PI49FCT3807SE Equivalent & Substitute Parts

Part Overview

The PI49FCT3807SE is a Clock Fanout Buffer (Distribution) IC manufactured by Diodes Incorporated, designed for 1:10 clock distribution at 50 MHz in a 20-SOIC package. 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 active, production-grade alternatives with enhanced frequency capability and extended temperature range options.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI49FCT3807SE
Manufacturer	Diodes Incorporated
Product Category	Clock/Timing - Fanout Buffer (Distribution)
Type	Fanout Buffer (Distribution)
Number of Circuits	1
Ratio - Input:Output	1:10
Frequency - Max	50 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	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the PI49FCT3807SE is based on the following critical parameters that must remain constant across equivalent parts:

Package / Case: 20-SOIC (0.295", 7.50mm Width) — ensures mechanical and electrical compatibility with existing PCB layouts
Ratio - Input:Output: 1:10 — maintains functional equivalence for clock distribution architecture
Input Logic: CMOS, TTL compatible — preserves signal compatibility with upstream clock sources
Output Logic: CMOS, TTL — ensures compatibility with downstream logic circuits
Voltage - Supply: 3V ~ 3.6V — maintains power supply compatibility
Mounting Type: Surface Mount — preserves assembly process compatibility

The 74FCT3807 series from Renesas Electronics Corporation meets all these critical parameters. Substitute parts are available in two packaging formats (Tube and Tape & Reel) and two operating temperature ranges (0°C ~ 70°C and -40°C ~ 85°C). All substitute parts are active products with ROHS3 compliance and MSL 1 rating, matching the original part's environmental specifications.

Parameter Comparison

Parameter	PI49FCT3807SE	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
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
Ratio - Input:Output	1:10	1:10	1:10	1:10	1:10	1:10	1:10	1:10	1:10
Frequency - Max	50 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 (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
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging Format	Not specified	Tube	Tape & Reel (TR)	Tube	Tape & Reel (TR)	Tube	Tape & Reel (TR)	Tube	Tape & Reel (TR)

Engineering Selection Recommendations

All nine substitute parts from the 74FCT3807 series are functionally equivalent to the PI49FCT3807SE and are suitable for direct replacement. Selection between substitutes depends on two factors:

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

Packaging Format: Tube packaging is appropriate for manual assembly and lower-volume production. Tape & Reel (TR) packaging (designated with "8" suffix) is optimized for automated pick-and-place assembly and high-volume manufacturing.

All substitute parts maintain ROHS3 compliance and MSL 1 rating. The 100 MHz maximum frequency of the 74FCT3807 series exceeds the original 50 MHz specification, providing additional performance margin for clock distribution applications.

Frequently Asked Questions (FAQ)

Q: Can the 74FCT3807 series directly replace the PI49FCT3807SE without PCB modifications?

A: Yes. All substitute parts share the identical 20-SOIC package footprint and pinout. No PCB layout changes are required for mechanical or electrical compatibility.

Q: What is the difference between parts with and without the "I" suffix?

A: The "I" suffix indicates extended operating temperature range (-40°C ~ 85°C), matching the original PI49FCT3807SE specification. Parts without "I" are rated for 0°C ~ 70°C commercial operation. Select the "I" variant if your application requires the full temperature range.

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

A: Tube packaging is used for manual component handling and lower-volume assembly. Tape & Reel (TR) packaging is designed for automated pick-and-place equipment and high-volume production. Both formats contain identical components; packaging choice depends on assembly process requirements.

Q: Why do the substitute parts have a higher maximum frequency (100 MHz vs. 50 MHz)?

A: The 74FCT3807 series represents an enhanced design iteration with improved performance specifications. The higher frequency rating provides additional operational margin and does not affect compatibility with 50 MHz clock distribution applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All nine substitute parts carry ROHS3 compliance certification and MSL 1 (Unlimited) moisture sensitivity rating, matching the environmental specifications of the original PI49FCT3807SE.

Q: Which substitute part should I select for a new design?

A: For applications requiring extended temperature operation (-40°C ~ 85°C), select 74FCT3807ASOGI8 (Tape & Reel) or 74FCT3807ASOGI (Tube). For commercial-grade applications (0°C ~ 70°C), select 74FCT3807SOG8 (Tape & Reel) or 74FCT3807SOG (Tube). Choose packaging format based on your assembly process.

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