PI49FCT32807SE Equivalent & Substitute Parts

Part Overview

The PI49FCT32807SE is a Clock Fanout Buffer (Distribution) IC manufactured by Diodes Incorporated, designed for 1:10 clock distribution at 133 MHz in a 20-SOIC package. This part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production support. The Renesas Electronics 74FCT3807 series provides direct functional alternatives with compatible pinouts and package specifications.

Key Parameters

Parameter	Value
Type	Fanout Buffer (Distribution)
Number of Circuits	1
Ratio - Input:Output	1:10
Differential - Input:Output	No/No
Input Logic	CMOS
Output Logic	CMOS
Frequency - Max	133 MHz
Voltage - Supply	2.97V ~ 3.63V
Operating Temperature	-40°C ~ 85°C
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the PI49FCT32807SE is determined by the following critical parameters:

Fanout Ratio: 1:10 (input to output)
Package Type: 20-SOIC (0.295", 7.50mm Width)
Mounting: Surface Mount
Logic Compatibility: CMOS input and output
Maximum Frequency: Minimum 100 MHz (substitute parts operate at 100 MHz, below the original 133 MHz specification)
Supply Voltage Range: 3V ~ 3.6V (substitute parts) vs. 2.97V ~ 3.63V (original)
Operating Temperature Range: Available in both 0°C ~ 70°C and -40°C ~ 85°C variants

The Renesas 74FCT3807 series maintains identical pinout, package geometry, and functional specifications. All substitute parts are active products with ROHS3 compliance and unlimited moisture sensitivity rating. Substitutes differ in packaging format (Tube vs. Tape & Reel) and operating temperature range, with temperature-extended variants (-40°C ~ 85°C) available for demanding applications.

Parameter Comparison

Parameter	PI49FCT32807SE	74FCT3807ASOG	74FCT3807ASOG8	74FCT3807ASOGI	74FCT3807ASOGI8	74FCT3807SOG	74FCT3807SOG8	74FCT3807SOGI	74FCT3807SOGI8
Manufacturer	Diodes Inc.	Renesas	Renesas	Renesas	Renesas	Renesas	Renesas	Renesas	Renesas
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
Type	Fanout Buffer	Fanout Buffer	Fanout Buffer	Fanout Buffer	Fanout Buffer	Fanout Buffer	Fanout Buffer	Fanout Buffer	Fanout Buffer
Ratio - Input:Output	1:10	1:10	1:10	1:10	1:10	1:10	1:10	1:10	1:10
Input Logic	CMOS	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL
Output Logic	CMOS	CMOS, TTL	CMOS, TTL	CMOS, TTL	CMOS, TTL	CMOS, TTL	CMOS, TTL	CMOS, TTL	CMOS, TTL
Frequency - Max	133 MHz	100 MHz	100 MHz	100 MHz	100 MHz	100 MHz	100 MHz	100 MHz	100 MHz
Voltage - Supply	2.97V ~ 3.63V	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
Packaging Format	Not specified	Tube	Tape & Reel	Tube	Tape & Reel	Tube	Tape & Reel	Tube	Tape & Reel
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)

Engineering Selection Recommendations

All Renesas 74FCT3807 variants are active products with ROHS3 compliance and identical MSL ratings, providing long-term supply assurance compared to the obsolete PI49FCT32807SE.

Temperature Range Selection:

0°C ~ 70°C variants (74FCT3807ASOG, 74FCT3807SOG, 74FCT3807ASOG8, 74FCT3807SOG8): Suitable for standard commercial and industrial applications with standard operating conditions.
-40°C ~ 85°C variants (74FCT3807ASOGI, 74FCT3807SOGI, 74FCT3807ASOGI8, 74FCT3807SOGI8): Required for extended temperature applications, military-grade systems, and automotive environments.

Packaging Format Selection:

Tube packaging: Suitable for lower-volume production, prototyping, and manual assembly operations.
Tape & Reel (TR) packaging: Optimized for high-volume automated assembly and pick-and-place manufacturing.

Frequency Consideration: The substitute parts operate at 100 MHz maximum frequency, compared to the original 133 MHz specification. Applications requiring frequencies above 100 MHz require design review to confirm compatibility with the reduced maximum frequency rating.

Frequently Asked Questions (FAQ)

Q: Can the 74FCT3807 series directly replace the PI49FCT32807SE? A: Yes. All 74FCT3807 variants maintain identical pinout, 20-SOIC package geometry, 1:10 fanout ratio, and surface mount compatibility. The primary design consideration is the reduced maximum frequency (100 MHz vs. 133 MHz).

Q: What is the difference between LVTTL input and CMOS input? A: The substitute parts feature LVTTL (Low Voltage TTL) input logic, which is compatible with CMOS output sources. LVTTL input thresholds are optimized for 3.3V operation and provide reliable signal reception from standard CMOS logic levels.

Q: Should I select the -40°C ~ 85°C or 0°C ~ 70°C variant? A: Select the -40°C ~ 85°C variant if your application operates outside the 0°C ~ 70°C range or requires extended temperature margin. For standard commercial and industrial applications within 0°C ~ 70°C, either variant is acceptable.

Q: What is the difference between Tube and Tape & Reel packaging? A: Tube packaging contains loose components suitable for manual handling and lower-volume assembly. Tape & Reel packaging is formatted for automated pick-and-place equipment and high-volume production. Both formats contain identical components.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All Renesas 74FCT3807 variants listed are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1), matching the compliance profile of the original part.

Q: What is the impact of the 100 MHz maximum frequency specification? A: Applications operating at or below 100 MHz experience no functional impact. Applications requiring operation above 100 MHz require design verification to confirm that the reduced frequency specification does not affect system performance or timing margins.

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