SY89468UHY Datasheet PDF - Micrel

●General Description

●The SY89468U is a 2.5V, 1:20 LVDS fanout buffer with a 2:1 differential input multiplexer (MUX). A unique Fail-Safe Input (FSI) protection prevents metastable output conditions when the selected input clock fails to a DC voltage (voltage between the pins of the differential input drops significantly below 100mV).

●Features

●• Selects between two inputs, and provides 20 precision LVDS copies

●• Fail-Safe Input

●   – Prevents outputs from oscillating when input is invalid

●• Guaranteed AC performance over temperature and supply voltage:

●   – DC to >1.5GHz throughput

●   – < 1200ps Propagation Delay (In-to-Q)

●   – < 270ps Rise/Fall times

●• Ultra-low jitter design:

●   – <1psRMS random jitter

●   – <1psRMS cycle-to-cycle jitter

●   – <10psPP total jitter (clock)

●   – <0.7psRMS MUX crosstalk induced jitter

●• Unique, patented MUX input isolation design minimizes adjacent channel crosstalk

●• Unique, patented internal termination and VT pin accepts DC- and AC-coupled inputs (CML, PECL, LVDS)

●• Wide input voltage range VCC to GND

●• 2.5V ±5% supply voltage

●• -40°C to +85°C industrial temperature range

●• Available in 64-pin EPAD-TQFP package

●Applications

●• Fail-safe clock protection

●• Ultra-low jitter LVDS clock or data distribution

●• Rack-based Telecom/Datacom