PI49FCT3807CHEX Equivalent & Substitute Parts

Part Overview

The PI49FCT3807CHEX is a Clock Fanout Buffer (Distribution) IC manufactured by Diodes Incorporated, designed for 1:10 clock distribution applications with a maximum frequency of 100 MHz. This component operates within the 3V to 3.6V supply voltage range and is housed in a 20-SSOP surface mount package.

The PI49FCT3807CHEX has reached obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this clock distribution architecture.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Part Number	PI49FCT3807CHEX
Category	Clock/Timing
Type	Fanout Buffer (Distribution)
Ratio - Input:Output	1:10
Frequency - Max	100 MHz
Voltage - Supply	3V ~ 3.6V
Input Type	CMOS, TTL
Output Type	CMOS, TTL
Operating Temperature	-40°C ~ 85°C
Package / Case	20-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the PI49FCT3807CHEX is determined by the following critical parameters that must remain constant or compatible:

Ratio - Input:Output: Must be 1:10 (one input, ten outputs)
Package / Case: Must be 20-SSOP (0.209", 5.30mm Width) for PCB layout compatibility
Input/Output Logic Levels: Must support CMOS and TTL logic families
Voltage - Supply: Must operate within 3V ~ 3.6V range
Operating Temperature Range: Must support -40°C ~ 85°C minimum
Mounting Type: Must be Surface Mount

The substitute part PI49FCT3807DHEX meets all these critical parameters. The primary difference is an increased maximum frequency specification (156 MHz versus 100 MHz), which represents an enhancement rather than a limitation. The substitute part maintains identical package geometry, logic compatibility, supply voltage requirements, and temperature operating range.

Parameter Comparison

Parameter	PI49FCT3807CHEX (Main)	PI49FCT3807DHEX (Substitute)
Manufacturer	Diodes Incorporated	Diodes Incorporated
Series	49FCT	49FCT
Type	Fanout Buffer (Distribution)	Fanout Buffer (Distribution)
Number of Circuits	1	1
Ratio - Input:Output	1:10	1:10
Differential - Input:Output	No/No	No/No
Input	CMOS, TTL	CMOS, TTL
Output	CMOS, TTL	CMOS, TTL
Frequency - Max	100 MHz	156 MHz
Voltage - Supply	3V ~ 3.6V	3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	20-SSOP (0.209", 5.30mm Width)	20-SSOP (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Obsolete	Active

Engineering Selection Recommendations

The PI49FCT3807DHEX is the direct substitute for the obsolete PI49FCT3807CHEX. Both components are manufactured by Diodes Incorporated and share identical electrical and mechanical specifications with the exception of maximum frequency rating.

The substitute part offers the following advantages:

Active Product Status: The PI49FCT3807DHEX maintains active production status, ensuring long-term availability and supply chain reliability compared to the obsolete main part.
Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements.
Enhanced Frequency Capability: The 156 MHz maximum frequency of the substitute part exceeds the 100 MHz specification of the main part, providing additional performance headroom for clock distribution applications.
Pin-Compatible Package: Identical 20-SSOP package geometry ensures direct PCB layout compatibility without redesign requirements.

Selection of the PI49FCT3807DHEX is appropriate for all applications previously designed with the PI49FCT3807CHEX, provided that the system clock frequency does not exceed 100 MHz. The substitute part will function correctly in these applications with no modifications to PCB layout, firmware, or system design.

Frequently Asked Questions (FAQ)

Q: Can the PI49FCT3807DHEX directly replace the PI49FCT3807CHEX on existing PCBs?

A: Yes. Both parts use the identical 20-SSOP package with matching pin assignments and electrical characteristics. No PCB modifications are required for substitution.

Q: What is the primary difference between these two parts?

A: The PI49FCT3807DHEX has a maximum frequency specification of 156 MHz, compared to 100 MHz for the PI49FCT3807CHEX. All other electrical and mechanical parameters are identical.

Q: Why is the PI49FCT3807CHEX listed as obsolete?

A: The PI49FCT3807CHEX has reached end-of-life status. The PI49FCT3807DHEX remains in active production and serves as the current equivalent part for this clock distribution function.

Q: Are there any supply voltage or temperature range differences?

A: No. Both parts operate within the same 3V to 3.6V supply voltage range and support the identical -40°C to 85°C operating temperature range.

Q: Do both parts support the same logic input and output levels?

A: Yes. Both the PI49FCT3807CHEX and PI49FCT3807DHEX accept CMOS and TTL logic inputs and provide CMOS and TTL compatible outputs.

Q: What is the 1:10 ratio specification?

A: This indicates one clock input signal is distributed to ten output signals. Both parts provide this identical fanout buffer functionality.

Q: Are there packaging or moisture sensitivity differences?

A: No. Both parts are supplied in 20-SSOP surface mount packages with MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions.

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