SY89837 Series

Catalog

ULTRA-LOW JITTER 1:8 LVPECL FANOUT W/ 2:1 RPE MUX 32 VQFN 5X5X0.9MM T/R ROHS COMPLIANT: YES

Part	Ratio - Input:Output [custom]	Ratio - Input:Output [custom]	Package / Case	Type	Number of Circuits	Supplier Device Package	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Frequency - Max [Max]	Voltage - Supply [Max]	Voltage - Supply [Min]	Input	Output
Microchip Technology SY89837UMG-TR
Microchip Technology SY89837UMG-TR	8	2	32-VFQFN Exposed Pad	Fanout Buffer (Distribution), Multiplexer	1	32-QFN (5x5)	Surface Mount	85 °C	-40 °C	2 GHz	3.6 V	2.375 V	CML, LVDS, PECL	LVPECL
Microchip Technology SY89837UMG-TR

Catalog

Key Features

• + Selects between two clocks, and provides 8 precision, low skew LVPECL output copies

• + Guaranteed AC performance over temperature and supply voltage:

• + <975ps in-to-out tpd

• + <180ps tr/tf

• + <40ps output-to-output skew

• + Unique input isolation design minimizes crosstalk

• + 150fs RMS phase jitter

• + <0.7psRMS MUX crosstalk-induced jitter

• + Unique input termination and VTpin accepts DC- or AC-coupled inputs (CML, PECL, LVDS)

• + 800mV LVPECL output swing

• + Power supply +2.5V ±5% or +3.3V ±10%

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

• + Available in 32-pin (5mm x 5mm) QFN package

Description

The SY89837U is a low jitter, low skew, high-speed 1:8 fanout buffer with a unique, 2:1 differential input multiplexer (MUX) optimized for clock redundant switchover applications. Unlike standard multiplexers, the SY89837U unique 2:1 runt pulse eliminator (RPE) input 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 static DC differential voltage (differential input voltage drops below 200mV). The SY89837U distributes clock frequencies from 1kHz to 1.5GHz, guaranteed, over temperature and voltage.The differential input includes Micrel's unique, 3-pin input termination architecture that allows customers to interface to any differential signal (AC- or DC-coupled) as small as 200mV without any level shifting or termination resistor networks in the signal path. The outputs are 800mV, 100k compatible LVPECL with fast rise/fall times guaranteed to be less than 200ps.The SY89837U operates from a +2.5V ±5% or +3.3V ±10% supply and is guaranteed over the full industrial temperature range of -40°C to +85°C. The SY89837U is part of Micrel's high-speed, Precision Edge® product line.