SN74ALS299DWR Equivalent & Substitute Parts

Part Overview

The SN74ALS299DWR is an 8-bit universal shift register manufactured by Texas Instruments in the 74ALS logic family. This component functions as a shift/storage register with tri-state output capability, housed in a 20-pin SOIC surface mount package. The part is classified as obsolete, making identification of compatible substitutes essential for ongoing system support and procurement planning. Active alternatives within the same functional category and electrical specifications are available to ensure design continuity.

Substiute Parts

SN74ALS299DWR

Texas InstrumentsIn Stock: 2587SN74ALS299DWR Datasheet

Current PartRFQ

SN74F299DWR

Texas InstrumentsIn Stock: 3141SN74F299DWR Datasheet

Parametric EquivalentRFQ

SN74ALS299DW

Texas InstrumentsIn Stock: 1038SN74ALS299DW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74ALS299DWR is determined by strict equivalence across the following critical parameters:

• Logic Type & Function: Must be shift register with universal function capability
• Bit Configuration: 1 element, 8 bits per element
• Output Architecture: Tri-state output required
• Electrical Specifications: Supply voltage 4.5V ~ 5.5V, operating temperature 0°C ~ 70°C
• Physical Package: 20-SOIC form factor with identical pin count and spacing
• Compliance: ROHS3 compliance and EAR99 classification maintained

Two substitute parts meet these criteria: the SN74F299DWR (parametric equivalent from the 74F logic family) and the SN74ALS299DW (manufacturer-recommended variant within the same 74ALS series).

Parameter Comparison

Engineering Selection Recommendations

SN74F299DWR is classified as a parametric equivalent and represents the primary substitute option. This part maintains identical electrical and mechanical specifications while belonging to the 74F logic family. The SN74F299DWR carries active product status, ensuring long-term availability and supply chain stability. Both parts are ROHS3 compliant and carry EAR99 classification.

SN74ALS299DW is the manufacturer-recommended alternative within the same 74ALS logic series as the original part. This variant shares the identical base product number (74ALS299) and maintains all critical electrical parameters. The primary distinction is packaging format: the SN74ALS299DW is supplied in tube packaging versus the tape & reel format of the SN74ALS299DWR. This part also maintains active product status and full compliance certifications.

Selection between these substitutes should be based on supply chain availability, packaging requirements for assembly processes, and any existing inventory of compatible components within the 74ALS or 74F logic families.

Frequently Asked Questions (FAQ)

Q: Can the SN74F299DWR directly replace the SN74ALS299DWR in existing designs?

A: Yes. Both parts share identical electrical specifications (supply voltage, operating temperature range, logic function), output architecture (tri-state), and physical package (20-SOIC). Pin-to-pin compatibility is maintained across all functional parameters.

Q: What is the difference between the SN74ALS299DW and SN74ALS299DWR?

A: Both parts are from the 74ALS series with identical electrical and functional specifications. The primary difference is packaging format: the SN74ALS299DW is supplied in tube packaging, while the SN74ALS299DWR uses tape & reel format. Selection depends on assembly process requirements and handling procedures.

Q: Why is the SN74ALS299DWR marked as obsolete?

A: Obsolete status indicates the manufacturer has discontinued active production. However, active substitutes with identical specifications remain available through the SN74F299DWR and SN74ALS299DW, ensuring design continuity and system support.

Q: Are all three parts ROHS3 compliant?

A: Yes. The SN74ALS299DWR, SN74F299DWR, and SN74ALS299DW are all ROHS3 compliant with moisture sensitivity level 1 (unlimited), meeting current environmental and regulatory requirements.

Q: Can these parts be used interchangeably in high-speed applications?

A: Substitution eligibility is based on the provided electrical parameters (supply voltage, operating temperature, logic function, and output type). Timing characteristics and propagation delays specific to each logic family (74ALS versus 74F) are not included in the provided specifications and must be evaluated separately against application requirements.