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PI6C485311WEX Equivalent & Substitute Parts
Part Overview
The PI6C485311WEX is a Clock Fanout Buffer (Distribution) IC manufactured by Diodes Incorporated, designed for 1:2 clock distribution at frequencies up to 800 MHz. This part operates with a 3V to 3.6V supply and features differential LVPECL output, making it suitable for high-speed clock distribution applications in digital systems. The product is currently obsolete, necessitating identification of active equivalent and substitute parts that maintain functional compatibility or provide enhanced performance characteristics within the same package footprint.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | PI6C485311WEX |
| Manufacturer | Diodes Incorporated |
| Type | Fanout Buffer (Distribution) |
| Ratio - Input:Output | 1:2 |
| Differential - Input:Output | Yes/Yes |
| Input Formats | HCSL, LVDS, LVHSTL, LVPECL, SSTL |
| Output Format | LVPECL |
| Frequency - Max | 800 MHz |
| Voltage - Supply | 3V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C |
| Package / Case | 8-SOIC (0.154", 3.90mm 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 PI6C485311WEX is determined by the following critical parameters:
Package Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure PCB layout compatibility without redesign.
Functional Configuration: The 1:2 input-to-output ratio and differential input/output capability are mandatory for clock distribution functionality.
Electrical Compatibility: Substitute parts must support the required input signal formats (HCSL, LVDS, LVHSTL, LVPECL, SSTL) and deliver LVPECL or compatible output formats.
Frequency Performance: Substitute parts are grouped by maximum frequency capability. Parts rated at or above 800 MHz provide direct functional replacement. Parts with lower frequency ratings (700 MHz, 1 GHz) are suitable for applications not requiring the full 800 MHz bandwidth. Parts with higher frequency ratings (1.5 GHz, 2.5 GHz, 3 GHz) provide performance headroom and are backward compatible.
Supply Voltage: The 3V to 3.6V supply range of the original part is the baseline. Substitute parts with overlapping or extended supply ranges are acceptable; parts with non-overlapping ranges require circuit redesign.
Operating Temperature: All substitute parts maintain the -40°C to 85°C operating range, ensuring thermal compatibility.
Product Status and Compliance: Active product status ensures ongoing availability and support. ROHS3 compliance and MSL 1 rating are maintained across all substitutes.
Parameter Comparison
| Part Number | Manufacturer | Frequency (MHz) | Supply Voltage (V) | Input Format | Output Format | Package | Product Status | Packaging Type |
|---|---|---|---|---|---|---|---|---|
| PI6C485311WEX | Diodes Incorporated | 800 | 3.0 ~ 3.6 | HCSL, LVDS, LVHSTL, LVPECL, SSTL | LVPECL | 8-SOIC | Obsolete | - |
| 85211AMI-03LF | Renesas Electronics | 700 | 3.135 ~ 3.465 | HCSL, LVDS, LVHSTL, LVPECL, SSTL | LVHSTL | 8-SOIC | Active | - |
| 853S011BMILF | Renesas Electronics | 2500 | 2.375 ~ 3.8 | CML, LVDS, LVPECL, SSTL | ECL, LVPECL | 8-SOIC | Active | Tube |
| 853S011BMILFT | Renesas Electronics | 2500 | 2.375 ~ 3.8 | CML, LVDS, LVPECL, SSTL | ECL, LVPECL | 8-SOIC | Active | Tape & Reel |
| MC100EL11DG | onsemi | 1500 | 4.2 ~ 5.7 | ECL, PECL | ECL, PECL | 8-SOIC | Active | Tube |
| MC100EL11DR2G | onsemi | 1500 | 4.2 ~ 5.7 | ECL, PECL | ECL, PECL | 8-SOIC | Active | Tape & Reel |
| MC100EP11DG | onsemi | 3000 | 3.0 ~ 5.5 | ECL, PECL | ECL, PECL | 8-SOIC | Active | Tube |
| MC100EP11DR2G | onsemi | 3000 | 3.0 ~ 5.5 | ECL, PECL | ECL, PECL | 8-SOIC | Active | Tape & Reel |
| MC100LVEL11DG | Motorola | 1000 | 3.0 ~ 3.8 | ECL, PECL | ECL, PECL | 8-SOIC | Active | - |
| MC100LVEL11DR2G | onsemi | 1000 | 3.0 ~ 3.8 | ECL, PECL | ECL, PECL | 8-SOIC | Active | Tape & Reel |
| MC100LVEP11DG | onsemi | 3000 | 2.375 ~ 3.8 | CML, LVDS, PECL | ECL, PECL | 8-SOIC | Active | Tube |
Engineering Selection Recommendations
Primary Substitutes (Direct Functional Replacement):
The MC100LVEL11DR2G (onsemi) and MC100LVEL11DG (Motorola) are the closest functional equivalents. Both operate at 1 GHz, support the 3V to 3.8V supply range that overlaps with the original part's 3V to 3.6V specification, and maintain the 8-SOIC package. These parts are active products with ROHS3 compliance and MSL 1 rating. The MC100LVEL11DR2G is available in Tape & Reel packaging with 18,844 units in stock, providing superior supply chain availability.
Extended Performance Substitutes:
The MC100EP11DR2G and MC100EP11DG (onsemi) operate at 3 GHz with supply voltage range 3V to 5.5V, encompassing the original part's operating range. These parts provide significant frequency headroom and are active products with full compliance certifications. The DR2G variant (Tape & Reel) offers 5,219 units in stock.
The 853S011BMILFT (Renesas Electronics) operates at 2.5 GHz with supply voltage 2.375V to 3.8V and is available in Tape & Reel packaging with 2,415 units in stock. This part supports LVPECL output, matching the original part's output format.
Lower Frequency Alternative:
The 85211AMI-03LF (Renesas Electronics) operates at 700 MHz with supply voltage 3.135V to 3.465V, closely matching the original part's supply specification. This part is suitable for applications where 700 MHz performance is sufficient. It is an active product with 722 units in stock.
Supply Voltage Consideration:
The MC100EL11DR2G and MC100EL11DG (onsemi) operate at 1.5 GHz but require 4.2V to 5.7V supply voltage, which does not overlap with the original part's 3V to 3.6V range. These parts require circuit redesign and are not recommended as direct substitutes without power supply modification.
Packaging Availability:
All substitute parts are available in 8-SOIC package. Tape & Reel (TR) variants provide higher inventory levels and are preferred for production environments. Tube packaging variants are suitable for lower-volume applications.
Frequently Asked Questions (FAQ)
Q: Can I use a substitute part with a higher frequency rating than the original PI6C485311WEX?
A: Yes. Parts rated at 1 GHz, 1.5 GHz, 2.5 GHz, or 3 GHz are backward compatible with applications designed for 800 MHz operation. Higher frequency capability does not degrade performance in lower-frequency applications. Verify that the supply voltage range of the substitute overlaps with your circuit's power supply specification.
Q: What is the difference between Tape & Reel and Tube packaging?
A: Tape & Reel (TR) packaging is used for automated assembly and high-volume production, offering better inventory availability and lower per-unit cost. Tube packaging is suitable for lower-volume applications and manual assembly. Both packaging types contain identical die and electrical specifications; the difference is in handling and delivery format only.
Q: Does the 85211AMI-03LF operate at a lower frequency than the original part?
A: Yes, the 85211AMI-03LF is rated at 700 MHz compared to the original part's 800 MHz. This part is suitable for applications where the full 800 MHz bandwidth is not required. If your application requires 800 MHz or higher performance, select a substitute rated at 1 GHz or above.
Q: Are all substitute parts ROHS3 compliant?
A: Yes, all listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental compliance profile.
Q: What is the key difference between MC100LVEL11DR2G and MC100EP11DR2G?
A: The MC100LVEL11DR2G operates at 1 GHz with supply voltage 3V to 3.8V, providing a direct supply voltage match to the original part. The MC100EP11DR2G operates at 3 GHz with supply voltage 3V to 5.5V, offering higher frequency performance but with a wider supply range. Select based on your application's frequency and power supply requirements.
Q: Can I substitute the PI6C485311WEX with MC100EL11DR2G?
A: The MC100EL11DR2G requires 4.2V to 5.7V supply voltage, which does not overlap with the original part's 3V to 3.6V specification. Direct substitution without circuit redesign is not possible. If your application can accommodate a higher supply voltage, this part is a viable option with 1.5 GHz performance and 20,997 units in stock.
Q: Which substitute offers the best supply chain availability?
A: The MC100EL11DR2G (onsemi) offers the highest inventory with 20,997 units in stock, followed by MC100LVEL11DR2G (onsemi) with 18,844 units. Both are available in Tape & Reel packaging suitable for production environments.
Q: Do all substitute parts support the same input signal formats as the original PI6C485311WEX?
A: No. The original part accepts HCSL, LVDS, LVHSTL, LVPECL, and SSTL inputs. Substitute parts have varying input format support. The 85211AMI-03LF and 853S011BMILF/853S011BMILFT support the same input formats. The MC100 series parts (MC100EL11, MC100EP11, MC100LVEL11, MC100LVEP11) support ECL and PECL inputs. Verify that your signal source format is compatible with the selected substitute.
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