49FCT806ASOG8 Equivalent & Substitute Parts

Part Overview

The 49FCT806ASOG8 is a Clock Fanout Buffer (Distribution) IC manufactured by Renesas Electronics Corporation, configured as a 1:5 clock distribution device in a 20-SOIC package. This component features CMOS and LVTTL input/output compatibility with a supply voltage range of 4.75V to 5.25V and operates across 0°C to 70°C.

The 49FCT806ASOG8 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support legacy system maintenance or redesign initiatives.

Substiute Parts

49FCT806ASOG8

Renesas Electronics CorporationIn Stock: 81749FCT806ASOG8 Datasheet

Current PartRFQ

8L30210NLGI8

Renesas Electronics CorporationIn Stock: 9438L30210NLGI8 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 49FCT806ASOG8 is determined by functional equivalence in clock distribution capability. The primary substitute identified is the 8L30210NLGI8, also manufactured by Renesas Electronics Corporation.

The substitution logic is based on the following criteria:

• Both devices function as clock buffer/distribution ICs within the Renesas clock timing product family
• Both support LVTTL output logic, enabling compatibility with legacy LVTTL-based systems
• Both are manufactured by the same supplier, ensuring consistent quality and reliability standards
• The 8L30210NLGI8 represents an active product with extended operating temperature range (-40°C to 85°C) and higher frequency capability (200 MHz maximum)

Key parameters that determine substitution feasibility include output logic compatibility (LVTTL), surface mount packaging, and functional classification as a clock distribution device.

Parameter Comparison

Engineering Selection Recommendations

The 8L30210NLGI8 is identified as the manufacturer-recommended substitute for the obsolete 49FCT806ASOG8. Selection of this substitute is supported by the following factors:

• Both devices are manufactured by Renesas Electronics Corporation, ensuring consistent design philosophy and reliability standards
• The 8L30210NLGI8 maintains LVTTL output compatibility, a critical parameter for legacy system integration
• The substitute device holds active product status, ensuring long-term availability and supply chain stability
• The 8L30210NLGI8 is ROHS3 compliant, meeting current environmental and regulatory requirements
• Both devices maintain REACH Unaffected status, confirming compliance with chemical substance regulations

Design integration requires evaluation of package differences (20-SOIC versus 32-VFQFN), supply voltage ranges (4.75V–5.25V versus 1.4V–3.465V), and input:output ratios (1:5 versus 3:10) within the context of the specific application circuit.

Frequently Asked Questions (FAQ)

Q: Why is the 49FCT806ASOG8 classified as obsolete?

A: The 49FCT806ASOG8 has reached end-of-life status within Renesas Electronics' product portfolio. Obsolete classification indicates that the manufacturer no longer produces this device and recommends migration to active alternatives.

Q: What is the primary difference between the 49FCT806ASOG8 and the 8L30210NLGI8?

A: The primary differences are input:output ratio (1:5 versus 3:10), package type (20-SOIC versus 32-VFQFN), supply voltage range (4.75V–5.25V versus 1.4V–3.465V), and operating temperature range (0°C–70°C versus -40°C–85°C). Both devices support LVTTL output logic and function as clock distribution components.

Q: Can the 8L30210NLGI8 be used as a direct pin-for-pin replacement?

A: No. The 8L30210NLGI8 uses a different package (32-VFQFN versus 20-SOIC) and has different pin assignments. PCB redesign is required for substitution.

Q: What are the supply voltage compatibility considerations?

A: The 49FCT806ASOG8 operates at 4.75V–5.25V (5V nominal systems), while the 8L30210NLGI8 operates at 1.4V–3.465V (3.3V nominal systems). Voltage regulation and power supply design must be evaluated for the target application.

Q: Are there any compliance differences between these devices?

A: The 8L30210NLGI8 is ROHS3 compliant, while the 49FCT806ASOG8 compliance status is not specified. Both devices maintain REACH Unaffected status.

Q: What is the significance of the input:output ratio difference?

A: The 49FCT806ASOG8 distributes one input clock signal to five output channels (1:5), while the 8L30210NLGI8 distributes three input signals to ten output channels (3:10). Application requirements determine which ratio is appropriate.