74F574SJ Equivalent & Substitute Parts

Part Overview

The 74F574SJ is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit positive edge triggering and tri-state non-inverted output. This component operates at 100 MHz clock frequency with 8.5ns maximum propagation delay and is housed in a 20-SOIC package (0.209", 5.30mm width).

The 74F574SJ is classified as obsolete. Locating equivalent and substitute parts is necessary to support legacy system maintenance, design continuity, and procurement requirements where original stock availability is limited.

Substiute Parts

74F574SJ

onsemiIn Stock: 161274F574SJ Datasheet

Current PartRFQ

SN74F574NSR

Texas InstrumentsIn Stock: 2575SN74F574NSR Datasheet

DirectRFQ

SN74F574DW

Texas InstrumentsIn Stock: 1301SN74F574DW Datasheet

SimilarRFQ

SN74F574DWR

Texas InstrumentsIn Stock: 4204SN74F574DWR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74F574SJ are identified based on strict electrical and mechanical parameter matching within the 74F logic series. The substitution logic is based on the following criteria:

Core Electrical Parameters (Must Match):

• D-Type flip-flop function with 1 element, 8-bit configuration
• Tri-state, non-inverted output type
• Positive edge trigger
• 100 MHz clock frequency
• 8.5ns maximum propagation delay @ 5V, 50pF
• 3mA / 24mA output current (high / low)
• 4.5V ~ 5.5V supply voltage
• 86 mA quiescent current
• 0°C ~ 70°C operating temperature range
• Surface mount technology

Package Considerations: Substitute parts are grouped into two categories based on physical package dimensions:

1. Direct Package Match (0.209", 5.30mm Width): SN74F574NSR maintains identical package dimensions to the 74F574SJ.

2. Alternative Package Variant (0.295", 7.50mm Width): SN74F574DW and SN74F574DWR feature a wider 20-SOIC package footprint. These parts are electrically equivalent but require PCB layout verification for mechanical fit.

All substitute parts maintain the 74F base product number designation and are manufactured by Texas Instruments, ensuring design compatibility with the original 74F574 logic family specifications.

Parameter Comparison

Engineering Selection Recommendations

SN74F574NSR (Texas Instruments) - Recommended Primary Substitute

The SN74F574NSR is the optimal substitute for the 74F574SJ. This part maintains identical package dimensions (20-SOIC, 0.209", 5.30mm width), ensuring direct PCB compatibility without layout modifications. The SN74F574NSR carries Active product status with ROHS3 compliance, providing long-term availability and regulatory alignment. Packaging is supplied in Tape & Reel format with 2564 units in current inventory.

SN74F574DWR (Texas Instruments) - Secondary Substitute with Package Variant

The SN74F574DWR is electrically equivalent to the 74F574SJ but features a wider 20-SOIC package (0.295", 7.50mm width). This part is Active status with ROHS3 compliance and Tape & Reel packaging. Selection of this part requires PCB footprint verification to confirm mechanical fit within the available board space. Inventory availability is 4140 units.

SN74F574DW (Texas Instruments) - Alternative with Limited Availability

The SN74F574DW provides electrical equivalence with the wider package variant (0.295", 7.50mm width). This part is designated Last Time Buy status, indicating limited future availability. Selection should be considered only when SN74F574NSR or SN74F574DWR are unavailable and PCB layout accommodates the larger package footprint. Current inventory is 1252 units.

All substitute parts are manufactured by Texas Instruments within the 74F logic series and maintain full electrical parameter equivalence to the original 74F574SJ design.

Frequently Asked Questions (FAQ)

Q: Can SN74F574DW or SN74F574DWR be used as direct replacements for 74F574SJ on existing PCBs?

A: Electrical substitution is valid. However, the wider package footprint (0.295", 7.50mm width versus 0.209", 5.30mm width) requires PCB layout verification. Pad spacing and clearance must be confirmed before assembly. If the PCB is designed for the narrower 74F574SJ package, the wider variants may not fit without layout modification.

Q: What is the difference between SN74F574DW and SN74F574DWR?

A: Both parts are electrically identical with the same wider package dimensions (0.295", 7.50mm width). The primary difference is packaging format: SN74F574DW is supplied in Tube packaging, while SN74F574DWR is supplied in Tape & Reel format. Selection depends on assembly process requirements and procurement volume.

Q: Why is the 74F574SJ classified as obsolete?

A: The 74F574SJ is an onsemi product that has reached end-of-life status. Texas Instruments continues to manufacture equivalent parts under the SN74F574 designation, ensuring design continuity and long-term availability within the 74F logic family.

Q: Are all substitute parts RoHS compliant?

A: Yes. All Texas Instruments substitute parts (SN74F574NSR, SN74F574DW, SN74F574DWR) are ROHS3 compliant. The original 74F574SJ RoHS status was not specified in the provided data.

Q: What packaging formats are available for the substitute parts?

A: SN74F574NSR is available in Tape & Reel format. SN74F574DW is available in Tube format. SN74F574DWR is available in Tape & Reel format. Selection should align with manufacturing assembly requirements and procurement processes.

Q: Do all parts share the same electrical specifications?

A: Yes. All substitute parts maintain identical electrical parameters: 100 MHz clock frequency, 8.5ns maximum propagation delay, 4.5V ~ 5.5V supply voltage, 86 mA quiescent current, and 0°C ~ 70°C operating temperature range. Differences exist only in package physical dimensions and product status.