74ACT573MTCX D-Type Transparent Latch Equivalent & Substitute Parts

Part Overview

The 74ACT573MTCX is a D-Type Transparent Latch IC manufactured by onsemi, featuring an 8:8 circuit configuration with tri-state output capability in a 20-TSSOP surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The 74ACT573 series provides a single-channel transparent latch function suitable for digital logic applications requiring data storage and output control. The tri-state output enables bus-oriented system architectures.

Substiute Parts

74ACT573MTCX

onsemiIn Stock: 111774ACT573MTCX Datasheet

Current PartRFQ

MC74ACT573DTR2G

onsemiIn Stock: 3144MC74ACT573DTR2G Datasheet

DirectRFQ

SN74ACT573PW

Texas InstrumentsIn Stock: 2147SN74ACT573PW Datasheet

DirectRFQ

74AHCT573PW,118

Nexperia USA Inc.In Stock: 160074AHCT573PW,118 Datasheet

SimilarRFQ

SN74ACT573DBR

Texas InstrumentsIn Stock: 3186SN74ACT573DBR Datasheet

SimilarRFQ

SN74ACT573PWR

Texas InstrumentsIn Stock: 10256SN74ACT573PWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74ACT573MTCX is determined by the following critical parameters:

Primary Substitution Criteria:

• Logic type: D-Type Transparent Latch
• Circuit configuration: 8:8
• Output type: Tri-State
• Supply voltage range: 4.5V ~ 5.5V
• Package type: 20-TSSOP
• Propagation delay: 6ns (or faster)
• Output current capability: 24mA minimum (High and Low)

Substitution Categories:

Direct Manufacturer Equivalents maintain identical electrical specifications and package footprint, differing only in manufacturer or packaging format.

Similar Parts share the same logic function and package but may have different circuit configurations (1:8 vs. 8:8), propagation delays, or output current ratings. These require design verification for compatibility.

Parametric Equivalents provide identical electrical and mechanical specifications with different packaging or supplier formats.

Parameter Comparison

Engineering Selection Recommendations

Recommended Primary Substitute: SN74ACT573PWR

The SN74ACT573PWR from Texas Instruments is the optimal replacement for the obsolete 74ACT573MTCX. This part maintains identical electrical specifications (6ns propagation delay, 24mA output current) and package footprint (20-TSSOP). The part is currently in active production status with ROHS3 compliance certification and 10,200 units available in inventory. No design modifications are required for direct substitution.

Alternative Direct Equivalent: SN74ACT573PW

The SN74ACT573PW provides identical electrical and mechanical specifications to the main part. Although discontinued at DiGi Electronics, it remains available through alternative distribution channels with 2,080 units in stock. This part is suitable for applications where supply chain continuity is not a primary concern.

Package Variant: SN74ACT573DBR

The SN74ACT573DBR maintains identical electrical performance but uses a 20-SSOP package (0.209", 5.30mm width) instead of 20-TSSOP. This part is suitable only if PCB layout accommodates the wider package footprint. The part is in active production with 3,130 units available.

Performance-Enhanced Alternative: 74AHCT573PW,118

The 74AHCT573PW,118 from Nexperia offers improved propagation delay (4.6ns versus 6ns) and operates across an extended temperature range (-40°C to 125°C). However, output current is reduced to 8mA per channel. This part is suitable only for applications where reduced output current is acceptable and faster switching performance is beneficial.

Not Recommended: MC74ACT573DTR2G

The MC74ACT573DTR2G differs in circuit configuration (1:8 versus 8:8) and has slower propagation delay (10.5ns). This part is not suitable as a direct substitute without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can I use SN74ACT573PWR as a direct replacement for 74ACT573MTCX without PCB modifications?

A: Yes. The SN74ACT573PWR is a parametric equivalent with identical electrical specifications and 20-TSSOP package footprint. No design changes are required.

Q: What is the difference between 20-TSSOP and 20-SSOP packages?

A: The 20-TSSOP package has a width of 0.173" (4.40mm), while the 20-SSOP package is wider at 0.209" (5.30mm). Both packages have the same pin count and pitch. The SN74ACT573DBR in 20-SSOP requires verification that PCB layout can accommodate the wider footprint.

Q: Why is MC74ACT573DTR2G listed as a substitute if the circuit configuration differs?

A: The MC74ACT573DTR2G is listed as a similar part within the 74ACT573 family but is not recommended as a direct substitute due to its 1:8 circuit configuration versus the required 8:8 configuration. Circuit redesign would be necessary.

Q: Is the 74AHCT573PW,118 compatible with my existing design?

A: The 74AHCT573PW,118 is compatible only if your application can tolerate reduced output current (8mA versus 24mA per channel). The faster propagation delay (4.6ns) is beneficial but not required for compatibility. Verify that downstream logic can operate with the reduced drive current.

Q: What is the difference between Cut Tape and Tube packaging for SN74ACT573PWR?

A: Cut Tape (CT) & Digi-Reel packaging is suitable for automated assembly processes, while Tube packaging is typically used for manual assembly or lower-volume applications. Both formats contain the same component with identical electrical specifications.

Q: Are all substitute parts ROHS3 compliant?

A: The 74ACT573MTCX does not specify RoHS compliance status. All recommended substitutes (SN74ACT573PWR, SN74ACT573PW, SN74ACT573DBR, MC74ACT573DTR2G, and 74AHCT573PW,118) are ROHS3 compliant.