SN74F299NSR Equivalent & Substitute Parts

Part Overview

The SN74F299NSR is a universal shift register IC manufactured by Texas Instruments, featuring 1 element with 8 bits per element in a 20-SOIC surface mount package. This component functions as a multiplexed shift/storage register with tri-state output capability, operating within the 4.5V to 5.5V supply voltage range and 0°C to 70°C temperature range.

The SN74F299NSR is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this logic component.

Substiute Parts

SN74F299NSR

Texas InstrumentsIn Stock: 1130SN74F299NSR Datasheet

Current PartRFQ

SN74F299NS

Texas InstrumentsIn Stock: 1709SN74F299NS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74F299NSR is determined by strict equivalence across the following critical parameters:

• Logic Type: Shift Register
• Output Type: Tri-State
• Number of Elements: 1
• Number of Bits per Element: 8
• Function: Universal
• Voltage - Supply: 4.5V ~ 5.5V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 20-SOIC (0.209", 5.30mm Width)
• Series: 74F

The SN74F299NS qualifies as a direct substitute based on complete alignment with these parameters. Both parts share identical electrical specifications, functional characteristics, and physical packaging requirements. The primary distinction is product status: SN74F299NSR is obsolete while SN74F299NS is active, making SN74F299NS the recommended alternative for new designs and ongoing supply requirements.

Parameter Comparison

Engineering Selection Recommendations

The SN74F299NS is the appropriate substitute for the obsolete SN74F299NSR. Both components are manufactured by Texas Instruments and maintain identical electrical and mechanical specifications across all critical parameters. The SN74F299NS carries active product status, ensuring ongoing availability and support from the manufacturer.

Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings, confirming compatibility with current manufacturing and environmental standards. The transition from SN74F299NSR to SN74F299NS requires no circuit redesign, PCB layout modification, or firmware adjustment, as pin configuration, electrical performance, and functional behavior remain unchanged.

Frequently Asked Questions (FAQ)

Q: Can SN74F299NS be used as a direct replacement for SN74F299NSR in existing designs?

A: Yes. The SN74F299NS is a direct substitute. All electrical parameters, pin configurations, functional characteristics, and package specifications are identical. No circuit modifications are required.

Q: What is the primary reason for substitution?

A: The SN74F299NSR is classified as obsolete. The SN74F299NS is the active equivalent from the same manufacturer, ensuring continued supply chain availability and manufacturer support.

Q: Are there any differences in packaging between these parts?

A: No. Both parts use the 20-SOIC (0.209", 5.30mm Width) surface mount package. PCB footprints and assembly processes remain unchanged.

Q: Do both parts meet the same compliance standards?

A: Yes. Both SN74F299NSR and SN74F299NS are ROHS3 compliant with MSL rating of 1 (Unlimited), confirming equivalent environmental and regulatory compliance.

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

A: Substitution is determined by matching logic type (Shift Register), output type (Tri-State), element count (1), bit count per element (8), function (Universal), supply voltage (4.5V ~ 5.5V), operating temperature range (0°C ~ 70°C), and package specification (20-SOIC).