DM74LS32N Equivalent & Substitute Parts

Part Overview

The DM74LS32N is a 4-channel OR gate logic IC manufactured by onsemi in a 14-pin DIP package. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing design requirements and production needs. The DM74LS32N performs standard OR logic operations with two inputs per channel, making it suitable for digital logic applications requiring OR gate functionality.

Substiute Parts

DM74LS32N

onsemiIn Stock: 2978DM74LS32N Datasheet

Current PartRFQ

SN74LS32N

Texas InstrumentsIn Stock: 13834SN74LS32N Datasheet

DirectRFQ

SN74LS32NE4

Texas InstrumentsIn Stock: 1605SN74LS32NE4 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DM74LS32N are qualified based on the following criteria:

Electrical Parameters (Must Match):

• Logic Type: OR Gate
• Number of Circuits: 4
• Number of Inputs: 2
• Voltage - Supply: 4.75V ~ 5.25V
• Current - Output High, Low: 400µA, 8mA
• Input Logic Level - Low: 0.8V
• Input Logic Level - High: 2V
• Operating Temperature: 0°C ~ 70°C

Mechanical Parameters (Must Match):

• Package / Case: 14-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole

Acceptable Variations:

• Propagation delay may vary within the 74LS series specification
• Manufacturer may differ
• Product status may differ (active vs. discontinued)
• RoHS compliance status may differ

Parameter Comparison

Engineering Selection Recommendations

SN74LS32N (Texas Instruments) is the primary substitute for the DM74LS32N. This part maintains identical electrical and mechanical specifications while offering active product status and ROHS3 compliance. The SN74LS32N is suitable for new designs and production applications requiring OR gate functionality in the 74LS logic family.

SN74LS32NE4 (Texas Instruments) is a secondary substitute option. This part is electrically and mechanically equivalent to the DM74LS32N and SN74LS32N but carries discontinued status at DiGi Electronics. This part may be considered for legacy system repairs or applications where existing inventory is available.

Both Texas Instruments substitutes provide ROHS3 compliance, addressing environmental and regulatory requirements that the original onsemi part does not meet.

Frequently Asked Questions (FAQ)

Q: Can SN74LS32N directly replace DM74LS32N in existing designs? A: Yes. The SN74LS32N is electrically and mechanically equivalent. Both parts share identical logic type, circuit count, input count, supply voltage range, output current specifications, input logic levels, and operating temperature range. The 14-DIP through-hole package is identical, allowing direct socket substitution.

Q: What is the difference between SN74LS32N and SN74LS32NE4? A: Both parts are electrically and mechanically identical. The primary difference is product status: SN74LS32N is active, while SN74LS32NE4 is discontinued at DiGi Electronics. For new production, SN74LS32N is the recommended choice due to active availability.

Q: Does the propagation delay difference affect substitution? A: No. The DM74LS32N specifies 15ns propagation delay at 5V with 50pF load, while both Texas Instruments substitutes specify 22ns at 5V with 15pF load. Both values fall within the 74LS series specification envelope and do not prevent functional substitution in standard logic applications.

Q: Are there RoHS compliance implications when substituting? A: Yes. The original DM74LS32N is RoHS non-compliant, while both SN74LS32N and SN74LS32NE4 are ROHS3 compliant. If your application or supply chain requires RoHS compliance, the Texas Instruments substitutes satisfy this requirement.

Q: Can these parts be used interchangeably in PCB designs? A: Yes. All three parts use the 14-DIP (0.300", 7.62mm) package with through-hole mounting. PCB footprints and board layouts designed for the DM74LS32N accommodate both substitute parts without modification.