolete parts with identical electrical specifications to the main part but lack ROHS3 compliance. These should be used only for legacy system maintenance where supply is available. The CD74HCT574M96 offers improved propagation delay (15ns @ 5V, 15pF) but is supplied in bulk packaging.

The Harris CD74HCT374M is a parametric equivalent with identical electrical performance but represents a different base product number (74HCT374 vs. 74HCT574). Functional compatibility must be verified against specific application requirements.

Compliance Considerations:

For new designs or systems requiring environmental compliance, select from active products with ROHS3 certification: Nexperia 74HCT574D,653, 74HCT574D-Q100,118, or onsemi MC74HCT574ADWR2G, MM74HCT574WM, or MM74HCT574WMX.

Frequently Asked Questions (FAQ)

Q: Can I directly replace CD74HCT574ME4 with any of the listed substitutes?

A: Direct replacement is possible only with parts sharing identical electrical specifications and package type. The Nexperia 74HCT574D,653 and onsemi MC74HCT574ADWR2G are fully compatible. Verify packaging format (Tube vs. Tape & Reel) matches your assembly process requirements.

Q: What is the difference between MFR Recommended and Parametric Equivalent substitutes?

A: MFR Recommended substitutes are direct equivalents from the same or authorized manufacturers with matching base product numbers and electrical specifications. Parametric Equivalent parts (such as CD74HCT374M) have the same functional performance but may differ in base product designation and require functional verification.

Q: Are obsolete parts (Harris Corporation variants) still usable?

A: Obsolete parts may be available from inventory but lack ROHS3 compliance and have no guaranteed future supply. Use only for legacy system maintenance where active alternatives are unsuitable or unavailable.

Q: What is the significance of the operating temperature range difference?

A: The CD74HCT574ME4 operates from -55°C to 125°C. Some substitutes (onsemi MM74HCT574WM, MM74HCT574WMX) operate from -40°C to 85°C. Verify your application's temperature requirements before substitution. Nexperia and onsemi MC74HCT574ADWR2G variants support the full -55°C to 125°C range.

Q: Does packaging format affect electrical performance?

A: No. Tube, Bulk, and Tape & Reel packaging formats do not affect electrical performance. Selection depends on assembly process requirements and quantity handling. Verify your manufacturing equipment compatibility with the selected packaging format.

Q: Why do some substitutes have lower quiescent current specifications?

A: The onsemi MC74HCT574ADWR2G specifies 4 µA quiescent current versus 8 µA for the main part. This represents improved power efficiency and is fully compatible. Lower quiescent current is a beneficial characteristic for power-constrained applications.

Q: Is the automotive-qualified variant (74HCT574D-Q100,118) suitable for non-automotive applications?

A: Yes. Automotive-qualified parts meet or exceed standard industrial specifications and include AEC-Q100 certification. These parts are suitable for any application requiring the 74HCT574 function and provide enhanced reliability documentation.

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