DM74ALS533WM Equivalent & Substitute Parts

Part Overview

The DM74ALS533WM is a D-Type Transparent Latch IC with 8:8 multiplexing capability, manufactured by onsemi in a 20-SOIC surface mount package. This component features tri-state output configuration and operates within the 4.5V to 5.5V supply voltage range, making it suitable for digital logic applications requiring transparent latch functionality.

The DM74ALS533WM is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or repair requirements for systems utilizing this logic IC.

Substiute Parts

DM74ALS533WM

onsemiIn Stock: 1154DM74ALS533WM Datasheet

Current PartRFQ

SN74ALS533ADW

Texas InstrumentsIn Stock: 2012SN74ALS533ADW Datasheet

DirectRFQ

SN74ALS533ANSR

Texas InstrumentsIn Stock: 933SN74ALS533ANSR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DM74ALS533WM are qualified based on the following critical parameters that determine functional and physical compatibility:

Functional Parameters:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Supply Voltage Range: 4.5V ~ 5.5V
• Operating Temperature Range: 0°C ~ 70°C
• Independent Circuits: 1

Physical Parameters:

• Mounting Type: Surface Mount
• Package Type: 20-SOIC or equivalent 20-pin DIP variant
• Series: 74ALS

The substitute parts identified maintain these core parameters. Variations in propagation delay time (4ns to 6ns) and package width dimensions remain within acceptable tolerance for the 74ALS logic family and do not affect functional substitution capability.

Parameter Comparison

Engineering Selection Recommendations

SN74ALS533ADW (Direct Substitute - Recommended)

The SN74ALS533ADW is the primary substitute for the DM74ALS533WM. Both parts share identical package dimensions (20-SOIC, 0.295" width), electrical specifications, and operating parameters. The SN74ALS533ADW is manufactured by Texas Instruments with Active product status, ensuring long-term availability. This part is ROHS3 compliant and maintains the same MSL rating. The propagation delay increase from 4ns to 6ns remains within acceptable tolerance for 74ALS logic family applications.

SN74ALS533ANSR (Similar Substitute - Package Consideration)

The SN74ALS533ANSR provides functional equivalence with identical electrical characteristics. However, this part features a narrower package width (0.209" versus 0.295"), classified as 20-SO rather than 20-SOIC. This dimensional difference may require PCB layout verification before implementation. The part is supplied in Tape & Reel packaging and maintains Active product status with ROHS3 compliance.

Selection between these substitutes depends on PCB footprint compatibility and packaging requirements. Both parts satisfy the functional and electrical requirements of the DM74ALS533WM.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS533ADW directly replace the DM74ALS533WM without PCB modifications?

A: Yes. The SN74ALS533ADW maintains identical package dimensions (20-SOIC, 0.295" width), pin configuration, and electrical specifications. Direct substitution on existing PCBs is possible without layout changes.

Q: What is the significance of the propagation delay difference (4ns vs. 6ns)?

A: The DM74ALS533WM specifies 4ns propagation delay, while both Texas Instruments substitutes specify 6ns. This 2ns difference remains within the 74ALS logic family tolerance and does not affect functional compatibility in standard digital logic applications. System timing analysis should confirm acceptability for specific circuit requirements.

Q: Why does the SN74ALS533ANSR have a different package width?

A: The SN74ALS533ANSR uses a 20-SO package (0.209" width) versus the standard 20-SOIC (0.295" width). Both are 20-pin surface mount packages with identical pin spacing and electrical function. PCB footprint compatibility must be verified before selection, as the narrower width may not align with existing 20-SOIC land patterns.

Q: Are both Texas Instruments substitutes suitable for new designs?

A: Yes. Both SN74ALS533ADW and SN74ALS533ANSR carry Active product status from Texas Instruments, indicating current manufacturing and long-term availability. Both are ROHS3 compliant, supporting modern environmental and regulatory requirements.

Q: What is the difference between Tube and Tape & Reel packaging?

A: SN74ALS533ADW is supplied in Tube packaging, suitable for manual handling and smaller quantity orders. SN74ALS533ANSR is supplied in Tape & Reel format, optimized for automated assembly processes and higher volume production. Packaging selection depends on manufacturing process requirements.

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

A: The DM74ALS533WM does not specify RoHS status. Both Texas Instruments substitutes are ROHS3 compliant. All three parts share identical REACH status (REACH Unaffected), ECCN (EAR99), and HTSUS classification (8542.39.0001). Moisture Sensitivity Level is 1 (Unlimited) for all parts.