PL123-09SC Clock Multiplexer Equivalent & Substitute Parts

Part Overview

The PL123-09SC is a 1:9 clock multiplexer IC manufactured by Microchip Technology, operating at a maximum frequency of 134MHz in a 16-SOIC surface mount package. This device features an integrated PLL with bypass capability and operates across a 3V to 3.6V supply voltage range with an operating temperature range of 0°C to 70°C. The part is currently in active production status and maintains ROHS3 compliance with unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative manufacturers' inventory levels are higher, or when design requirements permit operation within the electrical and mechanical tolerances of functionally equivalent devices.

Substiute Parts

PL123-09SC

Microchip TechnologyIn Stock: 736PL123-09SC Datasheet

Current PartRFQ

2309-1DCGI

Renesas Electronics CorporationIn Stock: 17662309-1DCGI Datasheet

MFR RecommendedRFQ

2309-1HDCG

Renesas Electronics CorporationIn Stock: 24312309-1HDCG Datasheet

MFR RecommendedRFQ

2309A-1DCG

Renesas Electronics CorporationIn Stock: 12072309A-1DCG Datasheet

MFR RecommendedRFQ

NB2309AI1DR2G

onsemiIn Stock: 1413NB2309AI1DR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PL123-09SC is determined by the following critical parameters:

Mechanical Compatibility: All substitute parts must use the 16-SOIC (0.154", 3.90mm Width) surface mount package to ensure PCB footprint compatibility without redesign.

Electrical Compatibility: Substitute parts must support a 1:9 input-to-output ratio, operate within the 3V to 3.6V supply voltage range, and achieve a maximum frequency of at least 133MHz (within 1MHz of the primary part's 134MHz specification).

Functional Equivalence: All substitute parts must feature PLL with bypass capability and single-circuit configuration to maintain functional parity with the primary device.

Compliance Requirements: All substitute parts must maintain ROHS3 compliance and REACH unaffected status to satisfy regulatory requirements.

The following parts meet these substitution criteria:

• 2309-1DCGI (Renesas Electronics Corporation) – Zero Delay Buffer, 133MHz, Active status
• 2309-1HDCG (Renesas Electronics Corporation) – Zero Delay Buffer, 133MHz, Active status
• 2309A-1DCG (Renesas Electronics Corporation) – Zero Delay Buffer, 133MHz, Active status
• NB2309AI1DR2G (onsemi) – Zero Delay Buffer, 133.33MHz, Obsolete status

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Status):

The Renesas Electronics parts 2309-1DCGI, 2309-1HDCG, and 2309A-1DCG are all actively manufactured and represent the preferred substitution options. These parts maintain identical electrical specifications within the defined parameters, operate at 133MHz (1MHz below the primary part), and are fully ROHS3 compliant. The 2309-1HDCG and 2309A-1DCG variants match the primary part's 0°C to 70°C operating temperature range exactly, while 2309-1DCGI extends the lower temperature limit to -40°C. All three Renesas parts carry MSL 3 ratings, requiring controlled storage conditions during 168-hour periods.

Secondary Substitute (Obsolete Status):

The onsemi NB2309AI1DR2G operates at 133.33MHz and maintains an MSL 1 rating identical to the primary part. However, this device carries an obsolete product status, indicating discontinued manufacturing. Selection of this part should be limited to applications where existing inventory is available and long-term supply is not a requirement.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements equivalent to the primary part. MSL rating differences between the primary part (MSL 1) and Renesas substitutes (MSL 3) require adherence to moisture control protocols during storage and handling.

Frequently Asked Questions (FAQ)

Q: Can the 2309-1DCGI replace the PL123-09SC in all applications?

A: The 2309-1DCGI meets all critical electrical and mechanical parameters for substitution. The primary difference is the extended operating temperature range (-40°C to 85°C versus 0°C to 70°C) and MSL 3 rating. If your application operates within 0°C to 70°C, this part is electrically equivalent. MSL 3 requires moisture control during storage.

Q: What is the significance of the 1MHz frequency difference between the primary part (134MHz) and substitute parts (133MHz)?

A: The substitute parts operate at 133MHz, which is 1MHz below the primary part's 134MHz maximum. This difference falls within typical manufacturing tolerances for clock timing devices. Substitution is valid if your application does not require operation at the absolute maximum frequency specification.

Q: Are the Renesas 2309-1HDCG and 2309A-1DCG interchangeable?

A: Both parts share identical electrical specifications, package type, and operating temperature range (0°C to 70°C). The primary distinction is the base product number (2309-1 versus 2309A), which reflects different manufacturing lines. Both are functionally equivalent for the PL123-09SC substitution.

Q: Why is the NB2309AI1DR2G listed as obsolete?

A: The NB2309AI1DR2G carries an obsolete product status, indicating that onsemi has discontinued active manufacturing. This part should only be selected if existing inventory is available. For new designs or long-term supply requirements, select from the active Renesas alternatives.

Q: Does the 16-SOIC package ensure direct PCB compatibility?

A: Yes. All substitute parts use the identical 16-SOIC (0.154", 3.90mm Width) surface mount package. PCB footprints, solder pad layouts, and mounting procedures are directly compatible without design modification.

Q: What precautions are necessary for parts with MSL 3 ratings?

A: MSL 3 rated parts (Renesas 2309 series) require moisture control during storage and handling. These parts must be stored in dry conditions and used within 168 hours of exposure to ambient humidity. The primary part's MSL 1 rating permits unlimited storage without moisture control measures.