DM74AS1000AM Equivalent & Substitute Parts

Part Overview

The DM74AS1000AM is a NAND Gate IC with 4 channels and 2 inputs per channel, manufactured by onsemi in a 14-SOIC package. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The 74AS series logic gate remains functionally relevant in legacy system maintenance and component replacement scenarios where pin-compatible alternatives are required.

Substiute Parts

DM74AS1000AM

onsemiIn Stock: 1668DM74AS1000AM Datasheet

Current PartRFQ

SN74AS1000AD

Texas InstrumentsIn Stock: 2146SN74AS1000AD Datasheet

DirectRFQ

SN74AS1000ADR

Texas InstrumentsIn Stock: 6202SN74AS1000ADR Datasheet

DirectRFQ

SN74AS1000ANSR

Texas InstrumentsIn Stock: 3310SN74AS1000ANSR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DM74AS1000AM is determined by strict equivalence across the following parameters:

• Logic Type: NAND Gate (4 channels, 2 inputs)
• Electrical Specifications: Supply voltage 4.5V ~ 5.5V, output current 48mA, input logic levels, and propagation delay
• Operating Temperature Range: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package Compatibility: 14-SOIC form factor

Substitute parts are classified into two categories:

Direct Substitutes maintain identical electrical and package specifications with only packaging format differences (Tube vs. Tape & Reel).

Similar Substitutes maintain all electrical specifications but feature a slightly different package width (0.209" vs. 0.154"), requiring mechanical verification for board-level compatibility.

Parameter Comparison

Engineering Selection Recommendations

SN74AS1000ADR (Texas Instruments) is the primary substitute for the DM74AS1000AM. This part maintains active product status, ensuring long-term availability and supply chain stability. It is ROHS3 compliant and carries identical electrical specifications and package dimensions. The Tape & Reel packaging format supports automated assembly processes.

SN74AS1000AD (Texas Instruments) serves as an alternative direct substitute with identical electrical and package specifications. However, its Last Time Buy status indicates limited future availability, making it suitable only for immediate replacement needs where supply is confirmed.

SN74AS1000ANSR (Texas Instruments) is functionally equivalent but features a wider package body (0.209" vs. 0.154"). This part is active and ROHS3 compliant. Board-level mechanical compatibility must be confirmed before selection, as the increased width may conflict with existing PCB layouts designed for the narrower 0.154" package.

Frequently Asked Questions (FAQ)

Q: Can SN74AS1000ANSR be used as a direct replacement for DM74AS1000AM on existing PCBs?

A: Electrical substitution is valid. However, the SN74AS1000ANSR package width is 0.209" compared to the DM74AS1000AM's 0.154". Physical board-level compatibility must be confirmed before installation. If PCB footprints are designed with tight spacing tolerances, the wider package may not fit.

Q: What is the difference between SN74AS1000AD and SN74AS1000ADR?

A: Both parts are electrically and mechanically identical. The primary difference is packaging format: SN74AS1000AD is supplied in Tube packaging, while SN74AS1000ADR is supplied in Tape & Reel format. Selection depends on assembly process requirements and inventory management preferences.

Q: Why is the DM74AS1000AM classified as obsolete?

A: The DM74AS1000AM is no longer in active production by onsemi. Texas Instruments continues to manufacture functionally equivalent 74AS1000 variants, making them the recommended source for ongoing component requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All Texas Instruments substitutes (SN74AS1000AD, SN74AS1000ADR, and SN74AS1000ANSR) are ROHS3 compliant. The original DM74AS1000AM RoHS status was not specified in available documentation.

Q: What are the key electrical parameters that determine substitutability?

A: Supply voltage (4.5V ~ 5.5V), output current (48mA), input logic levels (0.8V low, 2V high), propagation delay (4ns @ 5V, 50pF), and operating temperature range (0°C ~ 70°C) must remain constant across all substitutes. All listed alternatives maintain these specifications.