74ACT174MTR Equivalent & Substitute Parts

Part Overview

The 74ACT174MTR is a D-type flip-flop logic integrated circuit manufactured by STMicroelectronics, configured as a single element with 6-bit parallel output capability. This component functions as a master reset flip-flop with positive edge triggering and non-inverted outputs. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement requirements. Substitute parts must maintain electrical compatibility across supply voltage, output drive capability, and timing characteristics while accommodating different packaging and compliance specifications.

Substiute Parts

74ACT174MTR

STMicroelectronicsIn Stock: 100574ACT174MTR Datasheet

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CD74ACT174M

Harris CorporationIn Stock: 1384CD74ACT174M Datasheet

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CD74ACT174M96

Harris CorporationIn Stock: 4337CD74ACT174M96 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACT174MTR is determined by strict adherence to the following electrical and mechanical parameters:

Critical Compatibility Parameters:

• Logic function classification (D-Type flip-flop, 1 element, 6-bit configuration)
• Trigger mechanism (positive edge triggering)
• Output polarity (non-inverted)
• Package form factor (16-SOIC with 0.154" width, 3.90mm)
• Supply voltage range (4.5V to 5.5V)
• Output drive capability (24mA minimum for both high and low states)
• Operating temperature range (−55°C to +125°C)
• Mounting technology (surface mount)

The substitute parts CD74ACT174M and CD74ACT174M96, both manufactured by Harris Corporation, satisfy all critical compatibility parameters. Both parts are classified within the 74ACT logic series and maintain identical package geometry, supply voltage specifications, output drive ratings, and operating temperature range. Differences in clock frequency (80 MHz versus 200 MHz) and propagation delay (14ns versus 10.5ns) represent performance variations that do not preclude substitution in applications where the substitute specifications meet or exceed system requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: CD74ACT174M96

The CD74ACT174M96 is the preferred substitute for the 74ACT174MTR. This part maintains full electrical and mechanical compatibility across all critical parameters. The CD74ACT174M96 is available in bulk packaging with 4,294 units in current inventory stock. While this part does not carry RoHS3 compliance, it satisfies all functional and electrical requirements for direct substitution in applications where RoHS certification is not mandated.

Secondary Substitute: CD74ACT174M

The CD74ACT174M provides equivalent functionality and is available in tube packaging with 1,319 units in inventory. This part is suitable for applications where packaging format and inventory availability align with procurement requirements. Like the CD74ACT174M96, the CD74ACT174M does not carry RoHS3 compliance.

Compliance Considerations

The 74ACT174MTR carries ROHS3 compliance certification, whereas both Harris Corporation substitutes are RoHS non-compliant. Applications subject to RoHS regulatory requirements must account for this compliance differential. Both substitute parts carry identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications, indicating equivalent export control and tariff treatment.

Performance Trade-offs

The substitute parts operate at reduced clock frequency (80 MHz versus 200 MHz) and exhibit longer propagation delay (14ns versus 10.5ns). These performance characteristics are acceptable for applications where system timing requirements do not demand the higher speed specification of the original part. Quiescent current consumption is higher in the substitutes (8 µA versus 4 µA), and input capacitance is increased (10 pF versus 4 pF). These differences must be evaluated against specific circuit design constraints.

Frequently Asked Questions (FAQ)

Q: Can CD74ACT174M and CD74ACT174M96 be used interchangeably with the 74ACT174MTR?

A: Both Harris Corporation parts satisfy all critical electrical and mechanical compatibility parameters. The primary difference is packaging format: CD74ACT174M is supplied in tube packaging, while CD74ACT174M96 is supplied in bulk. Both are functionally equivalent substitutes for the 74ACT174MTR in applications where the reduced clock frequency (80 MHz) and increased propagation delay (14ns) meet system requirements.

Q: What is the impact of the lower clock frequency specification in the substitute parts?

A: The substitute parts operate at 80 MHz maximum clock frequency compared to 200 MHz for the 74ACT174MTR. This specification difference is relevant only for applications requiring operation at frequencies exceeding 80 MHz. For applications operating at or below 80 MHz, this parameter difference does not affect functional compatibility.

Q: Are there RoHS-compliant alternatives available?

A: The provided substitute parts (CD74ACT174M and CD74ACT174M96) are not RoHS-compliant. The original 74ACT174MTR carries ROHS3 compliance. Applications requiring RoHS certification must evaluate alternative sourcing options or confirm that RoHS compliance is not a mandatory requirement for the application.

Q: How do the packaging differences affect circuit board assembly?

A: Both substitute parts are supplied in 16-SOIC surface mount packages with identical form factors (0.154" width, 3.90mm). The packaging format difference (tube versus bulk) affects only procurement and handling procedures, not circuit board assembly or electrical performance. Both parts are compatible with standard surface mount assembly equipment and processes.

Q: What is the significance of the increased quiescent current in the substitute parts?

A: The substitute parts consume 8 µA quiescent current compared to 4 µA for the 74ACT174MTR. This 2x increase is relevant only for applications with stringent power consumption requirements or extended battery operation. For standard logic circuit applications, this difference is typically negligible.

Q: Are the input capacitance differences significant for circuit design?

A: The substitute parts exhibit 10 pF input capacitance compared to 4 pF for the 74ACT174MTR. This increased capacitance may affect high-frequency signal integrity and timing margins in circuits operating near maximum clock frequency specifications. For applications operating well below the 80 MHz maximum frequency of the substitutes, this parameter difference is not significant.