DM74LS161AN Equivalent & Substitute Parts

Part Overview

The DM74LS161AN is a 4-bit binary counter IC manufactured by onsemi, housed in a 16-DIP package. This component functions as a synchronous counter with positive edge triggering and asynchronous reset capability. The part is classified as obsolete, making identification of compatible substitutes essential for ongoing system maintenance and new design implementations where legacy component compatibility is required.

Substiute Parts

DM74LS161AN

onsemiIn Stock: 1209DM74LS161AN Datasheet

Current PartRFQ

SN74LS161AN

Texas InstrumentsIn Stock: 2420SN74LS161AN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74LS161AN is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Base product number: 74LS161
• Logic type: Binary Counter
• Number of bits: 4-bit
• Trigger type: Positive Edge
• Reset type: Asynchronous
• Timing: Synchronous
• Supply voltage range: 4.75 V ~ 5.25 V
• Operating temperature range: 0°C ~ 70°C
• Package type: 16-DIP through-hole configuration

The SN74LS161AN from Texas Instruments meets all critical electrical specifications and maintains identical pinout compatibility within the 16-DIP package format, qualifying it as a direct functional substitute.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS161AN from Texas Instruments is the direct equivalent substitute for the DM74LS161AN. Both components share identical electrical specifications, pinout configuration, and package format. The primary distinction is product status: the DM74LS161AN is obsolete while the SN74LS161AN maintains active production status.

For applications requiring the 74LS161 4-bit binary counter functionality, the SN74LS161AN provides continuity of supply and ongoing manufacturer support. Both parts maintain REACH compliance and are suitable for through-hole PCB assembly in systems operating within the specified voltage and temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS161AN directly replace the DM74LS161AN in existing designs?

A: Yes. The SN74LS161AN is a direct pin-for-pin equivalent with identical electrical characteristics, supply voltage requirements, operating temperature range, and 16-DIP package configuration. No circuit modifications are required.

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

A: The DM74LS161AN is classified as obsolete, indicating onsemi has discontinued production. The SN74LS161AN maintains active status from Texas Instruments, ensuring ongoing availability and manufacturer support for new procurements and system maintenance.

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

A: Both components maintain REACH Unaffected status. Compliance certifications are equivalent for both substitutes.

Q: Does the 16-DIP through-hole package remain the same?

A: Yes. Both the DM74LS161AN and SN74LS161AN use identical 16-DIP (0.300", 7.62mm) through-hole packaging, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Q: What are the critical electrical parameters that define substitution eligibility?

A: Substitution is determined by matching the 4-bit binary counter logic type, positive edge trigger, asynchronous reset, synchronous timing, 4.75 V ~ 5.25 V supply voltage range, and 0°C ~ 70°C operating temperature specification. The SN74LS161AN meets all these requirements.