74HCT574D,652 Equivalent & Substitute Parts

Part Overview

The 74HCT574D,652 is a D-Type flip-flop logic integrated circuit manufactured by Nexperia USA Inc., featuring 1 element with 8-bit positive edge triggering in a 20-SOIC surface mount package. This part is classified as Obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The 74HCT574 series operates as a standard logic flip-flop with tri-state, non-inverted output configuration. It is designed for digital signal storage and buffering applications requiring TTL-compatible logic levels and edge-triggered operation.

Substiute Parts

74HCT574D,652

Nexperia USA Inc.In Stock: 116974HCT574D,652 Datasheet

Current PartRFQ

74HCT574D,653

Nexperia USA Inc.In Stock: 960174HCT574D,653 Datasheet

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CD74HCT574QM96EP

Texas InstrumentsIn Stock: 781CD74HCT574QM96EP Datasheet

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CD74HCT574QM96G4Q1

Texas InstrumentsIn Stock: 937CD74HCT574QM96G4Q1 Datasheet

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CD74HCT574M

Harris CorporationIn Stock: 14951CD74HCT574M Datasheet

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CD74HCT574M96

Harris CorporationIn Stock: 10419CD74HCT574M96 Datasheet

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MC74HCT574ADWR2G

onsemiIn Stock: 5305MC74HCT574ADWR2G Datasheet

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MM74HCT574WM

onsemiIn Stock: 2198MM74HCT574WM Datasheet

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MM74HCT574WMX

onsemiIn Stock: 2681MM74HCT574WMX Datasheet

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NLV74HCT574ADWRG

onsemiIn Stock: 2161NLV74HCT574ADWRG Datasheet

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SN74HCT574DW

Texas InstrumentsIn Stock: 2202SN74HCT574DW Datasheet

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SN74HCT574DWR

Texas InstrumentsIn Stock: 2825SN74HCT574DWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74HCT574D,652 is determined by strict equivalence in the following critical parameters:

• Logic Function: D-Type flip-flop, 1 element, 8-bit configuration
• Output Configuration: Tri-state, non-inverted output
• Trigger Mechanism: Positive edge triggering
• Electrical Specifications: Voltage supply 4.5V ~ 5.5V, output current 6mA minimum
• Package Compatibility: 20-SOIC (0.295", 7.50mm Width) surface mount only
• Propagation Delay: Maximum 33ns @ 4.5V, 50pF load or better
• Temperature Range: Minimum -40°C ~ 125°C operating range

Substitute parts are grouped into three categories:

Direct Equivalents (Identical Packaging & Specifications): Parts with matching 20-SOIC packaging, identical electrical performance, and active product status.

Functional Equivalents (Same Logic, Different Packaging Options): Parts with identical logic function and electrical performance but available in alternative packaging formats (Tape & Reel, Bulk, Tube).

Legacy Equivalents (Obsolete Status): Parts with matching specifications but discontinued or obsolete product status, suitable only when new production alternatives are unavailable.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: 74HCT574D,653 (Nexperia USA Inc., Active Status)

This part is the direct successor to the 74HCT574D,652, maintaining identical electrical specifications, clock frequency, propagation delay, and operating temperature range. It is currently in active production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). This is the preferred choice for new designs and direct replacement applications.

Secondary Recommendation: CD74HCT574QM96EP or CD74HCT574QM96G4Q1 (Texas Instruments, Active Status)

Both Texas Instruments variants meet all functional requirements with identical propagation delay (33ns @ 4.5V, 50pF) and operating temperature range (-40°C ~ 125°C). The CD74HCT574QM96G4Q1 includes AEC-Q100 automotive qualification, suitable for automotive-grade applications. Both are ROHS3 compliant and in active production.

Alternative for Extended Temperature Range: MC74HCT574ADWR2G (onsemi, Active Status)

This part extends the operating temperature range to -55°C ~ 125°C, providing enhanced low-temperature performance. It maintains ROHS3 compliance and is currently in active production. Quiescent current is reduced to 4 µA. Propagation delay is 30ns @ 5V, 50pF, meeting the 33ns specification.

Legacy Alternatives (Obsolete Status): CD74HCT574M, CD74HCT574M96, NLV74HCT574ADWRG

These parts are obsolete or discontinued. CD74HCT574M and CD74HCT574M96 (Harris Corporation) are not ROHS3 compliant. NLV74HCT574ADWRG (onsemi) is obsolete. These should be used only when active alternatives are unavailable and existing inventory is confirmed.

Frequently Asked Questions (FAQ)

Q: Can I use 74HCT574D,653 as a direct replacement for 74HCT574D,652?

A: Yes. Both parts are manufactured by Nexperia USA Inc., share identical electrical specifications, clock frequency (76 MHz), propagation delay (33ns @ 4.5V, 50pF), and operating temperature range (-40°C ~ 125°C). The primary difference is product status: 74HCT574D,653 is active production while 74HCT574D,652 is obsolete. The 653 variant is the recommended replacement.

Q: What is the difference between the Nexperia and Texas Instruments versions?

A: Both manufacturers produce functionally equivalent 74HCT574 logic flip-flops in 20-SOIC packaging. The Nexperia 74HCT574D,653 operates at 76 MHz clock frequency, while Texas Instruments CD74HCT574QM96EP operates at 60 MHz. Both meet the 33ns propagation delay specification at 4.5V with 50pF load. Texas Instruments offers the CD74HCT574QM96G4Q1 variant with AEC-Q100 automotive qualification for automotive applications.

Q: Are there any temperature range limitations I should consider?

A: The original 74HCT574D,652 operates from -40°C to 125°C. Most active substitutes maintain this range. However, MM74HCT574WM and MM74HCT574WMX (onsemi) are limited to -40°C ~ 85°C, making them unsuitable if the full -40°C ~ 125°C range is required. MC74HCT574ADWR2G and NLV74HCT574ADWRG extend the range to -55°C ~ 125°C for enhanced low-temperature operation.

Q: What packaging options are available?

A: All substitute parts listed use the 20-SOIC (0.295", 7.50mm Width) surface mount package, matching the original 74HCT574D,652. Packaging format variations (Tape & Reel, Tube, Bulk) do not affect electrical compatibility; they reflect different distribution and handling methods. Select based on procurement and assembly requirements.

Q: Is RoHS compliance important for my application?

A: The 74HCT574D,652 is ROHS3 compliant. Most active substitutes (74HCT574D,653, CD74HCT574QM96EP, CD74HCT574QM96G4Q1, MC74HCT574ADWR2G, MM74HCT574WM, MM74HCT574WMX, NLV74HCT574ADWRG, SN74HCT574DW) are also ROHS3 compliant. Legacy parts from Harris Corporation (CD74HCT574M, CD74HCT574M96) are not ROHS3 compliant. Verify compliance requirements for your application before selection.

Q: What does MSL (Moisture Sensitivity Level) mean for my procurement?

A: The original 74HCT574D,652 has MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling. Most onsemi variants (MC74HCT574ADWR2G, MM74HCT574WM, MM74HCT574WMX, NLV74HCT574ADWRG) have MSL 3 (168 Hours), requiring controlled storage conditions. Nexperia and Texas Instruments variants maintain MSL 1. Select based on your storage and handling capabilities.

Q: Can I use parts with lower clock frequency specifications?

A: Yes, if your application does not require the full 76 MHz clock frequency of the original part. Substitutes with 60 MHz (Texas Instruments), 40 MHz (SN74HCT574DW), 33 MHz (onsemi MM variants), or 30 MHz (onsemi MC and NLV variants) are functionally compatible for lower-speed applications. Verify your circuit's actual clock frequency requirements before selecting a lower-speed alternative.

Q: What is the difference between propagation delay specifications at different voltages?

A: Propagation delay varies with supply voltage and load capacitance. The original 74HCT574D,652 specifies 33ns @ 4.5V with 50pF load. Some substitutes specify delay at 5V instead (e.g., MC74HCT574ADWR2G at 30ns @ 5V, 50pF). Lower voltage operation (4.5V) typically results in longer delays. Verify that your application's voltage and load conditions are compatible with the substitute's specified propagation delay.