Equivalent & Substitute Parts for Renesas 954206BGLF

Part Overview

The Renesas 954206BGLF is a Timing Control Hub Clock/Frequency Synthesizer IC designed for Intel CPU-M, Intel CPU, and PCI Express (PCIe) applications. This 56-TSSOP surface mount device operates at 400MHz maximum frequency with a 1:19 input-to-output ratio and crystal input configuration. The part is classified as obsolete, making equivalent substitute components necessary for new designs and legacy system maintenance.

Substiute Parts

954206BGLF

Renesas Electronics CorporationIn Stock: 1591954206BGLF Datasheet

Current PartRFQ

RC21008A000GND#BB0

Renesas Electronics CorporationIn Stock: 770RC21008A000GND#BB0 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 954206BGLF requires evaluation based on the following critical parameters:

Functional Requirements:

• Clock/Timing IC category with PLL functionality
• Single circuit configuration
• Crystal input source capability
• Clock output generation

Electrical Compatibility:

• Supply voltage range: 3.135V ~ 3.465V (primary operating range)
• Maximum frequency capability: minimum 400MHz
• Input-to-output ratio accommodation or functional equivalence

Physical Constraints:

• Surface mount technology
• Package footprint compatibility or acceptable redesign tolerance

Compliance & Status:

• RoHS3 compliance required
• Active or current product status preferred for long-term availability

The RC21008A000GND#BB0 qualifies as a substitute based on its support for the 3.135V ~ 3.465V supply voltage range, PLL functionality, crystal input capability, clock output generation, surface mount configuration, and RoHS3 compliance. The higher maximum frequency (650MHz) and expanded input/output options provide functional coverage for the original application requirements.

Parameter Comparison

Engineering Selection Recommendations

The RC21008A000GND#BB0 is the qualified substitute for the obsolete 954206BGLF based on the following engineering criteria:

Product Status & Availability: The RC21008A000GND#BB0 maintains active product status with Renesas Electronics Corporation, ensuring continued availability and support for new designs and production runs. The 954206BGLF obsolescence status necessitates alternative component selection.

Compliance & Certification: Both components maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements. The substitute part supports the same supply voltage range (3.135V ~ 3.465V) required by the original application.

Functional Capability: The RC21008A000GND#BB0 provides PLL-based clock generation with crystal input support, matching the core functionality of the 954206BGLF. The higher maximum frequency rating (650MHz versus 400MHz) ensures adequate performance headroom for the original application requirements.

Physical Integration: Package change from 56-TFSOP to 40-VFQFN requires PCB layout redesign. The reduced pin count and smaller footprint may provide space optimization benefits in updated designs.

Frequently Asked Questions (FAQ)

Q: Can the RC21008A000GND#BB0 directly replace the 954206BGLF without PCB modifications?

A: No. The package change from 56-TFSOP to 40-VFQFN Exposed Pad requires PCB layout redesign. Pin assignments and footprint geometry differ between the two packages. A complete schematic and layout review is necessary.

Q: What are the key electrical compatibility factors for this substitution?

A: The substitute part must support the 3.135V ~ 3.465V supply voltage range and provide clock output generation from a crystal input source. The RC21008A000GND#BB0 meets both requirements. The higher maximum frequency (650MHz) provides additional performance margin.

Q: Does the RC21008A000GND#BB0 support the same input-to-output ratio as the 954206BGLF?

A: The 954206BGLF operates at a fixed 1:19 input-to-output ratio. The RC21008A000GND#BB0 provides a 3:8 ratio with divider/multiplier capability, offering flexible frequency synthesis options for the application.

Q: Are there moisture sensitivity differences between these parts?

A: Yes. The 954206BGLF has MSL 1 (unlimited moisture exposure tolerance), while the RC21008A000GND#BB0 has MSL 3 (168-hour moisture exposure limit). Storage and handling procedures must account for the stricter MSL requirement of the substitute part.

Q: What is the operating temperature range difference?

A: The 954206BGLF operates from 0°C to 70°C, while the RC21008A000GND#BB0 operates from -40°C to 85°C. The substitute part provides extended temperature range capability, suitable for applications requiring wider environmental tolerance.