PI49FCT32807HEX Equivalent & Substitute Parts

Part Overview

The PI49FCT32807HEX is a Clock Fanout Buffer (Distribution) IC manufactured by Diodes Incorporated, designed for 1:10 clock distribution at 133 MHz in a 20-SSOP package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional equivalence in clock distribution capability while meeting the same electrical and mechanical specifications.

Key Parameters

Parameter	Value
Type	Fanout Buffer (Distribution)
Ratio - Input:Output	1:10
Frequency - Max	133 MHz
Input Logic	CMOS
Output Logic	CMOS
Voltage - Supply	2.97V ~ 3.63V
Operating Temperature	-40°C ~ 85°C
Package / Case	20-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the PI49FCT32807HEX is determined by the following critical parameters:

Primary Substitution Criteria:

Fanout Buffer (Distribution) type with 1:10 input-to-output ratio
Maximum frequency capability of 133 MHz or higher
CMOS input and output logic compatibility
Supply voltage range of 2.97V ~ 3.63V or compatible overlap
Operating temperature range including -40°C ~ 85°C
20-SSOP or 20-QSOP package form factors
Surface mount technology
ROHS3 compliance

Substitute Categories:

Category 1: Direct Diodes Incorporated Equivalents (Same Manufacturer) PI49FCT32807QEX maintains identical electrical specifications with 133 MHz maximum frequency and identical supply voltage range. Package variant is 20-QSOP (0.154", 3.90mm Width), which is mechanically compatible for PCB layout redesign. Product status is active.

Category 2: Renesas Electronics 74FCT3807 Series (Frequency-Reduced Substitutes) The 74FCT3807 series from Renesas Electronics operates at 100 MHz maximum frequency, which is lower than the PI49FCT32807HEX specification of 133 MHz. These parts are functionally equivalent for applications not requiring the full 133 MHz bandwidth. Multiple package and temperature variants are available:

74FCT3807APYG / 74FCT3807APYG8 / 74FCT3807APYGI / 74FCT3807APYGI8: 20-SSOP package, 100 MHz
74FCT3807AQG / 74FCT3807AQG8 / 74FCT3807AQGI / 74FCT3807AQGI8: 20-QSOP package, 100 MHz

Category 3: Higher-Frequency Substitute 74FCT3807DPYGI operates at 166 MHz maximum frequency, exceeding the PI49FCT32807HEX specification. This part provides additional frequency margin for demanding applications while maintaining the 1:10 fanout ratio and 20-SSOP package form factor.

Parameter Comparison

Part Number	Manufacturer	Frequency - Max	Input Logic	Output Logic	Voltage - Supply	Operating Temp	Package	Product Status
PI49FCT32807HEX	Diodes Incorporated	133 MHz	CMOS	CMOS	2.97V ~ 3.63V	-40°C ~ 85°C	20-SSOP (5.30mm)	Obsolete
PI49FCT32807QEX	Diodes Incorporated	133 MHz	CMOS	CMOS	2.97V ~ 3.63V	-40°C ~ 85°C	20-QSOP (3.90mm)	Active
74FCT3807APYG	Renesas Electronics	100 MHz	LVTTL	CMOS, TTL	3V ~ 3.6V	0°C ~ 70°C	20-SSOP (5.30mm)	Active
74FCT3807APYG8	Renesas Electronics	100 MHz	LVTTL	CMOS, TTL	3V ~ 3.6V	-40°C ~ 85°C	20-SSOP (5.30mm)	Active
74FCT3807APYGI	Renesas Electronics	100 MHz	LVTTL	CMOS, TTL	3V ~ 3.6V	-40°C ~ 85°C	20-SSOP (5.30mm)	Active
74FCT3807APYGI8	Renesas Electronics	100 MHz	LVTTL	CMOS, TTL	3V ~ 3.6V	-40°C ~ 85°C	20-SSOP (5.30mm)	Active
74FCT3807AQG	Renesas Electronics	100 MHz	LVTTL	CMOS, TTL	3V ~ 3.6V	0°C ~ 70°C	20-QSOP (3.90mm)	Active
74FCT3807AQG8	Renesas Electronics	100 MHz	LVTTL	CMOS, TTL	3V ~ 3.6V	0°C ~ 70°C	20-QSOP (3.90mm)	Active
74FCT3807AQGI	Renesas Electronics	100 MHz	LVTTL	CMOS, TTL	3V ~ 3.6V	-40°C ~ 85°C	20-QSOP (3.90mm)	Active
74FCT3807AQGI8	Renesas Electronics	100 MHz	LVTTL	CMOS, TTL	3V ~ 3.6V	-40°C ~ 85°C	20-QSOP (3.90mm)	Active
74FCT3807DPYGI	Renesas Electronics	166 MHz	LVTTL	CMOS, TTL	3V ~ 3.6V	-40°C ~ 85°C	20-SSOP (5.30mm)	Active

Engineering Selection Recommendations

For Direct Replacement (Active Product, Same Manufacturer): PI49FCT32807QEX is the primary substitute from Diodes Incorporated. It maintains identical electrical specifications (133 MHz, 2.97V ~ 3.63V supply, -40°C ~ 85°C operating range) and ROHS3 compliance. The package change from 20-SSOP (5.30mm) to 20-QSOP (3.90mm) requires PCB layout modification but provides a narrower footprint. This part has active product status and 5162 units in stock.

For Extended Temperature Range with Reduced Frequency: 74FCT3807APYGI8 or 74FCT3807AQGI8 from Renesas Electronics support the full -40°C ~ 85°C operating temperature range while operating at 100 MHz. These parts are suitable for applications where the 133 MHz specification is not required. The 74FCT3807APYGI8 maintains the 20-SSOP (5.30mm) package, while 74FCT3807AQGI8 uses the narrower 20-QSOP (3.90mm) package. Both have active product status with substantial inventory availability.

For Higher Frequency Margin: 74FCT3807DPYGI operates at 166 MHz, providing additional frequency headroom beyond the original 133 MHz specification. This part maintains the 20-SSOP (5.30mm) package and -40°C ~ 85°C operating range. It is suitable for applications requiring enhanced performance margin.

Compliance Considerations: All substitute parts listed maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), matching the original part's environmental certifications.

Frequently Asked Questions (FAQ)

Q: Can PI49FCT32807QEX directly replace PI49FCT32807HEX without design changes? A: PI49FCT32807QEX is electrically equivalent with identical frequency and supply specifications. However, the package changes from 20-SSOP (5.30mm width) to 20-QSOP (3.90mm width), requiring PCB footprint redesign. No schematic changes are necessary.

Q: Why do the Renesas 74FCT3807 parts operate at 100 MHz instead of 133 MHz? A: The 74FCT3807 series is a different product line with lower maximum frequency specification. These parts are functionally equivalent for applications not requiring the full 133 MHz bandwidth. Frequency is a key parameter determining substitution eligibility.

Q: What is the difference between 74FCT3807APYGI and 74FCT3807APYGI8? A: Both parts are identical electrically and functionally. The suffix "8" indicates Tape & Reel (TR) packaging, while the non-suffixed version uses Tube packaging. The "I" suffix indicates extended temperature range (-40°C ~ 85°C). Select based on packaging requirements for your assembly process.

Q: Can I use 74FCT3807APYG instead of 74FCT3807APYGI? A: 74FCT3807APYG has a reduced operating temperature range (0°C ~ 70°C) compared to the original part's -40°C ~ 85°C range. Use only if your application operates within the 0°C ~ 70°C window.

Q: Is 74FCT3807DPYGI a better choice than the other substitutes? A: 74FCT3807DPYGI provides 166 MHz maximum frequency, exceeding the original 133 MHz specification. It is suitable for applications requiring additional frequency margin. However, it operates at 100 MHz base specification like other 74FCT3807 variants. Select based on your specific frequency requirements and performance margin needs.

Q: Are all substitute parts ROHS3 compliant? A: Yes, all substitute parts listed maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), matching the original PI49FCT32807HEX certifications.

Q: What is the difference between 20-SSOP and 20-QSOP packages? A: Both are 20-pin surface mount packages. The 20-SSOP (5.30mm width) is wider, while the 20-QSOP (3.90mm width) is narrower. The narrower QSOP package reduces PCB footprint but requires layout redesign. Pin configurations are compatible between these package types for this product family.

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