ICS853111BYLFT Equivalent & Substitute Parts

Part Overview

The ICS853111BYLFT is a clock fanout buffer (distribution) multiplexer IC manufactured by Renesas Electronics Corporation, designed for 2:10 signal distribution at frequencies up to 3 GHz. This device accepts differential inputs in CML, LVDS, LVPECL, and SSTL formats, and provides ECL and LVPECL differential outputs. The part is packaged in a 32-LQFP surface mount configuration with a supply voltage range of 2.375V to 3.8V and operating temperature range of -40°C to 85°C.

The ICS853111BYLFT is currently listed as obsolete. Identifying suitable substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and system upgrades.

Key Parameters

Parameter	Value
Type	Fanout Buffer (Distribution), Multiplexer
Ratio - Input:Output	2:10
Differential Input	Yes
Differential Output	Yes
Input Formats	CML, LVDS, LVPECL, SSTL
Output Formats	ECL, LVPECL
Frequency - Max	3 GHz
Voltage - Supply	2.375V ~ 3.8V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	32-LQFP
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the ICS853111BYLFT is determined by the following critical parameters:

Ratio (Input:Output): Must be 2:10
Differential Input and Output: Both must be Yes
Frequency - Max: Must support 3 GHz or higher
Voltage - Supply: Must support 2.375V ~ 3.8V range
Operating Temperature: Must support -40°C ~ 85°C range
Mounting Type: Must be Surface Mount
Package / Case: Must be 32-LQFP or 32-TQFP (functionally equivalent)

Substitute parts are grouped into two categories based on maximum frequency capability:

Category A - 4.6 GHz Maximum Frequency (Enhanced Performance): Texas Instruments CDCLVP110 and CDCLVP111 series parts provide higher frequency capability (4.6 GHz) while maintaining full compatibility with the ICS853111BYLFT electrical specifications and package footprint.

Category B - 3 GHz Maximum Frequency (Direct Equivalent): onsemi M100LVEP111 and MC100LVEP111 series, and Microchip Technology SY100EP111 series provide direct frequency equivalence at 3 GHz with compatible input/output formats and packaging.

Parameter Comparison

Parameter	ICS853111BYLFT	CDCLVP110MVFR	CDCLVP111VFR	M100LVEP111FATWG	MC100LVEP111FARG	SY100EP111UTG-TR
Manufacturer	Renesas	Texas Instruments	Texas Instruments	onsemi	onsemi	Microchip
Ratio - Input:Output	2:10	2:10	2:10	2:10	2:10	2:10
Differential Input	Yes	Yes	Yes	Yes	Yes	Yes
Differential Output	Yes	Yes	Yes	Yes	Yes	Yes
Frequency - Max	3 GHz	4.6 GHz	4.6 GHz	3 GHz	3 GHz	3 GHz
Voltage - Supply	2.375V ~ 3.8V	2.375V ~ 3.8V	2.375V ~ 3.8V	2.375V ~ 3.8V	2.375V ~ 3.8V	2.375V ~ 3.8V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	32-LQFP	32-LQFP	32-LQFP	32-LQFP	32-LQFP	32-TQFP
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	2 (1 Year)	1 (Unlimited)

Engineering Selection Recommendations

All identified substitute parts are currently in active production status, ensuring long-term availability and supply chain stability. The following selection criteria apply:

For Direct Frequency Equivalence (3 GHz): MC100LVEP111FARG, M100LVEP111FATWG, and SY100EP111UTG-TR provide exact frequency matching to the ICS853111BYLFT. All three are ROHS3 compliant and actively manufactured. MC100LVEP111FARG offers the highest inventory availability (31,195 pcs) and is recommended as the primary substitute. SY100EP111UTG-TR is packaged in 32-TQFP, which is footprint-compatible with 32-LQFP designs.

For Enhanced Frequency Performance (4.6 GHz): CDCLVP110MVFR and CDCLVP111VFR from Texas Instruments provide 500 MHz additional frequency headroom while maintaining full electrical compatibility. These parts feature superior moisture sensitivity ratings (MSL 1 vs. MSL 3 on the original part) and are ROHS3 compliant. CDCLVP111VFR is recommended when input format flexibility is required, as it supports CML, LVDS, LVPECL, and SSTL inputs, matching the original part's input capability.

Compliance Considerations: All substitute parts carry REACH Unaffected status and EAR99 ECCN classification, matching the regulatory profile of the ICS853111BYLFT. ROHS3 compliance is universal across all active substitutes, providing environmental compliance advantages over the original obsolete part.

Frequently Asked Questions (FAQ)

Q: Can CDCLVP110 and CDCLVP111 series parts be used interchangeably with the ICS853111BYLFT?

A: Yes, within the constraints of input format requirements. CDCLVP110 series accepts HSTL and LVPECL inputs, while CDCLVP111 series accepts CML, LVDS, LVPECL, and SSTL inputs. If your design uses CML, LVDS, or SSTL input signals, CDCLVP111VFR is the appropriate substitute. For HSTL or LVPECL-only designs, CDCLVP110MVFR is suitable.

Q: What is the difference between 32-LQFP and 32-TQFP packages?

A: Both packages are 32-pin surface mount configurations with identical 7x7mm footprints and pin assignments. The primary difference is in the lead frame design. 32-TQFP (thin quad flat pack) and 32-LQFP (low-profile quad flat pack) are functionally interchangeable for PCB layout purposes. SY100EP111UTG-TR uses 32-TQFP packaging and is compatible with existing 32-LQFP footprints.

Q: Why do some substitutes have higher maximum frequency ratings (4.6 GHz vs. 3 GHz)?

A: Texas Instruments CDCLVP110 and CDCLVP111 series are designed with enhanced bandwidth specifications. These parts maintain full compatibility with 3 GHz system designs while providing additional frequency margin for future upgrades or performance optimization. The higher frequency rating does not affect compatibility with 3 GHz applications.

Q: What is the significance of MSL (Moisture Sensitivity Level) differences?

A: The ICS853111BYLFT carries MSL 3 (168 hours), requiring controlled storage and handling. Substitute parts with MSL 1 (unlimited) or MSL 2 (1 year) offer improved shelf life and reduced handling constraints. Lower MSL ratings reduce the risk of moisture-induced failures during storage and assembly processes.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts carry ROHS3 compliance certification. The original ICS853111BYLFT does not specify RoHS status. Substitution with ROHS3-compliant parts ensures compliance with current environmental regulations and procurement standards.

Q: Which substitute part offers the best inventory availability?

A: MC100LVEP111FARG from onsemi has the highest documented inventory (31,195 pcs), making it the most readily available substitute. This part provides direct 3 GHz frequency equivalence and is packaged in 32-LQFP with tape & reel (TR) packaging suitable for automated assembly.

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