Renesas 83905AMLF Clock Fanout Buffer - Equivalent & Substitute Parts

Part Overview

The Renesas 83905AMLF is a Clock Fanout Buffer (Distribution) IC with 1:6 output configuration operating at 100 MHz maximum frequency. This device is classified as Obsolete, making equivalent and substitute parts necessary for new designs and production continuity. The 83905AMLF provides LVCMOS and LVTTL output options with crystal or LVCMOS/LVTTL input compatibility, housed in a 16-SOIC surface mount package.

Substiute Parts

83905AMLF

Renesas Electronics CorporationIn Stock: 105683905AMLF Datasheet

Current PartRFQ

5PB1106CMGI

Renesas Electronics CorporationIn Stock: 40705PB1106CMGI Datasheet

MFR RecommendedRFQ

NB3H83905CDR2G

onsemiIn Stock: 1595NB3H83905CDR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 83905AMLF is determined by the following critical parameters:

Primary Substitution Criteria:

• Fanout Buffer (Distribution) IC type
• 1:6 input-to-output ratio
• Maximum frequency capability (100 MHz minimum)
• LVCMOS/LVTTL output compatibility
• Surface mount packaging
• Supply voltage range compatibility (1.6V ~ 3.465V overlap)
• RoHS3 compliance

Identified Substitute Parts:

1. 5PB1106CMGI (Renesas Electronics Corporation) - Enhanced performance variant with 200 MHz maximum frequency, 16-UFQFN package, extended operating temperature range (-40°C ~ 85°C), and improved MSL rating (1 - Unlimited). Maintains 1:6 ratio and LVCMOS output compatibility.

2. NB3H83905CDR2G (onsemi) - Direct functional equivalent with identical 100 MHz maximum frequency and 16-SOIC package footprint. Supports crystal, LVCMOS, and LVTTL inputs with LVCMOS and LVTTL outputs. Extended operating temperature range (-40°C ~ 85°C) and improved MSL rating (1 - Unlimited).

Parameter Comparison

Engineering Selection Recommendations

NB3H83905CDR2G is the primary substitute for direct replacement applications. This onsemi part maintains identical electrical specifications (100 MHz maximum frequency, 1:6 ratio, LVCMOS/LVTTL output) and package footprint (16-SOIC) as the 83905AMLF. The part is Active status with improved reliability characteristics (MSL 1 vs. MSL 3) and extended operating temperature range (-40°C ~ 85°C vs. 0°C ~ 70°C). Full input/output compatibility is maintained across crystal, LVCMOS, and LVTTL signal types.

5PB1106CMGI is suitable for applications requiring enhanced performance specifications. This Renesas part doubles the maximum frequency capability to 200 MHz while maintaining the 1:6 fanout ratio and LVCMOS output compatibility. The package changes from 16-SOIC to 16-UFQFN (2.5x2.5mm), requiring PCB layout modification. This substitute is appropriate for designs where higher frequency operation provides system benefits and board space constraints favor the smaller QFN footprint.

Both substitutes are Active products with ROHS3 compliance and REACH Unaffected status, ensuring long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the NB3H83905CDR2G replace the 83905AMLF without PCB modifications?

A: Yes. The NB3H83905CDR2G maintains the identical 16-SOIC (0.154", 3.90mm Width) package footprint, pin configuration, and electrical specifications (100 MHz, 1:6 ratio, LVCMOS/LVTTL output). No PCB layout changes are required for direct substitution.

Q: What are the key differences between the two substitute parts?

A: The NB3H83905CDR2G provides direct package and frequency compatibility with the 83905AMLF. The 5PB1106CMGI offers doubled frequency capability (200 MHz) but requires PCB redesign due to the 16-UFQFN package change. Input signal compatibility differs: NB3H83905CDR2G accepts crystal, LVCMOS, and LVTTL inputs, while 5PB1106CMGI accepts LVCMOS input only.

Q: Are both substitutes suitable for industrial temperature range applications?

A: Both substitutes support extended operating temperature range (-40°C ~ 85°C) compared to the 83905AMLF (0°C ~ 70°C), making them suitable for industrial applications. The 83905AMLF is limited to commercial temperature range.

Q: What is the significance of the MSL rating difference?

A: The 83905AMLF carries MSL 3 (168 Hours), requiring controlled moisture exposure during storage and handling. Both substitutes carry MSL 1 (Unlimited), eliminating moisture sensitivity constraints and reducing handling complexity in manufacturing environments.

Q: Can the 5PB1106CMGI be used in applications designed for 100 MHz operation?

A: Yes. The 5PB1106CMGI operates at frequencies up to 200 MHz, making it fully compatible with 100 MHz applications. The higher frequency capability provides design margin without functional impact on lower-frequency circuits.

Q: What supply voltage considerations apply to these substitutes?

A: The 83905AMLF operates at 1.6V ~ 3.465V. The NB3H83905CDR2G maintains this range. The 5PB1106CMGI operates at 1.71V ~ 3.465V, with a slightly higher minimum voltage. Verify supply voltage compatibility in designs operating below 1.71V.