DM74ALS534WM Equivalent & Substitute Parts

Part Overview

The DM74ALS534WM is a Flip Flop 1 Element D-Type 8 Bit Positive Edge logic integrated circuit manufactured by onsemi in a 20-SOIC (0.295", 7.50mm Width) package. This component functions as a standard D-type flip-flop with tri-state inverted outputs, operating at a clock frequency of 35 MHz with a maximum propagation delay of 16ns at 5V with 50pF load.

The DM74ALS534WM is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and maintenance applications.

Substiute Parts

DM74ALS534WM

onsemiIn Stock: 1288DM74ALS534WM Datasheet

Current PartRFQ

SN74ALS534ADWR

Texas InstrumentsIn Stock: 2781SN74ALS534ADWR Datasheet

DirectRFQ

SN74ALS534ANSR

Texas InstrumentsIn Stock: 3934SN74ALS534ANSR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DM74ALS534WM are identified based on strict electrical and mechanical parameter matching within the 74ALS logic family. The substitution criteria are:

Primary Substitution Criteria:

• Identical logic function: D-Type Flip Flop, 1 Element, 8 Bit
• Identical output configuration: Tri-State, Inverted
• Identical trigger type: Positive Edge
• Identical electrical specifications: 35 MHz clock frequency, 16ns propagation delay @ 5V/50pF
• Identical supply voltage range: 4.5V ~ 5.5V
• Identical quiescent current: 19 mA
• Identical operating temperature range: 0°C ~ 70°C
• Compatible package types: 20-SOIC variants

Direct Substitute: SN74ALS534ADWR (Texas Instruments) meets all electrical and mechanical parameters with identical 20-SOIC (0.295", 7.50mm Width) packaging.

Similar Substitute: SN74ALS534ANSR (Texas Instruments) meets all electrical parameters with a 20-SOIC package variant (0.209", 5.30mm Width), representing a narrower body width within the same SOIC family.

Parameter Comparison

Engineering Selection Recommendations

SN74ALS534ADWR (Direct Substitute): This Texas Instruments part is the primary substitute for the obsolete DM74ALS534WM. It maintains identical electrical specifications and package dimensions (20-SOIC 0.295" width), ensuring direct compatibility in existing PCB layouts. The part is currently in active production status with ROHS3 compliance, providing long-term availability and regulatory alignment.

SN74ALS534ANSR (Similar Substitute): This Texas Instruments alternative meets all electrical requirements but features a narrower 20-SOIC package body (0.209" width versus 0.295"). This variant is suitable for applications where PCB layout accommodates the reduced package width. The part is in active production with ROHS3 compliance.

Both substitute parts are manufactured by Texas Instruments, a primary source for 74ALS logic families, and carry identical functional and electrical specifications to the original DM74ALS534WM. Selection between the two substitutes depends on PCB layout constraints and package width requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS534ADWR be used as a direct replacement for DM74ALS534WM?

A: Yes. The SN74ALS534ADWR is a direct substitute. It maintains identical electrical specifications (35 MHz clock frequency, 16ns propagation delay, 4.5V-5.5V supply voltage, 19mA quiescent current) and identical package dimensions (20-SOIC 0.295" width). No circuit modifications are required.

Q: What is the difference between SN74ALS534ADWR and SN74ALS534ANSR?

A: Both parts are electrically identical and meet the same functional specifications. The primary difference is package width: SN74ALS534ADWR uses a 20-SOIC package with 0.295" width, while SN74ALS534ANSR uses a 20-SOIC package with 0.209" width. Selection depends on PCB layout compatibility.

Q: Are the Texas Instruments substitutes compatible with the original onsemi part in terms of pin configuration?

A: Yes. All three parts (DM74ALS534WM, SN74ALS534ADWR, and SN74ALS534ANSR) are members of the 74ALS logic family with identical D-Type Flip Flop functionality, pin count (20 pins), and electrical characteristics. Pin-to-pin compatibility is maintained.

Q: What is the significance of the "Tri-State, Inverted" output type?

A: This specification indicates the output configuration of the flip-flop. Tri-State outputs can be in a high state, low state, or high-impedance state, allowing multiple devices to share a common bus. The "Inverted" designation specifies the logic polarity of the output signals. All substitute parts maintain this identical output configuration.

Q: Are there any compliance or regulatory differences between the original and substitute parts?

A: The substitute parts (SN74ALS534ADWR and SN74ALS534ANSR) are ROHS3 compliant, while the original DM74ALS534WM does not specify RoHS status. All three parts are REACH Unaffected and carry identical Moisture Sensitivity Level (MSL) ratings of 1 (Unlimited). The Texas Instruments parts provide enhanced regulatory compliance for modern manufacturing environments.

Q: What inventory status should be considered when selecting a substitute?

A: SN74ALS534ADWR has 2,748 pieces in stock, and SN74ALS534ANSR has 3,872 pieces in stock, both significantly higher than the original DM74ALS534WM (1,186 pieces). The substitute parts offer superior availability for production requirements.