Renesas Electronics 813253BGLF Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 813253BGLF is a FemtoClock® Fanout Distribution IC designed for clock/timing applications. This device functions as a frequency translator and jitter attenuator with integrated voltage controlled crystal oscillator (VCXO) capability, operating at 156.25MHz in a 24-TSSOP surface mount package. The product is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

813253BGLF

Renesas Electronics CorporationIn Stock: 1176813253BGLF Datasheet

Current PartRFQ

813N252BKI-04LF

Renesas Electronics CorporationIn Stock: 1963813N252BKI-04LF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 813253BGLF is determined by the following critical parameters:

Functional Compatibility Parameters:

• Input signal levels (HCSL, LVDS, LVHSTL, LVPECL, SSTL support)
• Output signal levels (LVPECL capability)
• Differential input and output support
• PLL with bypass functionality
• Divider/multiplier capability
• Frequency range support (minimum 156.25MHz operation)

Electrical Compatibility Parameters:

• Supply voltage range overlap (minimum 3.135V ~ 3.465V overlap required)
• Operating temperature range (minimum 0°C ~ 70°C coverage required)

Physical Compatibility Parameters:

• Surface mount technology
• Package footprint compatibility

The Renesas Electronics 813N252BKI-04LF qualifies as a substitute based on support for the required input/output signal levels, PLL functionality, divider/multiplier capability, overlapping supply voltage range, and surface mount configuration. The substitute operates at higher maximum frequency (312.5MHz) and supports extended temperature range, providing enhanced performance margins for the 156.25MHz application requirement.

Parameter Comparison

Engineering Selection Recommendations

The 813N252BKI-04LF is an active product from Renesas Electronics, providing long-term availability and supply chain stability compared to the obsolete 813253BGLF. Both components maintain REACH Unaffected compliance status.

The substitute operates within the required supply voltage range (3.135V ~ 3.465V overlap) and supports all necessary input signal levels (HCSL, LVDS, LVHSTL, LVPECL, SSTL) and LVPECL output capability. The extended operating temperature range (-40°C ~ 85°C) of the substitute exceeds the original specification (0°C ~ 70°C), providing enhanced thermal margin.

Package transition from 24-TSSOP to 32-VFQFN requires PCB layout modification. The substitute's higher maximum frequency (312.5MHz) and PLL functionality support the 156.25MHz application requirement with performance headroom. The removal of multiplier capability in the substitute does not impact applications requiring only divider functionality at the specified frequency.

Frequently Asked Questions (FAQ)

Q: Can the 813N252BKI-04LF directly replace the 813253BGLF without circuit modifications?

A: Direct pin-for-pin replacement is not possible due to package change from 24-TSSOP to 32-VFQFN. PCB layout redesign is required. However, functional substitution is valid based on signal level compatibility, PLL support, and frequency capability.

Q: What are the key electrical differences between these parts?

A: The substitute operates at a higher maximum frequency (312.5MHz vs. 156.25MHz) and supports extended temperature range (-40°C to 85°C vs. 0°C to 70°C). Supply voltage ranges overlap in the 3.135V ~ 3.465V window. The substitute adds LVDS output capability while removing multiplier functionality.

Q: Is the supply voltage range compatible for my 156.25MHz application?

A: Yes. Both parts support the overlapping voltage range of 3.135V ~ 3.465V. Verify your system supply voltage falls within this window before implementation.

Q: What input and output signal levels does the substitute support?

A: The 813N252BKI-04LF accepts HCSL, LVDS, LVHSTL, LVPECL, and SSTL input levels, matching the original part. Output options include both LVDS and LVPECL, providing greater flexibility than the original LVPECL-only output.

Q: Does the substitute support PLL functionality?

A: Yes. The 813N252BKI-04LF includes PLL capability. The original part featured PLL with bypass; the substitute provides PLL without explicit bypass specification.

Q: What packaging considerations apply to this substitution?

A: The original 24-TSSOP (0.173", 4.40mm width) package transitions to 32-VFQFN (5x5mm) with exposed pad. This requires complete PCB footprint redesign and layout rerouting. Verify thermal management requirements for the new package in your application.