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PI49FCT3807ASEX Equivalent & Substitute Parts
Part Overview
The PI49FCT3807ASEX is a Clock Fanout Buffer (Distribution) IC manufactured by Diodes Incorporated, designed for 1:10 clock distribution at 66 MHz in a 20-SOIC package. This part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The 74FCT3807 series from Renesas Electronics Corporation provides active, production-supported alternatives with enhanced frequency specifications and extended temperature range options.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | PI49FCT3807ASEX |
| Manufacturer | Diodes Incorporated |
| Category | Clock/Timing |
| Type | Fanout Buffer (Distribution) |
| Number of Circuits | 1 |
| Ratio - Input:Output | 1:10 |
| Input Type | CMOS, TTL |
| Output Type | CMOS, TTL |
| Frequency - Max | 66 MHz |
| 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 PI49FCT3807ASEX is determined by the following critical parameters:
Mandatory Compatibility Parameters:
- Ratio - Input:Output: 1:10 (all substitutes maintain this specification)
- Package / Case: 20-SOIC (0.295", 7.50mm Width) (identical across all alternatives)
- Mounting Type: Surface Mount (consistent)
- Voltage - Supply: 3V ~ 3.6V (all substitutes operate within this range)
- Input/Output Logic Levels: CMOS/TTL compatible (all substitutes support these levels)
Performance Enhancement: The 74FCT3807 series substitutes operate at 100 MHz maximum frequency, exceeding the original 66 MHz specification while maintaining backward compatibility in clock distribution applications.
Temperature Range Variants: Substitute parts are available in two operating temperature ranges:
- 0°C ~ 70°C (commercial grade)
- -40°C ~ 85°C (extended temperature, matching original specification)
Packaging Options: Substitutes are available in Tube and Tape & Reel (TR) configurations to accommodate different procurement and assembly requirements.
Parameter Comparison
| Parameter | PI49FCT3807ASEX | 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 | 66 MHz | 100 MHz | 100 MHz | 100 MHz | 100 MHz | 100 MHz | 100 MHz | 100 MHz | 100 MHz |
| Input Type | CMOS, TTL | LVTTL | LVTTL | LVTTL | LVTTL | LVTTL | LVTTL | LVTTL | LVTTL |
| Output Type | 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 | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
All 74FCT3807 series substitutes from Renesas Electronics Corporation are active production parts with ROHS3 compliance and unlimited moisture sensitivity rating, matching the environmental and regulatory requirements of the obsolete PI49FCT3807ASEX.
For applications requiring extended temperature operation (-40°C ~ 85°C): Select 74FCT3807ASOGI, 74FCT3807ASOGI8, 74FCT3807SOGI, or 74FCT3807SOGI8 variants.
For commercial temperature range applications (0°C ~ 70°C): Select 74FCT3807ASOG, 74FCT3807ASOG8, 74FCT3807SOG, or 74FCT3807SOG8 variants.
For packaging requirements:
- Tube packaging: 74FCT3807ASOG, 74FCT3807ASOGI, 74FCT3807SOG, 74FCT3807SOGI
- Tape & Reel (TR) packaging: 74FCT3807ASOG8, 74FCT3807ASOGI8, 74FCT3807SOG8, 74FCT3807SOGI8
The enhanced 100 MHz frequency specification of all 74FCT3807 substitutes provides performance margin beyond the original 66 MHz design specification.
Frequently Asked Questions (FAQ)
Q: Can 74FCT3807 series parts directly replace PI49FCT3807ASEX in existing designs?
A: Yes. All 74FCT3807 variants maintain identical 1:10 clock distribution functionality, 20-SOIC package footprint, 3V ~ 3.6V supply voltage, and CMOS/TTL input/output compatibility. The 100 MHz maximum frequency exceeds the original 66 MHz specification, ensuring backward compatibility.
Q: What is the difference between commercial (0°C ~ 70°C) and extended temperature (-40°C ~ 85°C) variants?
A: Extended temperature variants (ASOGI, ASOGI8, SOGI, SOGI8) operate across -40°C to 85°C, matching the original PI49FCT3807ASEX temperature range. Commercial variants (ASOG, ASOG8, SOG, SOG8) operate from 0°C to 70°C. Select extended temperature variants for applications requiring full temperature range operation.
Q: What packaging options are available?
A: Tube packaging is suitable for manual assembly and lower-volume applications. Tape & Reel (TR) packaging (designated with "8" suffix) is optimized for automated pick-and-place assembly and higher-volume production.
Q: Are all substitutes RoHS compliant?
A: Yes. All 74FCT3807 series substitutes are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1), matching the environmental compliance of the original part.
Q: What is the difference between ASOG and SOG designations?
A: Both designations indicate 74FCT3807 clock fanout buffer ICs with identical electrical specifications. The designations reflect manufacturer part numbering conventions and do not affect functional or electrical compatibility.
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