DM74ALS564AWMX Equivalent & Substitute Parts

Part Overview

The DM74ALS564AWMX is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit capacity and tri-state non-inverted output. This component operates at a clock frequency of 30 MHz with a maximum propagation delay of 14ns at 5V with 50pF load. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning.

Substiute Parts

DM74ALS564AWMX

onsemiIn Stock: 3481DM74ALS564AWMX Datasheet

Current PartRFQ

SN74ALS564BDW

Texas InstrumentsIn Stock: 1043SN74ALS564BDW Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DM74ALS564AWMX is determined by strict alignment with the following critical parameters:

• Logic Family & Series: 74ALS series compatibility
• Functional Type: D-Type flip-flop with 1 element, 8-bit configuration
• Electrical Performance: Clock frequency of 30 MHz, propagation delay of 14ns @ 5V/50pF, tri-state output capability
• Electrical Characteristics: Supply voltage 4.5V ~ 5.5V, output current ratings (2.6mA high, 24mA low), quiescent current 18 mA
• Physical Package: 20-SOIC surface mount package with identical dimensions (0.295", 7.50mm width)
• Operating Temperature Range: 0°C ~ 70°C

The SN74ALS564BDW from Texas Instruments meets all functional and electrical requirements. The primary distinction is output polarity: the substitute features tri-state inverted output compared to the main part's non-inverted output. This difference requires circuit-level evaluation for compatibility in specific applications.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS564BDW is an active product from Texas Instruments with identical electrical performance and package specifications to the obsolete DM74ALS564AWMX. Both components comply with REACH regulations and carry EAR99 ECCN classification. The SN74ALS564BDW additionally carries RoHS3 compliance certification.

The critical distinction between these parts is output polarity. The DM74ALS564AWMX provides non-inverted tri-state output, while the SN74ALS564BDW provides inverted tri-state output. Selection between these parts depends on whether the receiving circuit logic requires non-inverted or inverted signal states. Direct pin-for-pin substitution is not possible without accounting for this output polarity difference in circuit design.

For new designs or procurement of replacement stock, the SN74ALS564BDW is the recommended choice due to its active product status and continued manufacturer support from Texas Instruments.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS564BDW be used as a direct drop-in replacement for the DM74ALS564AWMX?

A: Both parts share identical package dimensions (20-SOIC), pin count, electrical ratings, and timing specifications. However, the output polarity differs: the DM74ALS564AWMX provides non-inverted output while the SN74ALS564BDW provides inverted output. Direct substitution requires circuit-level compatibility verification for output signal polarity.

Q: What is the significance of the output type difference (non-inverted vs. inverted)?

A: Output polarity determines the logic state presented at the flip-flop outputs. Non-inverted output presents the true state of the stored bit, while inverted output presents the complementary state. The receiving circuit logic must be compatible with the output polarity of the selected component.

Q: Are the electrical performance characteristics identical between these parts?

A: Yes. Both components operate at 30 MHz clock frequency, exhibit 14ns maximum propagation delay at 5V with 50pF load, support 4.5V to 5.5V supply voltage, and maintain identical output current ratings (2.6mA high, 24mA low) and quiescent current (18 mA).

Q: What is the product status difference, and why does it matter?

A: The DM74ALS564AWMX is classified as obsolete, indicating onsemi no longer manufactures or supports this part. The SN74ALS564BDW is active, meaning Texas Instruments continues production and provides ongoing technical support. For new designs or long-term procurement, active products are preferred.

Q: Are there compliance or certification differences?

A: Both parts are REACH unaffected and carry EAR99 ECCN classification. The SN74ALS564BDW additionally carries RoHS3 compliance certification. Both maintain MSL 1 (unlimited) moisture sensitivity rating.

Q: What package considerations apply to these components?

A: Both parts use 20-SOIC surface mount packaging with identical dimensions (0.295" width, 7.50mm). PCB footprints and reflow soldering profiles are compatible between the two parts.