DM74LS11N Equivalent & Substitute Parts

Part Overview

The DM74LS11N is a 3-channel AND gate logic IC manufactured by onsemi in 14-MDIP packaging. This component implements three independent 3-input AND gates in a single 14-pin dual inline package. The part is classified as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

DM74LS11N

onsemiIn Stock: 3929DM74LS11N Datasheet

Current PartRFQ

SN74LS11N

Texas InstrumentsIn Stock: 14688SN74LS11N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74LS11N is determined by the following critical parameters:

• Logic function: 3-channel AND gate with 3 inputs per channel
• Supply voltage range: 4.75V ~ 5.25V
• Input/output logic levels: Low 0.8V, High 2V
• Output current capability: 400µA high, 8mA low
• Package type: 14-DIP through-hole configuration
• Operating temperature range: 0°C ~ 70°C
• Base product number: 74LS11

The SN74LS11N from Texas Instruments meets all functional and electrical requirements for direct substitution. Both parts share identical logic architecture, pin configuration, and core electrical specifications within the 74LS logic family.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS11N is the primary substitute for the DM74LS11N. Both parts are functionally equivalent with identical pin assignments and electrical characteristics within specified tolerances. The SN74LS11N offers the advantage of active product status and ROHS3 compliance, making it suitable for new designs and applications requiring regulatory compliance. The DM74LS11N remains available in existing inventory but is classified as obsolete.

Propagation delay specifications differ slightly between the two parts (18ns versus 20ns at 5V), but both operate within standard 74LS logic family timing parameters. The difference in load capacitance specifications (50pF versus 15pF) reflects measurement conditions and does not affect functional compatibility in typical applications.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS11N directly replace the DM74LS11N?

A: Yes. Both parts implement identical 3-channel AND gate logic with matching pin configurations, supply voltage requirements, input/output logic levels, and output current ratings. They are pin-for-pin compatible.

Q: Are there differences in propagation delay between these parts?

A: The DM74LS11N specifies 18ns maximum propagation delay at 5V with 50pF load, while the SN74LS11N specifies 20ns at 5V with 15pF load. Both values fall within standard 74LS logic family performance ranges and are functionally equivalent for most applications.

Q: What is the significance of the RoHS compliance difference?

A: The SN74LS11N is ROHS3 compliant, while the DM74LS11N is RoHS non-compliant. For applications subject to RoHS regulations or customer requirements, the SN74LS11N is the appropriate selection.

Q: Are the packages physically identical?

A: Yes. Both parts use 14-DIP (0.300", 7.62mm) through-hole packaging with identical pin spacing and mechanical dimensions, allowing direct board-level substitution.

Q: Why is the DM74LS11N classified as obsolete?

A: Obsolete status indicates the part is no longer in active production. The SN74LS11N from Texas Instruments remains in active production and is the recommended source for new procurement.