SN74LVC74APWG4 Equivalent & Substitute Parts

Part Overview

The SN74LVC74APWG4 is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments, housed in a 14-TSSOP surface mount 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 discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain functional equivalence across core electrical and mechanical parameters while meeting the same packaging and performance requirements.

Substiute Parts

SN74LVC74APWG4

Texas InstrumentsIn Stock: 1136SN74LVC74APWG4 Datasheet

Current PartRFQ

MC74LCX74DTR2G

onsemiIn Stock: 2236MC74LCX74DTR2G Datasheet

DirectRFQ

SN74LVC74APW

Texas InstrumentsIn Stock: 1989SN74LVC74APW Datasheet

MFR RecommendedRFQ

74LCX74MTCX

Fairchild SemiconductorIn Stock: 3565274LCX74MTCX Datasheet

MFR RecommendedRFQ

74LVC74APW,118

NXP SemiconductorsIn Stock: 5701574LVC74APW,118 Datasheet

MFR RecommendedRFQ

MC74LCX74DTG

onsemiIn Stock: 1621MC74LCX74DTG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74LVC74APWG4 are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution logic is determined by the following parameters:

Core Compatibility Parameters:

• Package / Case: 14-TSSOP (0.173", 4.40mm Width) — all substitutes must use identical package
• Type: D-Type Flip-Flop with 2 elements, 1 bit per element
• Output Type: Complementary
• Trigger Type: Positive Edge
• Clock Frequency: 150 MHz
• Current - Output High, Low: 24mA, 24mA
• Current - Quiescent (Iq): 10 µA
• Mounting Type: Surface Mount

Acceptable Parameter Variations:

• Voltage - Supply: Substitutes may have different supply voltage ranges (1.2V ~ 3.6V, 2V ~ 3.6V) provided the operating range includes the original 1.65V ~ 3.6V
• Max Propagation Delay: Substitutes with 7ns @ 3.3V, 50pF are acceptable (slower than original 5.2ns)
• Input Capacitance: Substitutes with 4pF or 7pF are acceptable (variation from original 5pF)
• Operating Temperature: Substitutes with -40°C ~ 85°C are acceptable (narrower than original -40°C ~ 125°C)

Substitutes are classified into two groups: 74LVC Series (Texas Instruments, NXP Semiconductors) and 74LCX Series (onsemi, Fairchild Semiconductor). Both series maintain functional equivalence within the specified parameter tolerances.

Parameter Comparison

Engineering Selection Recommendations

74LVC Series Substitutes (Texas Instruments, NXP Semiconductors):

SN74LVC74APW and 74LVC74APW,118 are direct functional equivalents to the SN74LVC74APWG4. Both maintain identical electrical specifications including propagation delay (5.2ns), supply voltage range (1.65V ~ 3.6V or 1.2V ~ 3.6V), and operating temperature range (-40°C ~ 125°C). Both are ROHS3 compliant and actively produced. SN74LVC74APW is available in Tube packaging, while 74LVC74APW,118 is supplied in Bulk packaging. Selection between these two depends on packaging and inventory requirements.

74LCX Series Substitutes (onsemi, Fairchild Semiconductor):

MC74LCX74DTR2G, MC74LCX74DTG, and 74LCX74MTCX are functionally compatible substitutes with acceptable parameter variations. These parts exhibit slightly longer propagation delay (7ns vs. 5.2ns) and narrower operating temperature range (-40°C ~ 85°C vs. -40°C ~ 125°C). Supply voltage range is 2V ~ 3.6V, which is narrower than the original but remains compatible with standard 3.3V and 5V logic systems. All three are actively produced and ROHS3 compliant (where specified). MC74LCX74DTR2G is supplied in Tape & Reel packaging, MC74LCX74DTG in Tube packaging, and 74LCX74MTCX in standard packaging.

Selection Criteria:

For applications requiring identical propagation delay and maximum operating temperature range, select SN74LVC74APW or 74LVC74APW,118 from the 74LVC series. For applications with relaxed timing requirements and operating temperature constraints within -40°C ~ 85°C, 74LCX series substitutes offer equivalent functionality. All substitutes maintain identical package geometry (14-TSSOP), pin configuration, and output drive capability (24mA).

Frequently Asked Questions (FAQ)

Q: Can I use a 74LCX series part as a direct replacement for the SN74LVC74APWG4?

A: Yes, 74LCX series parts (MC74LCX74DTR2G, MC74LCX74DTG, 74LCX74MTCX) are functionally compatible substitutes. The primary differences are propagation delay (7ns vs. 5.2ns) and operating temperature range (-40°C ~ 85°C vs. -40°C ~ 125°C). Verify that your application tolerates these parameter variations before selection.

Q: What is the difference between SN74LVC74APW and 74LVC74APW,118?

A: Both parts are functionally identical with the same electrical specifications. The difference is packaging: SN74LVC74APW is supplied in Tube packaging, while 74LVC74APW,118 is supplied in Bulk packaging. Selection depends on your procurement and assembly requirements.

Q: Are all substitute parts ROHS3 compliant?

A: SN74LVC74APW, 74LVC74APW,118, MC74LCX74DTR2G, MC74LCX74DTG, and 74LCX74MTCX are all ROHS3 compliant where specified in the product data. Verify compliance documentation with your supplier for specific part lots.

Q: Can I use these substitutes in applications operating above 85°C?

A: 74LCX series substitutes are rated for -40°C ~ 85°C operating temperature. For applications requiring operation above 85°C, use SN74LVC74APW or 74LVC74APW,118, which are rated to 125°C.

Q: Do all substitutes use the same 14-TSSOP package?

A: Yes, all substitute parts use the identical 14-TSSOP (0.173", 4.40mm Width) surface mount package. Pin configuration and mechanical dimensions are identical, enabling direct board-level substitution.

Q: What is the significance of the propagation delay difference between 74LVC and 74LCX series?

A: 74LVC series parts have 5.2ns propagation delay, while 74LCX series parts have 7ns propagation delay at 3.3V with 50pF load. For timing-critical applications with tight setup and hold time requirements, verify that the 7ns delay is acceptable for your circuit design before selecting 74LCX substitutes.

Q: Are there any supply voltage compatibility issues between the original part and substitutes?

A: The original SN74LVC74APWG4 operates at 1.65V ~ 3.6V. SN74LVC74APW matches this range exactly. 74LVC74APW,118 extends the lower limit to 1.2V. 74LCX series parts have a minimum supply voltage of 2V. For applications operating below 2V, use 74LVC series substitutes. For standard 3.3V and 5V logic systems, all substitutes are compatible.