74F573SC Equivalent & Substitute Parts

Part Overview

The 74F573SC is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring an 8:8 circuit configuration with tri-state output capability in a 20-SOIC surface mount package. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning. The part operates within a 4.5V to 5.5V supply voltage range and is suitable for applications requiring transparent latch functionality with independent tri-state output control.

Substiute Parts

74F573SC

onsemiIn Stock: 93574F573SC Datasheet

Current PartRFQ

SN74F573DW

Texas InstrumentsIn Stock: 2234SN74F573DW Datasheet

DirectRFQ

SN74F573DWR

Texas InstrumentsIn Stock: 2576SN74F573DWR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74F573SC are qualified based on the following critical parameters that must remain consistent:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Supply Voltage Range: 4.5V ~ 5.5V
• Independent Circuits: 1
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

The substitute parts identified (SN74F573DW and SN74F573DWR) maintain identical specifications across these core parameters. Variations in propagation delay time (8.6ns versus 5.3ns) and packaging format (Tube versus Tape & Reel) do not affect functional substitution within the defined electrical and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the 74F573SC, the SN74F573DWR from Texas Instruments is the primary substitute. This part maintains active product status, ensuring long-term availability and supply chain stability. The SN74F573DWR is ROHS3 compliant and supplied in Tape & Reel format, which is standard for automated assembly operations.

The SN74F573DW serves as a secondary option, offering equivalent electrical specifications with Last Time Buy status. This part is available in Tube packaging and may be suitable for lower-volume applications or manual assembly processes.

Both Texas Instruments substitutes are electrically compatible with the 74F573SC across all critical parameters. The propagation delay difference (8.6ns versus 5.3ns) is within acceptable margins for most digital logic applications and does not constitute a functional limitation.

Frequently Asked Questions (FAQ)

Q: Can SN74F573DW and SN74F573DWR be used interchangeably with 74F573SC?

A: Yes. Both parts are electrically and mechanically equivalent. The primary difference is packaging format: SN74F573DW is supplied in Tube, while SN74F573DWR is supplied in Tape & Reel. Selection depends on assembly method and procurement volume requirements.

Q: What is the significance of the propagation delay difference (5.3ns vs. 8.6ns)?

A: The 74F573SC has a faster propagation delay specification. However, both the 74F573SC and its substitutes operate within the same logic family (74F) and voltage range. The 8.6ns delay of the Texas Instruments parts remains suitable for standard digital logic applications. Timing-critical designs should verify system-level timing requirements.

Q: Why is the 74F573SC listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured by onsemi. The Texas Instruments equivalents (SN74F573DW and SN74F573DWR) provide continued access to this functionality with active or Last Time Buy availability.

Q: Are there compliance differences between the main part and substitutes?

A: The Texas Instruments substitutes are ROHS3 compliant. The 74F573SC compliance status is not specified in the provided data. Both parts are REACH Unaffected and classified under ECCN EAR99.

Q: Which substitute should be selected for new designs?

A: SN74F573DWR is recommended for new designs due to its active product status and standard Tape & Reel packaging format, which supports modern automated assembly processes.