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ICS8308I

Low Skew 1-To-8 Differential/LVCOMS-TO-LVCMOS Fanout Buffer

ICS8308I PDF File

Description

Integrated Circuit Systems, Inc.
ICS8308I LOW SKEW, 1-TO-8 DIFFERENTIAL/LVCMOS-TO-LVCMOS FANOUT BUFFER FEATURES • 8 LVCMOS/LVTTL outputs (7Ω typical output impedance) • Selectable LVCMOS_CLK or differential CLK, nCLK inputs • CLK, nCLK pair can accept the following differential input levels: LVPECL, LVDS, LVHSTL, SSTL, HCSL • Maximum Output Frequency: 350MHz • Output Skew: (3.
3V± 5%): 100ps (maximum) • Part to Part Skew: (3.
3V± 5%): 1ns (maximum) • Supply Voltage Modes: (Core/Output) 3.
3V/3.
3V 3.
3V/2.
5V 2.
5V/2.
5V • -40°C to 85°C ambient operating temperature • Available in both, Standard and RoHS/Lead-Free compliant packages GENERAL DESCRIPTION The ICS8308I is a low-skew, 1-to-8 Fanout Buffer and a member of the HiPerClockS™ family of High Performance Clock Solutions from ICS.
The ICS8308I has two selectable clock inputs.
The CLK, nCLK pair can accept most differential input levels.
The LVCMOS_CLK can accept LVCMOS or LVTTL input levels.
The low impedance LVCMOS/LVTTL outputs are designed to drive 50 Ω series or parallel terminated transmission lines.
The effective fanout can be increased from 8 to 16 by utilizing the ability of the outputs to drive two series terminated transmission lines.
The ICS8308I is characterized for 3.
3V core/3.
3V output, 3.
3V core/2.
5V output or 2.
5V core/2.
5V output operation.
Guaranteed output and part-part skew characteristics make the 8308I ideal for those clock distribution applications requiring well defined performance and repeatability.
BLOCK DIAGRAM CLK_EN Pullup D Q LE 1 PIN ASSIGNMENT Q0 GND CLK_SEL LVCMOS_CLK CLK nCLK CLK_EN OE VDD GND Q1 VDDO 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VDDO Q2 GND Q3 VDDO Q4 GND Q5 VDDO Q6 GND Q7 LVCMOS_CLK Pullup CLK Pullup nCLK Pulldown CLK_SEL Pullup Q0 0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 ICS8308I 24-Lead, 300-MIL TSSOP 4.
4mm x 7.
8mm x 0.
92mm body package G Package Top View OE Pullup 8308AGI www.
icst.
com/products/hiperclocks.
html 1 REV.
B JULY 25, 2005 Integrated Circuit S...

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