DM74LS169AM Equivalent & Substitute Parts

Part Overview

The DM74LS169AM is a 4-bit binary counter IC manufactured by onsemi, housed in a 16-SOIC surface mount package. This device functions as a synchronous up/down counter with positive edge triggering and a maximum count rate of 25 MHz. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

DM74LS169AM

onsemiIn Stock: 991DM74LS169AM Datasheet

Current PartRFQ

SN74LS169BD

Texas InstrumentsIn Stock: 1177SN74LS169BD Datasheet

Parametric EquivalentRFQ

SN74LS191D

Texas InstrumentsIn Stock: 1533SN74LS191D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DM74LS169AM is determined by strict equivalence across the following parameters:

• Logic Type: Binary Counter
• Number of Bits per Element: 4 bits
• Direction: Up/Down capability
• Timing: Synchronous operation
• Trigger Type: Positive Edge
• Count Rate: 25 MHz minimum
• Voltage Supply Range: 4.75 V ~ 5.25 V
• Package: 16-SOIC form factor
• Mounting Type: Surface Mount

Both identified substitute parts meet all these criteria and are therefore considered parametric equivalents suitable for direct replacement in applications requiring the DM74LS169AM functionality.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS169BD manufactured by Texas Instruments is the primary substitute for the obsolete DM74LS169AM. This part maintains active product status and carries ROHS3 compliance certification, ensuring long-term availability and regulatory alignment for new designs and production runs.

The SN74LS191D, also from Texas Instruments, serves as a secondary equivalent with identical electrical and mechanical specifications. However, this part is designated as Last Time Buy, indicating limited future availability. Selection of this part should be reserved for applications where existing inventory or design constraints necessitate its use.

Both substitute parts are available in higher quantities than the original DM74LS169AM, supporting production scalability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS169BD directly replace the DM74LS169AM without circuit modifications?

A: Yes. The SN74LS169BD is a parametric equivalent with identical electrical specifications, pin configuration, and 16-SOIC package dimensions. Direct substitution is supported without circuit redesign.

Q: What is the difference between the SN74LS169BD and SN74LS191D?

A: Both parts are parametric equivalents with identical electrical and mechanical characteristics. The primary distinction is product status: the SN74LS169BD is active, while the SN74LS191D is Last Time Buy. For new designs, the SN74LS169BD is the recommended choice.

Q: Are there any compliance or certification differences between these parts?

A: All three parts share identical REACH and ECCN classifications. The SN74LS169BD and SN74LS191D both carry ROHS3 compliance certification, while the original DM74LS169AM does not specify this certification.

Q: Is the 16-SOIC package identical across all three parts?

A: Yes. All parts use the 16-SOIC (0.154", 3.90mm Width) surface mount package with identical pin assignments and mechanical dimensions.

Q: Why is the DM74LS169AM classified as obsolete?

A: Obsolescence reflects the manufacturer's discontinuation of this part number. Equivalent alternatives from active manufacturers ensure continued design support and component availability.