DM74AS652WM Equivalent & Substitute Parts

Part Overview

The DM74AS652WM is a non-inverting transceiver logic integrated circuit manufactured by onsemi, featuring 1 element with 8 bits per element and 3-state output capability. This component operates within the 74AS logic series and is housed in a 24-SOP package. The device is currently classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and component procurement.

Substiute Parts

DM74AS652WM

onsemiIn Stock: 843DM74AS652WM Datasheet

Current PartRFQ

SN74AS646DW

Texas InstrumentsIn Stock: 988SN74AS646DW Datasheet

Parametric EquivalentRFQ

SN74AS652DW

Texas InstrumentsIn Stock: 1021SN74AS652DW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DM74AS652WM are identified based on strict parametric equivalence across the following criteria:

Critical Matching Parameters:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Current - Output High, Low: 15mA, 48mA
• Voltage - Supply: 4.5V ~ 5.5V
• Operating Temperature: 0°C ~ 70°C (TA)
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (0.295", 7.50mm Width)
• Series: 74AS

The identified substitute parts maintain identical electrical specifications and mechanical compatibility with the original DM74AS652WM. Both substitute parts are manufactured by Texas Instruments and are classified as active products, ensuring continued availability and support.

Parameter Comparison

Engineering Selection Recommendations

Both SN74AS646DW and SN74AS652DW from Texas Instruments serve as direct parametric equivalents to the obsolete DM74AS652WM. Selection between these alternatives should be based on the following factors:

Product Status: Both substitute parts maintain active product status with Texas Instruments, ensuring long-term availability and manufacturing support compared to the obsolete onsemi part.

Compliance Certifications: Both substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The original DM74AS652WM does not specify RoHS compliance status.

Electrical and Mechanical Compatibility: All three parts share identical electrical specifications, output characteristics, supply voltage ranges, and operating temperature ranges. The 24-SOIC package dimensions are equivalent across all parts, enabling direct board-level substitution without layout modifications.

Inventory Availability: Texas Instruments parts demonstrate higher current inventory levels (913 and 947 units respectively) compared to the onsemi original (775 units), supporting procurement reliability.

Frequently Asked Questions (FAQ)

Q: Can SN74AS646DW and SN74AS652DW be used interchangeably with DM74AS652WM?

A: Yes. Both parts maintain identical electrical specifications, including output current ratings (15mA high, 48mA low), supply voltage range (4.5V to 5.5V), operating temperature range (0°C to 70°C), and 3-state output configuration. The 24-SOIC package dimensions are equivalent, enabling direct substitution.

Q: What is the difference between SN74AS646DW and SN74AS652DW?

A: Both parts are functionally equivalent non-inverting transceivers with identical electrical and mechanical specifications. The difference lies in the base product number designation (74AS646 versus 74AS652), though both maintain the same pin configuration, package, and performance characteristics.

Q: Why is the DM74AS652WM classified as obsolete?

A: The DM74AS652WM is an older onsemi product that has been discontinued. Texas Instruments continues to manufacture equivalent parts under the 74AS series, providing ongoing support for this logic function.

Q: Are there any package or pinout differences between the substitute parts and the original?

A: No. All three parts use the 24-SOIC package with identical 0.295" width and 7.50mm dimensions. Pinout and mechanical compatibility are maintained across all parts.

Q: Do the substitute parts meet current environmental standards?

A: Yes. Both Texas Instruments substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for component procurement and use.