SN74LS156NG4 Equivalent & Substitute Parts

Part Overview

The SN74LS156NG4 is a Decoder/Demultiplexer logic integrated circuit manufactured by Texas Instruments, featuring a 2 x 1:4 circuit configuration in a 16-pin DIP package. This component is classified as discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design requirements and component procurement. The part operates on single supply voltage and is suitable for applications requiring decoder or demultiplexer functionality in digital logic systems.

Substiute Parts

SN74LS156NG4

Texas InstrumentsIn Stock: 1213SN74LS156NG4 Datasheet

Current PartRFQ

SN74LS156N

Texas InstrumentsIn Stock: 3457SN74LS156N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74LS156NG4 is determined by strict equivalence across the following critical parameters:

• Circuit configuration: 2 x 1:4 decoder/demultiplexer topology
• Package type: 16-DIP (0.300", 7.62mm) through-hole mounting
• Voltage supply range: 4.75V ~ 5.25V single supply
• Output current specifications: 100µA high, 8mA low
• Operating temperature range: 0°C ~ 70°C
• Base product series: 74LS logic family

The SN74LS156N qualifies as a direct substitute based on identical electrical specifications, circuit configuration, and package format. The primary distinction is product status and packaging format (tube vs. standard packaging).

Parameter Comparison

Engineering Selection Recommendations

The SN74LS156N is the direct equivalent substitute for the SN74LS156NG4. Both components share identical electrical characteristics, circuit topology, and physical package specifications. The SN74LS156N maintains active product status with higher inventory availability (3440 pcs vs. 1134 pcs), ensuring supply chain continuity. Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. Selection of the SN74LS156N eliminates obsolescence risk while maintaining full functional and mechanical compatibility with existing designs.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS156N directly replace the SN74LS156NG4 in existing designs?

A: Yes. Both parts are electrically and mechanically identical. They share the same 16-DIP package, voltage supply range (4.75V ~ 5.25V), output current specifications (100µA, 8mA), and operating temperature range (0°C ~ 70°C). No circuit modifications are required.

Q: What is the difference between SN74LS156NG4 and SN74LS156N?

A: The primary differences are packaging format (standard vs. tube) and product status. The SN74LS156NG4 is discontinued at DiGi Electronics, while the SN74LS156N maintains active status with higher inventory levels. Electrical and functional specifications are identical.

Q: Are both parts RoHS compliant?

A: Yes. Both the SN74LS156NG4 and SN74LS156N are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the 16-DIP package specification?

A: The 16-DIP package is a through-hole dual inline package measuring 0.300 inches (7.62mm) in width. This standard package format is compatible with conventional PCB through-hole assembly processes.

Q: Can these parts operate at different voltage levels?

A: No. Both parts operate within the specified single supply voltage range of 4.75V ~ 5.25V. Operation outside this range is not supported.