Renesas 574MLF Equivalent & Substitute Parts

Part Overview

The Renesas 574MLF is a Fanout Buffer (Distribution) with Zero Delay Buffer functionality, designed for clock and timing distribution applications. This 8-SOIC surface mount IC operates at frequencies up to 160MHz with a 1:4 input-to-output ratio and supports supply voltages from 3V to 5.5V. The product is classified as Obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations.

Substiute Parts

574MLF

Renesas Electronics CorporationIn Stock: 1385574MLF Datasheet

Current PartRFQ

2305A-1HDCG

Renesas Electronics CorporationIn Stock: 16142305A-1HDCG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 574MLF is determined by the following critical parameters:

Package Compatibility: Both the main part and substitute must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts.

Functional Classification: The substitute must operate as a Zero Delay Buffer or Fanout Buffer with PLL capability to maintain clock distribution functionality.

Electrical Interface: Input and output signal types (CMOS, LVTTL, LVCMOS, TTL) must be compatible with the system's signal integrity requirements.

Frequency Performance: The substitute's maximum frequency rating must meet or exceed the application's clock frequency requirements.

Supply Voltage Range: The substitute's operating voltage must overlap with or encompass the system's power supply specifications.

Regulatory Compliance: Both parts must maintain equivalent RoHS and REACH compliance status for production continuity.

The 2305A-1HDCG qualifies as a substitute based on matching package type, functional category, PLL integration, and regulatory compliance, despite differences in frequency rating, input-output ratio, and supply voltage specifications.

Parameter Comparison

Engineering Selection Recommendations

The 2305A-1HDCG is the manufacturer-recommended substitute for the obsolete 574MLF. Selection of this substitute is supported by the following engineering factors:

Product Status: The 2305A-1HDCG maintains Active product status with ongoing manufacturing support, ensuring long-term availability and supply chain continuity compared to the Obsolete 574MLF.

Regulatory Compliance: Both parts maintain ROHS3 Compliant and REACH Unaffected status, ensuring equivalent environmental and regulatory compliance for production and deployment.

Package Compatibility: Identical 8-SOIC (0.154", 3.90mm Width) packaging enables direct PCB layout reuse without redesign.

Functional Capability: Both parts integrate PLL technology for zero delay buffer operation in clock distribution applications. The 2305A-1HDCG provides PLL bypass functionality, offering additional operational flexibility.

Design Considerations: Applications operating at frequencies below 133MHz can directly substitute the 2305A-1HDCG. Systems requiring the full 160MHz capability of the 574MLF must evaluate alternative solutions. The 2305A-1HDCG's supply voltage range (3V ~ 3.6V) is narrower than the 574MLF (3V ~ 5.5V); verify system power supply specifications before substitution. The 2305A-1HDCG accepts LVTTL input signals rather than CMOS; confirm input driver compatibility or implement appropriate signal conditioning.

Frequently Asked Questions (FAQ)

Q: Can the 2305A-1HDCG directly replace the 574MLF without PCB modifications?

A: The identical 8-SOIC package enables direct physical replacement. However, verify that your application's clock frequency does not exceed 133MHz (the 2305A-1HDCG maximum) and that your input driver supplies LVTTL-compatible signals. If your system requires 160MHz operation or CMOS input levels, alternative solutions must be evaluated.

Q: What is the difference between the 1:4 and 1:5 input-to-output ratios?

A: The 574MLF distributes one input clock signal to four output channels. The 2305A-1HDCG distributes one input signal to five output channels. If your design requires exactly four outputs, verify that the fifth output of the 2305A-1HDCG can be left unconnected or terminated appropriately per the device datasheet.

Q: Why does the 2305A-1HDCG have a narrower supply voltage range?

A: The 2305A-1HDCG operates from 3V to 3.6V, while the 574MLF operates from 3V to 5.5V. This reflects different design specifications for the two devices. Confirm that your system power supply falls within the 3V to 3.6V range before substitution. Systems requiring 5V operation cannot use the 2305A-1HDCG.

Q: What does "PLL with Bypass" mean on the 2305A-1HDCG?

A: The 2305A-1HDCG includes a PLL bypass mode, allowing operation without phase-locked loop functionality when required. This provides operational flexibility not available on the 574MLF. Consult the device datasheet for bypass mode configuration and performance characteristics.

Q: Are there any signal integrity differences between CMOS input (574MLF) and LVTTL input (2305A-1HDCG)?

A: CMOS and LVTTL are different logic families with different input threshold voltages. The 574MLF accepts standard CMOS input levels, while the 2305A-1HDCG accepts LVTTL levels. Verify that your input clock driver produces LVTTL-compatible signals. If your driver produces CMOS levels, signal conditioning or a level translator may be required.

Q: Is the 2305A-1HDCG suitable for new designs?

A: Yes. The 2305A-1HDCG maintains Active product status with ongoing manufacturing support, making it suitable for new designs. The 574MLF is Obsolete and should not be used in new designs.

Q: What compliance certifications apply to both parts?

A: Both the 574MLF and 2305A-1HDCG are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements for electronic components.