SY10E111AEJC Equivalent & Substitute Parts

Part Overview

The SY10E111AEJC is a Clock Fanout Buffer (Distribution) IC manufactured by Microchip Technology, featuring a 1:9 input-to-output ratio with PECL differential signaling. This component is designed for precision clock distribution in high-speed digital systems. The part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain compatibility with existing system requirements.

Substiute Parts

SY10E111AEJC

Microchip TechnologyIn Stock: 30107SY10E111AEJC Datasheet

Current PartRFQ

CDC111FN

Texas InstrumentsIn Stock: 2225CDC111FN Datasheet

MFR RecommendedRFQ

MC100E111FNG

onsemiIn Stock: 36191MC100E111FNG Datasheet

MFR RecommendedRFQ

MC100E111FNR2G

onsemiIn Stock: 2383MC100E111FNR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SY10E111AEJC is determined by the following critical parameters:

• Fanout Ratio: Must maintain 1:9 input-to-output configuration
• Differential Signaling: Both input and output must support differential operation
• Package Compatibility: 28-LCC (J-Lead) form factor for direct PCB replacement
• Signal Level Compatibility: Input and output signal standards must be compatible with PECL or related ECL-family standards
• Supply Voltage Range: Must overlap with or encompass the 3V to 5.5V operating range
• Mounting Type: Surface mount configuration required

The three substitute parts identified—CDC111FN (Texas Instruments), MC100E111FNG (onsemi), and MC100E111FNR2G (onsemi)—meet these core substitution criteria through equivalent fanout ratios, differential signaling architecture, and identical package specifications.

Parameter Comparison

Engineering Selection Recommendations

CDC111FN (Texas Instruments) is the preferred substitute for new designs and long-term availability. This part maintains active product status, ensuring continued supply and support. It provides ROHS3 compliance and operates within a 3V to 3.6V supply range, which overlaps with the lower end of the original part's specification. The 500 MHz maximum frequency specification supports high-speed clock distribution applications. Operating temperature range of 0°C to 70°C is narrower than the original part but suitable for standard industrial environments.

MC100E111FNG and MC100E111FNR2G (onsemi) are functionally equivalent alternatives with extended frequency capability (800 MHz) and broader operating temperature range (-40°C to 85°C). Both parts are marked as obsolete, indicating limited future availability. These parts support both ECL and PECL signal standards, providing broader compatibility with legacy systems. Supply voltage range of 4.2V to 5.7V encompasses the upper portion of the original specification. ROHS3 compliance is provided by both variants.

For applications requiring the lowest supply voltage operation (3V), CDC111FN is the only substitute that maintains this capability. For applications requiring extended temperature range or higher frequency performance, the onsemi variants provide enhanced specifications, though with reduced availability assurance.

Frequently Asked Questions (FAQ)

Q: Can CDC111FN directly replace SY10E111AEJC in existing designs?

A: CDC111FN maintains identical 1:9 fanout ratio, differential input/output configuration, and 28-LCC package form factor. However, the supply voltage range differs: CDC111FN operates at 3V to 3.6V, while SY10E111AEJC operates at 3V to 5.5V. Direct replacement is possible only if the system supply voltage is within the 3V to 3.6V window. Signal level compatibility between PECL (original) and LVPECL (CDC111FN) must be verified for your specific application.

Q: What is the difference between MC100E111FNG and MC100E111FNR2G?

A: Both parts are functionally identical in electrical specifications, featuring 1:9 fanout ratio, 800 MHz maximum frequency, and -40°C to 85°C operating temperature. The primary difference is packaging designation: MC100E111FNG is supplied in tube packaging, while MC100E111FNR2G has unspecified packaging. Both are marked as obsolete products.

Q: Are all substitute parts pin-compatible with the original SY10E111AEJC?

A: All substitute parts use the 28-LCC (J-Lead) package with identical physical dimensions (approximately 11.48mm to 11.51mm). Pin compatibility is confirmed for the fanout buffer function. However, signal level differences (PECL versus LVPECL versus ECL) require verification of input/output driver compatibility in your specific circuit topology.

Q: Which substitute part should be selected for new product designs?

A: CDC111FN is recommended for new designs due to active product status, ensuring long-term availability and manufacturing consistency. This part provides ROHS3 compliance and operates within the lower supply voltage range of the original specification.

Q: What are the supply voltage constraints when substituting these parts?

A: The original SY10E111AEJC operates at 3V to 5.5V. CDC111FN operates at 3V to 3.6V (narrower range). MC100E111FNG and MC100E111FNR2G operate at 4.2V to 5.7V (different range, no overlap at 3V). System supply voltage must fall within the substitute part's specified range for proper operation.

Q: Are there temperature range limitations when using substitute parts?

A: SY10E111AEJC operates at 0°C to 85°C. CDC111FN operates at 0°C to 70°C (narrower upper limit). MC100E111FNG and MC100E111FNR2G operate at -40°C to 85°C (extended lower range). Application temperature requirements must be verified against each substitute part's specification.