74HC573DB,118 Equivalent & Substitute Parts

Part Overview

The 74HC573DB,118 is a D-Type Transparent Latch logic IC manufactured by Nexperia USA Inc., configured as a single-channel 8:8 circuit with tri-state output in a 20-SSOP surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates across a 2V to 6V supply voltage range with a 14ns propagation delay and supports operating temperatures from -40°C to 125°C.

Substiute Parts

74HC573DB,118

Nexperia USA Inc.In Stock: 84574HC573DB,118 Datasheet

Current PartRFQ

74HC573PW,118

Nexperia USA Inc.In Stock: 99047074HC573PW,118 Datasheet

SimilarRFQ

74HC373DB,118

Nexperia USA Inc.In Stock: 120874HC373DB,118 Datasheet

Parametric EquivalentRFQ

MM74HC573MTC

Fairchild SemiconductorIn Stock: 7307MM74HC573MTC Datasheet

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MM74HC573MTCX

onsemiIn Stock: 4083MM74HC573MTCX Datasheet

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SN74HC573ADBR

Texas InstrumentsIn Stock: 2164SN74HC573ADBR Datasheet

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SN74HC573APWR

Texas InstrumentsIn Stock: 53433SN74HC573APWR Datasheet

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SN74HC573APWT

Texas InstrumentsIn Stock: 3182SN74HC573APWT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74HC573DB,118 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Voltage Supply Range: 2V ~ 6V (minimum requirement)
• Output Current: 7.8mA / 7.8mA
• Independent Circuits: 1
• Mounting Type: Surface Mount
• RoHS3 Compliance

Secondary Compatibility Factors:

• Package Type: 20-SSOP or 20-TSSOP (both acceptable for equivalent functionality)
• Propagation Delay: Tolerance range 12ns to 23ns
• Operating Temperature: Minimum -40°C to 85°C or higher

Substitutes are grouped into two categories: direct package equivalents (20-SSOP) and package variants (20-TSSOP) that maintain electrical compatibility while offering different physical form factors.

Parameter Comparison

Engineering Selection Recommendations

For Direct Package Replacement (20-SSOP): SN74HC573ADBR from Texas Instruments is the primary active substitute. It maintains the 20-SSOP package footprint, ROHS3 compliance, and MSL Level 1 rating. The 23ns propagation delay is within acceptable tolerance for most applications requiring the original 14ns specification. This part carries active product status with established supply availability.

For Package-Variant Substitution (20-TSSOP): 74HC573PW,118 from Nexperia USA Inc. is the preferred option, offering identical electrical specifications to the original part including the 14ns propagation delay, while providing the narrower 20-TSSOP package form factor. This part maintains active status and full temperature range support (-40°C to 125°C).

SN74HC573APWR from Texas Instruments provides an alternative 20-TSSOP option with active product status, though with a 23ns propagation delay. Both TSSOP variants are suitable for space-constrained applications.

For Extended Temperature Range Requirements: The original 74HC573DB,118 supports -40°C to 125°C operation. Substitutes MM74HC573MTC and MM74HC573MTCX operate only to 85°C maximum. If the full temperature range is required, select 74HC573PW,118 or SN74HC573ADBR.

Compliance Considerations: All recommended substitutes maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can I use a 20-TSSOP package part as a direct replacement for the 20-SSOP original? A: Yes, provided all electrical parameters match. The 20-TSSOP package is narrower (0.173" vs 0.209") but maintains the same pin count and pitch. PCB layout modifications are required to accommodate the different package width. Electrical functionality remains identical.

Q: What is the significance of the propagation delay difference between 14ns and 23ns? A: Propagation delay determines the time required for a logic state change at the input to appear at the output. The original 74HC573DB,118 specifies 14ns. Substitutes with 23ns delays are acceptable for most general-purpose latch applications but may require timing verification in high-speed or time-critical circuits. Consult your system timing requirements before selection.

Q: Why is the 74HC573DB,118 marked as obsolete? A: Obsolete status indicates the manufacturer has discontinued production. Active substitutes from other manufacturers (Texas Instruments, onsemi, Fairchild Semiconductor) provide equivalent functionality and are recommended for new designs and ongoing procurement.

Q: Are all listed substitutes ROHS3 compliant? A: All recommended substitutes carry ROHS3 compliance certification. Verify compliance documentation for your specific application requirements.

Q: What is MSL Level 1, and why does it matter? A: Moisture Sensitivity Level (MSL) 1 indicates unlimited shelf life without moisture control requirements. All listed substitutes maintain MSL Level 1 rating, ensuring compatibility with standard storage and handling procedures.

Q: Can I substitute the 74HC373DB,118 for the 74HC573DB,118? A: The 74HC373DB,118 is a different logic function (D-Type Transparent Latch with different internal architecture) despite similar part numbering. While both are 8:8 tri-state latches, they are not direct functional equivalents. Verify circuit-level compatibility before substitution.

Q: Which substitute offers the best availability? A: SN74HC573APWR from Texas Instruments shows the highest inventory (53,400 pcs), followed by 74HC573PW,118 from Nexperia (990,400 pcs). Both maintain active product status with established supply chains.