Renesas 574MILFT Zero Delay Fanout Buffer - Equivalent & Substitute Parts

Part Overview

The Renesas 574MILFT is an 8-SOIC fanout buffer (distribution) integrated circuit designed for clock and timing applications. This device features a zero delay buffer architecture with PLL capability, supporting a 1:4 input-to-output ratio at frequencies up to 160MHz. The part operates across a 3V to 5.5V supply range and is rated for -40°C to 85°C operating temperatures.

The 574MILFT is classified as obsolete. Due to its discontinued status, equivalent substitute parts are necessary for new designs, production continuity, and long-term component availability. Substitutes must maintain functional compatibility through matching package type, electrical characteristics, and performance parameters.

Substiute Parts

574MILFT

Renesas Electronics CorporationIn Stock: 3910574MILFT Datasheet

Current PartRFQ

2305A-1HDCGI8

Renesas Electronics CorporationIn Stock: 11332305A-1HDCGI8 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 574MILFT is determined by the following critical parameters:

Package Compatibility: The substitute must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure PCB footprint compatibility and assembly process alignment.

Functional Architecture: The substitute must be a zero delay buffer or fanout buffer with PLL capability to maintain the core timing distribution function.

Electrical Interface: The substitute must support CMOS or compatible logic levels (LVTTL, LVCMOS, TTL) for both input and output to ensure signal integrity with existing circuitry.

Frequency Performance: The substitute frequency rating must meet or exceed the application requirements. The 574MILFT operates at 160MHz maximum; substitutes operating at lower frequencies remain valid if the application does not require the full 160MHz capability.

Supply Voltage Range: The substitute must operate within or encompass the 3V to 5.5V supply range of the original part.

Operating Temperature: The substitute must support the -40°C to 85°C operating temperature range.

Compliance & Certification: The substitute must maintain ROHS3 compliance and MSL 1 rating for manufacturing and environmental requirements.

The identified substitute, Renesas 2305A-1HDCGI8, meets these criteria through matching package type, surface mount configuration, PLL-enabled architecture, compatible logic levels, and identical compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The 2305A-1HDCGI8 is the qualified substitute for the obsolete 574MILFT based on the following engineering criteria:

Product Status & Availability: The 2305A-1HDCGI8 maintains active product status with confirmed inventory (1097 pcs new original in stock), ensuring long-term component availability and supply chain continuity compared to the obsolete 574MILFT.

Compliance & Certification: Both parts maintain identical ROHS3 compliance and MSL 1 (Unlimited) ratings, satisfying manufacturing, environmental, and regulatory requirements without additional qualification.

Package & Assembly Compatibility: Both devices use the 8-SOIC (0.154", 3.90mm Width) surface mount package, enabling direct PCB footprint compatibility and assembly process alignment without redesign.

Functional Compatibility: The 2305A-1HDCGI8 provides zero delay buffer functionality with PLL capability and bypass option, maintaining the core timing distribution architecture of the original part.

Electrical Interface: The 2305A-1HDCGI8 accepts LVTTL input and provides CMOS, LVCMOS, and TTL output options, offering broader logic level compatibility than the 574MILFT while maintaining signal integrity.

Operating Temperature Range: Both parts support the identical -40°C to 85°C operating temperature range, ensuring thermal performance consistency across the application environment.

Design Considerations: The 2305A-1HDCGI8 operates at a maximum frequency of 133MHz, which is lower than the 574MILFT's 160MHz rating. Applications requiring frequencies above 133MHz must evaluate alternative substitutes or confirm that the 133MHz capability meets actual system requirements. The 2305A-1HDCGI8 provides a 1:5 input-to-output ratio compared to the 574MILFT's 1:4 ratio; circuit design must accommodate the additional output channel or confirm that the extra output is compatible with the application.

The supply voltage range of the 2305A-1HDCGI8 (3V ~ 3.6V) is narrower than the 574MILFT (3V ~ 5.5V). Applications operating above 3.6V require voltage regulation or alternative substitutes to maintain specified performance.

Frequently Asked Questions (FAQ)

Q: Can the 2305A-1HDCGI8 directly replace the 574MILFT without PCB modifications?

A: Yes, for PCB layout and assembly. Both devices use the 8-SOIC (0.154", 3.90mm Width) surface mount package with identical pinout compatibility. However, circuit design must account for differences in frequency rating (133MHz vs. 160MHz), input-to-output ratio (1:5 vs. 1:4), and supply voltage range (3V ~ 3.6V vs. 3V ~ 5.5V).

Q: What is the frequency limitation of the 2305A-1HDCGI8 compared to the 574MILFT?

A: The 2305A-1HDCGI8 operates at a maximum frequency of 133MHz, while the 574MILFT supports 160MHz. If the application requires frequencies above 133MHz, the substitute is not suitable. If the actual system frequency requirement is 133MHz or lower, the substitute is fully compatible.

Q: Does the 2305A-1HDCGI8 support the same supply voltage range as the 574MILFT?

A: No. The 2305A-1HDCGI8 operates at 3V ~ 3.6V, while the 574MILFT supports 3V ~ 5.5V. Applications requiring supply voltages above 3.6V must use voltage regulation or select an alternative substitute. Applications operating within the 3V ~ 3.6V range are fully compatible.

Q: What is the difference in input-to-output ratio between these parts?

A: The 574MILFT provides a 1:4 ratio (one input, four outputs), while the 2305A-1HDCGI8 provides a 1:5 ratio (one input, five outputs). Circuit design must accommodate the additional output channel or confirm that the extra output does not conflict with the application.

Q: Are the logic level inputs and outputs compatible?

A: The 574MILFT uses CMOS input and output. The 2305A-1HDCGI8 accepts LVTTL input and provides CMOS, LVCMOS, and TTL output options. LVTTL input is compatible with CMOS output from upstream devices. The broader output options (CMOS, LVCMOS, TTL) provide greater flexibility for downstream logic integration.

Q: Do both parts meet the same compliance and environmental standards?

A: Yes. Both the 574MILFT and 2305A-1HDCGI8 are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, satisfying identical manufacturing and environmental requirements.

Q: What is the advantage of the PLL bypass option in the 2305A-1HDCGI8?

A: The 2305A-1HDCGI8 includes a PLL bypass option, allowing operation without the phase-locked loop when zero delay buffering is not required. This provides design flexibility for applications with varying timing requirements. The 574MILFT does not specify a bypass option.