DM74AS574WMX Equivalent & Substitute Parts

Part Overview

The DM74AS574WMX is an octal D-type flip-flop logic integrated circuit manufactured by onsemi, housed in a 20-SOIC surface mount package. This device functions as a standard D-type flip-flop with 8-bit parallel data storage capability and tri-state outputs. The part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support, maintenance, and production continuity.

Substiute Parts

DM74AS574WMX

onsemiIn Stock: 880DM74AS574WMX Datasheet

Current PartRFQ

SN74AS574DW

Texas InstrumentsIn Stock: 882SN74AS574DW Datasheet

DirectRFQ

SN74AS574DWR

Texas InstrumentsIn Stock: 3268SN74AS574DWR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DM74AS574WMX are qualified based on the following electrical and mechanical parameters:

• Identical base product number (74AS series)
• Matching package type (20-SOIC with 0.295", 7.50mm width)
• Equivalent D-type flip-flop architecture with 8-bit configuration
• Tri-state, non-inverted output topology
• Compatible voltage supply range (4.5V ~ 5.5V)
• Matching propagation delay specification (9ns @ 5V, 50pF)
• Positive edge trigger functionality
• Surface mount mounting type

The substitute parts identified are manufactured by Texas Instruments under the 74AS574 base product designation. These devices maintain full electrical and mechanical compatibility with the original onsemi part.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the DM74AS574WMX, the SN74AS574DWR manufactured by Texas Instruments is the primary recommended substitute. This part maintains active product status, ensuring long-term availability and supply chain stability. The SN74AS574DWR is supplied in bulk packaging and demonstrates full electrical and mechanical equivalence to the original device.

The SN74AS574DW represents an alternative substitute option, though it carries a Last Time Buy product status, indicating limited future availability. This part is supplied in tube packaging and maintains identical electrical specifications to the DM74AS574WMX.

Both Texas Instruments substitutes exceed the original clock frequency specification (90 MHz versus 80 MHz), providing enhanced performance margin. All three parts share identical propagation delay, output current ratings, supply voltage range, and quiescent current specifications, confirming direct functional interchangeability in 20-SOIC surface mount applications.

Frequently Asked Questions (FAQ)

Q: Can the SN74AS574DWR directly replace the DM74AS574WMX in existing designs?

A: Yes. Both parts share identical electrical specifications including propagation delay, output drive capability, supply voltage range, and quiescent current. The 20-SOIC package dimensions are identical, enabling direct PCB footprint compatibility without design modification.

Q: What is the significance of the higher clock frequency rating on the Texas Instruments parts?

A: The SN74AS574DW and SN74AS574DWR are rated for 90 MHz operation compared to the DM74AS574WMX at 80 MHz. This represents a performance enhancement and does not affect backward compatibility. Designs operating at or below 80 MHz will function identically with either part.

Q: Why is the SN74AS574DWR recommended over the SN74AS574DW?

A: The SN74AS574DWR maintains active product status with ongoing manufacturing and availability, while the SN74AS574DW is designated Last Time Buy. For new designs and long-term production, the active status part ensures supply continuity.

Q: Are there any compliance or certification differences between these parts?

A: The SN74AS574DW carries RoHS3 compliance certification. All three parts share REACH Unaffected status and EAR99 export classification. Moisture sensitivity level is rated as 1 (Unlimited) for the DM74AS574WMX and SN74AS574DW, while the SN74AS574DWR lists vendor undefined MSL.

Q: What packaging options are available for these substitute parts?

A: The DM74AS574WMX is supplied without specified packaging designation. The SN74AS574DW is available in tube packaging, while the SN74AS574DWR is supplied in bulk packaging. Both Texas Instruments parts use identical 20-SOIC package geometry.