74F574SC Equivalent & Substitute Parts

Part Overview

The 74F574SC is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit capacity and tri-state, non-inverted output configuration. This component operates at a clock frequency of 100 MHz with a maximum propagation delay of 8.5ns at 5V with 50pF load. The 74F574SC is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

74F574SC

onsemiIn Stock: 85274F574SC Datasheet

Current PartRFQ

SN74F574DW

Texas InstrumentsIn Stock: 1301SN74F574DW Datasheet

DirectRFQ

SN74F574DWR

Texas InstrumentsIn Stock: 4204SN74F574DWR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74F574SC are qualified based on strict electrical and mechanical parameter matching:

Critical Matching Parameters:

• Identical logic function: D-Type flip-flop, 1 element, 8-bit configuration
• Identical output type: Tri-state, non-inverted
• Identical clock frequency: 100 MHz
• Identical propagation delay: 8.5ns @ 5V, 50pF
• Identical trigger type: Positive edge
• Identical output current specifications: 3mA high, 24mA low
• Identical supply voltage range: 4.5V ~ 5.5V
• Identical operating temperature range: 0°C ~ 70°C
• Identical package: 20-SOIC (0.295", 7.50mm Width)
• Identical mounting type: Surface mount

The substitute parts SN74F574DW and SN74F574DWR, both manufactured by Texas Instruments, meet all electrical and mechanical requirements for direct substitution. Differences exist only in product status and packaging format (tube versus tape & reel).

Parameter Comparison

Engineering Selection Recommendations

SN74F574DWR (Texas Instruments, Active Status) is the primary selection for new designs and production. This part maintains active product status with full manufacturer support, ROHS3 compliance, and availability in tape & reel packaging suitable for automated assembly processes.

SN74F574DW (Texas Instruments, Last Time Buy) serves as a secondary option for applications where tube packaging is acceptable. This part remains available but is designated for last-time buy, indicating limited future availability.

Both Texas Instruments substitutes provide identical electrical performance and mechanical compatibility with the obsolete 74F574SC, with the distinction that both are ROHS3 compliant, addressing environmental and regulatory requirements not specified for the original onsemi part.

Frequently Asked Questions (FAQ)

Q: Can SN74F574DW and SN74F574DWR be used interchangeably with 74F574SC?

A: Yes. Both Texas Instruments parts are direct electrical and mechanical equivalents. All critical parameters including logic function, output type, clock frequency, propagation delay, trigger type, output current, supply voltage, operating temperature, and 20-SOIC package are identical. The only differences are product status and packaging format (tube versus tape & reel).

Q: What is the difference between SN74F574DW and SN74F574DWR?

A: Both parts are electrically identical. SN74F574DW is supplied in tube packaging, while SN74F574DWR is supplied in tape & reel format. SN74F574DWR has active product status, whereas SN74F574DW is designated last-time buy. For new production, SN74F574DWR is recommended.

Q: Are there any compliance differences between the substitute parts and the original 74F574SC?

A: The Texas Instruments substitutes (SN74F574DW and SN74F574DWR) are ROHS3 compliant. Both maintain REACH unaffected status and EAR99 export classification identical to the original part. Moisture sensitivity level remains 1 (unlimited) across all three parts.

Q: Is the 20-SOIC package footprint identical across all three parts?

A: Yes. All three parts use the identical 20-SOIC (0.295", 7.50mm Width) package with surface mount configuration. PCB layout and assembly processes require no modification when substituting between these parts.

Q: Why is the 74F574SC marked as obsolete?

A: The 74F574SC is an onsemi product that has reached end-of-life status. Texas Instruments continues to manufacture equivalent 74F logic devices, including the SN74F574DW and SN74F574DWR, which provide identical functionality with ongoing manufacturer support.