PI49FCT3807CS Clock Fanout Buffer Equivalent & Substitute Parts

Part Overview

The PI49FCT3807CS is a Clock Fanout Buffer (Distribution) IC manufactured by Diodes Incorporated, designed for 1:10 clock distribution at frequencies up to 100 MHz. This component operates with supply voltages between 3V and 3.6V and is housed in a 20-SOIC package. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. Substitute parts must maintain functional equivalence across input/output logic levels, frequency specifications, and package compatibility while meeting current RoHS compliance standards.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI49FCT3807CS
Manufacturer	Diodes Incorporated
Category	Clock/Timing
Type	Fanout Buffer (Distribution)
Ratio - Input:Output	1:10
Frequency - Max	100 MHz
Input Logic	CMOS, TTL
Output Logic	CMOS, TTL
Voltage - Supply	3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility for the PI49FCT3807CS is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Ratio - Input:Output: 1:10
Frequency - Max: 100 MHz
Voltage - Supply: 3V ~ 3.6V
Package / Case: 20-SOIC (0.295", 7.50mm Width)
Mounting Type: Surface Mount
Input Logic: CMOS or TTL compatible
Output Logic: CMOS or TTL compatible

Acceptable Variations:

Operating Temperature range may extend beyond the original specification (wider range acceptable)
Input logic type may differ (LVTTL acceptable as subset of TTL compatibility)
Packaging format (Tube vs. Tape & Reel) does not affect electrical equivalence
RoHS compliance status may differ (newer parts typically RoHS3 compliant)

All substitute parts listed below meet these criteria and are manufactured by Renesas Electronics Corporation under the 74FCT3807 base product number series.

Parameter Comparison

Parameter	PI49FCT3807CS	74FCT3807ASOG	74FCT3807ASOG8	74FCT3807ASOGI	74FCT3807ASOGI8	74FCT3807SOG	74FCT3807SOG8	74FCT3807SOGI	74FCT3807SOGI8
Manufacturer	Diodes Inc.	Renesas	Renesas	Renesas	Renesas	Renesas	Renesas	Renesas	Renesas
Ratio - Input:Output	1:10	1:10	1:10	1:10	1:10	1:10	1:10	1:10	1:10
Frequency - Max	100 MHz	100 MHz	100 MHz	100 MHz	100 MHz	100 MHz	100 MHz	100 MHz	100 MHz
Input Logic	CMOS, TTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL
Output Logic	CMOS, TTL	CMOS, TTL	CMOS, TTL	CMOS, TTL	CMOS, TTL	CMOS, TTL	CMOS, TTL	CMOS, TTL	CMOS, TTL
Voltage - Supply	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	20-SOIC	20-SOIC	20-SOIC	20-SOIC	20-SOIC	20-SOIC	20-SOIC	20-SOIC	20-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Not specified	Tube	Tape & Reel	Tube	Tape & Reel	Tube	Tape & Reel	Tube	Tape & Reel

Engineering Selection Recommendations

All listed substitute parts are manufactured by Renesas Electronics Corporation and maintain active product status, ensuring long-term availability and supply chain stability. The 74FCT3807 series substitutes provide ROHS3 compliance, addressing regulatory requirements that the obsolete PI49FCT3807CS does not meet.

Temperature Range Considerations: Parts designated with "I" suffix (74FCT3807ASOGI, 74FCT3807ASOGI8, 74FCT3807SOGI, 74FCT3807SOGI8) support the full -40°C to 85°C operating temperature range, matching the original part specification. Parts without the "I" suffix (74FCT3807ASOG, 74FCT3807ASOG8, 74FCT3807SOG, 74FCT3807SOG8) operate within 0°C to 70°C and are suitable for commercial temperature applications.

Packaging Format Selection: Tube packaging (ASOG, ASOGI, SOG, SOGI variants) is appropriate for manual assembly and lower-volume applications. Tape & Reel packaging (ASOG8, ASOGI8, SOG8, SOGI8 variants) is optimized for automated pick-and-place assembly and high-volume production.

Input Logic Compatibility: All substitute parts feature LVTTL input logic, which is a subset of TTL specifications and maintains full compatibility with CMOS and TTL output sources. This represents an improvement in input threshold consistency compared to the original part.

Frequently Asked Questions (FAQ)

Q: Can I directly replace PI49FCT3807CS with any of the listed 74FCT3807 variants?

A: Yes, all listed 74FCT3807 variants are electrically and mechanically equivalent. Selection depends on operating temperature requirements and packaging format needs. For applications requiring -40°C to 85°C operation, use variants with the "I" suffix. For commercial temperature ranges (0°C to 70°C), standard variants are suitable.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging (no "8" suffix) is used for manual component handling and lower-volume assembly. Tape & Reel packaging ("8" suffix) is wound on continuous tape for automated assembly equipment. Both formats contain identical components; packaging selection is based on assembly process requirements.

Q: Are the LVTTL input specifications of the 74FCT3807 series compatible with my CMOS/TTL source?

A: Yes. LVTTL (Low Voltage TTL) is a subset of TTL logic levels and maintains full compatibility with standard CMOS and TTL output drivers. The 74FCT3807 series will correctly interpret signals from CMOS or TTL sources.

Q: Why is RoHS compliance important for this substitution?

A: The original PI49FCT3807CS is RoHS non-compliant. All 74FCT3807 substitutes are ROHS3 compliant, meeting current environmental and regulatory standards required for new product designs and many manufacturing environments.

Q: Can I use a 0°C to 70°C variant in an application requiring -40°C to 85°C operation?

A: No. Operating temperature range is a critical specification. Use only variants with the "I" suffix (74FCT3807ASOGI, 74FCT3807ASOGI8, 74FCT3807SOGI, 74FCT3807SOGI8) for applications requiring full -40°C to 85°C operation.

Q: Are there any differences in electrical performance between the different 74FCT3807 variants?

A: No. All variants share identical electrical specifications: 1:10 distribution ratio, 100 MHz maximum frequency, 3V to 3.6V supply voltage, and CMOS/TTL output logic. Differences are limited to operating temperature range and packaging format.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message