SY89468U Series

Catalog

CLOCK BUFFER, FANOUT, 1 GHZ TO 20 OUTPUTS, 2.375 V TO 2.625 V, 64 PINS, TQFP-EP

Part	Frequency - Max [Max]	Mounting Type	Voltage - Supply [Min]	Voltage - Supply [Max]	Number of Circuits	Package / Case	Differential - Input:Output [custom]	Differential - Input:Output [custom]	Ratio - Input:Output [custom]	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Input	Type	Output
Microchip Technology SY89468UHY	1.5 GHz	Surface Mount	2.375 V	2.625 V	1	64-TQFP Exposed Pad			2:20	85 °C	-40 °C	64-TQFP-EP (10x10)	CML, LVDS, PECL	Fanout Buffer (Distribution), Multiplexer	LVDS
Microchip Technology SY89468UHY-TR	1.5 GHz	Surface Mount	2.375 V	2.625 V	1	64-TQFP Exposed Pad			2:20	85 °C	-40 °C	64-TQFP-EP (10x10)	CML, LVDS, PECL	Fanout Buffer (Distribution), Multiplexer	LVDS

Catalog

Key Features

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

• + Prevents outputs from oscillating when input is invalid

• + DC to >1.5GHz throughput

• + <1200ps Propagation Delay (In-to-Q)

• + <270ps Rise/Fall times

• + <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

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).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 270ps.The SY89468U operates from a 2.5V ±5% supply and is guaranteed over the full industrial temperature range of -40°C to +85°C. The SY89468U is part of Micrel's high-speed, Precision Edge® product line.