DM74AS32M OR Gate IC Equivalent & Substitute Parts

Part Overview

The DM74AS32M is a 4-channel 2-input OR gate logic IC manufactured by onsemi in 14-SOIC surface mount packaging. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The 74AS series represents a standard logic family with established electrical characteristics suitable for digital circuit applications requiring OR gate functionality.

Substiute Parts

DM74AS32M

onsemiIn Stock: 1839DM74AS32M Datasheet

Current PartRFQ

SN74AS32DR

Texas InstrumentsIn Stock: 4811SN74AS32DR Datasheet

DirectRFQ

SN74AS1032AD

Texas InstrumentsIn Stock: 918SN74AS1032AD Datasheet

SimilarRFQ

SN74AS32NSR

Texas InstrumentsIn Stock: 2896SN74AS32NSR Datasheet

SimilarRFQ

SN74AS32D

Texas InstrumentsIn Stock: 896SN74AS32D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DM74AS32M is determined by the following critical parameters:

• Logic function: 4-channel 2-input OR gate
• Supply voltage range: 4.5V ~ 5.5V
• Output current capability: 2mA high, 20mA low
• Input logic thresholds: 0.8V low, 2V high
• Propagation delay: 5.8ns @ 5V, 50pF load
• Operating temperature: 0°C ~ 70°C
• Package type: 14-SOIC surface mount
• Series family: 74AS

Substitute parts are grouped into three categories based on their relationship to the main part:

Direct Manufacturer Substitute (SN74AS32DR): Identical electrical specifications and primary package format with active product status and RoHS3 compliance.

Similar Manufacturer Substitutes (SN74AS1032AD, SN74AS32NSR): Functionally equivalent with minor variations in output current capability or package dimensions while maintaining core OR gate operation.

Parametric Equivalent (SN74AS32D): Matches all critical electrical parameters with last-time-buy status and RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

SN74AS32DR is the primary substitute for the obsolete DM74AS32M. This Texas Instruments part maintains identical electrical specifications, operates in active product status, and carries RoHS3 compliance certification. The tape and reel packaging format supports high-volume production environments.

SN74AS32D serves as an alternative substitute with parametric equivalence to the main part. This component is designated last-time-buy status and includes RoHS3 compliance. Tube packaging is suitable for lower-volume applications.

SN74AS32NSR provides functional substitution with identical output current and propagation delay characteristics. The primary distinction is package width (5.30mm versus 0.154" standard), which may affect PCB layout compatibility. This part maintains active status and RoHS3 compliance.

SN74AS1032AD is functionally equivalent but exhibits higher output current capability (48mA high and low versus 2mA/20mA). Propagation delay is marginally increased to 6.3ns. This part is suitable for applications requiring enhanced drive capability and maintains active status with RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can SN74AS32DR directly replace DM74AS32M without circuit modifications?

A: Yes. SN74AS32DR maintains identical electrical specifications including supply voltage, input logic thresholds, output current, and propagation delay. The 14-SOIC package dimensions are equivalent, enabling direct PCB substitution.

Q: What is the difference between SN74AS32NSR and SN74AS32DR?

A: Both parts are electrically identical 4-channel 2-input OR gates with matching propagation delay and output current specifications. The primary difference is package width: SN74AS32NSR measures 5.30mm while SN74AS32DR measures 3.90mm. This affects PCB footprint compatibility and should be verified against design specifications.

Q: Is SN74AS1032AD a suitable substitute despite higher output current?

A: SN74AS1032AD is functionally compatible as a 4-channel 2-input OR gate. The increased output current (48mA versus 2mA/20mA) represents enhanced drive capability and does not prevent substitution. The 0.5ns increase in propagation delay (6.3ns versus 5.8ns) is within acceptable tolerance for most digital applications. Verify timing-critical circuit requirements before selection.

Q: What is the significance of product status (Active, Last Time Buy, Obsolete)?

A: Active status indicates ongoing manufacturing and availability. Last Time Buy indicates limited future availability with a defined cutoff date. Obsolete status means the manufacturer no longer produces the part. For long-term supply chain planning, active parts (SN74AS32DR, SN74AS1032AD, SN74AS32NSR) are preferred over last-time-buy options (SN74AS32D).

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All Texas Instruments substitute parts listed carry RoHS3 compliance certification, meeting environmental and regulatory requirements for electronic component manufacturing and use.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel (TR) and Tube packaging formats do not alter electrical characteristics. Selection between packaging formats depends on production volume and handling requirements rather than circuit performance.