SN74LS20NG4 Equivalent & Substitute Parts

Part Overview

The SN74LS20NG4 is a NAND Gate IC featuring 2 channels with 4 inputs per channel in a 14-PDIP package. Manufactured by Texas Instruments, this logic component operates within the 74LS TTL family and is designed for digital logic applications requiring NAND gate functionality. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

SN74LS20NG4

Texas InstrumentsIn Stock: 1145SN74LS20NG4 Datasheet

Current PartRFQ

SN74LS20N

MotorolaIn Stock: 4506SN74LS20N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74LS20NG4 is determined by strict equivalence across the following critical parameters:

• Logic Type: NAND Gate configuration
• Number of Circuits: 2 channels
• Number of Inputs: 4 inputs per channel
• Voltage Supply Range: 4.75V ~ 5.25V
• Output Current Specifications: 400µA (high), 8mA (low)
• Input Logic Levels: 0.8V (low), 2V (high)
• Propagation Delay: 15ns @ 5V, 15pF
• Operating Temperature Range: 0°C ~ 70°C
• Package Type: 14-DIP through-hole configuration
• Series Family: 74LS

The SN74LS20N from Motorola meets all electrical and mechanical specifications required for direct substitution with the SN74LS20NG4.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS20N is a direct functional equivalent to the SN74LS20NG4. Both parts share identical electrical characteristics, logic configuration, and physical packaging. The primary distinction is product status and compliance certification.

The SN74LS20NG4 is ROHS3 compliant and REACH unaffected. The SN74LS20N is RoHS non-compliant and marked as obsolete. Selection between these parts depends on regulatory requirements for your application. If RoHS3 compliance is mandatory, the SN74LS20NG4 remains the preferred choice where available. If RoHS compliance is not required and the SN74LS20N is available in inventory, it provides functional equivalence for legacy system maintenance or non-regulated applications.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS20N replace the SN74LS20NG4 in my circuit?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters including logic function, voltage supply, output current, propagation delay, and 14-DIP package configuration. Substitution is valid from a functional standpoint.

Q: What is the difference between these two parts?

A: The primary differences are manufacturer (Texas Instruments vs. Motorola), product status (discontinued vs. obsolete), and compliance certification (ROHS3 compliant vs. RoHS non-compliant). Electrical and mechanical specifications are identical.

Q: Does the RoHS compliance difference affect compatibility?

A: RoHS compliance affects regulatory acceptance and environmental standards, not electrical function. If your application or market requires RoHS3 certification, use the SN74LS20NG4. If RoHS compliance is not a requirement, the SN74LS20N functions identically.

Q: Are there any package differences between these parts?

A: No. Both parts use the 14-DIP (0.300", 7.62mm) through-hole package with identical pin configuration and mechanical dimensions.

Q: Can I use these parts interchangeably in production?

A: Yes, provided compliance requirements are met. Verify that your application and target market do not mandate RoHS certification. If they do, the SN74LS20NG4 is required. For non-regulated applications, either part provides equivalent functionality.