DM74AS32SJ Equivalent & Substitute Parts

Part Overview

The DM74AS32SJ is a 4-channel 2-input OR gate logic IC manufactured by onsemi in a 14-SOP surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The DM74AS32SJ operates within the 74AS logic family standard, which defines compatible electrical and mechanical parameters for direct substitution within this product category.

Substiute Parts

DM74AS32SJ

onsemiIn Stock: 946DM74AS32SJ Datasheet

Current PartRFQ

SN74AS32NSR

Texas InstrumentsIn Stock: 2896SN74AS32NSR Datasheet

DirectRFQ

SN74AS32D

Texas InstrumentsIn Stock: 896SN74AS32D Datasheet

SimilarRFQ

SN74AS32DR

Texas InstrumentsIn Stock: 4811SN74AS32DR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution within the 74AS32 family is determined by electrical parameter equivalence and mechanical compatibility. All substitute parts maintain identical logic function (4-channel 2-input OR gate), supply voltage range (4.5V ~ 5.5V), input/output logic levels, propagation delay specifications, and operating temperature range. The critical parameters enabling substitution are:

• Logic Type: OR Gate (4 channels, 2 inputs per channel)
• Voltage - Supply: 4.5V ~ 5.5V
• Current - Output High, Low: 2mA, 20mA
• Input Logic Level - Low: 0.8V
• Input Logic Level - High: 2V
• Max Propagation Delay @ V, Max CL: 5.8ns @ 5V, 50pF
• Operating Temperature: 0°C ~ 70°C
• Series: 74AS
• Base Product Number: 74AS32

Substitute parts are grouped by manufacturer and packaging configuration. All listed substitutes are manufactured by Texas Instruments and belong to the active or last-time-buy product status category, providing design continuity for the obsolete onsemi part.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the DM74AS32SJ, the SN74AS32DR (Texas Instruments, active status, tape & reel packaging) is the primary substitute. This part maintains full electrical equivalence and is actively manufactured, ensuring long-term availability and supply chain stability.

The SN74AS32NSR (Texas Instruments, active status, 14-SO packaging) provides an alternative with identical electrical specifications and active product status. This option is suitable for designs where the specific 14-SO package configuration is acceptable.

The SN74AS32D (Texas Instruments, last-time-buy status, tube packaging) remains available but with limited procurement window. This part is electrically equivalent but should be considered only when SN74AS32DR or SN74AS32NSR are unavailable.

All substitute parts are ROHS3 compliant and carry REACH unaffected status, meeting current regulatory requirements for electronic component procurement.

Frequently Asked Questions (FAQ)

Q: Can SN74AS32DR be used as a direct replacement for DM74AS32SJ?

A: Yes. Both parts are 4-channel 2-input OR gates with identical electrical specifications (supply voltage, logic levels, propagation delay, output current). The primary difference is packaging configuration and manufacturer. SN74AS32DR uses 14-SOIC (0.154", 3.90mm width) while DM74AS32SJ uses 14-SOP (0.209", 5.30mm width). PCB layout compatibility must be verified before substitution.

Q: What is the difference between SN74AS32NSR, SN74AS32D, and SN74AS32DR?

A: All three are Texas Instruments 74AS32 OR gate ICs with identical electrical performance. The differences are packaging and product status: SN74AS32NSR uses 14-SO packaging and is active; SN74AS32D uses 14-SOIC packaging and is last-time-buy; SN74AS32DR uses 14-SOIC packaging and is active. SN74AS32DR is recommended for new designs due to active status.

Q: Are there package compatibility issues when substituting these parts?

A: Yes. DM74AS32SJ (14-SOP, 0.209" width) has different pin spacing than SN74AS32D and SN74AS32DR (14-SOIC, 0.154" width). PCB footprint redesign may be required. SN74AS32NSR (14-SO) should be evaluated for footprint compatibility with your existing design.

Q: Do all substitute parts meet RoHS and REACH requirements?

A: All Texas Instruments substitutes (SN74AS32NSR, SN74AS32D, SN74AS32DR) are ROHS3 compliant and REACH unaffected. The original DM74AS32SJ does not specify RoHS status but is REACH unaffected.

Q: What is the inventory status for these substitute parts?

A: SN74AS32DR has the highest inventory (4,725 pcs), followed by SN74AS32NSR (2,794 pcs) and SN74AS32D (855 pcs). For procurement planning, SN74AS32DR is the most readily available option.