DM74LS163AN Equivalent & Substitute Parts

Part Overview

The DM74LS163AN is a 4-bit binary counter IC manufactured by onsemi, housed in a 16-DIP package. This component functions as a synchronous, positive-edge-triggered counter with synchronous reset capability. The part is classified as obsolete, which necessitates identification of equivalent alternatives for ongoing design support and procurement continuity. Active substitute parts maintain functional and electrical compatibility while offering improved availability and compliance status.

Substiute Parts

DM74LS163AN

onsemiIn Stock: 2186DM74LS163AN Datasheet

Current PartRFQ

SN74LS163AN

Texas InstrumentsIn Stock: 2162SN74LS163AN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74LS163AN is determined by strict equivalence across the following critical parameters:

• Logic Function: Binary counter with identical bit width (4-bit) and count direction (up)
• Trigger and Reset Characteristics: Positive edge trigger with synchronous reset
• Electrical Specifications: Supply voltage range 4.75 V ~ 5.25 V and operating temperature 0°C ~ 70°C
• Physical Package: 16-DIP form factor with 0.300" (7.62mm) pitch for through-hole mounting
• Series Classification: 74LS logic family

The SN74LS163AN from Texas Instruments satisfies all these criteria, providing direct functional and pin-level compatibility with the DM74LS163AN.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS163AN is the direct equivalent for the DM74LS163AN. Both parts share identical functional specifications, electrical parameters, and physical packaging. The primary distinction is product lifecycle status: the DM74LS163AN is obsolete, while the SN74LS163AN maintains active production status from Texas Instruments.

The SN74LS163AN additionally provides ROHS3 compliance, addressing regulatory requirements for new designs and procurement cycles. The Texas Instruments variant is the recommended selection for applications requiring long-term availability and compliance certification.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS163AN directly replace the DM74LS163AN in existing designs?

A: Yes. Both parts are 74LS163 binary counters with identical pin configurations, electrical specifications, and functional behavior. No circuit modifications are required for substitution.

Q: Are there differences in performance between these parts?

A: No performance differences exist. Both parts operate within the same supply voltage range (4.75 V ~ 5.25 V), temperature range (0°C ~ 70°C), and timing specifications. The SN74LS163AN includes a specified count rate of 25 MHz.

Q: Why is the DM74LS163AN listed as obsolete?

A: Obsolete status indicates the part is no longer in active production by onsemi. The SN74LS163AN from Texas Instruments remains in active production and serves as the recommended alternative for new procurement.

Q: Does the packaging differ between these parts?

A: No. Both parts use the 16-DIP (0.300", 7.62mm) through-hole package. They are mechanically and electrically interchangeable on PCBs designed for this form factor.

Q: What is the significance of ROHS3 compliance on the SN74LS163AN?

A: ROHS3 compliance certifies that the SN74LS163AN meets Restriction of Hazardous Substances regulations. This is relevant for applications subject to environmental and regulatory compliance requirements. The obsolete DM74LS163AN carries RoHS non-compliant status.