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PI49FCT32805HE Equivalent & Substitute Parts
Part Overview
The PI49FCT32805HE is a Clock Fanout Buffer (Distribution) IC manufactured by Diodes Incorporated, designed for 1:5 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. The 49FCT series provides CMOS input and output compatibility with supply voltage range of 2.97V to 3.63V and operating temperature range of -40°C to 85°C.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | PI49FCT32805HE |
| Manufacturer | Diodes Incorporated |
| Category | Clock/Timing |
| Type | Fanout Buffer (Distribution) |
| Ratio - Input:Output | 1:5 |
| Number of Circuits | 2 |
| Input Type | CMOS |
| Output Type | CMOS |
| Frequency - Max | 133 MHz |
| 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 |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the PI49FCT32805HE is determined by the following critical parameters:
- Functional Equivalence: 1:5 fanout buffer configuration with 2 circuits
- Package Compatibility: 20-SSOP surface mount package (physical dimensions must match or be compatible with PCB layout)
- Electrical Compatibility: Input/Output signal types (CMOS/LVTTL), supply voltage range, and frequency capability
- Operating Temperature Range: Extended range (-40°C to 85°C) or commercial range (0°C to 70°C)
- Compliance: RoHS3 compliance and MSL rating
Substitute parts are grouped into two categories:
Category A - Direct Functional Replacements (Active Status) Parts with 1:5 fanout buffer configuration, 20-SSOP package, and active product status. These include 49FCT20805 and 49FCT3805 series variants with extended frequency capability (166 MHz) or standard frequency operation.
Category B - Package Variant Substitutes (Active Status) Parts with identical electrical function but different package form factors (20-QSOP) or packaging options (Tube, Tape & Reel, Cut Tape).
Parameter Comparison
| Part Number | Manufacturer | Type | Ratio | Frequency Max | Supply Voltage | Temp Range | Package | Status |
|---|---|---|---|---|---|---|---|---|
| PI49FCT32805HE | Diodes Inc. | Fanout Buffer | 1:5 | 133 MHz | 2.97V ~ 3.63V | -40°C ~ 85°C | 20-SSOP | Obsolete |
| 49FCT20805PYGI | Renesas | Fanout Buffer | 1:5 | 166 MHz | 2.3V ~ 2.7V | -40°C ~ 85°C | 20-SSOP | Active |
| 49FCT20805PYGI8 | Renesas | Fanout Buffer | 1:5 | 166 MHz | 2.3V ~ 2.7V | -40°C ~ 85°C | 20-SSOP | Active |
| 49FCT3805APYG | Renesas | Fanout Buffer | 1:5 | Not specified | 3V ~ 3.6V | 0°C ~ 70°C | 20-SSOP | Active |
| 49FCT3805APYG8 | Renesas | Fanout Buffer | 1:5 | Not specified | 3V ~ 3.6V | 0°C ~ 70°C | 20-SSOP | Active |
| 49FCT3805APYGI | Renesas | Fanout Buffer | 1:5 | Not specified | 3V ~ 3.6V | -40°C ~ 85°C | 20-SSOP | Active |
| 49FCT3805APYGI8 | Renesas | Fanout Buffer | 1:5 | Not specified | 3V ~ 3.6V | -40°C ~ 85°C | 20-SSOP | Active |
| 49FCT3805AQG | Renesas | Fanout Buffer | 1:5 | Not specified | 3V ~ 3.6V | 0°C ~ 70°C | 20-QSOP | Active |
| 49FCT3805AQG8 | Renesas | Fanout Buffer | 1:5 | Not specified | 3V ~ 3.6V | 0°C ~ 70°C | 20-QSOP | Active |
| 49FCT3805AQGI | Renesas | Fanout Buffer | 1:5 | Not specified | 3V ~ 3.6V | -40°C ~ 85°C | 20-QSOP | Active |
| 49FCT3805AQGI8 | Renesas | Fanout Buffer | 1:5 | Not specified | 3V ~ 3.6V | -40°C ~ 85°C | 20-QSOP | Active |
Engineering Selection Recommendations
Primary Substitutes (Highest Compatibility)
The 49FCT20805PYGI and 49FCT20805PYGI8 (Renesas Electronics Corporation) are the recommended primary substitutes. Both parts maintain the 1:5 fanout buffer configuration, 20-SSOP package form factor, and extended operating temperature range (-40°C to 85°C). These parts are in active production status with RoHS3 compliance and MSL 1 rating. The higher maximum frequency specification (166 MHz versus 133 MHz) provides additional performance margin. Supply voltage range differs (2.3V to 2.7V versus 2.97V to 3.63V), requiring verification of system power supply compatibility.
Secondary Substitutes (Extended Temperature Range)
The 49FCT3805APYGI, 49FCT3805APYGI8, 49FCT3805AQGI, and 49FCT3805AQGI8 variants provide extended operating temperature range (-40°C to 85°C) matching the original part. These parts are in active production with RoHS3 compliance. The 49FCT3805 series operates at 3V to 3.6V supply voltage, which overlaps with the original part's upper voltage range. Package options include both 20-SSOP (0.209", 5.30mm Width) and 20-QSOP (0.154", 3.90mm Width) variants. QSOP variants require PCB layout verification due to different physical dimensions.
Commercial Temperature Range Alternatives
The 49FCT3805APYG, 49FCT3805APYG8, 49FCT3805AQG, and 49FCT3805AQG8 parts operate within commercial temperature range (0°C to 70°C). These are suitable for applications not requiring extended low-temperature operation. All variants maintain active product status, RoHS3 compliance, and MSL 1 rating.
Frequently Asked Questions (FAQ)
Q: Can the 49FCT20805PYGI directly replace the PI49FCT32805HE?
A: The 49FCT20805PYGI maintains functional equivalence as a 1:5 fanout buffer in a 20-SSOP package with extended temperature range and active product status. However, the supply voltage range differs (2.3V to 2.7V versus 2.97V to 3.63V). Verify that your system power supply operates within the 2.3V to 2.7V range before substitution.
Q: What is the difference between 49FCT3805APYGI and 49FCT3805AQGI?
A: Both parts are 1:5 fanout buffers with identical electrical specifications and extended temperature range (-40°C to 85°C). The primary difference is package form factor: APYGI uses 20-SSOP (0.209", 5.30mm Width) while AQGI uses 20-QSOP (0.154", 3.90mm Width). QSOP is a narrower package requiring different PCB footprint and layout considerations.
Q: Are all substitute parts RoHS3 compliant?
A: Yes, all listed substitute parts are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the original PI49FCT32805HE specifications.
Q: What packaging options are available for the 49FCT3805APYGI?
A: The 49FCT3805APYGI is available in Tube packaging. The 49FCT3805APYGI8 variant is supplied in Tape & Reel (TR) format. Both parts are electrically identical with identical operating specifications.
Q: Can I use a commercial temperature range part (0°C to 70°C) instead of extended range (-40°C to 85°C)?
A: Commercial temperature range parts are suitable only for applications operating within 0°C to 70°C. If your application requires operation below 0°C or above 70°C, use extended temperature range variants (APYGI, APYGI8, AQGI, AQGI8) or the 49FCT20805 series.
Q: What is the inventory status of substitute parts?
A: All listed substitute parts show active inventory: 49FCT20805PYGI (1456 pcs), 49FCT20805PYGI8 (1048 pcs), 49FCT3805APYG (1140 pcs), 49FCT3805APYG8 (4527 pcs), 49FCT3805APYGI (4447 pcs), 49FCT3805APYGI8 (1722 pcs), 49FCT3805AQG (2154 pcs), 49FCT3805AQG8 (2400 pcs), 49FCT3805AQGI (1215 pcs), 49FCT3805AQGI8 (4090 pcs).
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