DM74AS245SJX Equivalent & Substitute Parts

Part Overview

The DM74AS245SJX is a non-inverting transceiver logic IC manufactured by onsemi, featuring 1 element with 8 bits per element and 3-state output capability. This component operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-SOP package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

DM74AS245SJX

onsemiIn Stock: 1083DM74AS245SJX Datasheet

Current PartRFQ

SN74AS245DW

Texas InstrumentsIn Stock: 973SN74AS245DW Datasheet

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SN74AS245NSR

Texas InstrumentsIn Stock: 2392SN74AS245NSR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DM74AS245SJX are qualified based on the following critical parameters that determine functional equivalence:

• Series designation (74AS)
• Logic type (Transceiver, Non-Inverting)
• Number of elements (1) and bits per element (8)
• Output type (3-State)
• Supply voltage range (4.5V ~ 5.5V)
• Operating temperature range (0°C ~ 70°C)
• Mounting type (Surface Mount)
• Package compatibility (20-SOIC footprint)

The identified substitutes SN74AS245DW and SN74AS245NSR meet all these core electrical and mechanical criteria. Both are manufactured by Texas Instruments and maintain active product status, providing improved availability compared to the obsolete onsemi part.

Parameter Comparison

Engineering Selection Recommendations

Both SN74AS245DW and SN74AS245NSR are valid substitutes for the obsolete DM74AS245SJX based on electrical equivalence and functional compatibility.

SN74AS245NSR is the preferred selection when package footprint matching is required. This part maintains the identical 20-SOIC package dimensions (0.209", 5.30mm Width) as the original onsemi component, enabling direct board-level substitution without layout modifications.

SN74AS245DW offers an alternative with a wider 20-SOIC package (0.295", 7.50mm Width). This part is suitable for applications where package footprint variation is acceptable. Both Texas Instruments parts carry ROHS3 compliance certification, meeting modern environmental and regulatory requirements.

The output current specification difference (48mA versus 64mA for low output) represents an improvement in the substitute parts, providing enhanced drive capability without compromising system compatibility.

Frequently Asked Questions (FAQ)

Q: Can SN74AS245DW and SN74AS245NSR be used interchangeably with DM74AS245SJX?

A: Both parts are electrically equivalent and functionally compatible. The primary consideration is package footprint. SN74AS245NSR maintains identical package dimensions to the original part. SN74AS245DW has a wider package body and requires verification of PCB layout compatibility.

Q: What is the difference between SN74AS245DW and SN74AS245NSR?

A: Both parts are identical in electrical specifications and logic function. The differences are packaging format and package body width. SN74AS245DW is supplied in Tube packaging with a 0.295" package width. SN74AS245NSR is supplied in Tape & Reel format with a 0.209" package width matching the original DM74AS245SJX footprint.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both SN74AS245DW and SN74AS245NSR are ROHS3 compliant. The original DM74AS245SJX RoHS status was not specified in available documentation.

Q: What is the significance of the output current difference (48mA vs 64mA)?

A: The substitute parts provide higher low-side output current (64mA) compared to the original specification (48mA). This represents improved performance and does not create compatibility issues in applications designed for the original 48mA specification.

Q: Why is the DM74AS245SJX classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured by onsemi. Texas Instruments continues active production of functionally equivalent 74AS245 variants, making these the recommended alternatives for new designs and ongoing system support.