74ACT573MTC D-Type Transparent Latch Equivalent & Substitute Parts

Part Overview

The 74ACT573MTC is a D-Type Transparent Latch IC manufactured by onsemi, featuring 1 channel with 8:8 circuit configuration and tri-state output capability. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates within a 4.5V to 5.5V supply voltage range and is housed in a 20-TSSOP surface mount package.

Substiute Parts

74ACT573MTC

onsemiIn Stock: 73874ACT573MTC Datasheet

Current PartRFQ

MC74ACT573DTR2G

onsemiIn Stock: 3144MC74ACT573DTR2G Datasheet

DirectRFQ

SN74ACT573PWR

Texas InstrumentsIn Stock: 10256SN74ACT573PWR Datasheet

DirectRFQ

SN74ACT573DBR

Texas InstrumentsIn Stock: 3186SN74ACT573DBR Datasheet

SimilarRFQ

SN74ACT573PW

Texas InstrumentsIn Stock: 2147SN74ACT573PW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACT573MTC is determined by the following critical parameters: logic type (D-Type Transparent Latch), output type (tri-state), supply voltage range (4.5V ~ 5.5V), independent circuits (1), output current capability (24mA high and low), operating temperature range (-40°C ~ 85°C), and package compatibility (20-TSSOP or equivalent footprint).

The substitute parts are grouped into three categories based on their relationship to the main part:

Direct Manufacturer Substitutes: Parts that maintain identical or functionally equivalent electrical specifications with the same base product number (74ACT573) from the same or alternative manufacturers.

Similar Substitutes: Parts with the same logic function and electrical performance but housed in a related package variant (20-SSOP vs. 20-TSSOP).

Parametric Equivalents: Parts with matching electrical characteristics and the same package type but with different product status or packaging format.

Parameter Comparison

Engineering Selection Recommendations

SN74ACT573PWR (Texas Instruments) is the primary recommended substitute for the 74ACT573MTC. This part maintains identical electrical specifications including 6ns propagation delay, 24mA output current, and 20-TSSOP package footprint. The part is currently active in production with ROHS3 compliance certification, ensuring long-term availability and regulatory alignment.

SN74ACT573DBR (Texas Instruments) serves as an alternative substitute with equivalent electrical performance. The primary distinction is the 20-SSOP package variant (0.209", 5.30mm width) compared to the 20-TSSOP package. This part is active in production with ROHS3 compliance. PCB layout modifications are required to accommodate the different package footprint.

MC74ACT573DTR2G (onsemi) is available as an active production alternative from the original manufacturer. This part differs in circuit configuration (1:8 versus 8:8) and exhibits a longer propagation delay of 10.5ns compared to the 6ns specification of the main part. This substitute is suitable only for applications where the circuit configuration change and increased delay are functionally acceptable.

SN74ACT573PW (Texas Instruments) is a parametric equivalent with matching electrical specifications and 20-TSSOP package compatibility. However, this part is discontinued at DiGi Electronics, limiting procurement viability for new designs.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT573DBR be used as a direct replacement for 74ACT573MTC without PCB modifications?

A: No. While SN74ACT573DBR maintains identical electrical specifications, the package footprint differs (20-SSOP versus 20-TSSOP). The 20-SSOP package has a larger width (5.30mm versus 4.40mm), requiring PCB layout changes. Pin-to-pin compatibility exists, but physical placement must be verified against the updated package dimensions.

Q: What is the significance of the circuit configuration difference between 74ACT573MTC (8:8) and MC74ACT573DTR2G (1:8)?

A: Circuit configuration defines the input-to-output relationship. The 8:8 configuration indicates 8 independent data inputs and 8 independent outputs. The 1:8 configuration indicates 1 data input with 8 outputs. This functional difference means MC74ACT573DTR2G is suitable only for applications where a single input driving multiple outputs is acceptable.

Q: Why does MC74ACT573DTR2G have a 10.5ns propagation delay compared to 6ns for other substitutes?

A: Propagation delay is determined by the internal circuit design and manufacturing process. The 10.5ns specification for MC74ACT573DTR2G reflects its specific design implementation. Applications with strict timing requirements must account for this increased delay.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. SN74ACT573PWR, SN74ACT573DBR, and SN74ACT573PW are all ROHS3 compliant. The original 74ACT573MTC does not specify RoHS status. All substitute parts meet current environmental and regulatory requirements.

Q: What is the moisture sensitivity level, and does it affect substitution?

A: All parts, including the main part and all substitutes, have Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions. This parameter does not differentiate substitution eligibility.

Q: Which substitute offers the best long-term availability?

A: SN74ACT573PWR from Texas Instruments is recommended for long-term availability. This part is currently active in production with 10,200 pieces in stock and ROHS3 compliance certification, supporting sustained procurement for ongoing production and design support.