SY89847 Series

Catalog

CLOCK BUFFER, FANOUT, 1.5 GHZ TO 5 OUTPUTS, 2.375 V TO 2.625 V, 32 PINS, QFN-EP

Part	Frequency - Max [Max]	Ratio - Input:Output	Number of Circuits	Supplier Device Package	Mounting Type	Input	Voltage - Supply [Min]	Voltage - Supply [Max]	Type	Output	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case
Microchip Technology SY89847UMG	2 GHz	2:5	1	32-QFN (5x5)	Surface Mount	CML, LVDS, PECL	2.375 V	2.625 V	Fanout Buffer (Distribution), Multiplexer	LVDS	85 °C	-40 °C	32-VFQFN Exposed Pad
Microchip Technology SY89847UMG
Microchip Technology SY89847UMG-TR	2 GHz	2:5	1	32-QFN (5x5)	Surface Mount	CML, LVDS, PECL	2.375 V	2.625 V	Fanout Buffer (Distribution)	LVDS	85 °C	-40 °C	32-VFQFN Exposed Pad
Microchip Technology SY89847UMG-TR
Microchip Technology SY89847UMG-TR
Microchip Technology SY89847UMG

Catalog

Key Features

• + Selects between two sources, and provides 5 precision LVDS copies

• + Prevents outputs from oscillating when input is invalid

• + DC-to >1.5GHz throughput

• + <1000ps Propagation Delay (IN-to-Q)

• + <210ps Rise/Fall times

• + 150fsRMS phase jitter (typ.)

• + <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 32-pin (5mm x 5mm) QFN package

Description

The SY89847U is a 2.5V, 1:5 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).The differential input includes Micrel's unique, 3-pin internal termination architecture that can interface to any differential signal (AC- or DC-coupled) as small as 100mV (200mVPP) without any level shifting or termination resistor networks in the signal path. The outputs are LVDS compatible with very fast rise/fall times guaranteed to be less than 210ps.The SY89847U operates from a 2.5V ±5% supply and is guaranteed over the full industrial temperature range of -40°C to +85°C. The SY89847U is part of Micrel's high-speed, Precision Edge® product line.