74VHC74M Equivalent & Substitute Parts

Part Overview

The 74VHC74M is a dual D-type flip-flop logic integrated circuit manufactured by onsemi in 14-SOIC surface mount packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The 74VHC74M serves applications requiring positive edge-triggered flip-flop functionality with complementary outputs across industrial and commercial temperature ranges.

Key Parameters

Parameter	Value
Manufacturer Part Number	74VHC74M
Manufacturer	onsemi
Series	74VHC
Type	D-Type Flip-Flop, 2 Element, 1 Bit per Element
Output Type	Complementary
Trigger Type	Positive Edge
Clock Frequency	115 MHz
Max Propagation Delay @ 5V, 50pF	9.3 ns
Voltage Supply Range	2V to 5.5V
Current Output High/Low	8 mA / 8 mA
Quiescent Current	2 µA
Input Capacitance	4 pF
Operating Temperature	-40°C to 85°C
Package	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 74VHC74M is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Parameters:

Package type: 14-SOIC (0.154", 3.90mm Width)
Function: D-Type flip-flop with Set/Preset and Reset capability
Output configuration: Complementary outputs
Trigger mechanism: Positive edge
Number of elements: 2
Bits per element: 1
Voltage supply range: Must encompass or match 2V to 5.5V
Current output capability: 8 mA minimum for both high and low states
Mounting type: Surface Mount

Substitute parts are grouped into three categories based on electrical performance and product status:

Direct Substitutes (74AHC Series): Parts maintaining identical or superior electrical specifications with active product status. These include SN74AHC74D, SN74AHC74DR, SN74AHC74QDRQ1, and SN74AHC74QDRG4Q1 from Texas Instruments. All operate within the required voltage range, maintain 115 MHz clock frequency, and provide 8 mA output current.

Upgrade Substitutes (74AHC Series with Extended Temperature): Parts offering enhanced temperature operating ranges or automotive qualification. These include 74AHC74D,118 from Nexperia USA Inc. and SN74AHC74MDREP from Texas Instruments, both supporting -40°C to 125°C operation.

Similar Substitutes (74AHCT and 74HC Series): Parts with compatible package and function but differing electrical characteristics. The 74AHCT series (74AHCT74D,118 and 74AHCT74D-Q100J) operates at 140 MHz with restricted voltage range (4.5V to 5.5V). The 74HC series (CD74HC74M and CD74HC74MT) operates at 50 MHz with extended voltage range (2V to 6V) but reduced output current (5.2 mA).

Parameter Comparison

Part Number	Manufacturer	Series	Clock Frequency	Max Propagation Delay @ 5V, 50pF	Voltage Supply	Output Current (High/Low)	Operating Temperature	Product Status	Package
74VHC74M	onsemi	74VHC	115 MHz	9.3 ns	2V to 5.5V	8 mA / 8 mA	-40°C to 85°C	Obsolete	14-SOIC
SN74AHC74D	Texas Instruments	74AHC	115 MHz	6.1 ns	2V to 5.5V	8 mA / 8 mA	-40°C to 125°C	Discontinued at DiGi Electronics	14-SOIC
SN74AHC74DR	Texas Instruments	74AHC	115 MHz	6.1 ns	2V to 5.5V	8 mA / 8 mA	-40°C to 125°C	Active	14-SOIC
SN74AHC74QDRQ1	Texas Instruments	74AHC	115 MHz	9.3 ns	2V to 5.5V	8 mA / 8 mA	-40°C to 125°C	Active	14-SOIC
SN74AHC74QDRG4Q1	Texas Instruments	74AHC	115 MHz	9.3 ns	2V to 5.5V	8 mA / 8 mA	-40°C to 125°C	Active	14-SOIC
74AHC74D,118	Nexperia USA Inc.	74AHC	115 MHz	9.3 ns	2V to 5.5V	8 mA / 8 mA	-40°C to 125°C	Active	14-SOIC
SN74AHC74MDREP	Texas Instruments	74AHC	115 MHz	9.3 ns	2V to 5.5V	8 mA / 8 mA	-55°C to 125°C	Active	14-SOIC
74AHCT74D,118	NXP Semiconductors	74AHCT	140 MHz	8.8 ns	4.5V to 5.5V	8 mA / 8 mA	-40°C to 125°C	Active	14-SOIC
74AHCT74D-Q100J	Nexperia USA Inc.	74AHCT	140 MHz	8.8 ns	4.5V to 5.5V	8 mA / 8 mA	-40°C to 125°C	Active	14-SOIC
CD74HC74M	Texas Instruments	74HC	50 MHz	30 ns	2V to 6V	5.2 mA / 5.2 mA	-55°C to 125°C	Discontinued at DiGi Electronics	14-SOIC
CD74HC74MT	Texas Instruments	74HC	50 MHz	30 ns	2V to 6V	5.2 mA / 5.2 mA	-55°C to 125°C	Obsolete	14-SOIC

Engineering Selection Recommendations

For Direct Replacement with Active Product Status:

SN74AHC74DR is the primary recommended substitute. This part maintains identical electrical specifications to the 74VHC74M, operates within the same voltage supply range (2V to 5.5V), delivers equivalent 8 mA output current, and is currently active in production. The extended operating temperature range (-40°C to 125°C) provides additional margin beyond the original -40°C to 85°C specification. ROHS3 compliance and MSL 1 rating match the original part.

For Extended Temperature Applications:

SN74AHC74MDREP extends the operating temperature range to -55°C to 125°C, suitable for applications requiring enhanced low-temperature performance. This part maintains all other electrical parameters identical to the 74VHC74M and carries active product status.

For Automotive-Grade Applications:

SN74AHC74QDRG4Q1 and SN74AHC74QDRQ1 provide AEC-Q100 automotive qualification with active product status. Both maintain the 2V to 5.5V voltage range and 8 mA output current specification.

For Voltage-Restricted Applications (4.5V to 5.5V Only):

74AHCT74D,118 and 74AHCT74D-Q100J operate at higher clock frequency (140 MHz) with faster propagation delay (8.8 ns). These parts are suitable only when the design operates exclusively within the 4.5V to 5.5V voltage window and does not require the extended low-voltage capability of the original part.

Not Recommended for Direct Replacement:

CD74HC74M and CD74HC74MT operate at reduced clock frequency (50 MHz) and provide lower output current (5.2 mA). These parts are suitable only for applications with relaxed timing requirements and lower current demands.

Frequently Asked Questions (FAQ)

Q: Can SN74AHC74DR be used as a direct replacement for 74VHC74M?

A: Yes. SN74AHC74DR maintains identical package (14-SOIC), function (dual D-type flip-flop with complementary outputs), voltage supply range (2V to 5.5V), output current (8 mA), and clock frequency (115 MHz). The extended operating temperature range (-40°C to 125°C) provides additional margin. ROHS3 compliance and MSL 1 rating are equivalent.

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

A: The 74AHCT series restricts the voltage supply range to 4.5V to 5.5V, whereas 74AHC maintains the wider 2V to 5.5V range. The 74AHCT series operates at higher clock frequency (140 MHz) with faster propagation delay (8.8 ns). Use 74AHCT only when the design operates exclusively within the 4.5V to 5.5V window.

Q: Why is propagation delay different between substitute parts?

A: Propagation delay varies based on semiconductor process technology and design optimization. SN74AHC74D achieves 6.1 ns, while SN74AHC74QDRQ1 and SN74AHC74QDRG4Q1 achieve 9.3 ns (matching the original 74VHC74M). All values remain within acceptable timing margins for standard logic applications. Verify timing requirements against specific application constraints.

Q: Can 74HC series parts replace 74VHC74M?

A: CD74HC74M and CD74HC74MT are not recommended for direct replacement. These parts operate at reduced clock frequency (50 MHz) and provide lower output current (5.2 mA). Use only when application timing requirements are relaxed and current demands are reduced.

Q: What packaging options are available for substitutes?

A: All substitute parts maintain the 14-SOIC (0.154", 3.90mm Width) surface mount package. Packaging variants differ by tape format (Tube, Cut Tape & Digi-Reel, Tape & Reel, or Bulk) but do not affect electrical or mechanical compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original 74VHC74M specification.

Q: Which substitute part offers the widest operating temperature range?

A: SN74AHC74MDREP operates from -55°C to 125°C, providing the widest temperature coverage. This part is suitable for applications requiring enhanced low-temperature performance while maintaining active product status.

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