SN65EL11DR Clock Fanout Buffer Equivalent & Substitute Parts

Part Overview

The SN65EL11DR is a Clock Fanout Buffer (Distribution) IC manufactured by Texas Instruments, designed for 1:2 clock distribution at frequencies up to 4.6 GHz. This device features differential ECL/PECL input and output, operating across a supply voltage range of 4.2V to 5.7V, and is housed in an 8-SOIC surface mount package. The SN65EL11DR is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

SN65EL11DR

Texas InstrumentsIn Stock: 5908SN65EL11DR Datasheet

Current PartRFQ

MC100EL11DG

onsemiIn Stock: 1316MC100EL11DG Datasheet

MFR RecommendedRFQ

MC100EL11DR2G

onsemiIn Stock: 21097MC100EL11DR2G Datasheet

MFR RecommendedRFQ

MC10EL11DG

onsemiIn Stock: 2240MC10EL11DG Datasheet

MFR RecommendedRFQ

MC10EL11DR2G

onsemiIn Stock: 5871MC10EL11DR2G Datasheet

MFR RecommendedRFQ

SY100EP11UZG

Microchip TechnologyIn Stock: 2173SY100EP11UZG Datasheet

MFR RecommendedRFQ

SY100EP11UZG-TR

Microchip TechnologyIn Stock: 3421SY100EP11UZG-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN65EL11DR are selected based on strict electrical and mechanical compatibility criteria. The following parameters determine valid substitution:

Critical Parameters for Substitution:

• Package / Case: 8-SOIC (0.154", 3.90mm Width) — all substitutes must match
• Ratio - Input:Output: 1:2 — functional requirement
• Differential Input: Yes (ECL, PECL) — signal interface requirement
• Differential Output: Yes (ECL, PECL) — signal interface requirement
• Mounting Type: Surface Mount — assembly compatibility
• Operating Temperature Range: -40°C ~ 85°C — environmental requirement
• Voltage - Supply: 4.2V ~ 5.7V minimum overlap — power supply compatibility

Frequency Consideration: The SN65EL11DR operates at a maximum frequency of 4.6 GHz. Substitute parts with lower maximum frequencies (1.5 GHz) are functionally compatible for applications operating below their rated frequency limits. Substitute parts with equal or higher maximum frequencies provide direct compatibility.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are active products with ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity ratings, meeting the environmental and regulatory requirements of the obsolete SN65EL11DR.

onsemi MC100EL11 Series (MC100EL11DG, MC100EL11DR2G): These parts provide direct functional substitution with identical electrical specifications except for maximum frequency (1.5 GHz versus 4.6 GHz). Selection between tube (MC100EL11DG) and tape & reel (MC100EL11DR2G) packaging depends on assembly requirements. These parts are suitable for applications operating at frequencies up to 1.5 GHz.

onsemi MC10EL11 Series (MC10EL11DG, MC10EL11DR2G): These parts provide direct functional substitution with identical electrical specifications except for maximum frequency (1.5 GHz versus 4.6 GHz). Selection between tube (MC10EL11DG) and tape & reel (MC10EL11DR2G) packaging depends on assembly requirements. These parts are suitable for applications operating at frequencies up to 1.5 GHz.

Microchip Technology SY100EP11 Series (SY100EP11UZG, SY100EP11UZG-TR): These parts provide enhanced substitution with maximum frequency of 3 GHz, closer to the original 4.6 GHz specification. The SY100EP11 series supports extended input/output signal types (LVECL, LVPECL in addition to ECL and PECL) and operates across a wider supply voltage range (2.375V ~ 5.5V). Selection between tube (SY100EP11UZG) and tape & reel (SY100EP11UZG-TR) packaging depends on assembly requirements.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a lower maximum frequency than the SN65EL11DR?

A: Yes, if your application operates at frequencies below the substitute part's maximum rating. The MC100EL11 and MC10EL11 series are rated to 1.5 GHz and are suitable for applications operating at or below this frequency. The SY100EP11 series is rated to 3 GHz and provides closer frequency matching to the original 4.6 GHz specification.

Q: What is the difference between tube and tape & reel packaging options?

A: Tube packaging (DG suffix) is suitable for manual assembly or lower-volume production. Tape & reel packaging (DR2G or -TR suffix) is designed for automated pick-and-place assembly and higher-volume production. Both packaging options contain identical die and electrical specifications.

Q: Are all substitute parts pin-compatible with the SN65EL11DR?

A: Yes. All substitute parts use the 8-SOIC (0.154", 3.90mm Width) package with identical pinout and surface mount footprint, ensuring direct board-level compatibility.

Q: Which substitute part provides the best frequency match to the SN65EL11DR?

A: The Microchip Technology SY100EP11 series (SY100EP11UZG or SY100EP11UZG-TR) provides the closest frequency match at 3 GHz, compared to the original 4.6 GHz specification. The onsemi MC100EL11 and MC10EL11 series are limited to 1.5 GHz.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, meeting the environmental and regulatory requirements of the original SN65EL11DR.

Q: Can I use the SY100EP11 series in applications requiring ECL or PECL signaling only?

A: Yes. The SY100EP11 series supports ECL and PECL input/output in addition to LVECL and LVPECL, providing backward compatibility with existing ECL/PECL designs while offering extended signal type flexibility.