SN74AHC74MPWREP Equivalent & Substitute Parts

Part Overview

The SN74AHC74MPWREP is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments, housed in a 14-TSSOP surface mount package. This device functions as a 2-element D-type flip-flop with complementary outputs, set/preset and reset capabilities, and positive edge triggering. The part is currently in Last Time Buy status, making identification of equivalent and substitute components essential for ongoing design support and procurement planning. Alternative parts must maintain functional equivalence across core logic parameters while accommodating variations in supply voltage ranges, propagation delay characteristics, and operating temperature specifications.

Substiute Parts

SN74AHC74MPWREP

Texas InstrumentsIn Stock: 12344SN74AHC74MPWREP Datasheet

Current PartRFQ

SN74LV2T74PWREP

Texas InstrumentsIn Stock: 789SN74LV2T74PWREP Datasheet

MFR RecommendedRFQ

74AHC74PW-Q100J

Nexperia USA Inc.In Stock: 300774AHC74PW-Q100J Datasheet

DirectRFQ

74VHC74FT

Toshiba Semiconductor and StorageIn Stock: 444074VHC74FT Datasheet

DirectRFQ

MC74VHC74DTR2G

onsemiIn Stock: 5735MC74VHC74DTR2G Datasheet

DirectRFQ

NLV74VHC74DTR2G

onsemiIn Stock: 3676NLV74VHC74DTR2G Datasheet

UpgradeRFQ

74AHC74PW,118

Nexperia USA Inc.In Stock: 1168574AHC74PW,118 Datasheet

MFR RecommendedRFQ

74AHCT74PW,118

NXP SemiconductorsIn Stock: 1031274AHCT74PW,118 Datasheet

MFR RecommendedRFQ

74VHC74MTCX

Fairchild SemiconductorIn Stock: 2058574VHC74MTCX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74AHC74MPWREP is determined by strict adherence to the following core parameters:

Mandatory Equivalence Criteria:

• D-type flip-flop architecture with dual elements (2 flip-flops per package)
• Complementary output configuration
• Positive edge trigger mechanism
• 14-TSSOP surface mount package (0.173", 4.40mm width)
• Set/Preset and Reset functionality

Allowable Variation Parameters:

• Clock frequency: 59.4 MHz minimum (lower acceptable for timing-non-critical applications)
• Propagation delay: up to 11.2 ns @ 5V, 50pF (within acceptable timing margins)
• Supply voltage range: 1.6 V to 5.5 V (wider ranges acceptable; narrower ranges require application verification)
• Operating temperature: −55°C to +125°C (narrower ranges acceptable if application requirements are met)
• Input capacitance: 2 pF to 4 pF (minor variation acceptable)
• Output current: 8 mA (consistent across all substitutes)

Non-Substitutable Parameters:

• Package type and pinout (14-TSSOP mandatory)
• Logic family series (74AHC, 74LV, 74VHC, 74AHCT acceptable within functional constraints)
• Element count and bit configuration

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Highest Compatibility):

74AHC74PW,118 and 74AHC74PW-Q100J are direct substitutes within the 74AHC logic family. Both maintain identical clock frequency (115 MHz), propagation delay (9.3 ns @ 5V, 50pF), supply voltage range (2.0–5.5 V), and output current specifications. The 74AHC74PW,118 is in Active status with standard commercial temperature range (−40 to +125°C). The 74AHC74PW-Q100J carries AEC-Q100 automotive qualification and operates over −40 to +125°C, suitable for applications requiring automotive-grade components.

Functional Equivalents (Same Logic Family, Extended Temperature):

MC74VHC74DTR2G (onsemi) and 74VHC74FT (Toshiba) provide functional equivalence with identical electrical performance (115 MHz, 9.3 ns propagation delay, 2.0–5.5 V supply). MC74VHC74DTR2G extends the operating temperature to −55 to +125°C, matching the original part's full temperature range. 74VHC74FT operates −40 to +85°C, suitable for standard industrial applications. Both are in Active status.

Lower-Speed Alternative:

SN74LV2T74PWREP (Texas Instruments) operates at reduced clock frequency (59.4 MHz) with slightly increased propagation delay (11.2 ns @ 5V, 50pF). This part is suitable for applications where timing margins permit lower performance, offering extended supply voltage range (1.6–5.5 V) and full temperature coverage (−55 to +125°C). Active status ensures long-term availability.

Restricted Substitution:

74AHCT74PW,118 (NXP Semiconductors) operates only within 4.5–5.5 V supply range, restricting use to 5 V systems. This part is not suitable for applications requiring 2 V to 3.3 V operation. Higher clock frequency (140 MHz) and faster propagation delay (8.8 ns) may introduce timing complications in designs optimized for the original part's specifications.

Obsolete Status:

NLV74VHC74DTR2G is marked Obsolete and should not be selected for new designs or long-term procurement despite functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can I use 74AHCT74PW,118 as a direct replacement for SN74AHC74MPWREP?

A: No. The 74AHCT74PW,118 operates only at 4.5–5.5 V supply voltage, whereas the SN74AHC74MPWREP supports 2.0–5.5 V. Use this part only in applications confirmed to operate exclusively at 5 V. Additionally, the faster propagation delay (8.8 ns vs. 9.3 ns) may affect timing-critical designs.

Q: What is the difference between 74AHC74PW,118 and 74AHC74PW-Q100J?

A: Both are 74AHC logic family parts with identical electrical specifications. The 74AHC74PW-Q100J carries AEC-Q100 automotive qualification and is graded for automotive applications. Select 74AHC74PW-Q100J for automotive or mission-critical applications; use 74AHC74PW,118 for standard commercial applications.

Q: Is SN74LV2T74PWREP suitable for high-speed applications?

A: No. The SN74LV2T74PWREP operates at 59.4 MHz clock frequency with 11.2 ns propagation delay, compared to 115 MHz and 9.3 ns for the original part. Use this part only in applications where lower speed is acceptable and the extended supply voltage range (1.6–5.5 V) provides design advantage.

Q: Can I use parts with narrower operating temperature ranges?

A: Yes, if your application operates within the narrower range. For example, 74VHC74FT and 74AHC74PW,118 operate −40 to +85°C and −40 to +125°C respectively. Verify that your system's actual operating environment falls within the selected part's temperature specification.

Q: Are all substitute parts in the same 14-TSSOP package?

A: Yes. All listed substitutes use the 14-TSSOP (0.173", 4.40mm width) surface mount package with identical pinout, ensuring direct PCB compatibility without layout modifications.

Q: Why should I avoid NLV74VHC74DTR2G?

A: NLV74VHC74DTR2G is marked Obsolete. Although functionally equivalent, obsolete parts face uncertain long-term availability and may incur supply chain complications. Select Active-status alternatives for new designs and ongoing production.

Q: What is the primary difference between 74AHC and 74VHC logic families?

A: Both families provide equivalent D-type flip-flop functionality with identical clock frequency (115 MHz) and propagation delay (9.3 ns). The primary difference is manufacturer and internal circuit implementation. Both are functionally interchangeable for this application.