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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Clock Buffers, Drivers

Renesas 85356AMILF

Name: 85356AMILF
Brand: Renesas
SKU: 85356AMILF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 85356AMILF

Manufacturer:: Renesas

Category:: Clock Buffers, Drivers

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: 85356AMILF.pdf

Description:: IC CLK MULTPLX 2:1 900MHZ 20SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

85356AMILF from Renesas Electronics (formerly IDT) is a dual 2:1 differential-to-3.3V LVPECL/ECL clock multiplexer with independent and common select control, supporting input frequencies up to 900MHz, 75ps typical output skew, and operation across –40°C to +85°C ambient. It serves as a high-speed clock routing and level translation device in telecom and datacom timing subsystems.

For engineers reviewing the 85356AMILF datasheet, 85356AMILF pinout, 85356AMILF application, or 85356AMILF equivalent, key selection criteria include differential input compatibility (LVDS/LVPECL/LVHSTL/SSTL/HCSL), dual-channel LVPECL output drive capability, ECL mode support (VEE = –3.0V to –3.8V), and SOIC-20 lead-free packaging for industrial-grade reliability.

Technical Context

The 85356AMILF implements two independent 2:1 differential multiplexers sharing a common select (COM_SEL) and featuring per-channel select inputs (SEL0/SEL1), enabling flexible clock source arbitration. Its differential inputs accept multiple interface standards via internal 51kΩ pullup/pulldown resistors and a wide common-mode range (VEE + 0.5V to VCC – 0.85V).

In LVPECL mode (VCC = 3.0–3.6V, VEE = 0V), it delivers 0.6–1.0V peak-to-peak outputs into 50Ω loads terminated to VCC – 2V; in ECL mode (VCC = 0V, VEE = –3.0V to –3.8V), it supports legacy negative-rail systems while maintaining sub-1.45ns propagation delay and negligible added jitter.

Key Specifications

Parameter	Value and Actual Design Meaning
Max Output Frequency	900MHz - enables use in 10GbE and SONET OC-192 clock paths without frequency limitation.
Output Skew (typ)	75ps - ensures tight phase alignment between Q0/nQ0 and Q1/nQ1 for multi-lane synchronization.
Propagation Delay (typ)	1.15ns - supports low-latency clock switching critical in FPGA-based reconfigurable timing systems.
Input Compatibility	LVPECL, LVDS, LVHSTL, SSTL, HCSL - eliminates need for external level translators in mixed-interface designs.
Supply Range (LVPECL)	VCC = 3.0–3.6V, VEE = 0V - compatible with standard 3.3V logic rails and industrial power domains.
Operating Temperature	–40°C to +85°C - qualified for deployment in uncontrolled ambient environments including base station cabinets.
Package	20-Lead SOIC (M package, 7.5mm × 12.8mm) - surface-mount compatible with automated assembly and thermal management via θJA = 46.2°C/W (multi-layer PCB).

Pinout & Package

85356AMILF is housed in a lead-free 20-lead SOIC (M package) with 1.27mm pitch, 7.5mm × 12.8mm body size, and 2.3mm height. Pin 1 is CLK0A; pins 3 and 8 are no-connect; pins 11 and 14/20 are dedicated power terminals (VEE and VCC respectively).

Pin/Terminal	Circuit Role	Design Meaning
CLK0A / nCLK0A CLK0B / nCLK0B CLK1A / nCLK1A CLK1B / nCLK1B	Differential clock inputs (4 pairs)	Accepts LVPECL/LVDS/LVHSTL/SSTL/HCSL signals; internal 51kΩ pullup/pulldown simplifies control logic interface.
Q0 / nQ0 Q1 / nQ1	Differential LVPECL outputs (2 pairs)	Low-impedance follower outputs requiring 50Ω termination to VCC – 2V for proper DC bias and signal integrity.
SEL0 / SEL1	Per-channel select inputs	LVTTL/LVCMOS-compatible; internal 51kΩ pullup enables default selection without external biasing.
COM_SEL	Global select input	LVTTL/LVCMOS-compatible; internal 51kΩ pulldown sets default to CLKxB/nCLKxB path when unasserted.
VCC (pins 14, 20)	Positive supply	Supplies core logic and output drivers; must be decoupled locally to minimize noise coupling into sensitive clock paths.
VEE (pin 11)	Negative supply	Ground reference in LVPECL mode; –3.0V to –3.8V rail in ECL mode - requires clean, low-noise negative regulator.

Key Features

Feature	Design Value
Dual independent 2:1 mux architecture	Enables simultaneous routing of two clock domains with separate or shared select control - reduces board-level mux IC count by 50%.
Differential input translation	Converts LVDS, LVHSTL, SSTL, or HCSL inputs to 3.3V LVPECL outputs without external components - cuts BOM cost and layout area.
Configurable LVPECL/ECL operation	Single device supports both 3.3V positive-rail (VCC = 3.3V, VEE = 0V) and –3.3V negative-rail (VCC = 0V, VEE = –3.3V) systems - simplifies platform reuse across generations.
Low-additive jitter performance	No measurable jitter addition per datasheet - preserves phase noise integrity in PLL-based clock trees for RF and high-speed serial links.
Industrial temperature qualification	–40°C to +85°C operation with guaranteed AC/DC specs - eliminates derating concerns in outdoor telecom enclosures.

Applications

SONET/SDH Line Cards	Fibre Channel Switch Fabric
Use Scenario: Selecting between primary and backup OC-48/OC-192 line clocks in carrier-grade optical transport equipment. IC Role / Device Role / Timing Role: Dual-channel clock multiplexer providing hitless switchover with <75ps inter-output skew to maintain SONET frame alignment. Use Value: Eliminates need for discrete level shifters and reduces timing path complexity while meeting GR-1244-CORE jitter transfer requirements.	Use Scenario: Routing 1.0625–2.125GHz reference clocks between FC-AL arbiters and port controllers in enterprise storage switches. IC Role / Device Role / Timing Role: Differential clock translator converting LVDS system clocks to LVPECL for SerDes PHY interfaces. Use Value: Enables interoperability between mixed-vendor ASICs using different differential signaling standards without signal degradation.
1/10 Gigabit Ethernet PHY Timing	High-Speed Test Equipment Clock Distribution
Use Scenario: Multiplexing 125MHz/156.25MHz clocks for SFP+ and XFP module interfaces in modular line cards. IC Role / Device Role / Timing Role: Low-skew clock selector feeding dual 10GbE MAC/PHY lanes with matched propagation delay. Use Value: Ensures deterministic latency across parallel data paths, satisfying IEEE 802.3ae clause 49 skew budget limits.	Use Scenario: Distributing ultra-low-jitter reference clocks to multiple DUT channels in ATE platforms operating up to 900MHz. IC Role / Device Role / Timing Role: Jitter-transparent clock fanout and selection element in precision timing subsystems. Use Value: Maintains sub-100fs integrated jitter floor required for high-resolution ADC/DAC characterization at multi-GHz sample rates.

SONET/SDH Line Cards

Fibre Channel Switch Fabric

Use Scenario: Selecting between primary and backup OC-48/OC-192 line clocks in carrier-grade optical transport equipment.

IC Role / Device Role / Timing Role: Dual-channel clock multiplexer providing hitless switchover with <75ps inter-output skew to maintain SONET frame alignment.

Use Value: Eliminates need for discrete level shifters and reduces timing path complexity while meeting GR-1244-CORE jitter transfer requirements.

Use Scenario: Routing 1.0625–2.125GHz reference clocks between FC-AL arbiters and port controllers in enterprise storage switches.

IC Role / Device Role / Timing Role: Differential clock translator converting LVDS system clocks to LVPECL for SerDes PHY interfaces.

Use Value: Enables interoperability between mixed-vendor ASICs using different differential signaling standards without signal degradation.

1/10 Gigabit Ethernet PHY Timing

High-Speed Test Equipment Clock Distribution

Use Scenario: Multiplexing 125MHz/156.25MHz clocks for SFP+ and XFP module interfaces in modular line cards.

IC Role / Device Role / Timing Role: Low-skew clock selector feeding dual 10GbE MAC/PHY lanes with matched propagation delay.

Use Value: Ensures deterministic latency across parallel data paths, satisfying IEEE 802.3ae clause 49 skew budget limits.

Use Scenario: Distributing ultra-low-jitter reference clocks to multiple DUT channels in ATE platforms operating up to 900MHz.

IC Role / Device Role / Timing Role: Jitter-transparent clock fanout and selection element in precision timing subsystems.

Use Value: Maintains sub-100fs integrated jitter floor required for high-resolution ADC/DAC characterization at multi-GHz sample rates.

Equivalent & Alternatives

The following parts are listed as comparable options for similar clock multiplexer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
85356AGILF	TSSOP-20 package (6.5mm × 4.4mm); identical electrical specs and pinout mapping except smaller footprint and higher θJA (73.2°C/W).	Better suited for space-constrained boards where thermal margin allows higher junction temperature rise.	Select 85356AGILF when PCB real estate is limited and airflow or multilayer thermal design compensates for reduced thermal efficiency.
Si53302-D-GM	SiFive clock multiplier/multiplexer with integrated PLL; supports 100MHz–750MHz input; programmable via I²C; no ECL mode support.	Used in software-configurable timing architectures requiring dynamic reconfiguration, not fixed-hardware clock routing.	Choose Si53302-D-GM only when system-level flexibility (e.g., runtime clock tree changes) outweighs the need for deterministic low-jitter pass-through operation.

Compared with 85356AGILF, the 85356AMILF offers superior thermal performance in dense layouts due to lower θJA (46.2°C/W vs. 73.2°C/W), while versus Si53302-D-GM it provides simpler, jitter-transparent signal routing without PLL-induced phase noise or configuration overhead.

Availability

85356AMILF is available at Aetrix Electronics and suitable for SONET line cards, Fibre Channel switch fabrics, 1/10GbE PHY timing, high-speed test equipment clock distribution, and industrial embedded timing applications requiring stable component supply across extended product lifecycles.

Supply support for 85356AMILF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and timing solutions for automotive, industrial, infrastructure, and IoT markets.

The 85356AMILF belongs to Renesas' high-performance clock multiplexer product line, designed specifically for deterministic, low-jitter clock routing in telecom and datacom infrastructure where signal integrity and thermal robustness are non-negotiable.

FAQ

What is the maximum operating frequency supported by the 85356AMILF?

The 85356AMILF supports an output frequency of up to 900MHz under typical conditions, as specified in Table 5 of its datasheet. This rating applies across the full –40°C to +85°C ambient temperature range with VCC = 3.3V ± 0.3V and proper 50Ω load termination. The device adds negligible jitter and maintains timing integrity even at this upper limit, making it suitable for OC-192 and 10GbE applications. The 85356AMILF achieves this performance through optimized differential amplifier design and low-skew internal routing.

Can the 85356AMILF operate in ECL mode, and what are the required supply voltages?

Yes, the 85356AMILF supports ECL mode operation by setting VCC = 0V and VEE = –3.0V to –3.8V, as documented in the General Description and Features sections. In this configuration, it functions as a negative-rail differential multiplexer compatible with legacy ECL systems. The 85356AMILF retains full functionality-including input compatibility, select logic behavior, and output skew performance-while adapting to the inverted supply scheme. This dual-mode capability eliminates the need for separate LVPECL and ECL mux ICs in mixed-voltage platforms.

Does the 85356AMILF require external termination resistors on its LVPECL outputs?

Yes, the 85356AMILF LVPECL outputs require external termination: each differential pair (Q0/nQ0 and Q1/nQ1) must be terminated to VCC – 2V using matched 50Ω loads, as shown in Figures 3A and 3B of the datasheet. This DC-coupled termination establishes correct common-mode voltage and ensures optimal rise/fall times (200–580ps) and output swing (0.6–1.0V). Leaving outputs unterminated or using incorrect termination causes signal distortion, increased jitter, and failure to meet VOH/VOL specifications. The 85356AMILF itself does not integrate termination resistors.

How does the 85356AMILF handle single-ended input signals?

The 85356AMILF accepts single-ended inputs by biasing the complementary input (nCLKx) to VCC/2 using external resistors (R1/R2), as illustrated in Figure 1 of the datasheet. This creates a pseudo-differential interface where the single-ended signal drives CLKx while nCLKx serves as a reference. The 85356AMILF's wide input common-mode range (VEE + 0.5V to VCC – 0.85V) accommodates this configuration. However, noise immunity is reduced compared to true differential operation, and input swing must remain within –0.3V to VCC + 0.3V. The 85356AMILF does not auto-detect or configure for single-ended mode - external biasing is mandatory.

What is the thermal resistance (θJA) of the 85356AMILF in its SOIC package?

The 85356AMILF in its 20-lead SOIC (M) package has a junction-to-ambient thermal resistance (θJA) of 46.2°C/W under forced convection (500 lfpm) on a multilayer PCB, as specified in Table 6A. At zero airflow (still air), θJA rises to 83.2°C/W for single-layer and 46.2°C/W for multilayer boards. These values assume JEDEC-standard test conditions. For reliable operation at maximum load (204mW total power dissipation), the 85356AMILF's junction temperature remains below 125°C up to +85°C ambient when mounted on a multilayer board - confirming its suitability for thermally demanding telecom applications.

85356AMILF Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 20-SOIC (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Obsolete

Type:: Multiplexer

Number of Circuits:: 2

Ratio - Input:Output:: 2:1

Differential - Input:Output:: Yes/Yes

Input:: HCSL, LVDS, LVHSTL, LVPECL, SSTL

Output:: LVPECL

Frequency - Max:: 900 MHz

Voltage - Supply:: 3V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 20-SOIC

85356AMILF FAQ

1.How can I place an order for 85356AMILF through Aetrix?

Please submit a Request for Quotation (RFQ) for 85356AMILF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 85356AMILF reliable?

The price and inventory of 85356AMILF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 85356AMILF is usually 5 days.

3.What payment methods are accepted for 85356AMILF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 85356AMILF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 85356AMILF?

85356AMILF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 85356AMILF order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 85356AMILF?

For technical support, including 85356AMILF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 85356AMILF requirements.

6.How does Aetrix verify that 85356AMILF is sourced from the original manufacturer or authorized distributors?

All 85356AMILF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 85356AMILF meets industry standards.

7.What is the process for return or replacement of 85356AMILF?

All 85356AMILF units undergo pre-shipment inspection (PSI). If there is an issue with 85356AMILF, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 85356AMILF part is unused and in its original packaging.

Return procedure for 85356AMILF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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