SN74HC161NG4 Equivalent & Substitute Parts

Part Overview

The SN74HC161NG4 is a 4-bit binary counter IC manufactured by Texas Instruments, designed for synchronous counting applications with positive edge triggering. This component features asynchronous reset capability and operates across a wide supply voltage range of 2V to 6V, making it suitable for both legacy and modern digital logic designs.

The SN74HC161NG4 is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives. Active substitute parts maintain identical electrical specifications and mechanical compatibility, ensuring direct replacement capability in existing designs without circuit modification.

Substiute Parts

SN74HC161NG4

Texas InstrumentsIn Stock: 946SN74HC161NG4 Datasheet

Current PartRFQ

SN74HC161N

Texas InstrumentsIn Stock: 13734SN74HC161N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74HC161NG4 is determined by strict equivalence across the following critical parameters:

• Logic Function: Binary counter with identical bit width (4-bit) and count direction (up)
• Electrical Performance: Matching count rate (36 MHz), trigger type (positive edge), and reset configuration (asynchronous)
• Voltage Specifications: Identical supply voltage range (2V to 6V) and operating temperature range (-40°C to 85°C)
• Mechanical Compatibility: Same package type (16-DIP, 0.300" pitch) and through-hole mounting
• Compliance: ROHS3 compliance and REACH unaffected status maintained

The SN74HC161N qualifies as a direct substitute based on complete alignment with all specified parameters. The primary distinction is product status and packaging format, with the substitute part currently in active production.

Parameter Comparison

Engineering Selection Recommendations

The SN74HC161N is the primary substitute for the discontinued SN74HC161NG4. Both parts maintain identical electrical and mechanical specifications, ensuring pin-for-pin compatibility and functional equivalence in all applications.

The SN74HC161N offers the advantage of active product status with higher inventory availability (13,652 units in stock versus 851 units for the original part). Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for current manufacturing standards.

Selection between these parts should be based on procurement availability and packaging requirements. The tube packaging format of the SN74HC161N is standard for active production inventory and presents no technical limitation for through-hole assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the SN74HC161N directly replace the SN74HC161NG4 without circuit modification?

A: Yes. The SN74HC161N is a direct pin-for-pin substitute with identical electrical specifications, supply voltage range, operating temperature range, and package dimensions. No circuit changes are required.

Q: What is the difference between the SN74HC161NG4 and SN74HC161N?

A: The primary differences are product status and packaging format. The SN74HC161NG4 is discontinued, while the SN74HC161N is in active production. The SN74HC161N is supplied in tube packaging, which is standard for active inventory. All electrical and mechanical parameters are identical.

Q: Are both parts ROHS3 compliant?

A: Yes. Both the SN74HC161NG4 and SN74HC161N are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

Q: What is the maximum count rate for these parts?

A: Both parts support a maximum count rate of 36 MHz, determined by the positive edge trigger configuration and synchronous timing architecture.

Q: Are these parts suitable for 3.3V logic systems?

A: Yes. Both parts operate across a supply voltage range of 2V to 6V, which includes standard 3.3V and 5V logic levels. Verify that input and output voltage levels are compatible with your specific logic family requirements.

Q: What is the package pitch for the 16-DIP configuration?

A: The package pitch is 0.300 inches (7.62mm), which is the standard DIP spacing for through-hole assembly on conventional PCB layouts.