MM74HCT32SJ Equivalent & Substitute Parts

Part Overview

The MM74HCT32SJ is a 4-channel 2-input OR gate logic IC manufactured by onsemi in 14-SOP surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74HCT32 series represents a standard logic gate function with multiple qualified manufacturers offering compatible alternatives that maintain electrical and mechanical compatibility within the allowed parameter ranges.

Substiute Parts

MM74HCT32SJ

onsemiIn Stock: 813MM74HCT32SJ Datasheet

Current PartRFQ

SN74HCT32NSR

Texas InstrumentsIn Stock: 3096SN74HCT32NSR Datasheet

DirectRFQ

74HCT32D,653

NXP SemiconductorsIn Stock: 3845074HCT32D,653 Datasheet

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CD74HCT32M96

Harris CorporationIn Stock: 3597CD74HCT32M96 Datasheet

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CD74HCT32MT

Texas InstrumentsIn Stock: 1108CD74HCT32MT Datasheet

SimilarRFQ

SN74HCT32D

Texas InstrumentsIn Stock: 3591SN74HCT32D Datasheet

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SN74HCT32DR

Texas InstrumentsIn Stock: 15966SN74HCT32DR Datasheet

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SN74HCT32DRG4

Texas InstrumentsIn Stock: 5031SN74HCT32DRG4 Datasheet

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SN74HCT32DT

Texas InstrumentsIn Stock: 2522SN74HCT32DT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MM74HCT32SJ is determined by strict adherence to the following electrical and mechanical parameters:

• Logic Function: All substitutes must be 4-channel 2-input OR gates (74HCT32 base product number)
• Supply Voltage: 4.5V ~ 5.5V operating range
• Input Logic Levels: Low ≤ 0.8V, High ≥ 2V
• Quiescent Current: Maximum 2 µA
• Mounting: Surface mount technology
• Package: 14-SOIC (0.154" or 0.209" width variants acceptable)
• Temperature Range: Minimum -40°C ~ 85°C (extended range -55°C ~ 125°C acceptable)
• MSL Rating: 1 (Unlimited)

Substitutes are grouped by product status and availability. Direct equivalents maintain identical electrical specifications. Similar parts meet all critical electrical parameters but may differ in packaging format, temperature range, or manufacturer discontinuation status.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74HCT32NSR (Texas Instruments) or SN74HCT32DR (Texas Instruments)

Both parts are active products with ROHS3 compliance and meet all electrical specifications of the MM74HCT32SJ. SN74HCT32NSR is supplied in Tape & Reel packaging with 3014 units in stock. SN74HCT32DR is supplied in Cut Tape & Digi-Reel format with 15923 units in stock, offering superior availability.

Secondary Recommendation: SN74HCT32D (Texas Instruments)

This part is discontinued at DiGi Electronics but maintains full electrical compatibility and ROHS3 compliance. It is suitable for applications where existing inventory is available and procurement from alternative distributors is feasible.

Extended Temperature Range Alternative: CD74HCT32MT (Texas Instruments)

For applications requiring -55°C ~ 125°C operating range, CD74HCT32MT provides extended temperature capability with ROHS3 compliance. This part is discontinued at DiGi Electronics but available through inventory channels.

Not Recommended: CD74HCT32M96 (Harris Corporation)

Although electrically compatible, this part is RoHS non-compliant and obsolete, making it unsuitable for new designs or applications with RoHS requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74HCT32DR be used as a direct replacement for MM74HCT32SJ?

A: Yes. Both parts meet the critical electrical parameters: 4-channel 2-input OR gate function, 4.5V ~ 5.5V supply voltage, 2 µA maximum quiescent current, and -40°C ~ 85°C operating temperature. The 14-SOIC package is mechanically compatible with the 14-SOP package footprint.

Q: What is the difference between SN74HCT32NSR and SN74HCT32DR?

A: Both are Texas Instruments 74HCT32 parts with identical electrical specifications. The primary difference is packaging format: SN74HCT32NSR is supplied in Tape & Reel, while SN74HCT32DR is supplied in Cut Tape & Digi-Reel. Selection depends on assembly process requirements and inventory management preferences.

Q: Why is CD74HCT32M96 not recommended despite electrical compatibility?

A: CD74HCT32M96 is RoHS non-compliant and obsolete. Applications subject to RoHS regulations or requiring long-term supply assurance should use ROHS3-compliant alternatives such as SN74HCT32DR or SN74HCT32NSR.

Q: Are there package compatibility concerns between 14-SOP and 14-SOIC variants?

A: The 14-SOP and 14-SOIC packages have different physical dimensions. 14-SOP measures 0.209" width while 14-SOIC measures 0.154" width. PCB footprints must be verified for compatibility. Most modern designs accommodate both package types through appropriate land pattern design.

Q: Can I use SN74HCT32DT or SN74HCT32DRG4 as substitutes?

A: Both parts meet electrical specifications and are ROHS3 compliant. However, both are discontinued at DiGi Electronics. Use only if existing inventory is available or procurement from alternative distributors is confirmed.

Q: What is the significance of the 2 µA quiescent current specification?

A: The 2 µA maximum quiescent current is a critical parameter for low-power applications. All qualified substitutes maintain this specification, ensuring equivalent power consumption characteristics in standby or idle operating modes.