SY55854U 2 x 2 Protection Crosspoint Switch General Description The SY55854U is a fully differential, CML, 2 x 2-crosspoint switch. The non-blocking design allows any input to be SuperLite connected to any output. Varying the state of the select Features inputs allows SY55854U to be used in backup, fault Guaranteed f >2.5GHz over temperature tolerant, protection, and backplane distribution MAX applications. 2.3V to 5.7V power supply SY55854U inputs can be terminated with a single resistor Non-blocking switch architecture between the true and the complement pins of a given Guaranteed <15ps channel-to-channel skew input. Guaranteed <480ps propagation delay over temperature The SY55854U is a member of Micrels new SuperLite Configurable as 2:1 mux, 1:2 fan-out buffer, dual buffer, family of high-speed logic devices. This family features or 2 x 2 switch very small packaging, high signal integrity, and flexible supply voltage operation. Accepts CML, PECL, LVPECL inputs Datasheets and support documentation can be found on Fully differential inputs/outputs Micrels web site at: www.micrel.com. Source terminated CML outputs for fast edge rates Wide operating temperature range: 40C to +85C Available in a tiny 16-pin EPAD-QSOP package Functional Block Diagram Applications High-speed logic Data communications systems Wireless communications systems Telecom systems Backplane redundancy SuperLite is a registered trademark of Micrel, Inc. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. SY55854U (1) Ordering Information Package Temperature Lead Part Number Package Type Range Finish SY55854UYI Y16-1 Industrial 854U Sn-Pb (2) SY55854UYITR Y16-1 Industrial 854U Sn-Pb (3) 854U with Matte-Sn SY55854UYY Y16-1 Industrial Pb-Free bar-line indicator Pb-Free (2, 3) SY55854UYYTR Y16-1 Industrial 854U with Matte-Sn Pb-Free bar-line indicator Pb-Free Notes: 1. Contact factory for die availability. Dice are guaranteed at T = 25C, DC Electricals only. A 2. Tape and Reel. 3. Pb-Free package recommended for new designs. Pin Configuration 16-Pin EPAD-QSOP (Y16-1) Pin Description Pin Number Pin Name Pin Function 2, 3 D0, /D0 CML/PECL/LVPECL Input (Differential). This is one of the data inputs to the crosspoint. It will be switched either to the Q0 output, the Q1 output, both outputs, or neither output, depending on the state of the S0 and S1 inputs. 4, 5 S0, /S0 CML/PECL/LVPECL Input (Differential). This selects input chooses which data input switches to the Q0 output. S0 logic low selects the D0 input, while S0 logic high selects the B input. 6, 7 /D1, D1 CML/PECL/LVPECL Input (Differential). This is the other data input to the crosspoint. It will be switched either to the Q0 output, the Q1 output, both outputs, or neither output, depending on the state of the S0 and S1 inputs. 1, 8 GND Ground. 9, 16 VCC Power Supply. CML Output (Differential). This is the other output from the crosspoint. Input S1 selects 10, 11 Q1, /Q1 either the D0 or D1 input to be switched to this output. 12, 13 /S1, S1 CML/PECL/LVPECL Input (Differential). This select input chooses which data input switches to the Q1 output. S1 logic low selects the D0 input, while S1 logic high selects the D1 input. 14, 15 /Q0, Q0 CML Output (Differential). This is one output from the crosspoint. Input S0 selects either the D0 or the D1 input to be switched to this output. M9999-102711-G October 2011 2 hbwhelp micrel.com or (408) 955-1690