SN74LVC74AMPWREP Equivalent & Substitute Parts

Part Overview

The SN74LVC74AMPWREP is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments in the 74LVC series. This device features complementary outputs, positive edge triggering, and set/reset functionality, operating across a 2V to 3.6V supply range with a maximum propagation delay of 5.2ns at 3.3V with 50pF load. The part is active in production status and RoHS3 compliant. Equivalent and substitute parts are identified based on matching functional architecture, package form factor, and electrical operating parameters to ensure direct circuit compatibility.

Substiute Parts

SN74LVC74AMPWREP

Texas InstrumentsIn Stock: 845SN74LVC74AMPWREP Datasheet

Current PartRFQ

MC74LCX74DTR2G

onsemiIn Stock: 2236MC74LCX74DTR2G Datasheet

DirectRFQ

74LCX74FT

Toshiba Semiconductor and StorageIn Stock: 454074LCX74FT 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 SN74LVC74AMPWREP are qualified based on the following criteria:

Functional Equivalence: All substitute parts must be dual D-type flip-flops with complementary outputs, positive edge triggering, and set/reset capability.

Package Compatibility: All parts must use the 14-TSSOP surface mount package with identical 0.173" (4.40mm) width to ensure PCB footprint compatibility.

Electrical Parameters: Substitute parts must operate within overlapping supply voltage ranges and maintain compatible propagation delay characteristics. Output drive capability (24mA high and low) must be consistent across all qualified substitutes.

Compliance & Status: All substitute parts must maintain active production status and RoHS3 compliance to ensure long-term availability and regulatory alignment.

The following parts meet these substitution criteria: MC74LCX74DTR2G (onsemi), 74LCX74FT (Toshiba Semiconductor and Storage), 74LCX74MTCX (Fairchild Semiconductor), 74LVC74APW,118 (NXP Semiconductors), and MC74LCX74DTG (onsemi).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

74LVC74APW,118 (NXP Semiconductors) and SN74LVC74AMPWREP (Texas Instruments) both belong to the 74LVC series and share identical propagation delay specifications (5.2ns @ 3.3V, 50pF). The NXP part extends the lower supply voltage limit to 1.2V and maintains the full operating temperature range (-40°C ~ 125°C), providing enhanced flexibility for low-voltage applications while preserving timing characteristics.

Secondary Substitutes (74LCX Series):

MC74LCX74DTR2G, 74LCX74FT, 74LCX74MTCX, and MC74LCX74DTG represent the 74LCX series alternatives. These parts operate at higher clock frequencies (150 MHz versus 100 MHz) with slightly increased propagation delay (7ns @ 3.3V, 50pF). All maintain the 14-TSSOP package footprint and complementary output architecture. The 74LCX74FT (Toshiba) offers the lowest minimum supply voltage (1.65V), while 74LCX74MTCX (Fairchild) maintains the standard 2V minimum. Operating temperature ranges for 74LCX variants are limited to -40°C ~ 85°C, which may restrict use in extended temperature applications.

Compliance Considerations:

All qualified substitutes maintain RoHS3 compliance and MSL Level 1 (unlimited moisture sensitivity) ratings where specified. Parts with explicitly stated compliance certifications (MC74LCX74DTR2G, 74LCX74FT, MC74LCX74DTG) are preferred for regulated environments. The 74LCX74MTCX (Fairchild) and 74LVC74APW,118 (NXP) lack explicit RoHS3 documentation in the provided specifications but maintain active production status.

Availability & Inventory:

74LVC74APW,118 (NXP) offers the highest inventory level (56,962 pcs), followed by 74LCX74MTCX (Fairchild) at 35,625 pcs. These parts provide superior supply chain security for high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can I substitute a 74LCX series part for the original SN74LVC74AMPWREP?

A: Yes, 74LCX series parts (MC74LCX74DTR2G, 74LCX74FT, 74LCX74MTCX, MC74LCX74DTG) are functionally equivalent substitutes. Both series use identical D-type flip-flop architecture with complementary outputs and positive edge triggering in the same 14-TSSOP package. The primary differences are clock frequency (150 MHz for 74LCX versus 100 MHz for 74LVC) and propagation delay (7ns versus 5.2ns at 3.3V, 50pF). For timing-critical applications where the 5.2ns specification is required, the NXP 74LVC74APW,118 maintains this performance.

Q: What are the package compatibility requirements?

A: All substitute parts use the 14-TSSOP surface mount package with 0.173" (4.40mm) width. This ensures direct PCB footprint compatibility without layout modifications. The package designation, pin count, and physical dimensions are identical across all qualified substitutes.

Q: Are there supply voltage differences I should consider?

A: The original SN74LVC74AMPWREP operates from 2V to 3.6V. Substitute parts offer varying ranges: 74LVC74APW,118 (NXP) extends to 1.2V minimum, 74LCX74FT (Toshiba) to 1.65V minimum, while others maintain the 2V minimum. If your application requires operation below 2V, the NXP or Toshiba parts provide extended capability. For standard 3.3V or 5V logic systems, all parts are compatible.

Q: What is the operating temperature range difference?

A: The original SN74LVC74AMPWREP operates from -55°C to 125°C. Most 74LCX substitutes are limited to -40°C to 85°C. The NXP 74LVC74APW,118 maintains the full -40°C to 125°C range. For applications requiring operation below -40°C or above 85°C, verify that the selected substitute meets your temperature requirements.

Q: How do propagation delays affect circuit timing?

A: The SN74LVC74AMPWREP and NXP 74LVC74APW,118 both specify 5.2ns maximum propagation delay at 3.3V with 50pF load. The 74LCX series parts specify 7ns under identical conditions. In high-speed digital circuits where timing margins are critical, the 1.8ns difference may be significant. For standard logic applications operating below 50 MHz, this difference is typically negligible.

Q: Can I use these parts interchangeably on the same PCB?

A: Yes, all qualified substitute parts share the identical 14-TSSOP footprint and pin configuration. They can be used interchangeably on the same PCB without layout changes. However, verify that your circuit design accommodates the propagation delay and operating temperature specifications of the selected substitute.

Q: Which substitute offers the best long-term availability?

A: The NXP 74LVC74APW,118 and Fairchild 74LCX74MTCX offer the highest current inventory levels (56,962 and 35,625 pcs respectively), indicating strong supply chain availability. Both parts maintain active production status and RoHS3 compliance, supporting long-term design continuity.