PI49FCT32807QEX Equivalent & Substitute Parts

Part Overview

The PI49FCT32807QEX is a Clock Fanout Buffer (Distribution) IC manufactured by Diodes Incorporated, designed for 1:10 clock distribution at 133 MHz. This active product operates with CMOS input and output logic levels, housed in a 20-SSOP surface mount package. The part is ROHS3 compliant with unlimited moisture sensitivity rating.

Substitute parts are necessary when the original PI49FCT32807QEX becomes unavailable, when alternative packaging formats are required, or when system specifications allow for compatible frequency and voltage parameters within the 74FCT3807 series from Renesas Electronics Corporation.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI49FCT32807QEX
Manufacturer	Diodes Incorporated
Category	Clock/Timing
Type	Fanout Buffer (Distribution)
Ratio - Input:Output	1:10
Frequency - Max	133 MHz
Voltage - Supply	2.97V ~ 3.63V
Operating Temperature	-40°C ~ 85°C
Package / Case	20-SSOP (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution within the 74FCT3807 series is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Ratio - Input:Output: 1:10 (all substitutes maintain this specification)
Package / Case: 20-SSOP (0.154", 3.90mm Width) (all substitutes use identical package)
Mounting Type: Surface Mount (all substitutes are surface mount)
Input Logic: LVTTL (compatible with CMOS input requirements)
Output Logic: CMOS, TTL (compatible with CMOS output requirements)

Variable Parameters Affecting Selection:

Frequency - Max: 100 MHz or 166 MHz (all within or above the 133 MHz requirement)
Voltage - Supply: 3V ~ 3.6V (subset of original 2.97V ~ 3.63V range)
Operating Temperature: 0°C ~ 70°C or -40°C ~ 85°C (affects environmental suitability)
Packaging Format: Tube or Tape & Reel (TR) (affects procurement and assembly methods)

All substitute parts are manufactured by Renesas Electronics Corporation, series 74FCT3807, and maintain ROHS3 compliance and unlimited MSL rating.

Parameter Comparison

Part Number	Manufacturer	Frequency - Max	Voltage - Supply	Operating Temperature	Packaging	Inventory (Pcs)
PI49FCT32807QEX	Diodes Incorporated	133 MHz	2.97V ~ 3.63V	-40°C ~ 85°C	Tape & Reel (TR)	5162
74FCT3807QG	Renesas Electronics	100 MHz	3V ~ 3.6V	0°C ~ 70°C	Tube	2360
74FCT3807AQG	Renesas Electronics	100 MHz	3V ~ 3.6V	0°C ~ 70°C	Tube	1700
74FCT3807AQG8	Renesas Electronics	100 MHz	3V ~ 3.6V	0°C ~ 70°C	Tape & Reel (TR)	21374
74FCT3807AQGI	Renesas Electronics	100 MHz	3V ~ 3.6V	-40°C ~ 85°C	Tube	2106
74FCT3807AQGI8	Renesas Electronics	100 MHz	3V ~ 3.6V	-40°C ~ 85°C	Tape & Reel (TR)	3945
74FCT3807EQGI	Renesas Electronics	166 MHz	3V ~ 3.6V	-40°C ~ 85°C	Tube	1620
74FCT3807QGI	Renesas Electronics	100 MHz	3V ~ 3.6V	-40°C ~ 85°C	Tube	1453

Engineering Selection Recommendations

For Tape & Reel (TR) Packaging with Extended Temperature Range (-40°C ~ 85°C): The 74FCT3807AQGI8 is the primary substitute, offering 21,374 units in stock, matching the original packaging format and extended operating temperature specification. This part maintains full compatibility with the PI49FCT32807QEX in automated assembly environments.

For Tape & Reel (TR) Packaging with Standard Temperature Range (0°C ~ 70°C): The 74FCT3807AQG8 provides an alternative with the highest inventory availability (21,374 units) but operates within a narrower temperature range. Selection depends on system environmental requirements.

For Extended Temperature Range with Tube Packaging: The 74FCT3807AQGI and 74FCT3807EQGI both support -40°C ~ 85°C operation. The 74FCT3807EQGI offers 166 MHz maximum frequency, exceeding the original 133 MHz specification, while the 74FCT3807AQGI maintains 100 MHz operation.

For Maximum Frequency Performance: The 74FCT3807EQGI operates at 166 MHz, providing headroom above the original 133 MHz specification, suitable for applications requiring frequency margin.

All substitute parts maintain ROHS3 compliance, unlimited MSL rating, and identical 20-SSOP package dimensions. Voltage supply ranges (3V ~ 3.6V) are compatible with the original specification window.

Frequently Asked Questions (FAQ)

Q: Can 74FCT3807 series parts directly replace the PI49FCT32807QEX?

A: Yes, within the specified parameter constraints. All 74FCT3807 variants maintain the 1:10 fanout ratio, identical 20-SSOP package footprint, and compatible LVTTL input with CMOS/TTL output logic. Substitution is valid when system voltage supply (3V ~ 3.6V) and operating temperature requirements align with the selected variant.

Q: What is the frequency difference between the original part and substitutes?

A: The PI49FCT32807QEX operates at 133 MHz maximum. Substitute parts operate at either 100 MHz or 166 MHz. The 100 MHz variants are suitable for applications operating below 100 MHz. The 166 MHz variant (74FCT3807EQGI) provides frequency margin for the original 133 MHz specification.

Q: Does packaging format affect electrical performance?

A: No. Tube and Tape & Reel (TR) packaging formats contain identical die and electrical specifications. Packaging selection is determined by assembly process requirements: Tape & Reel for automated pick-and-place assembly, Tube for manual or semi-automated handling.

Q: Are there temperature range differences between variants?

A: Yes. Some variants operate 0°C ~ 70°C (commercial grade), while others operate -40°C ~ 85°C (extended/industrial grade). Selection depends on system environmental specifications. Extended temperature variants are suitable for automotive, industrial, and military applications.

Q: Is the voltage supply range compatible?

A: The original part specifies 2.97V ~ 3.63V. All 74FCT3807 substitutes operate within 3V ~ 3.6V, which is a subset of the original range. This is compatible for systems designed to the substitute voltage specification.

Q: What is the significance of the part number suffix (QG, AQG, AQGI, EQGI)?

A: Suffixes indicate manufacturing variants and temperature grades. The "A" prefix denotes automotive-qualified variants. The "E" prefix indicates enhanced frequency performance (166 MHz). The "I" suffix indicates extended temperature range (-40°C ~ 85°C). The "8" suffix indicates Tape & Reel packaging.

Q: Which substitute offers the best inventory availability?

A: The 74FCT3807AQG8 offers the highest inventory with 21,374 units in stock, providing immediate availability for high-volume production requirements.

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