NBC12430AFNR2 PLL Clock Generator - Equivalent & Substitute Parts

Part Overview

The NBC12430AFNR2 is a PLL Clock Generator IC manufactured by onsemi, designed for 800MHz maximum frequency operation with PECL output. This component is classified as obsolete, making identification of compatible substitute parts essential for system redesign, legacy product support, and procurement continuity. The part operates across a supply voltage range of 3.135V to 5.25V and is housed in a 28-LCC (J-Lead) surface mount package.

Substiute Parts

NBC12430AFNR2

onsemiIn Stock: 988NBC12430AFNR2 Datasheet

Current PartRFQ

NBC12429AFNR2G

onsemiIn Stock: 1228NBC12429AFNR2G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the NBC12430AFNR2 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Package / Case: 28-LCC (J-Lead)
• Mounting Type: Surface Mount
• Input Type: Crystal
• Output Type: PECL
• Number of Circuits: 1
• Ratio - Input:Output: 1:1
• Voltage - Supply: 3.135V ~ 5.25V (compatible range)
• Operating Temperature: -40°C ~ 85°C (compatible range)

Allowable Variation:

• Frequency - Max: The substitute part may operate at a lower maximum frequency provided the application requirements do not exceed the substitute's frequency specification.

The NBC12429AFNR2G qualifies as a parametric equivalent substitute. While its maximum frequency is rated at 400MHz (compared to 800MHz for the NBC12430AFNR2), all other electrical and mechanical parameters remain compatible. This substitute is suitable for applications where the required clock frequency does not exceed 400MHz.

Parameter Comparison

Engineering Selection Recommendations

NBC12430AFNR2 (Original Part): Use when 800MHz maximum frequency operation is required and RoHS non-compliant components are acceptable for the application. This part carries MSL Level 1 rating, indicating no moisture sensitivity constraints during storage and handling.

NBC12429AFNR2G (Substitute Part): Use when maximum frequency requirements do not exceed 400MHz. This substitute offers ROHS3 compliance, making it suitable for applications with environmental or regulatory compliance requirements. The MSL Level 3 rating requires controlled storage conditions (168-hour maximum exposure to 85% relative humidity at 85°C) prior to soldering.

Selection between these parts depends on frequency requirements and compliance mandates specific to the end application. Both parts maintain identical package geometry, electrical interface characteristics, and operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can NBC12429AFNR2G replace NBC12430AFNR2 in all applications?

A: NBC12429AFNR2G is a valid substitute only when the application's maximum required clock frequency does not exceed 400MHz. If your system requires frequencies above 400MHz, this substitute is not compatible.

Q: What is the primary difference between these two parts?

A: The maximum frequency specification differs: NBC12430AFNR2 operates to 800MHz, while NBC12429AFNR2G operates to 400MHz. All other electrical parameters, package geometry, and interface characteristics are identical.

Q: Are the packages physically identical?

A: Yes. Both parts use the 28-LCC (J-Lead) surface mount package with identical dimensions (11.51x11.51mm). PCB footprints and assembly processes are interchangeable.

Q: What does the MSL rating difference mean for handling?

A: NBC12430AFNR2 has MSL Level 1 (unlimited moisture exposure tolerance). NBC12429AFNR2G has MSL Level 3, requiring that the component be soldered within 168 hours of exposure to 85% relative humidity at 85°C. Proper moisture control during storage and pre-reflow baking may be necessary.

Q: Does RoHS compliance affect electrical performance?

A: No. ROHS3 compliance in NBC12429AFNR2G indicates lead-free construction and absence of restricted substances. Electrical performance and functional characteristics remain equivalent to the non-compliant NBC12430AFNR2.

Q: Can I use NBC12430AFNR2 as a substitute for NBC12429AFNR2G?

A: Yes, NBC12430AFNR2 is backward compatible with NBC12429AFNR2G applications. The higher frequency rating of the NBC12430AFNR2 poses no functional limitation in systems designed for 400MHz operation.