SN74AC574PWR Equivalent & Substitute Parts

Part Overview

The SN74AC574PWR is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit positive edge triggering in a 20-TSSOP surface mount package. This part is classified as Active status and is ROHS3 compliant. Substitute parts are necessary when the original manufacturer part is unavailable, when alternative packaging formats are required for production workflows, or when sourcing from different manufacturers is preferred for supply chain optimization.

Substiute Parts

SN74AC574PWR

Texas InstrumentsIn Stock: 3868SN74AC574PWR Datasheet

Current PartRFQ

MC74AC374DTR2G

onsemiIn Stock: 3574MC74AC374DTR2G Datasheet

MFR RecommendedRFQ

MC74AC377DTG

onsemiIn Stock: 782MC74AC377DTG Datasheet

MFR RecommendedRFQ

MC74AC377DTR2G

onsemiIn Stock: 3640MC74AC377DTR2G Datasheet

MFR RecommendedRFQ

MC74AC574DTR2G

onsemiIn Stock: 17818MC74AC574DTR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74AC574PWR are qualified based on the following criteria:

Functional Equivalence: All substitute parts maintain the same D-Type flip-flop architecture with 1 element, 8-bit configuration, positive edge triggering, and tri-state non-inverted output topology.

Electrical Compatibility: Substitute parts operate within the same voltage supply range (2V ~ 6V), maintain compatible output drive capabilities (24 mA / 24 mA), and support the same operating temperature range (-40°C ~ 85°C).

Package Compatibility: All substitute parts use the 20-TSSOP (0.173", 4.40mm Width) surface mount package, ensuring mechanical and electrical pin compatibility.

Series Alignment: All substitute parts belong to the 74AC logic series, maintaining consistent logic family characteristics.

Compliance Equivalence: All substitute parts are ROHS3 compliant with MSL rating of 1 (Unlimited), matching the original part's environmental and regulatory status.

Packaging Format Variations: Substitute parts are available in different packaging formats (Cut Tape, Tape & Reel, Tube) to accommodate different procurement and assembly workflows.

Parameter Comparison

Engineering Selection Recommendations

MC74AC574DTR2G (onsemi, Tape & Reel): Direct functional equivalent to SN74AC574PWR with identical base product number (74AC574), tri-state output configuration, and 9.5 ns propagation delay. Suitable for high-volume production requiring tape and reel packaging. Quiescent current is 8 µA compared to 4 µA in the original part. Clock frequency is 95 MHz versus 153 MHz in the original part.

MC74AC374DTR2G (onsemi, Cut Tape): Functionally equivalent D-Type flip-flop with tri-state output, 9.5 ns propagation delay, and 155 MHz clock frequency. Available in cut tape packaging. Quiescent current is 8 µA. Suitable for applications where cut tape format is preferred for assembly workflows.

MC74AC377DTR2G (onsemi, Tape & Reel): D-Type flip-flop with non-inverted output (non-tri-state configuration). Clock frequency is 140 MHz with 10 ns propagation delay. Quiescent current is 8 µA. Suitable for applications not requiring tri-state output capability. Available in tape and reel format.

MC74AC377DTG (onsemi, Tube): D-Type flip-flop with non-inverted output configuration. Clock frequency is 140 MHz with 10 ns propagation delay. Quiescent current is 8 µA. Available in tube packaging format. Suitable for lower-volume applications or when tube packaging is required for specific assembly processes.

All substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory and environmental equivalence to the original SN74AC574PWR part.

Frequently Asked Questions (FAQ)

Q: Can MC74AC574DTR2G be used as a direct replacement for SN74AC574PWR?

A: MC74AC574DTR2G is functionally equivalent with the same base product number (74AC574), identical tri-state output configuration, and matching 9.5 ns propagation delay. Both operate within 2V ~ 6V supply range and -40°C ~ 85°C temperature range. The primary difference is packaging format (tape and reel versus cut tape) and quiescent current specification (8 µA versus 4 µA). Pin configuration and electrical functionality are compatible.

Q: What is the difference between MC74AC574DTR2G and MC74AC377DTR2G?

A: MC74AC574DTR2G features tri-state output capability, while MC74AC377DTR2G provides non-inverted output without tri-state functionality. MC74AC574DTR2G has a clock frequency of 95 MHz, while MC74AC377DTR2G operates at 140 MHz. Both share the same 20-TSSOP package, 8-bit configuration, and positive edge triggering. Selection depends on whether tri-state output control is required in the application.

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

A: All substitute parts use the 20-TSSOP (0.173", 4.40mm Width) surface mount package, ensuring mechanical and electrical pin compatibility. However, packaging formats differ: MC74AC574DTR2G and MC74AC377DTR2G are available in tape and reel format, MC74AC374DTR2G in cut tape format, and MC74AC377DTG in tube format. These format variations do not affect electrical compatibility but impact procurement and assembly workflows.

Q: What are the key electrical differences between the original part and substitutes?

A: The original SN74AC574PWR specifies 4 µA quiescent current and 153 MHz clock frequency. All onsemi substitute parts specify 8 µA quiescent current. Clock frequencies vary: MC74AC574DTR2G operates at 95 MHz, MC74AC374DTR2G at 155 MHz, and MC74AC377 variants at 140 MHz. Propagation delays are 9.5 ns for 74AC574 and 74AC374 variants, and 10 ns for 74AC377 variants. All parts maintain identical voltage supply range (2V ~ 6V) and output drive capability (24 mA / 24 mA).

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant with MSL rating of 1 (Unlimited), matching the environmental and regulatory status of the original SN74AC574PWR part.

Q: Which substitute should be selected for high-volume production?

A: MC74AC574DTR2G in tape and reel format is optimized for high-volume production workflows. MC74AC377DTR2G is also available in tape and reel format. Both maintain Active product status and full compliance specifications. Selection between these two depends on whether tri-state output functionality is required in the application circuit.