DM74LS365AN Equivalent & Substitute Parts

Part Overview

The DM74LS365AN is a Buffer, Non-Inverting logic IC with 6 elements, 1 bit per element, and 3-state output capability in a 16-PDIP package. This component operates at 4.75V to 5.25V supply voltage with output currents of 2.6mA (high) and 24mA (low), designed for through-hole mounting applications. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations where legacy compatibility is required.

Substiute Parts

DM74LS365AN

onsemiIn Stock: 2088DM74LS365AN Datasheet

Current PartRFQ

SN74LS365AN

onsemiIn Stock: 9142SN74LS365AN Datasheet

DirectRFQ

CD74HCT365E

Texas InstrumentsIn Stock: 1595CD74HCT365E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DM74LS365AN is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Logic type: Buffer, Non-Inverting
• Output configuration: 3-State output
• Package type: 16-DIP (0.300", 7.62mm)
• Mounting method: Through Hole
• Supply voltage compatibility: Minimum 4.75V operation required

Functional Equivalence: The DM74LS365AN contains 6 elements with 1 bit per element. Substitute parts must provide equivalent buffering and 3-state control functionality within the same physical package footprint. The SN74LS365AN provides direct functional equivalence with identical electrical specifications. The CD74HCT365E provides functional equivalence with extended operating temperature range and improved output current characteristics, though it operates at a higher supply voltage range (4.5V ~ 5.5V).

Parameter Comparison

Engineering Selection Recommendations

SN74LS365AN (Direct Equivalent): This part provides identical electrical specifications and operating parameters to the DM74LS365AN. Both are 74LS series components with matching supply voltage ranges, output current ratings, and operating temperature limits. Selection of SN74LS365AN is appropriate for direct replacement in legacy systems where 74LS series compatibility is required. Note that this part is also classified as obsolete and carries RoHS non-compliant status.

CD74HCT365E (Extended Performance Alternative): This Texas Instruments 74HCT series component provides functional equivalence with extended operating temperature range (-55°C to 125°C versus 0°C to 70°C) and active product status. The CD74HCT365E operates across a wider supply voltage range (4.5V ~ 5.5V) and achieves ROHS3 compliance. Output current characteristics differ (4mA symmetric versus 2.6mA/24mA asymmetric), which may affect drive capability in specific circuit topologies. Selection of CD74HCT365E is appropriate for new designs or systems requiring extended temperature operation and regulatory compliance, provided circuit design accommodates the different output current specifications.

Frequently Asked Questions (FAQ)

Q: Can SN74LS365AN directly replace DM74LS365AN? A: Yes. Both parts are 74LS series buffers with identical electrical specifications, supply voltage requirements (4.75V ~ 5.25V), output current ratings (2.6mA, 24mA), and operating temperature range (0°C ~ 70°C). The 16-DIP package and through-hole mounting are identical. Pin-for-pin replacement is supported.

Q: What are the key differences between SN74LS365AN and CD74HCT365E? A: The primary differences are series classification (74LS versus 74HCT), operating temperature range (0°C ~ 70°C versus -55°C ~ 125°C), output current characteristics (2.6mA/24mA versus 4mA/4mA symmetric), and product status (obsolete versus active). Both provide 3-state buffering in 16-DIP packages. Supply voltage ranges differ slightly (4.75V ~ 5.25V versus 4.5V ~ 5.5V).

Q: Is the CD74HCT365E suitable for applications requiring the exact output current specifications of the DM74LS365AN? A: The CD74HCT365E provides symmetric output current (4mA high and low) compared to the asymmetric 2.6mA/24mA specification of the DM74LS365AN. Circuit designs dependent on the specific asymmetric current characteristics must be evaluated for compatibility. The different output impedance characteristics may affect signal integrity in certain topologies.

Q: Are there compliance or regulatory considerations when selecting a substitute? A: The DM74LS365AN and SN74LS365AN are both RoHS non-compliant. The CD74HCT365E is ROHS3 compliant. Systems subject to RoHS regulations should specify the CD74HCT365E. Both the DM74LS365AN and CD74HCT365E carry REACH Unaffected status.

Q: Can these parts be used interchangeably in existing PCB designs? A: All three parts use identical 16-DIP (0.300", 7.62mm) through-hole packaging and pin configurations. Physical PCB compatibility is supported. Electrical compatibility requires verification of supply voltage availability, output current requirements, and operating temperature conditions specific to the application circuit.