SN74ALS573CDW Equivalent & Substitute Parts

Part Overview

The SN74ALS573CDW is a D-Type Transparent Latch logic IC manufactured by Texas Instruments, featuring a single 8:8 channel configuration with tri-state output capability. This component is classified as Last Time Buy, indicating discontinued production with limited availability. The identification of equivalent substitute parts is necessary to ensure design continuity and procurement flexibility for applications requiring this logic function.

Substiute Parts

SN74ALS573CDW

Texas InstrumentsIn Stock: 2255SN74ALS573CDW Datasheet

Current PartRFQ

SN74ALS573CDWR

Texas InstrumentsIn Stock: 2822SN74ALS573CDWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74ALS573CDW is determined by strict equivalence across the following critical parameters:

• Logic Type: D-Type Transparent Latch (functional architecture must remain identical)
• Circuit Configuration: 8:8 channel arrangement (pin count and signal routing must match)
• Output Type: Tri-State (electrical output characteristics must be preserved)
• Voltage Supply Range: 4.5V ~ 5.5V (power supply compatibility)
• Propagation Delay Time: 2ns (timing specifications)
• Output Current Ratings: 2.6mA (high) / 24mA (low) (drive capability)
• Operating Temperature Range: 0°C ~ 70°C (thermal operating window)
• Package Type: 20-SOIC form factor (physical and electrical pin compatibility)
• Mounting Type: Surface Mount (assembly process compatibility)

Substitute parts must maintain identical electrical performance and physical compatibility. Packaging format (Tube versus Tape & Reel) does not affect functional substitution but may impact procurement and handling procedures.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS573CDWR is a direct functional equivalent to the SN74ALS573CDW. Both parts are manufactured by Texas Instruments and maintain identical electrical specifications, timing characteristics, and physical package dimensions. The primary distinction is product status: the SN74ALS573CDW is designated Last Time Buy, while the SN74ALS573CDWR maintains Active status with ongoing production availability.

For new designs or long-term procurement requirements, the SN74ALS573CDWR is the preferred selection due to its active production status and higher inventory availability. Both parts satisfy ROHS3 compliance and REACH requirements, ensuring regulatory alignment for industrial and commercial applications.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS573CDWR replace the SN74ALS573CDW in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all functional parameters. Pin configuration, voltage requirements, timing specifications, and output characteristics are equivalent. Direct substitution is permissible without circuit modification.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging (SN74ALS573CDW) is suitable for manual handling and small-quantity applications. Tape & Reel packaging (SN74ALS573CDWR) is optimized for automated assembly processes and high-volume production. Functional performance is identical; packaging format affects procurement and assembly workflow only.

Q: Why is the SN74ALS573CDW marked as Last Time Buy?

A: Last Time Buy designation indicates that Texas Instruments has discontinued production of this specific part number. The SN74ALS573CDWR remains in active production and serves as the current manufacturing equivalent. Existing inventory of the CDW variant is limited.

Q: Are there any thermal or environmental differences between these parts?

A: No. Both parts operate across the identical temperature range (0°C ~ 70°C) and maintain equivalent moisture sensitivity levels (MSL 1 - Unlimited). Environmental performance and reliability characteristics are identical.

Q: Can these parts be used interchangeably in PCB assembly?

A: Yes. Both parts use the 20-SOIC surface mount package with identical pin assignments and physical dimensions (0.295" × 7.50mm width). PCB layouts, footprints, and assembly processes require no modification for substitution.