SN74F299DW Equivalent & Substitute Parts

Part Overview

The SN74F299DW is a universal shift/storage register logic IC manufactured by Texas Instruments, housed in a 20-SOIC surface mount package. This component functions as a 1-element, 8-bit shift register with tri-state output capability, operating within a 4.5V to 5.5V supply voltage range and a 0°C to 70°C temperature range. The part is currently in Last Time Buy status, indicating discontinued production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for existing applications or redesigns requiring this functional category.

Substiute Parts

SN74F299DW

Texas InstrumentsIn Stock: 1560SN74F299DW Datasheet

Current PartRFQ

SN74F299DWR

Texas InstrumentsIn Stock: 3141SN74F299DWR Datasheet

MFR RecommendedRFQ

SN74ALS299DW

Texas InstrumentsIn Stock: 1038SN74ALS299DW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74F299DW are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Logic Type: Shift Register
• Number of Elements: 1
• Number of Bits per Element: 8
• Function: Universal
• Output Type: Tri-State
• Voltage - Supply: 4.5V ~ 5.5V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

Substitution Categories:

1. MFR Recommended Substitute (SN74F299DWR): Identical electrical specifications and package. Differs only in packaging format (Tape & Reel vs. Tube) and product status (Active vs. Last Time Buy). This substitute maintains the same 74F series logic family.

2. Parametric Equivalent (SN74ALS299DW): Matches all critical electrical and mechanical parameters. Differs in logic series (74ALS vs. 74F), which represents a different technology node within the same functional category. Both series operate within identical voltage and temperature ranges and share the same package specification.

Parameter Comparison

Engineering Selection Recommendations

SN74F299DWR (MFR Recommended Substitute): This part is the primary substitute for the SN74F299DW. It maintains identical electrical and mechanical specifications while offering Active product status, ensuring long-term availability. The only difference is packaging format: Tape & Reel versus Tube. Selection of this substitute is appropriate for high-volume production environments where Tape & Reel packaging is standard. Both parts carry ROHS3 compliance and REACH Unaffected status, meeting regulatory requirements.

SN74ALS299DW (Parametric Equivalent): This part provides functional equivalence across all critical parameters: logic type, bit configuration, output characteristics, voltage range, temperature range, and package specification. The 74ALS series represents an alternative technology node within the TTL logic family. This substitute is suitable when 74ALS series components are already established in the design or supply chain. Product status is Active, ensuring availability. Regulatory compliance (ROHS3, REACH Unaffected) matches the main part.

Selection Basis:

• Both substitutes maintain identical functional and electrical specifications
• Both are manufactured by Texas Instruments
• Both carry equivalent regulatory compliance certifications
• Primary differentiation is product status (Active vs. Last Time Buy) and packaging format
• Series selection (74F vs. 74ALS) depends on existing design architecture and supply chain standardization

Frequently Asked Questions (FAQ)

Q: Can SN74F299DWR be used as a direct replacement for SN74F299DW? A: Yes. Both parts are electrically and mechanically identical. The only difference is packaging format: SN74F299DWR uses Tape & Reel packaging while SN74F299DW uses Tube packaging. Functional performance and pin configuration are identical.

Q: What is the difference between the 74F and 74ALS series? A: Both are TTL logic families that meet the same electrical specifications for this part (voltage range, temperature range, and functional characteristics). The 74ALS series represents a different technology node. For this specific shift register function, both series provide equivalent performance within the specified operating parameters.

Q: Is SN74ALS299DW a suitable substitute for SN74F299DW? A: Yes. The SN74ALS299DW matches all critical parameters: 1-element, 8-bit universal shift register with tri-state output, 4.5V to 5.5V supply, 0°C to 70°C operating temperature, and 20-SOIC package. Series differences do not affect substitution eligibility for this application.

Q: Why is SN74F299DW marked as Last Time Buy? A: Last Time Buy status indicates the manufacturer has discontinued production. This necessitates identifying active substitute parts to maintain supply chain continuity. Both recommended substitutes carry Active status.

Q: Are there packaging considerations when switching between Tube and Tape & Reel formats? A: Yes. Tube packaging is typically used for lower-volume or manual assembly processes, while Tape & Reel is standard for automated pick-and-place assembly. The physical component and electrical specifications remain identical; only the delivery and handling format differs.

Q: Do all three parts meet the same regulatory requirements? A: Yes. SN74F299DW, SN74F299DWR, and SN74ALS299DW are all ROHS3 Compliant, REACH Unaffected, and carry MSL Level 1 (Unlimited) moisture sensitivity rating.

Q: Can I mix SN74F299DW and SN74ALS299DW in the same circuit? A: Yes, provided the circuit design accommodates both series. Both parts meet identical electrical specifications for voltage, temperature, and functional characteristics. Pin configuration and package are identical.