74HC574N,652 Equivalent & Substitute Parts

Part Overview

The 74HC574N,652 is a D-Type flip-flop logic integrated circuit manufactured by NXP USA Inc., designed for 8-bit positive edge-triggered applications. This component features tri-state, non-inverted outputs and operates across a 2V to 6V supply voltage range. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

74HC574N,652

NXP USA Inc.In Stock: 72274HC574N,652 Datasheet

Current PartRFQ

SN74HC574N

Texas InstrumentsIn Stock: 13743SN74HC574N Datasheet

DirectRFQ

74HC574D,653

Nexperia USA Inc.In Stock: 1153074HC574D,653 Datasheet

MFR RecommendedRFQ

CD74HC574E

Harris CorporationIn Stock: 1460CD74HC574E Datasheet

MFR RecommendedRFQ

TC74HC574APF

Toshiba Semiconductor and StorageIn Stock: 2826TC74HC574APF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74HC574N,652 is determined by the following critical parameters:

• Base product number (74HC574 series)
• D-Type flip-flop function with 8-bit configuration
• Tri-state, non-inverted output type
• Positive edge trigger characteristic
• Supply voltage range (2V ~ 6V minimum requirement)
• Output current capability (7.8mA minimum for both high and low states)
• Package compatibility (20-DIP through-hole or equivalent surface-mount alternatives)

Substitute parts are grouped into two categories: direct pin-compatible through-hole replacements and surface-mount alternatives. All listed substitutes maintain the core 74HC574 functional specification while varying in manufacturer, product status, and performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole Applications (Direct Pin Replacement):

SN74HC574N (Texas Instruments) is the primary active substitute for through-hole mounting. This part maintains full functional compatibility with identical output current specifications and supply voltage range. Texas Instruments is an active manufacturer with established supply chain availability. The operating temperature range is limited to -40°C ~ 85°C compared to the original -40°C ~ 125°C specification.

TC74HC574APF (Toshiba Semiconductor and Storage) provides an alternative through-hole option with active product status. This part offers lower quiescent current (4 µA versus 8 µA) and maintains the full -40°C ~ 85°C operating temperature range. Propagation delay is slightly higher at 33ns compared to 26ns of the original part.

CD74HC574E (Harris Corporation) is an obsolete through-hole option with extended operating temperature range (-55°C ~ 125°C). This part is not RoHS compliant and should be selected only when legacy compliance requirements are not applicable.

For Surface-Mount Applications:

74HC574D,653 (Nexperia USA Inc.) is the manufacturer-recommended surface-mount substitute in 20-SOIC packaging. This part maintains identical electrical performance to the original part, including 133 MHz clock frequency and 26ns propagation delay. Full RoHS3 compliance and active product status support modern procurement requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74HC574N directly replace 74HC574N,652 in a through-hole application?

A: Yes. Both parts share identical pin configuration, output current ratings (7.8mA), and supply voltage range (2V ~ 6V). The primary difference is the operating temperature range: SN74HC574N is rated to 85°C while the original is rated to 125°C. Verify your application's maximum operating temperature requirement before selection.

Q: What is the difference between through-hole and surface-mount substitutes?

A: Through-hole substitutes (SN74HC574N, TC74HC574APF, CD74HC574E) use 20-DIP packaging and mount vertically on PCBs. The surface-mount substitute (74HC574D,653) uses 20-SOIC packaging and mounts flat on the board surface. These are not interchangeable without PCB redesign.

Q: Why is 74HC574D,653 recommended as a manufacturer substitute?

A: Nexperia USA Inc. (formerly NXP Semiconductors) manufactures this part with identical electrical specifications to the original 74HC574N,652, including 133 MHz clock frequency and 26ns propagation delay. It maintains full RoHS3 compliance and active product status, ensuring long-term availability.

Q: Are all listed substitutes RoHS compliant?

A: No. CD74HC574E is RoHS non-compliant. All other substitutes (SN74HC574N, 74HC574D,653, TC74HC574APF) are ROHS3 compliant. Verify your application's compliance requirements before part selection.

Q: What is the impact of different propagation delays among substitutes?

A: Propagation delay affects timing performance. The original part and 74HC574D,653 specify 26ns delay. SN74HC574N specifies 46ns, CD74HC574E specifies 28ns, and TC74HC574APF specifies 33ns. Applications with tight timing constraints should select parts with lower propagation delays.

Q: Can TC74HC574APF be used in applications requiring 125°C operation?

A: No. TC74HC574APF is rated only to 85°C maximum operating temperature. For applications requiring 125°C operation, select 74HC574D,653 (surface-mount) or CD74HC574E (through-hole, non-RoHS compliant).