PL123-05SC Clock Multiplexer Equivalent & Substitute Parts

Part Overview

The PL123-05SC is a Clock Multiplexer IC manufactured by Microchip Technology, classified as a 1:5 clock distribution device operating at 134MHz maximum frequency. This 8-SOIC surface mount component features integrated PLL with bypass capability and operates across the 3V to 3.6V supply range. The part is currently in active production status with 1,275 units in stock inventory.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when extended operating temperature ranges are needed for specific application environments.

Key Parameters

Parameter	Value
Manufacturer Part Number	PL123-05SC
Manufacturer	Microchip Technology
Category	Clock/Timing
Device Type	IC CLK MULTIPLXR 1:5
Frequency - Max	134MHz
Ratio - Input:Output	1:5
Voltage - Supply	3V ~ 3.6V
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
PLL	Yes with Bypass
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the PL123-05SC is determined by the following critical parameters:

Mandatory Matching Parameters:

Package / Case: 8-SOIC (0.154", 3.90mm Width)
Ratio - Input:Output: 1:5
Voltage - Supply: 3V ~ 3.6V
Mounting Type: Surface Mount
PLL: Yes with Bypass
Frequency - Max: 133MHz or higher

Compatible Substitute Categories:

The Renesas Electronics Corporation 2305 series Zero Delay Buffer ICs meet all mandatory electrical and mechanical parameters. These devices function as direct functional equivalents, providing 1:5 clock distribution with integrated PLL bypass capability in the identical 8-SOIC package footprint. The 2305 series variants differ primarily in operating temperature range and packaging format (Tube or Tape & Reel), allowing selection based on specific application requirements and manufacturing processes.

Parameter Comparison

Parameter	PL123-05SC	2305-1DCGI	2305-1DCGI8	2305-1HDCG	2305-1HDCGI	2305A-1DCG	2305A-1DCGI	2305A-1DCGI8	2305A-1HDCG	2305A-1HDCGI	2305B-1DCG
Manufacturer	Microchip Technology	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics
Device Type	Clock Multiplexer	Zero Delay Buffer	Zero Delay Buffer	Zero Delay Buffer	Zero Delay Buffer	Zero Delay Buffer	Zero Delay Buffer	Zero Delay Buffer	Zero Delay Buffer	Zero Delay Buffer	Zero Delay Buffer
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	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C	0°C ~ 70°C
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)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
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
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	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging Format	Tube	Tube	Not Specified	Tube	Tube	Tube	Tube	Tape & Reel (TR)	Tube	Tube	Tube
Inventory Status	1,275 Pcs	1,202 Pcs	5,348 Pcs	2,256 Pcs	1,239 Pcs	7,354 Pcs	1,642 Pcs	3,788 Pcs	1,592 Pcs	1,490 Pcs	1,330 Pcs

Engineering Selection Recommendations

All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the primary PL123-05SC device. Selection among substitute options is determined by application-specific operating temperature requirements and manufacturing process compatibility.

For applications requiring 0°C to 70°C operating range: Select from 2305-1HDCG, 2305A-1DCG, 2305A-1HDCG, or 2305B-1DCG. These variants provide identical thermal performance to the PL123-05SC within the specified temperature envelope.

For applications requiring extended -40°C to 85°C operating range: Select from 2305-1DCGI, 2305-1DCGI8, 2305-1HDCGI, 2305A-1DCGI, 2305A-1DCGI8, or 2305A-1HDCGI. These variants extend operational capability across wider temperature extremes.

For manufacturing processes requiring Tape & Reel packaging: The 2305A-1DCGI8 variant provides identical electrical specifications with TR packaging format, supporting automated assembly workflows.

All substitute parts are currently in active production status with confirmed inventory availability.

Frequently Asked Questions (FAQ)

Q: What determines if a part can substitute for the PL123-05SC?

A: Substitution requires matching the following parameters: 8-SOIC package footprint, 1:5 input-to-output ratio, 3V to 3.6V supply voltage, surface mount mounting type, integrated PLL with bypass capability, and maximum frequency of 133MHz or higher. All listed Renesas 2305 series devices meet these criteria.

Q: Are there functional differences between the PL123-05SC and the 2305 series substitutes?

A: The primary functional difference is device classification: the PL123-05SC is designated as a Clock Multiplexer, while the 2305 series are Zero Delay Buffer ICs. Both device types provide equivalent 1:5 clock distribution functionality with integrated PLL bypass. The 2305 series additionally specify LVTTL input and CMOS/LVCMOS/TTL output compatibility.

Q: How do operating temperature ranges affect substitution?

A: The PL123-05SC operates from 0°C to 70°C. Substitute parts are available in two temperature grades: 0°C to 70°C (matching the original specification) and -40°C to 85°C (extended range). Parts with extended temperature ranges are electrically compatible and can be used in applications requiring the narrower 0°C to 70°C range without performance degradation.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging is suitable for manual assembly and lower-volume production processes. Tape & Reel (TR) packaging is designed for automated pick-and-place assembly equipment. Both formats contain identical components; selection depends on manufacturing process requirements. The 2305A-1DCGI8 is the only listed substitute available in TR format.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory certifications of the PL123-05SC.

Q: Which substitute part offers the highest inventory availability?

A: The 2305A-1DCG variant currently maintains the highest inventory level at 7,354 units, followed by 2305A-1DCGI8 at 3,788 units. Both parts are available in standard Tube or TR packaging formats.

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