74FCT807BTSOGI8 Equivalent & Substitute Parts

Part Overview

The 74FCT807BTSOGI8 is a Clock Fanout Buffer (Distribution) IC manufactured by Renesas Electronics Corporation, designed for 1:10 clock distribution applications with a maximum frequency of 100 MHz. This device features TTL input and output compatibility, operates from 4.75V to 5.25V supply voltage, and is housed in a 20-SOIC package. The product is currently classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

74FCT807BTSOGI8

Renesas Electronics CorporationIn Stock: 81274FCT807BTSOGI8 Datasheet

Current PartRFQ

74FCT3807SQGI8

Renesas Electronics CorporationIn Stock: 85174FCT3807SQGI8 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74FCT807BTSOGI8 is determined by the following critical parameters:

• Functional Equivalence: Both the main part and substitute must provide 1:10 clock fanout buffer functionality
• Input/Output Ratio: Maintained at 1:10 configuration
• Logic Compatibility: Input and output logic levels must support TTL or compatible logic families
• Frequency Performance: The substitute must meet or exceed the 100 MHz maximum frequency requirement
• Package Compatibility: Physical package dimensions and pin configuration must accommodate existing PCB layouts or allow for design modification
• Supply Voltage: Operating voltage range must be compatible with system power distribution
• Temperature Range: Operating temperature specifications must satisfy application requirements
• Mounting Type: Surface mount technology maintained for consistency with modern manufacturing processes

The 74FCT3807SQGI8 qualifies as a manufacturer-recommended substitute based on these parameters, offering enhanced performance characteristics while maintaining functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The 74FCT3807SQGI8 is the manufacturer-recommended substitute for the obsolete 74FCT807BTSOGI8. Selection of this substitute is supported by the following factors:

• Product Status: The substitute is classified as Active, ensuring continued availability and manufacturing support from Renesas Electronics Corporation
• Functional Equivalence: Both devices maintain identical 1:10 fanout buffer functionality and circuit count
• Performance Enhancement: The substitute provides doubled maximum frequency capability (200 MHz versus 100 MHz), offering performance margin for existing and future applications
• Compliance: The substitute achieves ROHS3 compliance, meeting current environmental and regulatory requirements
• Temperature Range Extension: The substitute supports an extended operating temperature range (-40°C to 105°C), providing broader application flexibility
• Logic Compatibility: LVTTL input and CMOS/TTL output compatibility ensure integration with standard logic families

Package transition from 20-SOIC to 20-SSOP requires PCB layout modification due to different physical dimensions (0.295" versus 0.154" width). Supply voltage range differs significantly (4.75V-5.25V versus 1.71V-3.45V), necessitating verification of system power distribution compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 74FCT3807SQGI8 directly replace the 74FCT807BTSOGI8 without PCB modification?

A: No. While both devices provide identical 1:10 fanout buffer functionality, the package transition from 20-SOIC to 20-SSOP results in different physical dimensions and pin spacing. PCB layout modification is required for proper component placement and electrical connectivity.

Q: What is the primary reason for substitution?

A: The 74FCT807BTSOGI8 is classified as obsolete. The 74FCT3807SQGI8 is the manufacturer-recommended active substitute, ensuring continued component availability and manufacturing support.

Q: Are there voltage compatibility concerns between these devices?

A: Yes. The main part operates from 4.75V to 5.25V, while the substitute operates from 1.71V to 3.45V. System power distribution must be verified to ensure compatibility with the substitute's lower voltage range.

Q: Does the substitute provide equivalent frequency performance?

A: The substitute exceeds the frequency requirement, supporting 200 MHz maximum frequency compared to the main part's 100 MHz. This provides performance margin for clock distribution applications.

Q: What is the significance of the ROHS3 compliance on the substitute?

A: ROHS3 compliance indicates the substitute meets current environmental and regulatory requirements for electronic component manufacturing and use, supporting compliance with modern procurement and environmental standards.

Q: How do the operating temperature ranges compare?

A: The main part operates from -40°C to 85°C, while the substitute extends this range to -40°C to 105°C, providing broader application flexibility for temperature-sensitive environments.

Q: Are the input and output logic levels identical?

A: The main part specifies TTL input and TTL output. The substitute specifies LVTTL input and CMOS/TTL output, providing enhanced logic family compatibility while maintaining TTL operation capability.