SN74LVC74ADRG4 Equivalent & Substitute Parts

Part Overview

The SN74LVC74ADRG4 is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments, housed in a 14-SOIC package. This device provides two independent D-type flip-flops with Set (Preset) and Reset functions, complementary outputs, and positive edge triggering. The part is currently classified as Obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN74LVC74ADRG4
Manufacturer	Texas Instruments
Series	74LVC
Type	D-Type Flip-Flop
Number of Elements	2
Number of Bits per Element	1
Output Type	Complementary
Clock Frequency	150 MHz
Max Propagation Delay @ 3.3V, 50pF	5.2 ns
Trigger Type	Positive Edge
Current - Output High/Low	24 mA / 24 mA
Voltage - Supply	1.65V ~ 3.6V
Current - Quiescent (Iq)	10 µA
Input Capacitance	5 pF
Operating Temperature	-40°C ~ 125°C (TA)
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the SN74LVC74ADRG4 is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

D-Type flip-flop architecture with 2 elements, 1 bit per element
Complementary output configuration
Positive edge trigger mechanism
150 MHz clock frequency capability
14-SOIC package form factor (0.154", 3.90mm Width)
Surface mount mounting type
Set (Preset) and Reset functionality

Secondary Compatibility Parameters:

Supply voltage range (minimum 1.65V required for full compatibility)
Propagation delay performance (5.2 ns @ 3.3V, 50pF is baseline)
Output drive capability (24 mA minimum)
Operating temperature range (-40°C to 125°C minimum)
Quiescent current specification (10 µA)

Substitute parts are grouped into two categories: Parametric Equivalents (identical electrical specifications and packaging) and Manufacturer Recommended Alternatives (functionally equivalent with minor parameter variations acceptable for most applications).

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	Clock Frequency	Propagation Delay @ 3.3V, 50pF	Supply Voltage	Operating Temp	Package	Inventory
SN74LVC74ADRG4	Texas Instruments	74LVC	Obsolete	150 MHz	5.2 ns	1.65V ~ 3.6V	-40°C ~ 125°C	14-SOIC	2300 Pcs
SN74LVC74ADR	Texas Instruments	74LVC	Active	150 MHz	5.2 ns	1.65V ~ 3.6V	-40°C ~ 125°C	14-SOIC	2160 Pcs
SN74LVC74ADT	Texas Instruments	74LVC	Active	150 MHz	5.2 ns	1.65V ~ 3.6V	-40°C ~ 125°C	14-SOIC	2662 Pcs
74LVC74AD,118	NXP Semiconductors	74LVC	Active	150 MHz	5.2 ns	1.2V ~ 3.6V	-40°C ~ 125°C	14-SOIC	2100 Pcs
74LVC74AD/AUJ	NXP USA Inc.	74LVC	Active	150 MHz	5.2 ns	1.65V ~ 3.6V	-40°C ~ 125°C	14-SOIC	1114 Pcs
MC74LCX74DR2G	onsemi	74LCX	Active	150 MHz	7 ns	2V ~ 3.6V	-40°C ~ 85°C	14-SOIC	10387 Pcs
MC74LCX74DG	onsemi	74LCX	Active	150 MHz	7 ns	2V ~ 3.6V	-40°C ~ 85°C	14-SOIC	2489 Pcs
74LCX74M	Fairchild Semiconductor	74LCX	Active	150 MHz	7 ns	2V ~ 3.6V	-40°C ~ 85°C	14-SOIC	1277 Pcs

Engineering Selection Recommendations

Tier 1 - Direct Parametric Equivalents (Recommended Primary Substitutes):

SN74LVC74ADR and SN74LVC74ADT from Texas Instruments are direct parametric equivalents to the SN74LVC74ADRG4. Both maintain identical electrical specifications, supply voltage range (1.65V ~ 3.6V), propagation delay (5.2 ns @ 3.3V, 50pF), and operating temperature range (-40°C ~ 125°C). Both are Active status parts with ROHS3 compliance. The difference between these two is packaging format: SN74LVC74ADR is supplied in Cut Tape & Digi-Reel format, while SN74LVC74ADT is supplied in Tape & Reel format. Selection between these depends on procurement and assembly requirements.

Tier 2 - NXP 74LVC Series Equivalents:

74LVC74AD,118 and 74LVC74AD/AUJ from NXP Semiconductors are functionally equivalent with identical clock frequency, propagation delay, and operating temperature range. The 74LVC74AD,118 offers extended lower supply voltage operation (1.2V minimum vs. 1.65V), providing additional design flexibility for low-power applications. Both maintain the 14-SOIC package and complementary output configuration. These parts are suitable for applications where NXP supply chain preference or qualification exists.

Tier 3 - 74LCX Series Alternatives (onsemi and Fairchild):

MC74LCX74DR2G, MC74LCX74DG, and 74LCX74M represent the 74LCX logic family from onsemi and Fairchild Semiconductor. These parts maintain 150 MHz clock frequency and 14-SOIC packaging but exhibit slightly degraded propagation delay (7 ns vs. 5.2 ns) and reduced operating temperature range (-40°C ~ 85°C vs. -40°C ~ 125°C). Supply voltage minimum is 2V instead of 1.65V. These alternatives are suitable for applications where the performance margin is acceptable and onsemi or Fairchild supply chain qualification is required. MC74LCX74DR2G offers the highest inventory availability (10,387 Pcs).

Compliance and Certification:

All recommended substitutes maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited) rating, ensuring compatibility with modern manufacturing processes and long-term storage requirements.

Frequently Asked Questions (FAQ)

Q: Can I use SN74LVC74ADR as a direct replacement for SN74LVC74ADRG4?

A: Yes. SN74LVC74ADR is a direct parametric equivalent with identical electrical specifications, supply voltage range, propagation delay, operating temperature, and 14-SOIC package. The only difference is the packaging format (Cut Tape & Digi-Reel vs. the original packaging). Both are Active status parts from Texas Instruments.

Q: What is the difference between SN74LVC74ADR and SN74LVC74ADT?

A: Both are parametric equivalents with identical electrical performance. The difference is packaging format: SN74LVC74ADR is supplied in Cut Tape & Digi-Reel format, while SN74LVC74ADT is supplied in Tape & Reel format. Selection depends on your assembly process requirements.

Q: Can I use the NXP 74LVC74AD,118 in place of the SN74LVC74ADRG4?

A: Yes, with consideration for extended lower voltage capability. The 74LVC74AD,118 maintains identical clock frequency, propagation delay (5.2 ns), and operating temperature range. It offers additional design flexibility with a lower supply voltage minimum of 1.2V compared to 1.65V. The 14-SOIC package and complementary output configuration are identical.

Q: Why do the 74LCX parts (MC74LCX74DR2G, MC74LCX74DG, 74LCX74M) have different specifications?

A: The 74LCX family represents a different logic series with slightly different electrical characteristics. Propagation delay is 7 ns instead of 5.2 ns, operating temperature range is limited to -40°C ~ 85°C instead of -40°C ~ 125°C, and minimum supply voltage is 2V instead of 1.65V. These parts are functionally equivalent but with reduced performance margins. Use these only when the performance degradation is acceptable for your application.

Q: Are all substitute parts RoHS compliant?

A: Yes. All recommended substitute parts maintain ROHS3 compliance, ensuring compatibility with modern manufacturing standards and environmental regulations.

Q: What is the Moisture Sensitivity Level (MSL) for these parts?

A: All substitute parts are rated MSL 1 (Unlimited), indicating they can be stored indefinitely without moisture baking requirements and are suitable for long-term inventory management.

Q: Which substitute part has the best inventory availability?

A: MC74LCX74DR2G from onsemi has the highest inventory availability at 10,387 Pcs. However, if you require the exact parametric equivalent with no performance trade-offs, SN74LVC74ADT from Texas Instruments offers 2,662 Pcs with identical specifications.

Q: Can I mix different substitute parts in the same design?

A: Yes, provided all parts are used in identical circuit positions and your design margins accommodate the specifications of the part with the worst-case parameters. For example, if mixing 74LVC and 74LCX parts, design timing must account for the 7 ns propagation delay of the 74LCX family.

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