DM74LS165N Equivalent & Substitute Parts

Part Overview

The DM74LS165N is an 8-bit parallel-in/serial-out shift register manufactured by onsemi, housed in a 16-pin DIP package. This component functions as a parallel or serial to serial converter within the 74LS logic family. The part is currently classified as obsolete, making identification of compatible substitutes essential for ongoing system support and component procurement.

Substiute Parts

DM74LS165N

onsemiIn Stock: 1449DM74LS165N Datasheet

Current PartRFQ

SN74LS165AN

Texas InstrumentsIn Stock: 2230SN74LS165AN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74LS165N is determined by strict equivalence across the following parameters:

• Logic Type: Shift Register
• Number of Elements: 1
• Number of Bits per Element: 8
• Function: Parallel or Serial to Serial
• Output Type: Complementary
• Voltage - Supply: 4.75V ~ 5.25V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 16-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole
• Series: 74LS

The SN74LS165AN from Texas Instruments meets all these criteria and is therefore a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS165AN is a direct substitute for the DM74LS165N based on identical electrical and mechanical specifications. The primary distinction is product status: the DM74LS165N is obsolete while the SN74LS165AN remains active in production. Additionally, the SN74LS165AN carries ROHS3 compliance, whereas the DM74LS165N is non-compliant. For new designs or system replacements, the SN74LS165AN is the appropriate selection due to its active status and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS165AN directly replace the DM74LS165N in existing circuits?

A: Yes. Both parts share identical electrical specifications (voltage supply, operating temperature, logic function) and mechanical packaging (16-DIP through-hole). No circuit modifications are required.

Q: What is the significance of the product status difference?

A: The DM74LS165N is classified as obsolete, indicating onsemi no longer manufactures or supports this part. The SN74LS165AN is active, ensuring ongoing availability and manufacturer support from Texas Instruments.

Q: Does the RoHS compliance difference affect compatibility?

A: RoHS compliance relates to material composition and environmental regulations, not functional performance. Both parts operate identically within the specified electrical parameters. The ROHS3 compliance of the SN74LS165AN may be required for applications subject to environmental regulations.

Q: Are there packaging differences between these parts?

A: Both parts use 16-DIP (0.300", 7.62mm) through-hole packaging. They are mechanically and electrically interchangeable in PCB layouts designed for this package type.

Q: What inventory considerations should be evaluated?

A: The DM74LS165N has 1400 pieces available as new original stock. The SN74LS165AN has 2200 pieces available. For long-term system support, the active status and higher inventory of the SN74LS165AN provide greater procurement reliability.