SN74ALS992NTG4 Equivalent & Substitute Parts

Part Overview

The SN74ALS992NTG4 is a D-Type Transparent Latch IC with 9-bit configuration and tri-state output, manufactured by Texas Instruments in the 74ALS logic series. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement. The part operates within a 4.5V to 5.5V supply voltage range and is housed in a 24-DIP through-hole package.

Substiute Parts

SN74ALS992NTG4

Texas InstrumentsIn Stock: 735SN74ALS992NTG4 Datasheet

Current PartRFQ

SN74ALS992DW

Texas InstrumentsIn Stock: 1079SN74ALS992DW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74ALS992NTG4 is determined by strict equivalence across the following critical parameters:

• Logic Function: D-Type Transparent Latch with identical 9:9 circuit configuration
• Electrical Characteristics: Matching supply voltage range (4.5V ~ 5.5V), propagation delay (6ns), and output current specifications (400µA, 8mA)
• Output Architecture: Tri-state output capability
• Compliance & Certification: ROHS3 compliance, REACH unaffected status, and MSL rating of 1

The primary distinction between the main part and its substitute lies in the packaging format and mounting technology. The SN74ALS992DW maintains identical electrical performance while offering an alternative surface-mount package option.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS992DW serves as the direct functional equivalent to the SN74ALS992NTG4. Both components are manufactured by Texas Instruments and maintain identical electrical specifications, logic function, and compliance certifications. The SN74ALS992DW holds active product status, ensuring continued availability and manufacturing support, whereas the SN74ALS992NTG4 is classified as obsolete.

Selection between these parts depends on board-level design requirements. The SN74ALS992NTG4 utilizes through-hole mounting in a 24-DIP package, suitable for breadboard prototyping and legacy PCB designs. The SN74ALS992DW employs surface-mount technology in a 24-SOIC package, appropriate for modern high-density PCB layouts and automated assembly processes. Both components satisfy ROHS3 compliance and REACH regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS992DW directly replace the SN74ALS992NTG4 in existing designs?

A: Electrical substitution is complete. The SN74ALS992DW maintains identical logic function, supply voltage range, propagation delay, and output current specifications. Physical substitution requires PCB redesign due to package format differences: 24-DIP (through-hole) versus 24-SOIC (surface-mount).

Q: Why is the SN74ALS992NTG4 classified as obsolete?

A: The part is no longer in active production. The SN74ALS992DW represents the current active equivalent in the 74ALS992 product line.

Q: Are there compliance differences between these parts?

A: No. Both components are ROHS3 compliant, REACH unaffected, and carry identical MSL ratings of 1 (Unlimited).

Q: What are the package dimension differences?

A: The SN74ALS992NTG4 is packaged in 24-DIP format measuring 0.300" (7.62mm). The SN74ALS992DW uses 24-SOIC format measuring 0.295" (7.50mm) in width. These are distinct physical packages requiring different PCB footprints.

Q: Do both parts operate at the same temperature range?

A: Yes. Both components operate across 0°C to 70°C, with identical propagation delay and output current characteristics throughout this range.