33 17, 3.2 Gbps Digital Crosspoint Switch AD8151 FEATURES APPLICATIONS Low cost High speed serial backplane routing to Sonet OC-48 applications with FEC 33 17, fully differential, nonblocking array Fiber optic network switching 3.2 Gbps per port NRZ data rate Fiber channel Wide power supply range: +3.3 V, 3.3 V LVDS Low power FUNCTIONAL BLOCK DIAGRAM 425 mA (outputs enabled) INP INN 35 mA (outputs disabled) LV PECL- and LV ECL-compatible CS RE CMOS/TTL-level control inputs: 3 V to 5 V 33 33 Low jitter 7 17 D OUTP No heat sinks required FIRST SECOND 33 17 RANK RANK DIFFERENTIAL 17 17 Drives a backplane directly SWITCH 7-BIT 7-BIT MATRIX 5 LATCH LATCH 17 A OUTN Programmable output current Optimize termination impedance User-controlled voltage at the load AD8151 WE Minimize power dissipation UPDATE Individual output disable for busing and reducing power RESET Double row latch Figure 1. Buffered inputs 184-lead LQFP package . GENERAL DESCRIPTION 1 The AD8151 is a member of the Xstream line of products, offering a breakthrough in digital switching and a large switch array (33 17) on very little powertypically less than 1.5 W. It also operates at data rates in excess of 3.2 Gbps per port, making it suitable for Sonet OC-48 applications with 8/10-bit forward-error correction (FEC). Furthermore, the price of the AD8151 makes it affordable enough to be used for lower data rates. The AD8151s flexible supply voltages allow the user to operate with either emitter-coupled logic (ECL) or positive emitter-coupled logic (PECL) data levels, and with 3.3 V for further power reduction. The control interface is CMOS- /TTL-compatible (3 V to 5 V). 70ps/DIV Figure 2. Eye Pattern, 3.2 Gbps, PRBS 23 Its fully differential signal path reduces jitter and crosstalk, while allowing the use of smaller, single-ended voltage swings. 1 Patent pending. The AD8151 is offered in a 184-lead LQFP package that operates over the extended commercial temperature range of 0C to 85C. Rev. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 150mV/DIV OUTPUT ADDRESS DECODER INPUT DECODERS 02169-002 02169-001AD8151 TABLE OF CONTENTS Features .............................................................................................. 1 Control Interface ............................................................................ 17 Applications....................................................................................... 1 Control Pin Description............................................................ 17 Functional Block Diagram .............................................................. 1 Control Interface Translators.................................................... 18 General Description ......................................................................... 1 Circuit Description......................................................................... 19 Revision History ............................................................................... 2 Applications..................................................................................... 23 Specifications..................................................................................... 3 Input and Output Busing .......................................................... 23 Absolute Maximum Ratings............................................................ 4 Evaluation Board........................................................................ 23 Maximum Power Dissipation ..................................................... 4 Power Supplies............................................................................ 24 ESD Caution.................................................................................. 4 Configuration Programming.................................................... 25 Pin Configuration and Function Descriptions............................. 5 Software Installation .................................................................. 25 Typical Performance Characteristics ............................................. 9 Software Operation .................................................................... 26 Control Interface Truth Tables...................................................... 13 Outline Dimensions....................................................................... 38 Control Interface Timing Diagrams ............................................ 14 Ordering Guide .......................................................................... 38 Control Interface Programming Example .............................. 16 REVISION HISTORY 12/05Rev. A to Rev. B Changes to Table 1............................................................................ 3 Changes to Figure 4.......................................................................... 5 Changes to Table 3............................................................................ 6 Changes to Table 4.......................................................................... 13 Changes to Figure 51...................................................................... 35 Changes to Ordering Guide .......................................................... 38 9/05Rev. 0 to Rev. A Updated Format..............................................................Universal Change to Figure 51 ................................................................... 34 Change to Ordering Guide........................................................ 37 4/01Revision 0: Initial Version Rev. B Page 2 of 40