SN74LS670DR Equivalent & Substitute Parts

Part Overview

The SN74LS670DR is a Register File logic integrated circuit manufactured by Texas Instruments, configured as a 1 x 1:1 register file with 4 independent circuits. This component is classified as obsolete and operates under single supply voltage conditions. Due to its obsolete product status, identifying functionally equivalent substitute parts is essential for design continuity and procurement planning in applications requiring register file functionality with identical electrical and mechanical specifications.

Substiute Parts

SN74LS670DR

Texas InstrumentsIn Stock: 15267SN74LS670DR Datasheet

Current PartRFQ

SN74LS670D

onsemiIn Stock: 16307SN74LS670D Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74LS670DR are identified based on strict equivalence across the following critical parameters:

• Circuit configuration (1 x 1:1 register file)
• Independent circuits count (4)
• Package type (16-SOIC with 0.154" width, 3.90mm)
• Mounting type (Surface Mount)
• Voltage supply range (4.75V ~ 5.25V)
• Operating temperature range (0°C ~ 70°C)
• Output current specifications (2.6mA high, 8mA low)
• Series designation (74LS)

The SN74LS670D from onsemi meets all electrical and mechanical substitution criteria for the SN74LS670DR.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS670D from onsemi is a direct functional equivalent to the SN74LS670DR. Both components share identical electrical characteristics, circuit configuration, and mechanical specifications. Selection between these parts should be based on the following factors:

RoHS Compliance Status: The SN74LS670DR carries ROHS3 Compliant certification, while the SN74LS670D is RoHS non-compliant. Applications subject to RoHS regulatory requirements must use the SN74LS670DR or identify alternative compliant solutions.

Packaging: The SN74LS670DR is supplied in standard packaging, while the SN74LS670D is supplied in Tube packaging. Procurement requirements and handling procedures may differ accordingly.

Availability: Both parts are listed as obsolete. Current inventory levels should be verified with suppliers before finalizing component selection for production applications.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS670D directly replace the SN74LS670DR in existing designs?

A: Yes, from an electrical and mechanical standpoint. Both components have identical circuit configurations, voltage supply ranges, operating temperatures, and output current specifications. However, RoHS compliance status differs between the two parts. Designs subject to RoHS requirements must use the SN74LS670DR.

Q: Are there any package compatibility concerns between these parts?

A: No. Both the SN74LS670DR and SN74LS670D use the 16-SOIC package with identical dimensions (0.154" width, 3.90mm). Pin-to-pin compatibility is guaranteed, and PCB layouts require no modification.

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

A: Both parts are classified as obsolete, indicating that manufacturers have discontinued active production. Existing inventory may be available through authorized distributors, but long-term availability cannot be guaranteed. Design teams should evaluate alternative modern register file solutions for new product development.

Q: How do the packaging formats (standard vs. Tube) affect component selection?

A: Packaging format affects handling, storage, and automated assembly processes. Tube packaging typically accommodates pick-and-place equipment used in high-volume manufacturing. Standard packaging may be suitable for lower-volume or manual assembly operations. Verify compatibility with your assembly process before selection.

Q: Are there compliance or certification differences between these parts?

A: Yes. The SN74LS670DR is ROHS3 Compliant with Moisture Sensitivity Level (MSL) 1 (Unlimited). The SN74LS670D is RoHS non-compliant. Both parts carry EAR99 ECCN classification and share identical HTSUS codes. Applications in regulated industries or regions with RoHS mandates must account for these differences.