SN74HCT573NS D-Type Transparent Latch Equivalent & Substitute Parts

Part Overview

The SN74HCT573NS is a D-Type Transparent Latch integrated circuit manufactured by Texas Instruments, designed for 8:8 data latching applications with tri-state, non-inverted output configuration. This component operates within the 74HCT logic series and is housed in a 20-SOIC surface mount package.

The SN74HCT573NS has been discontinued at DiGi Electronics. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this logic function.

Substiute Parts

SN74HCT573NS

Texas InstrumentsIn Stock: 946SN74HCT573NS Datasheet

Current PartRFQ

SN74HCT573NSR

Texas InstrumentsIn Stock: 10285SN74HCT573NSR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74HCT573NS is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Voltage Supply Range: 4.5V ~ 5.5V
• Independent Circuits: 1
• Package / Case: 20-SOIC (0.209", 5.30mm Width)
• Mounting Type: Surface Mount
• Operating Temperature Range: -40°C ~ 85°C
• RoHS Compliance: ROHS3 Compliant

The SN74HCT573NSR qualifies as a direct substitute based on complete alignment with all mandatory parameters. Both parts share identical electrical specifications, mechanical packaging, and environmental compliance certifications. The primary distinction is packaging format (Tape & Reel versus individual units) and product status (Active versus Discontinued).

Parameter Comparison

Engineering Selection Recommendations

SN74HCT573NSR is the direct substitute for SN74HCT573NS based on the following engineering criteria:

Electrical Compatibility: Both parts operate within identical voltage supply ranges (4.5V ~ 5.5V), maintain equivalent output current specifications (6mA high and low), and support the same operating temperature range (-40°C ~ 85°C). The SN74HCT573NSR exhibits improved propagation delay (25ns versus 36ns), which represents enhanced performance without introducing timing conflicts in standard applications.

Mechanical Compatibility: Both components utilize the 20-SOIC package with identical physical dimensions (0.209", 5.30mm Width), ensuring direct PCB footprint compatibility and requiring no layout modifications.

Compliance and Certification: Both parts maintain ROHS3 compliance and identical Moisture Sensitivity Level (MSL 1 - Unlimited), satisfying regulatory and environmental requirements.

Availability and Status: The SN74HCT573NSR is currently in active production status with substantial inventory availability (10,200 pieces), whereas the SN74HCT573NS is discontinued. The SN74HCT573NSR is supplied in Tape & Reel packaging format, suitable for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can SN74HCT573NSR directly replace SN74HCT573NS in existing designs?

A: Yes. Both parts share identical logic function, electrical specifications, and mechanical packaging. No circuit modifications or PCB redesign is required. The SN74HCT573NSR operates within the same voltage and temperature parameters and maintains equivalent output drive capabilities.

Q: What is the difference between SN74HCT573NS and SN74HCT573NSR?

A: The primary differences are packaging format and product status. SN74HCT573NS is supplied as individual units and is discontinued. SN74HCT573NSR is supplied in Tape & Reel format and is in active production. The SN74HCT573NSR also exhibits faster propagation delay (25ns versus 36ns), which is a performance improvement.

Q: Are there any timing considerations when substituting these parts?

A: The SN74HCT573NSR has a faster propagation delay (25ns) compared to the SN74HCT573NS (36ns). This represents improved performance and does not introduce timing violations in applications designed for the original part. Designs will operate within or faster than original specifications.

Q: What packaging format does SN74HCT573NSR use?

A: SN74HCT573NSR is supplied in Tape & Reel (TR) format, which is standard for automated surface mount assembly. This format is compatible with pick-and-place equipment and high-volume manufacturing processes.

Q: Are both parts RoHS compliant?

A: Yes. Both SN74HCT573NS and SN74HCT573NSR are ROHS3 compliant and maintain identical Moisture Sensitivity Level (MSL 1 - Unlimited), meeting environmental and regulatory requirements.

Q: What is the current inventory status?

A: SN74HCT573NS has 872 pieces available but is discontinued. SN74HCT573NSR has 10,200 pieces in active stock and is in current production, providing reliable long-term supply availability.