Equivalent & Substitute Parts for Renesas 810251AGILF

Part Overview

The Renesas 810251AGILF is a Jitter Attenuator and Voltage Controlled Crystal Oscillator (VCXO) IC designed for clock/timing applications. Operating at a maximum frequency of 25MHz with a supply voltage range of 2.375V to 3.465V, this device integrates a Phase-Locked Loop (PLL) with bypass capability and supports LVCMOS/LVTTL input and output signaling. The 810251AGILF is packaged in a 16-TSSOP surface mount package with RoHS3 compliance and MSL Level 1 moisture sensitivity rating.

The product status is listed as Obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning.

Substiute Parts

810251AGILF

Renesas Electronics CorporationIn Stock: 1204810251AGILF Datasheet

Current PartRFQ

8T49N241NLGI

Renesas Electronics CorporationIn Stock: 9948T49N241NLGI Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 810251AGILF is determined by the following critical parameters:

Functional Compatibility Criteria:

• PLL with Bypass capability required
• Jitter Attenuator functionality
• Supply voltage range overlap: 2.375V ~ 3.465V
• Operating temperature range: -40°C ~ 85°C
• RoHS3 compliance and REACH unaffected status

Electrical Interface Compatibility:

• Input and output signaling support (LVCMOS/LVTTL minimum requirement)
• Single circuit configuration

Physical and Regulatory Alignment:

• Surface mount packaging
• RoHS3 compliance
• ECCN EAR99 classification

The substitute part 8T49N241NLGI meets these criteria while offering extended frequency capability (1GHz maximum) and enhanced signaling options. The higher frequency rating and additional input/output signaling formats provide forward compatibility for applications requiring greater performance headroom.

Parameter Comparison

Engineering Selection Recommendations

The 8T49N241NLGI serves as a functional substitute for the obsolete 810251AGILF based on the following engineering criteria:

Regulatory and Compliance Alignment: Both devices maintain RoHS3 compliance and REACH unaffected status, ensuring regulatory continuity in applications subject to environmental restrictions.

Electrical Parameter Compatibility: Supply voltage ranges are identical (2.375V ~ 3.465V), and operating temperature specifications match (-40°C ~ 85°C). Both devices incorporate PLL with bypass functionality, preserving the core jitter attenuation architecture.

Product Status Consideration: The 810251AGILF is classified as Obsolete, while the 8T49N241NLGI maintains Active product status, ensuring long-term availability and manufacturing support.

Performance Enhancement: The 8T49N241NLGI provides extended frequency capability (1GHz versus 25MHz) and expanded signaling format support (LVDS, LVHSTL, LVPECL, HCSL in addition to LVCMOS/LVTTL). These enhancements enable the substitute part to address both legacy 810251AGILF applications and higher-performance clock/timing requirements.

Package Consideration: The substitute part uses a 40-VFQFN package versus the original 16-TSSOP package. PCB layout modifications are required to accommodate the different pin count and footprint geometry.

Frequently Asked Questions (FAQ)

Q: Can the 8T49N241NLGI directly replace the 810251AGILF without design modifications?

A: The 8T49N241NLGI provides functional substitution for jitter attenuation and PLL bypass operation. However, the package change from 16-TSSOP to 40-VFQFN requires PCB layout redesign. Pin assignments and signal routing must be verified against device datasheets before implementation.

Q: What are the key electrical parameters that determine substitution compatibility?

A: Supply voltage range (2.375V ~ 3.465V), operating temperature (-40°C ~ 85°C), PLL with bypass capability, and jitter attenuation functionality are the primary criteria. Both devices meet these specifications.

Q: Does the higher frequency rating of the 8T49N241NLGI affect compatibility with 25MHz applications?

A: No. The 8T49N241NLGI operates across a frequency range that includes 25MHz. The higher maximum frequency rating (1GHz) does not preclude operation at lower frequencies within the device's specified range.

Q: Are there signaling format differences between the two parts?

A: Yes. The 810251AGILF supports LVCMOS and LVTTL signaling. The 8T49N241NLGI additionally supports LVDS, LVHSTL, LVPECL (input), and HCSL (output). Applications using only LVCMOS/LVTTL signaling remain compatible; applications requiring expanded signaling formats benefit from the substitute part's additional capabilities.

Q: What is the moisture sensitivity level difference?

A: The 810251AGILF has MSL Level 1 (Unlimited), while the 8T49N241NLGI has MSL Level 3 (168 Hours). This affects storage and handling requirements. MSL Level 3 components require controlled humidity storage and have a 168-hour floor life after moisture exposure.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the 810251AGILF and 8T49N241NLGI are RoHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.