Renesas 854S202AYILF

Overview

854S202AYILF from Renesas Electronics (formerly IDT) is a 12:2 differential-to-LVDS clock multiplexer with dual 3.3V LVDS outputs, twelve selectable differential inputs (LVPECL/LVDS/CML compatible), and guaranteed operation up to 3GHz. It delivers ultra-low skew-50ps max output skew, 100ps max input skew-and 0.16ps typical additive phase jitter (12kHz–20MHz), making it suitable for high-speed serial link timing distribution in telecom infrastructure and FPGA-based test equipment.

For engineers reviewing the 854S202AYILF datasheet, 854S202AYILF pinout, 854S202AYILF application, or 854S202AYILF equivalent, key selection criteria include differential input level flexibility, sub-1.1ns propagation delay, part-to-part skew ≤250ps, LVDS output compliance, and support for independent bank-selectable routing of any input to QA/nQA or QB/nQB outputs under industrial temperature range (−40°C to +85°C).

Technical Context

The 854S202AYILF implements a fully differential signal path with separate 4-bit control buses (SELA_[3:0] and SELB_[3:0]) enabling independent selection of one of twelve differential clock inputs per LVDS output pair. Its architecture supports simultaneous operation of both banks with no inter-bank crosstalk degradation beyond specified MUX isolation (≥75dB at <1.2GHz).

Each CLKx/nCLKx input pair accepts LVPECL, LVDS, or CML signals via internal biasing (VDD/2 default on floating nCLKx), while OEA/OEB pins provide independent LVCMOS/LVTTL-controlled enable/disable of QA/nQA and QB/nQB outputs. Propagation delay is frequency-dependent (≤900ps at >2GHz), and output duty cycle remains within 40–60% across full operating conditions.

Key Specifications

Pinout & Package

854S202AYILF is housed in a lead-free 48-pin LQFP package (7 mm × 7 mm × 1.4 mm, Y suffix), with exposed thermal pad not electrically connected. Power and ground pins are distributed across all four sides for low-inductance decoupling; differential I/Os are arranged to minimize coupling between adjacent pairs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PI6C557-03BLE and SI53302-A-GM, the 854S202AYILF provides the highest input channel density (12), lowest guaranteed output skew (50ps), and simplest pin-strapped control-making it optimal for fixed-architecture, high-channel-count clock distribution where deterministic latency and minimal BOM count are critical.

Availability

854S202AYILF is available at Aetrix Electronics and suitable for 5G infrastructure, high-speed test equipment, and optical transport network line cards requiring stable component supply across extended product lifecycles.

Supply support for 854S202AYILF 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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications.

The 854S202AYILF belongs to Renesas' high-performance timing portfolio, designed specifically for low-skew, multi-source clock distribution in next-generation wired and wireless communication systems.

FAQ

What input voltage levels does the 854S202AYILF support on its CLK/nCLK pins?

The 854S202AYILF accepts LVPECL, LVDS, and CML differential input levels on all twelve CLKx/nCLKx pairs. Input common-mode range is GND + 0.5V to VDD – 0.7V (2.8V to 2.6V at 3.3V supply), and peak-to-peak swing must be 0.15V–1.5V. Internal pullup/pulldown resistors (51kΩ typical) set default bias at VDD/2 when nCLKx is floating, enabling safe single-ended interface adaptation per datasheet Figure 1.

How is output enable controlled on the 854S202AYILF?

The 854S202AYILF uses two dedicated LVCMOS/LVTTL-compatible enable pins: OEA controls QA/nQA, and OEB controls QB/nQB. Both are active-high with internal pullup resistors, so outputs remain enabled by default if left unconnected. Driving either pin low disables its respective LVDS output pair, presenting high-impedance differential states-critical for hot-swap and power-gating scenarios in modular systems.

Does the 854S202AYILF require external termination resistors on its LVDS outputs?

No external termination is required on the 854S202AYILF's LVDS outputs. The device drives into standard 100Ω differential loads, and its output stage is designed to meet LVDS specifications (247–454mV differential swing, 1.2–1.4V common-mode) without added series or parallel components. However, PCB layout must maintain controlled 100Ω differential impedance and place matching termination at the receiver end per JEDEC standards.

What is the maximum guaranteed propagation delay for the 854S202AYILF at 2.5GHz?

At 2.5GHz output frequency, the 854S202AYILF guarantees a maximum propagation delay of 900ps (tpLH and tpHL), as specified in Table 5 for fOUT > 2GHz. This value includes worst-case process/voltage/temperature corners and accounts for both rising and falling edges, ensuring predictable timing margins in high-speed clock tree design.

Can the 854S202AYILF operate with only six of its twelve inputs used?

Yes-the 854S202AYILF supports partial input utilization. Unused CLKx/nCLKx pairs may be left floating per datasheet guidance (Section "Recommendations for Unused Input and Output Pins"), as each nCLKx pin has an internal pullup/pulldown that sets VDD/2 common-mode bias. No external resistors are required, though a 1kΩ resistor to ground on unused CLKx pins is optional for ESD robustness.