CD74ACT32ME4 Equivalent & Substitute Parts

Part Overview

The CD74ACT32ME4 is a 4-channel 2-input OR gate logic integrated circuit manufactured by Texas Instruments in a 14-SOIC surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers. The CD74ACT32ME4 operates within the 74ACT logic family standard, providing OR gate functionality with specified electrical characteristics suitable for digital logic applications requiring 4.5V to 5.5V supply voltage operation.

Substiute Parts

CD74ACT32ME4

Texas InstrumentsIn Stock: 876CD74ACT32ME4 Datasheet

Current PartRFQ

MC74ACT32DR2G

onsemiIn Stock: 1766MC74ACT32DR2G Datasheet

DirectRFQ

74ACT32SC

Fairchild SemiconductorIn Stock: 291074ACT32SC Datasheet

MFR RecommendedRFQ

74ACT32SCX

Fairchild SemiconductorIn Stock: 4880974ACT32SCX Datasheet

MFR RecommendedRFQ

MC74ACT32DG

onsemiIn Stock: 2384MC74ACT32DG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74ACT32ME4 is determined by strict equivalence across the following critical parameters:

Functional Equivalence Criteria:

• Logic Type: OR Gate
• Number of Circuits: 4 channels
• Number of Inputs: 2 inputs per channel
• Package / Case: 14-SOIC form factor
• Base Product Number: 74ACT32 series

Electrical Compatibility Criteria:

• Voltage - Supply: 4.5V ~ 5.5V
• Current - Output High, Low: 24mA, 24mA
• Input Logic Level - Low: 0.8V
• Input Logic Level - High: 2V
• Mounting Type: Surface Mount

All identified substitute parts maintain identical functional specifications and electrical parameters within the 74ACT32 logic family. Variations in propagation delay and operating temperature ranges are noted but do not preclude substitution where application requirements permit.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Full Specification Match):

MC74ACT32DR2G (onsemi) and MC74ACT32DG (onsemi) are direct functional equivalents with active product status. Both parts maintain identical electrical specifications to the CD74ACT32ME4 with the exception of operating temperature range (-40°C ~ 85°C versus -55°C ~ 125°C) and propagation delay (9ns versus 12.1ns). The onsemi parts demonstrate improved propagation delay performance. Both are ROHS3 compliant with MSL 1 rating. MC74ACT32DR2G is supplied in Cut Tape and Digi-Reel packaging with 1698 units in stock. MC74ACT32DG is supplied in Tube packaging with 2356 units in stock.

Secondary Substitutes (Specification Variance):

74ACT32SCX (Fairchild Semiconductor) is functionally equivalent with identical electrical specifications and improved propagation delay (9ns). This part is active with 48707 units in stock. Operating temperature range is -40°C ~ 85°C. Packaging details are not fully specified in available data.

74ACT32SC (Fairchild Semiconductor) is listed as an active substitute with 2800 units in stock. Complete electrical specifications are not provided in available data, limiting full parameter verification.

Selection Basis:

Selection among active substitutes should be based on application operating temperature requirements. Applications requiring -55°C operation cannot use onsemi or Fairchild alternatives without thermal derating analysis. Applications operating within -40°C ~ 85°C range may use any active substitute. Propagation delay improvement in substitute parts (9ns versus 12.1ns) benefits timing-critical applications. Packaging format and supplier availability should be evaluated based on procurement and assembly requirements.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT32DR2G replace CD74ACT32ME4 in all applications?

A: MC74ACT32DR2G is functionally equivalent for applications operating within -40°C ~ 85°C temperature range. The CD74ACT32ME4 specifies -55°C ~ 125°C operation. Applications requiring the full -55°C ~ 125°C range require thermal analysis or alternative sourcing.

Q: What is the difference between MC74ACT32DR2G and MC74ACT32DG?

A: Both parts are electrically identical onsemi 74ACT32 OR gate ICs. The primary difference is packaging format: MC74ACT32DR2G is supplied in Cut Tape and Digi-Reel format, while MC74ACT32DG is supplied in Tube format. Selection depends on assembly equipment compatibility and procurement preferences.

Q: Are all substitute parts in the same 14-SOIC package?

A: MC74ACT32DR2G, MC74ACT32DG, and 74ACT32SCX are confirmed in 14-SOIC (0.154", 3.90mm Width) packages. 74ACT32SC packaging is not fully specified in available data and should be verified before selection.

Q: Does the improved propagation delay in substitute parts affect compatibility?

A: Improved propagation delay (9ns in substitutes versus 12.1ns in CD74ACT32ME4) does not create compatibility issues. Faster propagation delay is beneficial for timing-critical applications and does not introduce functional incompatibility.

Q: Are all substitute parts RoHS compliant?

A: MC74ACT32DR2G and MC74ACT32DG are confirmed ROHS3 compliant. RoHS compliance status for 74ACT32SC and 74ACT32SCX is not specified in available data and should be verified for applications with RoHS requirements.

Q: What inventory levels are available for each substitute?

A: MC74ACT32DR2G: 1698 units; MC74ACT32DG: 2356 units; 74ACT32SCX: 48707 units; 74ACT32SC: 2800 units. Inventory levels should be confirmed with suppliers for current availability.