PI49FCT3807DS Clock Fanout Buffer Equivalent & Substitute Parts

Part Overview

The PI49FCT3807DS is a Clock Fanout Buffer (Distribution) IC manufactured by Diodes Incorporated, designed for 1:10 clock distribution at 156 MHz in 20-SOIC packaging. This part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production support. The 74FCT3807 series from Renesas Electronics Corporation provides direct functional alternatives with active product status and improved compliance certifications.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI49FCT3807DS
Manufacturer	Diodes Incorporated
Category	Clock/Timing
Type	Fanout Buffer (Distribution)
Ratio - Input:Output	1:10
Frequency - Max	156 MHz
Input Type	CMOS, TTL
Output Type	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
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the PI49FCT3807DS is determined by the following critical parameters that must remain consistent:

Mandatory Matching Parameters:

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

Allowable Variations:

Frequency - Max: The PI49FCT3807DS operates at 156 MHz maximum. Substitute parts rated at 100 MHz are functionally compatible in applications where the clock frequency does not exceed 100 MHz.
Operating Temperature: The PI49FCT3807DS supports -40°C ~ 85°C. Substitutes are available in two temperature grades: 0°C ~ 70°C and -40°C ~ 85°C. Selection depends on application requirements.
Product Status: Active substitutes are preferred over obsolete parts for new designs.
RoHS Compliance: Substitute parts are ROHS3 compliant, addressing environmental and regulatory requirements.

The 74FCT3807 series from Renesas Electronics Corporation meets all mandatory parameters and is available in multiple packaging options (Tube and Tape & Reel) and temperature grades.

Parameter Comparison

Parameter	PI49FCT3807DS	74FCT3807ASOG	74FCT3807ASOG8	74FCT3807ASOGI	74FCT3807ASOGI8	74FCT3807SOG	74FCT3807SOG8	74FCT3807SOGI	74FCT3807SOGI8
Manufacturer	Diodes Incorporated	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics
Ratio - Input:Output	1:10	1:10	1:10	1:10	1:10	1:10	1:10	1:10	1:10
Frequency - Max	156 MHz	100 MHz	100 MHz	100 MHz	100 MHz	100 MHz	100 MHz	100 MHz	100 MHz
Input Type	CMOS, TTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL
Output Type	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 (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)
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	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Option	Not specified	Tube	Tape & Reel (TR)	Tube	Tape & Reel (TR)	Tube	Tape & Reel (TR)	Tube	Tape & Reel (TR)
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For New Designs: Select 74FCT3807 variants with -40°C ~ 85°C operating temperature range (74FCT3807ASOGI, 74FCT3807ASOGI8, 74FCT3807SOGI, or 74FCT3807SOGI8) to maintain thermal performance parity with the original PI49FCT3807DS. These parts are active products with ROHS3 compliance, meeting current environmental and regulatory standards.

For Applications Operating Below 100 MHz: All 74FCT3807 variants are suitable substitutes. The 100 MHz maximum frequency specification is sufficient for clock distribution applications not exceeding this threshold.

For Applications Requiring Extended Temperature Range: Parts designated with "I" suffix (74FCT3807ASOGI, 74FCT3807ASOGI8, 74FCT3807SOGI, 74FCT3807SOGI8) support the full -40°C ~ 85°C operating range. Parts without "I" suffix (74FCT3807ASOG, 74FCT3807ASOG8, 74FCT3807SOG, 74FCT3807SOG8) are limited to 0°C ~ 70°C.

For Packaging Preferences: Tube packaging is available in all temperature grades. Tape & Reel (TR) packaging is available in all variants (identified by "8" suffix) for automated assembly processes.

Compliance Consideration: All 74FCT3807 substitutes are ROHS3 compliant, addressing regulatory requirements that the obsolete PI49FCT3807DS does not meet.

Frequently Asked Questions (FAQ)

Q: Can I use a 74FCT3807 substitute rated at 100 MHz in place of the PI49FCT3807DS rated at 156 MHz?

A: Yes, if your application clock frequency does not exceed 100 MHz. The 100 MHz rating is the maximum guaranteed frequency for the 74FCT3807 series. If your design operates at or below 100 MHz, the substitute is functionally compatible. If your design requires operation above 100 MHz, the 74FCT3807 series is not suitable.

Q: What is the difference between 74FCT3807ASOG and 74FCT3807SOG?

A: Both parts are identical in electrical specifications and package. The difference is in the manufacturing code designation. Both are active products from Renesas Electronics Corporation with ROHS3 compliance and 1:10 fanout buffer functionality in 20-SOIC packaging.

Q: Why do some part numbers have an "I" suffix and others do not?

A: The "I" suffix indicates extended operating temperature range (-40°C ~ 85°C). Parts without the "I" suffix operate at 0°C ~ 70°C. Select the temperature grade based on your application's thermal requirements.

Q: What does the "8" suffix mean in part numbers like 74FCT3807ASOG8?

A: The "8" suffix indicates Tape & Reel (TR) packaging, suitable for automated pick-and-place assembly. Parts without the "8" suffix are supplied in Tube packaging for manual assembly or lower-volume applications.

Q: Are all 74FCT3807 variants pin-compatible with the PI49FCT3807DS?

A: Yes. All 74FCT3807 variants use the same 20-SOIC (0.295", 7.50mm Width) package with identical pinout, ensuring direct mechanical and electrical compatibility.

Q: Is the PI49FCT3807DS still available for purchase?

A: The PI49FCT3807DS is classified as obsolete. New designs should transition to active 74FCT3807 variants from Renesas Electronics Corporation. Existing inventory may be available through component distributors, but long-term availability is not guaranteed.

Q: What are the compliance differences between the PI49FCT3807DS and 74FCT3807 substitutes?

A: The PI49FCT3807DS is RoHS non-compliant. All 74FCT3807 substitutes are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic components in most jurisdictions.

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