Renesas Electronics 570ALF Fanout Distribution Clock Generator - Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 570ALF is a Fanout Distribution, Spread Spectrum Clock Generator with Zero Delay Buffer functionality, designed for clock distribution applications requiring 170MHz maximum frequency operation. This IC operates as a 1:2 input-to-output ratio fanout buffer with integrated PLL and divider/multiplier capabilities in an 8-SOIC surface mount package.

The 570ALF is classified as Obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for legacy systems utilizing this component.

Substiute Parts

570ALF

Renesas Electronics CorporationIn Stock: 948570ALF Datasheet

Current PartRFQ

570BLF

Renesas Electronics CorporationIn Stock: 1085570BLF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 570ALF is determined by strict alignment with the following critical parameters:

• Package Compatibility: Both parts must use 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure PCB layout and assembly compatibility
• Functional Architecture: Fanout Distribution with Spread Spectrum Clock Generator and Zero Delay Buffer capability
• Clock Specifications: Maximum frequency of 170MHz, 1:2 input-to-output ratio, CMOS output configuration
• PLL and Signal Processing: Integrated PLL with divider and multiplier functionality
• Operating Temperature: 0°C ~ 70°C operating range
• Environmental Compliance: REACH Unaffected status and EAR99 ECCN classification

The 570BLF meets all functional and package requirements for substitution. The primary distinction is the supply voltage specification: the 570ALF operates at 4.75V ~ 5.25V (5V logic family), while the 570BLF operates at 3.15V ~ 3.45V (3.3V logic family). This voltage difference requires circuit-level evaluation to confirm compatibility with the target application's power distribution and signal integrity requirements.

Parameter Comparison

Engineering Selection Recommendations

The 570BLF is the manufacturer-recommended substitute for the obsolete 570ALF. Both components share identical functional architecture, frequency specifications, and package form factor within the ClockBlocks™ series.

Product Status Consideration: The 570ALF is classified as Obsolete, while the 570BLF maintains Active product status. This status difference ensures long-term supply chain availability and continued manufacturer support for the 570BLF.

Compliance and Certification: The 570BLF carries ROHS3 Compliant certification, meeting current environmental and regulatory requirements. Both parts maintain REACH Unaffected status and EAR99 ECCN classification, ensuring consistent export and regulatory compliance.

Supply Voltage Difference: The critical distinction between these parts is the supply voltage specification. The 570ALF requires 4.75V ~ 5.25V operation, while the 570BLF requires 3.15V ~ 3.45V operation. This voltage difference necessitates verification that the target application's power supply architecture and signal interface levels are compatible with the 3.3V logic family operation of the 570BLF. Applications currently operating the 570ALF at 5V logic levels must confirm that downstream circuitry can accept 3.3V CMOS output levels or that appropriate level-shifting provisions are implemented.

Frequently Asked Questions (FAQ)

Q: Can the 570BLF directly replace the 570ALF without circuit modifications?

A: The 570BLF is functionally equivalent in terms of clock distribution, fanout capability, and package form factor. However, the supply voltage difference (3.3V versus 5V) requires circuit-level evaluation. If the application's power distribution and signal interface are designed for 3.3V logic operation, direct substitution is feasible. Applications currently operating at 5V logic levels must assess compatibility with 3.3V CMOS output levels.

Q: Are there any package compatibility concerns?

A: Both the 570ALF and 570BLF use identical 8-SOIC (0.154", 3.90mm Width) surface mount packaging. PCB layout, footprint, and assembly processes remain unchanged between these parts.

Q: What is the significance of the Active product status for the 570BLF?

A: Active product status indicates that the 570BLF is currently manufactured, supported, and available through standard distribution channels. This ensures supply chain continuity and access to technical documentation and manufacturer support, which is critical for production environments transitioning from the obsolete 570ALF.

Q: Does the 570BLF meet current environmental regulations?

A: Yes. The 570BLF is ROHS3 Compliant and maintains REACH Unaffected status, meeting current environmental and regulatory requirements for electronic components in most jurisdictions.

Q: Are the frequency and clock distribution specifications identical?

A: Yes. Both parts operate at 170MHz maximum frequency with identical 1:2 input-to-output ratio, CMOS output configuration, integrated PLL, and divider/multiplier functionality. Clock distribution performance and timing characteristics are equivalent.