74ACT574MTCX Equivalent & Substitute Parts

Part Overview

The 74ACT574MTCX is a D-type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit parallel data storage capability. This device operates as a positive edge-triggered flip-flop with tri-state, non-inverted outputs in a 20-TSSOP surface mount package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Substiute Parts

74ACT574MTCX

onsemiIn Stock: 191374ACT574MTCX Datasheet

Current PartRFQ

MC74ACT574DTR2G

onsemiIn Stock: 3575MC74ACT574DTR2G Datasheet

DirectRFQ

SN74ACT574PW

Texas InstrumentsIn Stock: 1303SN74ACT574PW Datasheet

DirectRFQ

74AHCT574PW,118

Nexperia USA Inc.In Stock: 142674AHCT574PW,118 Datasheet

SimilarRFQ

SN74ACT574DBR

Texas InstrumentsIn Stock: 2034SN74ACT574DBR Datasheet

SimilarRFQ

SN74ACT574PWR

Texas InstrumentsIn Stock: 2430SN74ACT574PWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74ACT574MTCX are classified based on the following substitution criteria:

Direct Manufacturer Substitutes maintain identical electrical and mechanical specifications within allowed tolerances:

• Same series designation (74ACT)
• Identical package type (20-TSSOP)
• Matching functional parameters: 8-bit D-type flip-flop, positive edge trigger, tri-state non-inverted outputs
• Supply voltage range: 4.5V ~ 5.5V
• Operating temperature: -40°C ~ 85°C
• Clock frequency: 110 MHz nominal
• Propagation delay: 11 ns @ 5V, 50pF

Similar Series Substitutes operate within the same logic family but with different series designation (74AHCT):

• Functionally equivalent D-type flip-flop architecture
• Same 8-bit configuration and tri-state output
• Positive edge trigger operation
• 20-TSSOP package compatibility
• Extended operating temperature range (-40°C ~ 125°C)
• Improved performance characteristics (faster propagation delay, lower quiescent current)

Package Variant Substitutes maintain electrical equivalence with alternative package geometry:

• 20-SSOP package (0.209", 5.30mm Width) instead of 20-TSSOP
• Identical electrical specifications and functional behavior
• Different physical footprint requiring PCB layout adjustment

Parameter Comparison

Engineering Selection Recommendations

MC74ACT574DTR2G (onsemi) is the primary direct substitute for the 74ACT574MTCX. This part maintains identical electrical specifications and 20-TSSOP package geometry. The device is currently in active production status, ensuring long-term availability. RoHS3 compliance and unlimited moisture sensitivity rating match the original specification requirements. The lower quiescent current (8 µA vs. 40 µA) provides improved power efficiency without affecting functional compatibility.

SN74ACT574PWR (Texas Instruments) serves as a parametric equivalent with superior propagation delay performance (7 ns vs. 11 ns @ 5V, 50pF). This part is actively produced and RoHS3 compliant. The improved timing characteristics make this suitable for applications requiring faster data transfer rates while maintaining full electrical and mechanical compatibility with the original 74ACT574MTCX footprint.

SN74ACT574PW (Texas Instruments) provides direct functional equivalence in tube packaging. Although discontinued at DiGi Electronics, this part maintains identical electrical specifications and 20-TSSOP package compatibility. Current inventory availability is documented at 1271 pieces.

74AHCT574PW,118 (Nexperia USA Inc.) represents a similar series substitute within the 74AHCT logic family. This device offers extended operating temperature range (-40°C ~ 125°C) and improved performance metrics including faster propagation delay (10.6 ns) and lower output current (8 mA vs. 24 mA). The 74AHCT series is functionally compatible but operates with different electrical characteristics. Selection of this part requires verification that the lower output drive current and extended temperature range align with system requirements.

SN74ACT574DBR (Texas Instruments) provides electrical equivalence with a package variant (20-SSOP, 0.209" width vs. 20-TSSOP, 0.173" width). This part is actively produced and RoHS3 compliant. PCB layout modification is required to accommodate the different package footprint, but electrical functionality remains identical to the original specification.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT574DTR2G directly replace 74ACT574MTCX without design changes?

A: Yes. MC74ACT574DTR2G maintains identical electrical specifications, package type (20-TSSOP), and functional behavior. The part is pin-compatible and requires no circuit modifications. The lower quiescent current provides additional benefit without affecting system operation.

Q: What is the difference between 74ACT and 74AHCT series substitutes?

A: Both series implement D-type flip-flop logic with identical functional architecture. The 74AHCT series (represented by 74AHCT574PW,118) operates with lower output drive current (8 mA vs. 24 mA), lower quiescent current (4 µA), and extended temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C). Electrical compatibility is maintained across the supply voltage range (4.5V ~ 5.5V), but output current capability differs. Selection depends on whether the application requires the higher drive current of the 74ACT series.

Q: Can SN74ACT574DBR be used as a direct substitute despite the different package?

A: SN74ACT574DBR is electrically equivalent but uses a 20-SSOP package (0.209" width) instead of the 20-TSSOP package (0.173" width) of the original part. PCB footprint modification is required. Pin configuration and electrical specifications remain identical, making this a viable substitute if layout changes are acceptable.

Q: Why does SN74ACT574PWR show faster propagation delay (7 ns vs. 11 ns)?

A: SN74ACT574PWR is specified with 7 ns maximum propagation delay at 5V with 50 pF load, compared to 11 ns for the original 74ACT574MTCX. This represents improved performance within the same 74ACT series. The faster timing is a parametric advantage and does not affect backward compatibility. Applications with timing-critical paths benefit from this improved specification.

Q: Are all substitute parts RoHS3 compliant?

A: All active production substitutes (MC74ACT574DTR2G, SN74ACT574PWR, 74AHCT574PW,118, SN74ACT574DBR) are RoHS3 compliant. The original 74ACT574MTCX does not specify RoHS status. All parts maintain unlimited moisture sensitivity level (MSL 1), indicating no special handling requirements during storage or assembly.

Q: What is the recommended substitute for new designs?

A: For new designs requiring the 74ACT574 function, MC74ACT574DTR2G or SN74ACT574PWR are recommended. Both are actively produced, RoHS3 compliant, and maintain full compatibility with the original specification. SN74ACT574PWR offers superior propagation delay performance if timing margins are critical.