74AC574MTC Equivalent & Substitute Parts

Part Overview

The 74AC574MTC is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit capacity and positive edge triggering. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement continuity. The 74AC574 series provides tri-state, non-inverted output configuration suitable for digital logic applications requiring edge-triggered data storage and output control.

Substiute Parts

74AC574MTC

onsemiIn Stock: 77074AC574MTC Datasheet

Current PartRFQ

MC74AC574DTR2G

onsemiIn Stock: 17818MC74AC574DTR2G Datasheet

DirectRFQ

SN74AC564PW

Texas InstrumentsIn Stock: 920SN74AC564PW Datasheet

DirectRFQ

SN74AC574PWR

Texas InstrumentsIn Stock: 3868SN74AC574PWR Datasheet

DirectRFQ

SN74AC574DBR

Texas InstrumentsIn Stock: 1035SN74AC574DBR Datasheet

SimilarRFQ

SN74AC574PW

Texas InstrumentsIn Stock: 898SN74AC574PW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74AC574MTC are classified based on strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• D-Type flip-flop architecture with 1 element, 8-bit configuration
• Positive edge trigger mechanism
• Tri-state output capability
• Voltage supply range: 2V ~ 6V
• Operating temperature: -40°C ~ 85°C
• Output current: 24 mA (high and low)
• Propagation delay: 9.5 ns @ 5V, 50pF
• Input capacitance: 4.5 pF

Package Compatibility:

• Direct substitutes maintain 20-TSSOP (0.173", 4.40mm Width) package
• Similar substitutes use 20-SSOP (0.209", 5.30mm Width) package with identical electrical specifications

Output Configuration:

• Direct and parametric equivalents: Tri-State, Non-Inverted output
• Functional alternative: SN74AC564PW features Tri-State, Inverted output (different logic inversion)

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Recommended for Obsolete Part Replacement):

MC74AC574DTR2G and SN74AC574PWR are active product alternatives with identical electrical specifications to the 74AC574MTC. Both maintain the 20-TSSOP package footprint, tri-state non-inverted output configuration, and core functional parameters. MC74AC574DTR2G is supplied in Tape & Reel packaging with RoHS3 compliance. SN74AC574PWR is supplied in Cut Tape & Digi-Reel packaging with RoHS3 compliance. Both parts support the full voltage supply range and operating temperature specifications.

Parametric Equivalent (Package Variant):

SN74AC574DBR provides electrical equivalence with a package variant (20-SSOP vs. 20-TSSOP). This part is active and RoHS3 compliant. Selection requires PCB layout compatibility with the 20-SSOP footprint (0.209" width vs. 0.173" width).

Functional Alternative (Output Inversion):

SN74AC564PW features inverted tri-state output logic compared to the 74AC574MTC. This part is discontinued at DiGi Electronics and exhibits slightly higher propagation delay (10.5 ns vs. 9.5 ns). Selection requires circuit-level verification of inverted output compatibility.

Compliance Status:

All active substitute parts (MC74AC574DTR2G, SN74AC574PWR, SN74AC574DBR) carry RoHS3 compliance and REACH Unaffected status, meeting modern regulatory requirements for the 74AC logic family.

Frequently Asked Questions (FAQ)

Q: Can MC74AC574DTR2G directly replace 74AC574MTC in existing designs?

A: Yes. MC74AC574DTR2G maintains identical electrical specifications including clock frequency (153 MHz), propagation delay (9.5 ns @ 5V, 50pF), output configuration (tri-state, non-inverted), and 20-TSSOP package footprint. The primary difference is product status (active vs. obsolete) and lower quiescent current (8 µA vs. 40 µA), which is advantageous for power consumption.

Q: What is the difference between SN74AC574PWR and SN74AC574PW?

A: Both parts are electrically identical with matching clock frequency (153 MHz), propagation delay (9.5 ns), and 20-TSSOP package. The difference is packaging format: SN74AC574PWR is supplied in Cut Tape & Digi-Reel, while SN74AC574PW is supplied in Tube. SN74AC574PWR is active; SN74AC574PW is discontinued at DiGi Electronics.

Q: Can SN74AC574DBR be used as a direct PCB replacement?

A: SN74AC574DBR is electrically equivalent but uses a different package (20-SSOP vs. 20-TSSOP). The 20-SSOP package is wider (0.209" vs. 0.173"), requiring PCB footprint verification before substitution. Electrical performance and output configuration are identical.

Q: Why does SN74AC564PW have different specifications?

A: SN74AC564PW is a functional alternative with inverted tri-state output logic (vs. non-inverted in 74AC574MTC). Clock frequency is lower (95 MHz vs. 153 MHz) and propagation delay is higher (10.5 ns vs. 9.5 ns). This part requires circuit-level design verification to confirm inverted output compatibility.

Q: Which substitute part has the lowest power consumption?

A: SN74AC574PWR and SN74AC574DBR both feature quiescent current of 4 µA, compared to 40 µA for the obsolete 74AC574MTC. MC74AC574DTR2G has 8 µA quiescent current. All three active alternatives provide improved power efficiency.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts (MC74AC574DTR2G, SN74AC574PWR, SN74AC574DBR) are RoHS3 compliant. Discontinued parts (SN74AC574PW, SN74AC564PW) also carry RoHS3 compliance. All parts are REACH Unaffected.