SN74HC374DW Equivalent & Substitute Parts

Part Overview

The SN74HC374DW 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 currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers. The device operates across a 2V to 6V supply range with tri-state, non-inverted outputs suitable for bus driver applications in digital logic circuits.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN74HC374DW
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	70 MHz
Max Propagation Delay @ V, Max CL	15ns @ 6V, 50pF
Trigger Type	Positive Edge
Voltage - Supply	2V ~ 6V
Current - Output High, Low	7.8mA, 7.8mA
Current - Quiescent (Iq)	8 µA
Input Capacitance	3 pF
Operating Temperature	-40°C ~ 85°C (TA)
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	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution eligibility for the SN74HC374DW is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Package type: 20-SOIC (0.295", 7.50mm Width) surface mount
Function: D-Type flip-flop with 1 element, 8-bit configuration
Output configuration: Tri-state, non-inverted outputs
Trigger mechanism: Positive edge triggering
Supply voltage range: Must encompass or be compatible with 2V ~ 6V operation

Performance Parameters (allowable variation):

Clock frequency: Minimum 70 MHz required for direct substitution; higher frequencies acceptable
Propagation delay: Maximum 15ns @ 6V, 50pF; longer delays acceptable in non-time-critical applications
Output current: 7.8mA minimum; higher ratings acceptable
Quiescent current: 8 µA baseline; lower values acceptable
Input capacitance: 3 pF baseline; variations acceptable within logic family specifications
Operating temperature: -40°C ~ 85°C baseline; extended ranges acceptable

Compliance Requirements:

RoHS3 compliance required
REACH unaffected status required

Substitute parts are grouped into three categories based on series designation and performance characteristics: 74HC series (direct functional equivalents), 74AHC series (enhanced performance variants), and alternative manufacturer implementations maintaining identical pinout and electrical specifications.

Parameter Comparison

Parameter	SN74HC374DW	SN74HC374DWR	MC74HC374ADWR2G	MM74HC374WMX	74AHC374D,118	74HC374D	74HC374D,653	MC74HC374ADWG
Manufacturer	Texas Instruments	Texas Instruments	onsemi	Fairchild Semiconductor	Nexperia USA Inc.	Toshiba Semiconductor	Nexperia USA Inc.	onsemi
Series	74HC	74HC	74HC	74HC	74AHC	74HC	74HC	74HC
Type	D-Type	D-Type	D-Type	D-Type	D-Type	D-Type	D-Type	D-Type
Number of Bits per Element	8	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	Tri-State, Non-Inverted
Clock Frequency	70 MHz	70 MHz	35 MHz	35 MHz	120 MHz	90 MHz	83 MHz	35 MHz
Max Propagation Delay @ V, Max CL	15ns @ 6V, 50pF	15ns @ 6V, 50pF	21ns @ 6V, 50pF	40ns @ 6V, 150pF	10.1ns @ 5V, 50pF	32ns @ 6V, 150pF	28ns @ 6V, 50pF	21ns @ 6V, 50pF
Trigger Type	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge
Current - Output High, Low	7.8mA, 7.8mA	7.8mA, 7.8mA	7.8mA, 7.8mA	7.8mA, 7.8mA	8mA, 8mA	7.8mA, 7.8mA	7.8mA, 7.8mA	7.8mA, 7.8mA
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 5.5V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Current - Quiescent (Iq)	8 µA	8 µA	4 µA	8 µA	4 µA	4 µA	4 µA	4 µA
Input Capacitance	3 pF	3 pF	10 pF	5 pF	3 pF	3 pF	4.6 pF	10 pF
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-55°C ~ 125°C
Package / Case	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	Not specified	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)
Product Status	Discontinued	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Recommendation: SN74HC374DWR

The SN74HC374DWR from Texas Instruments is the direct functional equivalent, maintaining identical electrical specifications, clock frequency (70 MHz), propagation delay (15ns @ 6V, 50pF), and operating temperature range (-40°C ~ 85°C). This part is currently active in production and available in Cut Tape and Digi-Reel packaging. RoHS3 compliance and MSL 1 rating match the original specification. Selection of this part eliminates any performance or compliance risk.

Secondary Recommendation: 74HC374D,653 (Nexperia USA Inc.)

The 74HC374D,653 provides active production status with RoHS3 compliance and MSL 1 rating. Clock frequency of 83 MHz exceeds the original 70 MHz specification. Propagation delay of 28ns @ 6V, 50pF is longer than the original 15ns but remains within acceptable parameters for non-time-critical applications. Operating temperature range extends to -40°C ~ 125°C, providing enhanced thermal margin. This part is suitable for applications where extended temperature operation is beneficial.

Alternative for Enhanced Performance: 74AHC374D,118 (Nexperia USA Inc.)

The 74AHC374D,118 represents the 74AHC series variant with superior clock frequency (120 MHz) and reduced propagation delay (10.1ns @ 5V, 50pF). Supply voltage range is 2V ~ 5.5V, which is compatible with the original 2V ~ 6V specification at the lower end. RoHS3 compliance and MSL 1 rating are maintained. This part is suitable for applications requiring higher speed performance and is available in active production status.

onsemi Alternatives: MC74HC374ADWR2G and MC74HC374ADWG

Both onsemi parts maintain functional equivalence with identical 8-bit D-Type configuration and tri-state non-inverted outputs. Clock frequency is reduced to 35 MHz, and propagation delay increases to 21ns @ 6V, 50pF. Operating temperature range extends to -55°C ~ 125°C. MSL rating is 3 (168 Hours), requiring controlled storage conditions. These parts are suitable for applications with relaxed timing requirements and extended temperature operation.

Fairchild Semiconductor Alternative: MM74HC374WMX

The MM74HC374WMX maintains functional equivalence with 35 MHz clock frequency and 40ns propagation delay @ 6V, 150pF. Operating temperature range is -40°C ~ 85°C. This part is available in bulk packaging and is suitable for high-volume applications with relaxed timing requirements.

Not Recommended: MC74HC377ADWR2G

The MC74HC377ADWR2G is marked as obsolete and features non-inverted output configuration without tri-state capability, making it functionally incompatible with the original SN74HC374DW specification.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with lower clock frequency than the original SN74HC374DW?

A: Yes, if your application does not require the full 70 MHz clock frequency. Parts such as MC74HC374ADWR2G and MM74HC374WMX operate at 35 MHz. Verify that your circuit timing requirements are met before substitution. Lower clock frequency does not affect functional compatibility in applications with relaxed timing constraints.

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

A: The 74AHC series (such as 74AHC374D,118) offers enhanced performance with higher clock frequency (120 MHz vs. 70 MHz) and faster propagation delay (10.1ns vs. 15ns). Supply voltage range for 74AHC is 2V ~ 5.5V, which is compatible with the original 2V ~ 6V specification. The 74AHC series is suitable for applications requiring higher speed operation.

Q: Are all substitute parts available in the same 20-SOIC package?

A: Yes, all listed substitute parts are available in the 20-SOIC (0.295", 7.50mm Width) surface mount package, ensuring mechanical and electrical compatibility with the original SN74HC374DW footprint.

Q: What does MSL 3 (168 Hours) mean compared to MSL 1 (Unlimited)?

A: MSL 3 parts require controlled storage conditions and must be used within 168 hours of opening the moisture barrier bag. MSL 1 parts have unlimited shelf life after opening. If your manufacturing process includes extended storage periods, select MSL 1 rated parts such as SN74HC374DWR or 74HC374D,653 to avoid moisture-related failures.

Q: Can I substitute the SN74HC374DW with a part having extended operating temperature range?

A: Yes. Parts such as MC74HC374ADWR2G, 74AHC374D,118, 74HC374D, and 74HC374D,653 offer operating temperature ranges extending to -55°C or -40°C to 125°C. These extended ranges are backward compatible with the original -40°C ~ 85°C specification and provide additional thermal margin for demanding applications.

Q: What is the significance of RoHS3 compliance for this part?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations, restricting lead and other hazardous materials. All recommended substitute parts maintain RoHS3 compliance, ensuring regulatory compliance for end-use applications in regulated markets.

Q: Are there packaging format differences among the substitute parts?

A: Yes. SN74HC374DWR is available in Cut Tape and Digi-Reel packaging. 74AHC374D,118 and 74HC374D,653 are available in Tape & Reel format. MC74HC374ADWG is available in Tube packaging. MM74HC374WMX is available in Bulk packaging. Select the packaging format that matches your procurement and assembly requirements.

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