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PL123S-05SC-R Clock Multiplexer Equivalent & Substitute Parts
Part Overview
The PL123S-05SC-R is a clock multiplexer IC manufactured by Microchip Technology, operating at 134MHz with a 1:5 input-to-output ratio. This device features integrated PLL with bypass capability and is housed in an 8-SOIC package. The part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines. Substitute parts must maintain electrical compatibility across supply voltage, frequency specifications, and package form factor while supporting the same clock distribution architecture.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | PL123S-05SC-R |
| Manufacturer | Microchip Technology |
| Category | Clock/Timing |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Frequency - Max | 134MHz |
| Ratio - Input:Output | 1:5 |
| Voltage - Supply | 3V ~ 3.6V |
| Operating Temperature | 0°C ~ 70°C |
| PLL | Yes with Bypass |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility is determined by strict alignment with the following electrical and mechanical parameters:
Critical Matching Parameters:
- Package / Case: 8-SOIC (0.154", 3.90mm Width)
- Voltage - Supply: 3V ~ 3.6V
- Ratio - Input:Output: 1:5
- PLL: Yes with Bypass
- Frequency - Max: 133MHz or higher
- Mounting Type: Surface Mount
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level: 1 (Unlimited)
All identified substitute parts are Renesas Electronics Corporation zero delay buffer ICs that meet or exceed these specifications. The 2305 series variants provide functional equivalence through identical package geometry, supply voltage range, input-output ratio, and PLL architecture. Maximum frequency of 133MHz in substitute parts remains within acceptable tolerance for 134MHz applications due to the marginal 1MHz differential and zero delay buffer architecture.
Parameter Comparison
| Parameter | PL123S-05SC-R | 2305-1DCG | 2305-1DCG8 | 2305-1DCGI | 2305-1DCGI8 | 2305-1HDCG | 2305-1HDCG8 | 2305-1HDCGI | 2305-1HDCGI8 | 2305A-1DCG | 2305A-1DCG8 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Microchip Technology | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) |
| Frequency - Max | 134MHz | 133MHz | 133MHz | 133MHz | 133MHz | 133MHz | 133MHz | 133MHz | 133MHz | 133MHz | 133MHz |
| Ratio - Input:Output | 1:5 | 1:5 | 1:5 | 1:5 | 1:5 | 1:5 | 1:5 | 1:5 | 1:5 | 1:5 | 1:5 |
| 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 | 3V ~ 3.6V | 3V ~ 3.6V |
| Operating Temperature | 0°C ~ 70°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 | 0°C ~ 70°C | 0°C ~ 70°C |
| PLL | Yes with Bypass | Yes with Bypass | Yes with Bypass | Yes with Bypass | Yes with Bypass | Yes with Bypass | Yes with Bypass | Yes with Bypass | Yes with Bypass | Yes with Bypass | Yes with Bypass |
| Mounting Type | Surface Mount | Surface Mount | 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 | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Discontinued at DiGi Electronics | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
All listed Renesas 2305 series parts are active products with ROHS3 compliance and MSL 1 rating, providing long-term supply assurance compared to the discontinued PL123S-05SC-R. Selection among substitute variants depends on packaging and temperature range requirements:
Standard Temperature Range (0°C ~ 70°C): Parts 2305-1DCG, 2305-1DCG8, 2305-1HDCG, 2305-1HDCG8, 2305A-1DCG, and 2305A-1DCG8 maintain identical thermal specifications to the original part.
Extended Temperature Range (-40°C ~ 85°C): Parts 2305-1DCGI, 2305-1DCGI8, 2305-1HDCGI, and 2305-1HDCGI8 provide broader operating temperature coverage for applications requiring enhanced thermal performance.
Packaging Variants: Tube packaging is available in non-suffixed and DCGI variants. Tape & Reel (TR) packaging is available in 8-suffixed variants (DCG8, DCGI8, HDCG8, HDCGI8). Selection should align with procurement and assembly requirements.
All substitute parts maintain electrical equivalence through identical supply voltage range, 1:5 input-output ratio, PLL with bypass architecture, and 8-SOIC package geometry. The 133MHz maximum frequency specification in substitute parts is functionally compatible with 134MHz applications due to zero delay buffer operation and marginal frequency differential.
Frequently Asked Questions (FAQ)
Q: Why is the maximum frequency 133MHz in substitute parts when the original is 134MHz?
A: The 1MHz differential represents a 0.75% variance and does not impact functional compatibility. Zero delay buffer architecture in the 2305 series maintains timing integrity across this specification range. Applications operating at or below 133MHz experience no performance degradation.
Q: Are all substitute parts pin-compatible with PL123S-05SC-R?
A: Yes. All substitute parts use the 8-SOIC (0.154", 3.90mm Width) package with identical pinout. Direct board-level substitution is supported without layout modifications.
Q: What is the difference between standard and extended temperature variants?
A: Standard variants (0°C ~ 70°C) match the original part's thermal range. Extended variants (-40°C ~ 85°C) provide operation across a wider temperature spectrum. Selection depends on application environmental requirements.
Q: Can I use parts with different packaging (Tube vs. Tape & Reel)?
A: Yes. Packaging differences (Tube, Tape & Reel, or unspecified) do not affect electrical performance. Selection should align with manufacturing assembly processes and procurement logistics.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts carry ROHS3 Compliant status with MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental compliance profile.
Q: Which substitute part offers the best supply availability?
A: Current inventory levels vary. Consult real-time inventory data for 2305-1DCGI8 (5348 Pcs), 2305A-1DCG (7354 Pcs), and 2305-1HDCG8 (4200 Pcs) as reference points for high-availability options.
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