SN74LS32NS Equivalent & Substitute Parts

Part Overview

The SN74LS32NS is a 4-channel 2-input OR gate logic integrated circuit manufactured by Texas Instruments in the 74LS series. This component is classified as a discontinued product at DiGi Electronics, though inventory remains available. The SN74LS32NS operates within the standard TTL logic voltage range and is housed in a 14-pin surface mount SOIC package. Due to its discontinued status, identifying equivalent and substitute parts is essential for ongoing design support, production continuity, and long-term component sourcing strategies.

Substiute Parts

SN74LS32NS

Texas InstrumentsIn Stock: 3498SN74LS32NS Datasheet

Current PartRFQ

SN74LS32NSR

Texas InstrumentsIn Stock: 5170SN74LS32NSR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74LS32NS is determined by strict equivalence across the following critical parameters:

Logic Function & Circuit Configuration: The substitute part must provide identical OR gate functionality with 4 channels and 2 inputs per channel.

Electrical Specifications: Supply voltage range (4.75V ~ 5.25V), input logic levels (Low: 0.8V, High: 2V), propagation delay (22ns @ 5V, 15pF), and output current ratings (400µA High, 8mA Low) must match exactly.

Package & Mounting: The substitute must use the same 14-SOIC surface mount package with identical physical dimensions (0.209", 5.30mm Width).

Operating Temperature Range: The substitute must support the 0°C ~ 70°C operating temperature range.

Compliance & Environmental Standards: RoHS3 compliance and MSL Level 1 rating are required for equivalent substitution.

The SN74LS32NSR meets all these criteria and is classified as a direct substitute for the SN74LS32NS.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS32NSR is the direct substitute for the SN74LS32NS based on complete electrical and mechanical equivalence. The primary distinction between these parts is product status: the SN74LS32NS is discontinued at DiGi Electronics, while the SN74LS32NSR maintains active status with higher inventory availability (5094 Pcs vs. 3402 Pcs).

Both parts are manufactured by Texas Instruments, comply with ROHS3 standards, and carry identical electrical specifications and package configurations. The SN74LS32NSR is available in Cut Tape (CT) and Digi-Reel® packaging options, providing flexibility for different procurement and assembly workflows.

For new designs or production continuity, the SN74LS32NSR is the appropriate selection due to its active product status and sustained manufacturer support. Existing designs using the SN74LS32NS can transition to the SN74LS32NSR without circuit modification or re-qualification, as all functional and environmental parameters are identical.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS32NSR directly replace the SN74LS32NS in existing designs?

A: Yes. The SN74LS32NSR is electrically and mechanically identical to the SN74LS32NS. All logic function, electrical specifications, operating temperature range, and package dimensions are equivalent. No circuit modification is required.

Q: What is the primary reason for substitution?

A: The SN74LS32NS is discontinued at DiGi Electronics. The SN74LS32NSR maintains active product status with sustained manufacturer support and higher inventory availability, ensuring long-term component sourcing reliability.

Q: Are the packaging options different between these parts?

A: The SN74LS32NS is supplied in standard packaging, while the SN74LS32NSR is available in Cut Tape (CT) and Digi-Reel® formats. Both use the identical 14-SOIC package. The packaging format difference does not affect electrical performance or physical compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SN74LS32NS and SN74LS32NSR are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating. Both carry the same ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

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

A: Substitution is determined by equivalence in logic type (4-channel 2-input OR gate), supply voltage (4.75V ~ 5.25V), input logic levels (0.8V Low, 2V High), propagation delay (22ns @ 5V, 15pF), operating temperature range (0°C ~ 70°C), and 14-SOIC surface mount package configuration.