CD74HC374M Equivalent & Substitute Parts

Part Overview

The CD74HC374M 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 classified as Last Time Buy, indicating limited availability from the original manufacturer. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term production requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD74HC374M
Manufacturer	Texas Instruments
Series	74HC
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
Voltage Supply Range	2V ~ 6V
Operating Temperature	-55°C ~ 125°C
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC374M is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Package / Case: 20-SOIC (0.295", 7.50mm Width)
Type: D-Type Flip-Flop
Number of Elements: 1
Number of Bits per Element: 8
Output Type: Tri-State, Non-Inverted
Trigger Type: Positive Edge
Mounting Type: Surface Mount

Allowable Parameter Variations:

Clock Frequency: 35 MHz minimum (CD74HC374M operates at 60 MHz)
Voltage Supply Range: Must encompass or be compatible with 2V ~ 6V
Operating Temperature: Must support -55°C ~ 125°C or compatible subset
Max Propagation Delay: Variations acceptable within functional requirements
Current Output specifications: Variations acceptable within functional requirements
Quiescent Current: Variations acceptable
RoHS and REACH compliance: ROHS3 Compliant preferred

Substitute parts are grouped into two categories: MFR Recommended (direct manufacturer alternatives) and Parametric Equivalents (functionally compatible alternatives from other manufacturers).

Parameter Comparison

Part Number	Manufacturer	Series	Clock Frequency	Max Propagation Delay @ 6V, 50pF	Voltage Supply	Operating Temperature	Product Status	Package	RoHS Status
CD74HC374M	Texas Instruments	74HC	60 MHz	28ns	2V ~ 6V	-55°C ~ 125°C	Last Time Buy	20-SOIC	ROHS3 Compliant
CD74HC374M96	Texas Instruments	74HC	60 MHz	28ns	2V ~ 6V	-55°C ~ 125°C	Active	20-SOIC	ROHS3 Compliant
MC74HC374ADWR2G	onsemi	74HC	35 MHz	21ns	2V ~ 6V	-55°C ~ 125°C	Active	20-SOIC	ROHS3 Compliant
MC74HC374ADWG	onsemi	74HC	35 MHz	21ns	2V ~ 6V	-55°C ~ 125°C	Active	20-SOIC	ROHS3 Compliant
74HC374D	Toshiba Semiconductor and Storage	74HC	90 MHz	32ns @ 6V, 150pF	2V ~ 6V	-40°C ~ 125°C	Active	20-SOIC	ROHS3 Compliant
74HC374D,653	Nexperia USA Inc.	74HC	83 MHz	28ns	2V ~ 6V	-40°C ~ 125°C	Active	20-SOIC	ROHS3 Compliant
74AHC374D,118	Nexperia USA Inc.	74AHC	120 MHz	10.1ns @ 5V, 50pF	2V ~ 5.5V	-40°C ~ 125°C	Active	20-SOIC	ROHS3 Compliant
74AHC574D,118	Nexperia USA Inc.	74AHC	115 MHz	10.6ns @ 5V, 50pF	2V ~ 5.5V	-40°C ~ 125°C	Active	20-SOIC	ROHS3 Compliant
CD74HC574M	Harris Corporation	74HC	60 MHz	28ns	2V ~ 6V	-55°C ~ 125°C	Obsolete	20-SOIC	RoHS non-compliant
MC74HC377ADWR2G	onsemi	74HC	35 MHz	27ns	2V ~ 6V	-55°C ~ 125°C	Obsolete	20-SOIC	ROHS3 Compliant
MC74HC574ADWG	onsemi	74HC	35 MHz	27ns	2V ~ 6V	-55°C ~ 125°C	Active	20-SOIC	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: CD74HC374M96

CD74HC374M96 is the direct manufacturer equivalent from Texas Instruments with identical electrical specifications and operating parameters. This part is in Active product status with higher inventory availability (22,155 units) compared to the original CD74HC374M (Last Time Buy status). The primary distinction is packaging format: CD74HC374M96 is supplied in Tape & Reel format while CD74HC374M is supplied in Tube format. Both maintain ROHS3 compliance and identical performance characteristics.

Secondary Recommendations: onsemi 74HC Series

MC74HC374ADWR2G and MC74HC374ADWG from onsemi provide functional equivalence with Active product status. These parts operate at 35 MHz clock frequency (lower than the original 60 MHz specification) and deliver improved propagation delay performance (21ns versus 28ns). Both maintain full voltage supply compatibility (2V ~ 6V) and operating temperature range (-55°C ~ 125°C). ROHS3 compliance is maintained. Moisture sensitivity differs: MC74HC374ADWR2G carries MSL 3 (168 Hours) while MC74HC374ADWG carries MSL 3 (168 Hours).

Alternative Recommendation: Toshiba 74HC374D

74HC374D from Toshiba Semiconductor and Storage is an Active product with enhanced clock frequency performance (90 MHz). This part maintains 2V ~ 6V voltage supply compatibility and ROHS3 compliance. Operating temperature range is -40°C ~ 125°C (narrower than the original -55°C ~ 125°C). Propagation delay is specified at 32ns with 150pF load, differing from the original 28ns specification at 50pF load.

Higher Performance Alternative: Nexperia 74AHC Series

74AHC374D,118 and 74AHC574D,118 from Nexperia USA Inc. represent higher-performance alternatives within the 74AHC series. These parts deliver significantly improved propagation delay (10.1ns and 10.6ns respectively) and higher clock frequency (120 MHz and 115 MHz). Voltage supply range is 2V ~ 5.5V (narrower than the original 2V ~ 6V specification). Operating temperature is -40°C ~ 125°C. ROHS3 compliance is maintained. These parts are suitable for applications requiring enhanced speed performance within the constrained voltage range.

Parts to Avoid:

CD74HC574M (Harris Corporation) is Obsolete and RoHS non-compliant. MC74HC377ADWR2G (onsemi) is Obsolete. These parts should not be selected for new designs or long-term production.

Frequently Asked Questions (FAQ)

Q: Can CD74HC374M96 be used as a direct replacement for CD74HC374M?

A: Yes. CD74HC374M96 is electrically and functionally identical to CD74HC374M. The only difference is packaging format: CD74HC374M96 is supplied in Tape & Reel format while CD74HC374M is supplied in Tube format. Both parts maintain identical electrical specifications, operating temperature range (-55°C ~ 125°C), voltage supply (2V ~ 6V), and ROHS3 compliance. CD74HC374M96 is recommended as the primary substitute due to Active product status and higher inventory availability.

Q: What is the difference between 74HC and 74AHC series parts?

A: The 74AHC series (represented by 74AHC374D,118 and 74AHC574D,118) offers higher performance than the 74HC series. 74AHC parts deliver faster propagation delay (10.1ns to 10.6ns versus 21ns to 28ns) and higher clock frequency (115 MHz to 120 MHz versus 35 MHz to 90 MHz). However, 74AHC parts have a narrower voltage supply range (2V ~ 5.5V versus 2V ~ 6V). Selection depends on whether the application requires the extended voltage range of 74HC parts or the enhanced speed of 74AHC parts.

Q: Are all substitute parts ROHS3 compliant?

A: No. CD74HC574M (Harris Corporation) is RoHS non-compliant and should not be used. All other listed substitute parts are ROHS3 compliant. MC74HC377ADWR2G is ROHS3 compliant but is Obsolete and should not be selected.

Q: What does "Last Time Buy" status mean for CD74HC374M?

A: Last Time Buy indicates that the manufacturer (Texas Instruments) has announced the end of production for this part. Existing inventory may be available, but no new production runs are planned. This status makes CD74HC374M96 (Active status) the recommended substitute to ensure long-term supply chain continuity.

Q: Can onsemi MC74HC374ADWR2G be used if my application requires the full -55°C to 125°C temperature range?

A: Yes. MC74HC374ADWR2G supports the full -55°C ~ 125°C operating temperature range, matching the original CD74HC374M specification. The part is suitable for applications requiring extended temperature operation.

Q: What is the significance of Moisture Sensitivity Level (MSL)?

A: MSL indicates the maximum time a component can be exposed to moisture at specified temperature and humidity conditions before soldering. CD74HC374M has MSL 1 (Unlimited), meaning no time restriction. MC74HC374ADWR2G and MC74HC374ADWG have MSL 3 (168 Hours), requiring the component to be soldered within 168 hours of exposure to moisture. This affects storage and handling procedures but does not impact electrical performance.

Q: Is the 20-SOIC package identical across all substitute parts?

A: Yes. All listed substitute parts use the 20-SOIC (0.295", 7.50mm Width) package, ensuring mechanical and electrical compatibility with the original CD74HC374M. PCB layout and footprints remain unchanged.

Q: Why are CD74HC574M and MC74HC574ADWG listed as substitutes if they have different base product numbers?

A: CD74HC574M and MC74HC574ADWG are functionally equivalent D-Type flip-flops with identical pin configurations and electrical characteristics. The base product number difference (74HC374 versus 74HC574) reflects different internal logic configurations, but both parts serve the same functional role in applications requiring 8-bit D-Type flip-flop operation with tri-state outputs. Compatibility must be verified at the circuit level.

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