SY89840U Datasheet Precision LVPECL Runt Pulse Eliminator 2:1 Multiplexer

Manufacturer: Micrel Semiconductor

SY89840U precision lvpecl runt pulse eliminator 2:1 multiplexer by Micrel Semiconductor - Datasheet Preview

Datasheet Details

Part number	SY89840U
Manufacturer	Micrel Semiconductor
File Size	611.74 KB
Description	Precision LVPECL Runt Pulse Eliminator 2:1 Multiplexer
Download	SY89840U Download (PDF)

General Description

The SY89840U is a low jitter PECL, 2:1 differential input multiplexer (MUX) optimized for redundant source switchover applications.

Unlike standard multiplexers, the SY89840U unique 2:1 Runt Pulse Eliminator (RPE) MUX prevents any short cycles or “runt” pulses during switchover.

In addition, a unique Fail-Safe Input protection prevents metastable conditions when the selected input clock fails to a DC voltage (voltage between the pins of the differential input drops below 100mV).

Overview

SY89840U Precision LVPECL Runt Pulse Eliminator 2:1 Multiplexer.

Key Features

Precision Edge ®.
Selects between two sources, and provides a glitch-free, stable LVPECL output.
Guaranteed AC performance over temperature and supply voltage:.
Wide operating frequency: 1kHz to >1.5GHz.
< 880ps In-to-Out tpd.
< 190ps tr/tf.
Unique patent-pending input isolation design minimizes crosstalk.
Fail-safe input prevents oscillations.
Ultra-low jitter design:.
140fs RMS phase jitter (Typ).
0.7psrms MUX crosstalk in.

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