Equivalent & Substitute Parts for Renesas 85411AMLF Clock Fanout Buffer

Part Overview

The Renesas 85411AMLF is a clock fanout buffer (distribution) IC with 1:2 ratio capability, designed for differential clock signal distribution at frequencies up to 650 MHz. This device features LVDS output and accepts multiple input signal types including HCSL, LVDS, LVHSTL, LVPECL, and SSTL. The 85411AMLF is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility through equivalent packaging, signal distribution ratio, and differential input/output characteristics while meeting or exceeding frequency specifications.

Key Parameters

Parameter	85411AMLF
Manufacturer	Renesas Electronics Corporation
Category	Clock/Timing
Type	Fanout Buffer (Distribution)
Ratio - Input:Output	1:2
Differential - Input:Output	Yes/Yes
Input Signal Types	HCSL, LVDS, LVHSTL, LVPECL, SSTL
Output Signal Type	LVDS
Frequency - Max	650 MHz
Voltage - Supply	2.97V ~ 3.63V
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 85411AMLF are grouped based on the following critical substitution criteria:

Primary Compatibility Requirements:

Package / Case: 8-SOIC (0.154", 3.90mm Width) — maintains PCB layout compatibility
Ratio - Input:Output: 1:2 — preserves signal distribution architecture
Differential - Input:Output: Yes/Yes — ensures differential signal integrity
Mounting Type: Surface Mount — compatible with existing assembly processes
Frequency - Max: Equal to or greater than 650 MHz — meets or exceeds performance requirements
RoHS Status: ROHS3 Compliant — maintains regulatory compliance

Grouping Logic:

Group 1: Direct Frequency Equivalents (650 MHz - 1.5 GHz) onsemi MC100EL11 series parts operate at 1.5 GHz maximum frequency with ECL/PECL input and output. These parts exceed the 650 MHz requirement of the 85411AMLF while maintaining 1:2 distribution in 8-SOIC packaging. Supply voltage differs (4.2V ~ 5.7V vs. 2.97V ~ 3.63V), requiring circuit redesign for voltage compatibility.

Group 2: Higher Frequency Capability (3 GHz) onsemi MC100EP11 and MC100LVEP11 series parts provide 3 GHz maximum frequency with enhanced performance margins. MC100EP11 operates at 4.2V ~ 5.7V (ECL/PECL), while MC100LVEP11 operates at 2.375V ~ 3.8V (CML/LVDS/PECL input, ECL/PECL output), offering closer voltage alignment to the original part.

Group 3: Lower Frequency Alternative (1.5 GHz) onsemi MC10EL11 series provides 1.5 GHz operation with ECL/PECL signaling at 4.2V ~ 5.7V supply voltage.

Group 4: Non-Equivalent Parts (Functional Mismatch) MC10EL89 and MC10EL89DR2G are classified as drivers (1/0 configuration) rather than fanout buffers (1:2 distribution). These parts do not maintain the required signal distribution ratio and are not suitable substitutes.

Parameter Comparison

Part Number	Manufacturer	Type	Ratio	Diff In/Out	Freq Max	Supply Voltage	Temp Range	Package	Status
85411AMLF	Renesas	Fanout Buffer	1:2	Yes/Yes	650 MHz	2.97V ~ 3.63V	0°C ~ 70°C	8-SOIC	Obsolete
MC100EL11DG	onsemi	Fanout Buffer	1:2	Yes/Yes	1.5 GHz	4.2V ~ 5.7V	-40°C ~ 85°C	8-SOIC	Active
MC100EL11DR2G	onsemi	Fanout Buffer	1:2	Yes/Yes	1.5 GHz	4.2V ~ 5.7V	-40°C ~ 85°C	8-SOIC	Active
MC100EP11DG	onsemi	Fanout Buffer	1:2	Yes/Yes	3 GHz	3V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
MC100EP11DR2G	onsemi	Fanout Buffer	1:2	Yes/Yes	3 GHz	3V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
MC100LVEP11DG	onsemi	Fanout Buffer	1:2	Yes/Yes	3 GHz	2.375V ~ 3.8V	-40°C ~ 85°C	8-SOIC	Active
MC100LVEP11DR2G	onsemi	Fanout Buffer	1:2	Yes/Yes	3 GHz	2.375V ~ 3.8V	-40°C ~ 85°C	8-SOIC	Active
MC10EL11DG	onsemi	Fanout Buffer	1:2	Yes/Yes	1.5 GHz	4.2V ~ 5.7V	-40°C ~ 85°C	8-SOIC	Active
MC10EL11DR2G	onsemi	Fanout Buffer	1:2	Yes/Yes	1.5 GHz	4.2V ~ 5.7V	-40°C ~ 85°C	8-SOIC	Active

Engineering Selection Recommendations

Recommended Primary Substitutes:

MC100LVEP11DG and MC100LVEP11DR2G are the preferred substitutes for the 85411AMLF. These parts maintain the closest voltage compatibility (2.375V ~ 3.8V supply range overlaps with the original 2.97V ~ 3.63V specification), support 3 GHz operation (exceeding the 650 MHz requirement), and are classified as active products with full production support. Both parts are ROHS3 compliant and carry MSL 1 rating. The primary difference is packaging: DG denotes tube packaging while DR2G denotes tape & reel. Selection between these variants depends on procurement and assembly requirements.

Secondary Substitutes:

MC100EP11DG and MC100EP11DR2G provide 3 GHz operation with supply voltage range of 3V ~ 5.5V. While the lower voltage bound (3V) slightly exceeds the original specification floor (2.97V), these parts remain functionally compatible and offer higher frequency margin. Packaging variants follow the same DG (tube) and DR2G (tape & reel) convention.

Alternative Substitutes:

MC100EL11DG, MC100EL11DR2G, MC10EL11DG, and MC10EL11DR2G all provide 1.5 GHz operation with 1:2 distribution in 8-SOIC packaging. These parts require supply voltage of 4.2V ~ 5.7V, necessitating circuit redesign for voltage regulation. Use these alternatives only when higher voltage supply is available in the target application.

Non-Recommended Parts:

MC10EL89DG and MC10EL89DR2G are not suitable substitutes. These parts are classified as drivers with 1/0 configuration rather than fanout buffers with 1:2 distribution, failing to meet the core functional requirement of the 85411AMLF.

Frequently Asked Questions (FAQ)

Q: Can MC100LVEP11DR2G directly replace 85411AMLF without circuit modifications?

A: MC100LVEP11DR2G maintains identical package geometry (8-SOIC), signal distribution ratio (1:2), and differential input/output characteristics. The supply voltage range (2.375V ~ 3.8V) overlaps with the original specification (2.97V ~ 3.63V), allowing operation within the original voltage window. However, input signal type compatibility must be verified: MC100LVEP11DR2G accepts CML, LVDS, and PECL inputs, while 85411AMLF accepts HCSL, LVDS, LVHSTL, LVPECL, and SSTL. Confirm that your input signal type is supported before substitution.

Q: What is the difference between DG and DR2G packaging variants?

A: DG denotes tube packaging, suitable for lower-volume applications and manual assembly. DR2G denotes tape & reel packaging, optimized for high-volume automated assembly. Both variants contain identical die and electrical specifications. Selection depends on procurement volume, assembly process, and inventory management requirements.

Q: Why do MC100EL11 and MC10EL11 parts require higher supply voltage?

A: MC100EL11 and MC10EL11 series use ECL/PECL signaling architecture, which operates at 4.2V ~ 5.7V supply voltage. This differs from the 85411AMLF, which uses LVDS output at 2.97V ~ 3.63V. ECL/PECL signaling provides different noise immunity and speed characteristics compared to LVDS. Substitution with these parts requires redesign of voltage regulation and may affect signal integrity characteristics.

Q: Are MC10EL89 parts suitable substitutes?

A: No. MC10EL89 parts are classified as drivers with 1/0 configuration (one driver, zero receivers), not fanout buffers with 1:2 distribution. These parts cannot replicate the signal distribution function of the 85411AMLF and are not functionally equivalent.

Q: What is the operating temperature difference between 85411AMLF and substitute parts?

A: The 85411AMLF operates from 0°C to 70°C. All recommended substitute parts (MC100 and MC10 series) operate from -40°C to 85°C, providing extended temperature range capability. This represents an improvement over the original specification and does not create compatibility issues for applications within the original 0°C to 70°C window.

Q: Can I use MC100EP11 parts as a direct substitute?

A: MC100EP11DG and MC100EP11DR2G provide 3 GHz operation with supply voltage range 3V ~ 5.5V. The lower voltage bound (3V) slightly exceeds the original specification floor (2.97V), but remains within acceptable tolerance for most applications. These parts are functionally compatible and offer higher frequency margin. Verify that your power supply can maintain 3V minimum under all operating conditions.

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