74ACT573PC D-Type Transparent Latch Equivalent & Substitute Parts

Part Overview

The 74ACT573PC 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-DIP package suitable for through-hole mounting applications.

Substiute Parts

74ACT573PC

onsemiIn Stock: 119674ACT573PC Datasheet

Current PartRFQ

SN74ACT573N

Texas InstrumentsIn Stock: 2082SN74ACT573N Datasheet

DirectRFQ

CD74ACT573E

Harris CorporationIn Stock: 2214CD74ACT573E Datasheet

SimilarRFQ

TC74ACT573P(F)

Toshiba Semiconductor and StorageIn Stock: 1099TC74ACT573P(F) Datasheet

SimilarRFQ

SN74ACT573NE4

Texas InstrumentsIn Stock: 874SN74ACT573NE4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACT573PC is determined by strict adherence to the following parameters: Logic Type (D-Type Transparent Latch), Circuit Configuration (8:8), Output Type (Tri-State), Supply Voltage Range (4.5V ~ 5.5V), Independent Circuits (1), Output Current Capability (24mA minimum for both high and low states), Mounting Type (Through Hole), and Package Type (20-DIP). Substitute parts must maintain compatibility across all these electrical and mechanical specifications to ensure functional equivalence in circuit applications.

The substitute parts are categorized as follows:

Direct Manufacturer Equivalent: SN74ACT573N (Texas Instruments) — Identical electrical specifications with active product status and RoHS3 compliance.

Similar Manufacturer Equivalent: CD74ACT573E (Harris Corporation) and TC74ACT573P(F) (Toshiba Semiconductor and Storage) — Maintain core electrical parameters with minor variations in propagation delay and operating temperature ranges.

Parametric Equivalent: SN74ACT573NE4 (Texas Instruments) — Matches all critical electrical parameters with discontinued availability status.

Parameter Comparison

Engineering Selection Recommendations

For new designs and procurement, SN74ACT573N (Texas Instruments) is the primary recommended substitute. This part maintains identical electrical specifications to the 74ACT573PC, carries active product status ensuring long-term availability, and meets ROHS3 compliance requirements for modern manufacturing standards.

TC74ACT573P(F) (Toshiba Semiconductor and Storage) serves as a secondary alternative, offering active product status and RoHS compliance with marginally higher propagation delay (6.3ns versus 6ns). This part is suitable for applications where timing margins accommodate the minor delay variation.

CD74ACT573E (Harris Corporation) provides functional equivalence but carries obsolete product status and RoHS non-compliance, limiting its suitability for new designs despite superior propagation delay performance (3.1ns) and extended operating temperature range (-55°C ~ 125°C).

SN74ACT573NE4 (Texas Instruments) matches all critical electrical parameters but is discontinued at DiGi Electronics, restricting practical availability for ongoing procurement.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT573N be used as a direct replacement for 74ACT573PC in existing designs?

A: Yes. SN74ACT573N maintains identical electrical specifications including supply voltage (4.5V ~ 5.5V), propagation delay (6ns), output current (24mA), operating temperature range (-40°C ~ 85°C), and 20-DIP package configuration. Pin-for-pin compatibility is assured.

Q: What is the significance of the propagation delay difference in CD74ACT573E?

A: CD74ACT573E exhibits 3.1ns propagation delay compared to 6ns in the 74ACT573PC. This faster response time does not create compatibility issues in most applications, as the substitute performs within tighter timing specifications. However, CD74ACT573E is obsolete and RoHS non-compliant, making it unsuitable for new procurement.

Q: Are all substitute parts available in the same 20-DIP package?

A: Yes. All listed substitute parts utilize the 20-DIP (0.300", 7.62mm) through-hole package, ensuring mechanical compatibility with existing PCB layouts and socket configurations.

Q: What compliance considerations apply to substitute selection?

A: SN74ACT573N and TC74ACT573P(F) are RoHS compliant, meeting modern environmental and manufacturing standards. CD74ACT573E is RoHS non-compliant and should be avoided for new designs subject to RoHS requirements. SN74ACT573NE4 is ROHS3 compliant but discontinued.

Q: Why is the 74ACT573PC listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured by onsemi. Active alternatives from Texas Instruments and Toshiba ensure design continuity and supply chain reliability for applications requiring D-Type Transparent Latch functionality in the 74ACT series.