Renesas Electronics 843011CGLF Clock/Frequency Synthesizer Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 843011CGLF is a Clock/Frequency Synthesizer IC operating at 106.25MHz with LVPECL output, housed in an 8-TSSOP surface mount package. This component is classified as obsolete, necessitating identification of active alternative parts that maintain functional and electrical compatibility for existing designs requiring clock synthesis at this frequency and output standard.

Substiute Parts

843011CGLF

Renesas Electronics CorporationIn Stock: 981843011CGLF Datasheet

Current PartRFQ

SM843001-106KA

Microchip TechnologyIn Stock: 1023SM843001-106KA Datasheet

MFR RecommendedRFQ

SM843001-212KA

Microchip TechnologyIn Stock: 1086SM843001-212KA Datasheet

MFR RecommendedRFQ

SM843031-01KA

Microchip TechnologyIn Stock: 1001SM843031-01KA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 843011CGLF are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Package / Case: 8-TSSOP (0.173", 4.40mm Width) — identical physical footprint required for PCB compatibility
• Output Type: LVPECL — maintains signal integrity and interface compatibility
• Input Type: Crystal — preserves clock source architecture
• PLL: Yes — ensures frequency synthesis capability
• Number of Circuits: 1 — single output channel configuration
• Ratio - Input:Output: 1:1 — maintains frequency relationship
• Differential - Input:Output: No/Yes — preserves differential output characteristics
• RoHS Status: ROHS3 Compliant — ensures regulatory compliance
• Moisture Sensitivity Level (MSL): 1 (Unlimited) — allows unrestricted storage and handling

Frequency Consideration: The 843011CGLF operates at 106.25MHz. Substitute parts are grouped by their maximum frequency capability. Parts operating at the same frequency (106.25MHz) provide direct functional replacement. Parts with higher frequency ratings (212.5MHz, 312.5MHz) are electrically compatible but serve different application requirements.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (106.25MHz Requirement): The SM843001-106KA from Microchip Technology is the primary substitute for the 843011CGLF. This part maintains identical frequency specification (106.25MHz), matching package (8-TSSOP), identical output type (LVPECL), and equivalent electrical characteristics. Both parts are ROHS3 compliant with MSL 1 rating. The SM843001-106KA is currently in active production status, ensuring long-term availability and supply chain stability.

Extended Frequency Alternatives: The SM843001-212KA and SM843031-01KA are electrically compatible substitutes with higher frequency ratings (212.5MHz and 312.5MHz respectively). These parts share identical package, output type, input type, and compliance certifications. Selection of these higher-frequency variants is appropriate only when the application design permits operation at elevated frequencies or when future frequency scaling is anticipated.

Supply Voltage Consideration: Microchip substitute parts operate across a wider supply voltage range (2.375V ~ 3.465V) compared to the Renesas original (3.135V ~ 3.465V). This expanded range provides additional design flexibility and is fully compatible with the original specification range.

Operating Temperature Range: Microchip substitutes support an extended operating temperature range (-40°C ~ 85°C) versus the Renesas original (0°C ~ 70°C). This extended range does not compromise compatibility and provides enhanced performance margin for demanding thermal environments.

Frequently Asked Questions (FAQ)

Q: Can the SM843001-106KA directly replace the 843011CGLF without PCB modifications? A: Yes. Both parts use identical 8-TSSOP packaging with matching pinout and electrical characteristics. No PCB layout changes are required for direct substitution.

Q: What is the primary difference between the three Microchip substitute options? A: The three Microchip parts differ in maximum frequency rating: SM843001-106KA operates at 106.25MHz (matching the original), SM843001-212KA at 212.5MHz, and SM843031-01KA at 312.5MHz. All other electrical and physical parameters remain identical. Selection depends on the specific frequency requirement of the application.

Q: Are the Microchip substitutes compatible with the original supply voltage specification? A: Yes. The Microchip parts operate across 2.375V ~ 3.465V, which encompasses the original Renesas specification of 3.135V ~ 3.465V. Existing power supply designs require no modification.

Q: Do the substitute parts maintain RoHS and MSL compliance? A: Yes. All Microchip substitute parts are ROHS3 compliant with MSL 1 (Unlimited) rating, matching the original part's compliance status.

Q: Why do the Microchip substitutes have a wider operating temperature range? A: The extended temperature range (-40°C ~ 85°C versus 0°C ~ 70°C) reflects Microchip's design specifications for these product lines. This expanded range is fully compatible with applications designed for the original temperature specification and provides additional margin for thermal stress conditions.

Q: Which substitute should be selected for new designs? A: For applications requiring 106.25MHz operation, the SM843001-106KA is the appropriate selection. For applications with higher frequency requirements or future frequency scaling potential, the SM843001-212KA or SM843031-01KA may be considered based on specific system architecture.