74AHCT573D,112 Equivalent & Substitute Parts

Part Overview

The 74AHCT573D,112 is a D-Type Transparent Latch logic IC manufactured by Nexperia USA Inc., featuring an 8:8 channel configuration with tri-state output in a 20-SOIC package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates within the 4.5V to 5.5V supply voltage range and is suitable for applications requiring transparent latch functionality in digital logic circuits.

Substiute Parts

74AHCT573D,112

Nexperia USA Inc.In Stock: 115674AHCT573D,112 Datasheet

Current PartRFQ

74VHCT573AMX

Fairchild SemiconductorIn Stock: 152174VHCT573AMX Datasheet

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MC74VHCT573ADWG

onsemiIn Stock: 1247MC74VHCT573ADWG Datasheet

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MC74VHCT573ADWRG

onsemiIn Stock: 1078MC74VHCT573ADWRG Datasheet

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SN74AHCT573DW

Texas InstrumentsIn Stock: 27250SN74AHCT573DW Datasheet

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SN74AHCT573DWR

Texas InstrumentsIn Stock: 2208SN74AHCT573DWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74AHCT573D,112 is determined by the following critical parameters:

Core Functional Parameters:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Voltage - Supply: 4.5V ~ 5.5V
• Independent Circuits: 1
• Current - Output High, Low: 8mA, 8mA
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

All identified substitute parts maintain these core functional parameters, ensuring electrical and mechanical compatibility. Variations in propagation delay time and operating temperature range do not prevent substitution when the application requirements fall within the substitute part's specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74AHCT573DWR

The SN74AHCT573DWR from Texas Instruments is the preferred substitute for the 74AHCT573D,112. This part maintains active product status, ensuring long-term availability and supply chain stability. It carries ROHS3 compliance and MSL Level 1 (Unlimited) rating, matching the original part's environmental specifications. The propagation delay of 1ns provides superior performance compared to the original 4.6ns specification. Packaging is supplied in Cut Tape (CT) & Digi-Reel format, suitable for both manual and automated assembly processes.

Secondary Recommendation: SN74AHCT573DW

The SN74AHCT573DW from Texas Instruments offers equivalent functionality with Last Time Buy status. This part is suitable for applications where extended procurement windows are available. It shares identical electrical characteristics with the SN74AHCT573DWR, including 1ns propagation delay and MSL Level 1 rating. Tube packaging is specified for this variant.

Alternative Recommendation: MC74VHCT573ADWRG

The MC74VHCT573ADWRG from onsemi provides an active product alternative with ROHS3 compliance. Operating temperature range is limited to -40°C to 85°C compared to the original -40°C to 125°C specification. Propagation delay is 5.1ns. MSL Level 3 (168 Hours) requires controlled storage conditions. This part is supplied in Tape & Reel packaging.

Consideration: 74VHCT573AMX

The 74VHCT573AMX from Fairchild Semiconductor maintains active product status with equivalent electrical specifications. Operating temperature and MSL ratings follow the 74VHCT series standard. Bulk packaging is specified. RoHS and MSL compliance details are not provided in the available data.

Frequently Asked Questions (FAQ)

Q: Can the 74VHCT573AMX be used as a direct replacement for the 74AHCT573D,112?

A: Yes. Both parts share identical logic type, circuit configuration, output type, supply voltage, output current, and package specifications. The 74VHCT573AMX operates within a narrower temperature range (-40°C to 85°C versus -40°C to 125°C) and has a longer propagation delay (5.1ns versus 4.6ns). Substitution is valid when application requirements fall within these specifications.

Q: What is the difference between the SN74AHCT573DW and SN74AHCT573DWR?

A: Both parts are manufactured by Texas Instruments with identical electrical specifications. The primary difference is packaging format: SN74AHCT573DW is supplied in Tube packaging, while SN74AHCT573DWR is supplied in Cut Tape (CT) & Digi-Reel format. Selection depends on assembly process requirements and procurement volume.

Q: Why does the MC74VHCT573ADWRG have an MSL Level 3 rating while the original part has MSL Level 1?

A: MSL ratings reflect moisture sensitivity during storage and handling. MSL Level 3 (168 Hours) requires storage in controlled humidity environments and has a shorter shelf life after opening compared to MSL Level 1 (Unlimited). This affects handling procedures but does not impact electrical performance once soldered.

Q: Is the operating temperature range difference between substitute parts critical?

A: Operating temperature range is application-dependent. The original 74AHCT573D,112 supports -40°C to 125°C. Substitute parts from the 74VHCT series support -40°C to 85°C. Substitution is valid only when the application's maximum operating temperature does not exceed 85°C.

Q: Can propagation delay differences affect circuit timing?

A: Propagation delay variations must be evaluated against circuit timing requirements. The original part specifies 4.6ns, while Texas Instruments parts specify 1ns (faster) and onsemi/Fairchild parts specify 5.1ns (slower). Faster propagation delays do not create compatibility issues. Slower delays require confirmation that circuit timing margins remain adequate.

Q: Are all substitute parts ROHS3 compliant?

A: ROHS3 compliance is confirmed for SN74AHCT573DW, SN74AHCT573DWR, MC74VHCT573ADWG, and MC74VHCT573ADWRG. The 74VHCT573AMX does not specify ROHS status in available data. Compliance verification is required before procurement if ROHS certification is a design requirement.