74AC32SC OR Gate IC Equivalent & Substitute Parts

Part Overview

The 74AC32SC is a 4-channel 2-input OR gate logic IC manufactured by onsemi in 14-SOIC surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74AC32 series represents a standard logic gate function across multiple manufacturers and packaging options, with several active alternatives available to maintain design continuity.

Substiute Parts

74AC32SC

onsemiIn Stock: 157874AC32SC Datasheet

Current PartRFQ

MC74AC32DR2G

onsemiIn Stock: 1575MC74AC32DR2G Datasheet

DirectRFQ

MC74AC32DG

onsemiIn Stock: 4427MC74AC32DG Datasheet

Parametric EquivalentRFQ

SN74AC32DR

Texas InstrumentsIn Stock: 5121SN74AC32DR Datasheet

DirectRFQ

SN74AC32MDREP

Texas InstrumentsIn Stock: 1014SN74AC32MDREP Datasheet

UpgradeRFQ

CD74AC32M96

Texas InstrumentsIn Stock: 2667CD74AC32M96 Datasheet

SimilarRFQ

SN74AC32NSR

Texas InstrumentsIn Stock: 4644SN74AC32NSR Datasheet

SimilarRFQ

SN74AC32D

Texas InstrumentsIn Stock: 2054SN74AC32D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74AC32SC is determined by the following critical parameters: logic function (4-channel 2-input OR gate), supply voltage range (2V ~ 6V minimum), output drive capability (24mA minimum), propagation delay (7.5ns maximum @ 5V, 50pF), and package compatibility (14-SOIC form factor). Parts are grouped into three categories based on electrical equivalence and product status:

Direct Manufacturer Equivalents maintain identical electrical specifications and 14-SOIC packaging, differing only in packaging format (tape & reel vs. tube) or manufacturer. These parts are pin-for-pin compatible with no design modifications required.

Parametric Equivalents meet or exceed all critical electrical parameters but may have extended operating temperature ranges or slightly different quiescent current specifications. These parts function identically in the 74AC32SC application.

Similar Parts offer the same logic function and package family but with variations in voltage supply range, input logic levels, or propagation delay. These require verification of application-specific requirements before substitution.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents): MC74AC32DR2G and MC74AC32DG from onsemi maintain identical electrical performance to the 74AC32SC with active product status. Both are ROHS3 compliant and MSL 1 rated. MC74AC32DR2G is available in cut tape and digi-reel format for automated assembly, while MC74AC32DG is supplied in tube format. Selection between these depends on procurement and assembly requirements.

SN74AC32DR from Texas Instruments is electrically equivalent with identical quiescent current (2 µA) and propagation delay specifications. This part is active and available in tape & reel format.

Extended Temperature Alternative: SN74AC32MDREP extends the operating temperature range to -55°C ~ 125°C while maintaining all other electrical specifications of the 74AC32SC. This part is suitable for applications requiring wider temperature performance and is ROHS3 compliant.

Lower Voltage Supply Alternative: CD74AC32M96 operates across 1.5V ~ 5.5V supply range, providing compatibility with lower voltage systems. Propagation delay increases to 9.5ns at 5V with 50pF load. This part is active and ROHS3 compliant, suitable for battery-powered or low-voltage applications.

Package Variant: SN74AC32NSR provides identical electrical performance in 14-SO package (0.209" width) instead of 14-SOIC (0.154" width). This part is suitable only if PCB layout accommodates the wider package footprint.

Avoid: SN74AC32D is discontinued at DiGi Electronics and should not be selected for new designs despite electrical equivalence.

Frequently Asked Questions (FAQ)

Q: Can MC74AC32DR2G directly replace 74AC32SC without PCB modifications? A: Yes. MC74AC32DR2G is pin-for-pin compatible with identical 14-SOIC (0.154") package dimensions. The only difference is quiescent current (4 µA vs. 2 µA), which does not affect circuit functionality. Packaging format differs (cut tape & digi-reel vs. tube), but this affects procurement only, not circuit performance.

Q: What is the difference between MC74AC32DG and MC74AC32DR2G? A: Both parts are electrically identical with the same specifications. The difference is packaging format: MC74AC32DG is supplied in tube format for manual handling, while MC74AC32DR2G is supplied in cut tape and digi-reel format for automated pick-and-place assembly.

Q: Can CD74AC32M96 be used in place of 74AC32SC? A: CD74AC32M96 is functionally compatible but has different electrical specifications. Supply voltage range is 1.5V ~ 5.5V (vs. 2V ~ 6V), and propagation delay is 9.5ns (vs. 7.5ns). Use this part only if your application operates within the 1.5V ~ 5.5V range and can tolerate the longer propagation delay.

Q: Is SN74AC32NSR compatible with 74AC32SC? A: SN74AC32NSR is electrically equivalent but uses 14-SO package (0.209" width) instead of 14-SOIC (0.154" width). PCB footprint is different and larger. Use only if your PCB layout accommodates the wider package.

Q: Why is SN74AC32MDREP listed as an upgrade? A: SN74AC32MDREP extends operating temperature range to -55°C ~ 125°C compared to 74AC32SC's -40°C ~ 85°C. All other electrical specifications remain identical. This part is suitable for applications requiring extended temperature performance.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the 74AC32SC compliance status.

Q: Which substitute has the best availability? A: SN74AC32DR from Texas Instruments has 5038 pcs in stock. MC74AC32DG from onsemi has 4321 pcs in stock. Both are readily available active parts suitable for immediate procurement.