74LCX374WM Equivalent & Substitute Parts

Part Overview

The 74LCX374WM is a D-type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit capacity and tri-state, non-inverted output configuration. This device operates at a maximum clock frequency of 150 MHz with a propagation delay of 8.5 ns at 3.3V and 50 pF load. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	74LCX374WM
Manufacturer	onsemi
Series	74LCX
Function	D-Type Flip-Flop
Number of Elements	1
Number of Bits per Element	8
Output Type	Tri-State, Non-Inverted
Clock Frequency (Max)	150 MHz
Propagation Delay @ 3.3V, 50pF	8.5 ns
Trigger Type	Positive Edge
Output Current (High/Low)	24 mA / 24 mA
Supply Voltage Range	2V to 3.6V
Quiescent Current	10 µA
Input Capacitance	7 pF
Operating Temperature	-40°C to 85°C
Package Type	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74LCX374WM is determined by the following critical parameters:

Functional equivalence: D-Type flip-flop with 1 element, 8-bit configuration, tri-state non-inverted output
Trigger mechanism: Positive edge triggering
Package compatibility: 20-SOIC surface mount form factor
Electrical performance: Clock frequency, propagation delay, output current drive, and supply voltage range
Operating temperature range: Minimum -40°C to 85°C support

Substitute parts are grouped into two categories: direct equivalents from onsemi (74LCX series) and functional equivalents from alternative manufacturers (74LVC series). The 74LVC series represents an enhanced logic family with improved performance characteristics while maintaining functional and package compatibility.

Parameter Comparison

Parameter	74LCX374WM (Main)	MC74LCX374DWR2G	74LVC374AD,118	74LVC374AD-Q100J	SN74LVC374ADW	SN74LVC374ADWR	SN74LVC374ANSR
Manufacturer	onsemi	onsemi	Nexperia USA Inc.	Nexperia USA Inc.	Texas Instruments	Texas Instruments	Texas Instruments
Series	74LCX	74LCX	74LVC	74LVC	74LVC	74LVC	74LVC
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Number of Elements	1	1	1	1	1	1	1
Number of Bits per Element	8	8	8	8	8	8	8
Output Type	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted
Clock Frequency (Max)	150 MHz	150 MHz	150 MHz	150 MHz	100 MHz	100 MHz	100 MHz
Propagation Delay @ 3.3V, 50pF	8.5 ns	8.5 ns	7 ns	7 ns	7 ns	7 ns	7 ns
Trigger Type	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge
Output Current (High/Low)	24 mA / 24 mA	24 mA / 24 mA	24 mA / 24 mA	24 mA / 24 mA	24 mA / 24 mA	24 mA / 24 mA	24 mA / 24 mA
Supply Voltage Range	2V to 3.6V	2V to 3.6V	1.65V to 3.6V	1.65V to 3.6V	1.65V to 3.6V	1.65V to 3.6V	1.65V to 3.6V
Quiescent Current	10 µA	10 µA	10 µA	10 µA	10 µA	10 µA	10 µA
Input Capacitance	7 pF	7 pF	4 pF	4 pF	4 pF	4 pF	4 pF
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 125°C	-40°C to 125°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C
Package Type	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.209", 5.30mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Automotive Grade	Not specified	Not specified	Not specified	AEC-Q100	Not specified	Not specified	Not specified

Engineering Selection Recommendations

Primary Substitute: MC74LCX374DWR2G

The MC74LCX374DWR2G from onsemi is the direct equivalent within the same 74LCX series. It maintains identical electrical specifications including 150 MHz clock frequency and 8.5 ns propagation delay. This part is currently active in production. The primary consideration is moisture sensitivity level 3 (168 hours) compared to the original part's level 1, requiring appropriate handling during storage and assembly.

Secondary Substitutes: 74LVC Series (Nexperia and Texas Instruments)

The 74LVC374 variants from Nexperia USA Inc. and Texas Instruments represent functional equivalents with enhanced performance characteristics. These parts feature improved propagation delay (7 ns versus 8.5 ns), extended supply voltage range (1.65V to 3.6V versus 2V to 3.6V), and extended operating temperature range to 125°C. All 74LVC variants are ROHS3 compliant and carry moisture sensitivity level 1.

Automotive Applications: 74LVC374AD-Q100J

For automotive applications requiring AEC-Q100 qualification, the 74LVC374AD-Q100J from Nexperia USA Inc. is the appropriate selection. This part maintains all functional and electrical compatibility while meeting automotive-grade standards.

Package Consideration: SN74LVC374ANSR

The SN74LVC374ANSR from Texas Instruments features a narrower 20-SOIC package (0.209" width versus 0.295" width). This variant is suitable only for designs with PCB layouts accommodating the reduced package width. All other electrical and functional parameters remain equivalent to other 74LVC variants.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74LCX374WM with MC74LCX374DWR2G?

A: Yes. Both parts are from the onsemi 74LCX series with identical electrical specifications, functional configuration, and package type. The primary difference is product status (active versus obsolete) and moisture sensitivity level (3 versus 1). Standard moisture control during assembly is required.

Q: What is the difference between 74LCX and 74LVC series?

A: Both series provide D-type flip-flop logic with identical functional configuration and package compatibility. The 74LVC series offers improved propagation delay (7 ns versus 8.5 ns), extended supply voltage range (1.65V minimum versus 2V minimum), and extended operating temperature range (125°C maximum versus 85°C maximum). All 74LVC variants are currently active in production.

Q: Are all substitute parts pin-compatible?

A: Yes. All listed substitute parts maintain the 20-SOIC package configuration with identical pin assignments. The SN74LVC374ANSR features a narrower package width (0.209" versus 0.295") but maintains identical pin spacing and functionality. PCB layout verification is required for this variant.

Q: Which substitute part should I select for new designs?

A: For general applications, any active 74LVC variant (74LVC374AD,118, 74LVC374AD-Q100J, SN74LVC374ADW, or SN74LVC374ADWR) is suitable. For automotive applications, select 74LVC374AD-Q100J. For designs requiring extended operating temperature range to 125°C, select any 74LVC variant. For designs with space constraints accommodating narrower packages, select SN74LVC374ANSR.

Q: What is the impact of moisture sensitivity level differences?

A: Moisture sensitivity level 1 (unlimited) allows indefinite storage without moisture control. Moisture sensitivity level 3 (168 hours) requires storage in controlled humidity environments and limits the time between package opening and assembly. MC74LCX374DWR2G requires moisture control procedures during handling and assembly.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant. The original 74LCX374WM RoHS status is not specified in available documentation.

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