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AD8153 Datasheet(PDF) 1 Page - Analog Devices |
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AD8153 Datasheet(HTML) 1 Page - Analog Devices |
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3.2 Gbps Single Buffered Mux/Demux Switch AD8153 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2007 Analog Devices, Inc. All rights reserved. FEATURES Single lane 2:1 mux/1:2 demux 3.2 Gbps to dc data rates Compensates over 40 inches of FR4 at 3.2 Gbps through Two levels of input equalization, or Four levels of output pre-emphasis Operates with ac- or dc-coupled differential I/O Low deterministic jitter, typically 16 ps p-p Low random jitter, typically 500 fs rms On-chip terminations Unicast or bicast on 1:2 demux function Loopback capability on all ports 3.3 V core supply Flexible I/O supply Low power, typically 200 mW in basic configuration1 32-lead LFCSP package −40°C to +85°C operating temperature range APPLICATIONS Low cost redundancy switch SONET OC48/SDH16 and lower data rates Gigabit Ethernet over backplane Fibre Channel 1.06 Gbps and 2.12 Gbps over backplane Serial RapidIO PCI Express Gen 1 Infiniband over backplane FUNCTIONAL BLOCK DIAGRAM RECEIVE EQUALIZATION TRANSMIT PRE-EMPHASIS 2:1 MULTIPLEXER/ 1:2 DEMULTIPLEXER TRANSMIT PRE-EMPHASIS RECEIVE EQUALIZATION CONTROL LOGIC SEL BICAST LB_A LB_B LB_C MODE RESETB EQ_A/(SCL) EQ_B/(SDA) EQ_C PE_A/(I2C_A[0]) PE_B/(I2C_A[1]) PE_C/(I2C_A[2]) INPUT A INPUT B OUTPUT A OUTPUT B OUTPUT C INPUT C AD8153 EQ EQ EQ Figure 1. GENERAL DESCRIPTION The AD8153 is an asynchronous, protocol agnostic, single-lane 2:1 switch with three differential CML inputs and three differential CML outputs. The AD8159, another member of the Xstream line of products, is suitable for similar applications that require more than one lane. The AD8153 is optimized for NRZ signaling with data rates of up to 3.2 Gbps per port. Each port offers two levels of input equalization and four levels of output pre-emphasis. The device consists of a 2:1 multiplexer and a 1:2 demultiplexer. There are three operating modes: pin mode, serial mode, and mixed mode. In pin mode, lane switching, equalization, and pre-emphasis are controlled exclusively using external pins. In serial mode, an I2C interface is used to control the device and to provide access to advanced features, such as additional pre- emphasis settings and output disable. In mixed mode, the user accesses the advanced features using I2C, but controls lane switching using the external pins. The main application of the AD8153 is to support redundancy on both the backplane side and the line interface side of a serial link. The device has unicast and bicast capability, so it is capable of supporting either 1 + 1 or 1:1 redundancy. Using a mixture of bicast and loopback modes, the AD8153 can also be used to test high speed serial links by duplicating the incoming data and transmitting it to the destination port and test equipment simultaneously. 1 Two ports active with no pre-emphasis. |
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