DM74S08N Equivalent & Substitute Parts

Part Overview

The DM74S08N is a 4-channel AND gate logic IC manufactured by onsemi in 14-MDIP packaging. This component implements four independent 2-input AND gates in a single 14-pin dual inline package. The DM74S08N is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The SN74S08N from Texas Instruments provides functional and electrical equivalence while maintaining active product status.

Substiute Parts

DM74S08N

onsemiIn Stock: 1849DM74S08N Datasheet

Current PartRFQ

SN74S08N

Texas InstrumentsIn Stock: 4067SN74S08N Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74S08N with the SN74S08N is valid based on the following criteria:

Electrical Equivalence: Both parts share identical logic function (4-channel AND gate), circuit count (4), input count (2 per gate), supply voltage range (4.75V ~ 5.25V), output current specifications (1mA high, 20mA low), and input logic levels (0.8V low, 2V high).

Mechanical Compatibility: Both components use 14-DIP through-hole packaging with 0.300" (7.62mm) pin spacing, enabling direct socket substitution without PCB modification.

Thermal Compatibility: Both parts operate across the same temperature range (0°C ~ 70°C).

Series Compatibility: Both parts belong to the 74S logic series, ensuring timing and functional compatibility within this standard logic family.

Parameter Comparison

Engineering Selection Recommendations

The SN74S08N from Texas Instruments is the direct substitute for the obsolete DM74S08N. Selection of the SN74S08N is supported by:

Product Status: The SN74S08N maintains active product status with established supply chains, whereas the DM74S08N is obsolete and subject to availability constraints.

Regulatory Compliance: The SN74S08N is ROHS3 compliant, meeting current environmental and regulatory requirements for new designs and production.

Electrical Performance: The SN74S08N demonstrates superior propagation delay (7.5ns versus 11ns at 5V, 50pF), providing improved timing margins in digital logic applications.

Packaging Compatibility: Both parts use identical 14-DIP through-hole packaging, enabling direct substitution without circuit board redesign.

Frequently Asked Questions (FAQ)

Q: Can the SN74S08N directly replace the DM74S08N without PCB modification?

A: Yes. Both parts use 14-DIP through-hole packaging with identical 0.300" (7.62mm) pin spacing. Direct socket substitution is possible without PCB changes.

Q: Are the electrical specifications identical between these parts?

A: The electrical specifications are equivalent. Both parts share identical supply voltage (4.75V ~ 5.25V), output current (1mA, 20mA), and input logic levels (0.8V low, 2V high). The SN74S08N exhibits faster propagation delay (7.5ns versus 11ns).

Q: Why is the DM74S08N listed as obsolete?

A: The DM74S08N is classified as obsolete by onsemi, indicating discontinued production and limited availability. The SN74S08N from Texas Instruments provides functional equivalence with active product status.

Q: What is the difference in propagation delay between these parts?

A: The SN74S08N has a maximum propagation delay of 7.5ns at 5V with 50pF load, compared to 11ns for the DM74S08N. This 4.6ns improvement provides faster logic switching, which may benefit timing-critical applications.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both the DM74S08N and SN74S08N operate across 0°C to 70°C, making them thermally compatible for identical application environments.

Q: What regulatory certifications apply to the SN74S08N?

A: The SN74S08N is ROHS3 compliant and REACH unaffected, meeting current environmental regulations for electronic components in new designs and production.