SuperLite 2.5V/3.3V 3.0GHZ DUAL 2 x 2 CML Micrel, Inc. SY55858U SuperLite CROSSPOINT SWITCH SY55858U W/INTERNAL TERMINATION FEATURES Guaranteed AC parameters over temperature: f > 3.0GHz (3Gbps) MAX SuperLite t / t < 120ps r f Within-device skew < 25ps DESCRIPTION Non-blocking switch architecture Configurable as dual 2:1 mux, dual 1:2 fanout buffer, The SY55858U is a low-voltage, high-speed dual 2 x 2 1:4 fanout buffer, quad buffer, or dual 2 x 2 switch crosspoint switch with a flexible input that accepts CML or PECL, and a 50 compatible differential CML (current- 50 compatible outputs mode logic) output. The non-blocking design allows any Unique input termination and V pin for DC-coupled T input to connect to any output. Varying the state of the and AC-coupled input signalsCML or PECL select inputs allows SY55858U to be used in backup, Fully differential inputs/outputs fault tolerant, protection and backplane distribution TTL/CMOS compatible control logic applications. The signal inputs (DA and DB ) have a unique Wide supply voltage range: 2.3V to 3.6V 01 01 internal termination design that allows access to the Wide operating temperature range: 40C to +85C termination network through V pins. This feature allows T Available in 32-pin EPAD-TQFP package the device to easily interface to other logic standards such as AC-coupled or DC-coupled PECL/LVPECL signals. For applications that require a single-channel 2 x 2 crosspoint, consider the SY55854. APPLICATIONS SONET/SDH optical transport Backplane redundancy Add-drop Multiplexers SuperLite is a trademark of Micrel, Inc. Rev.: D Amendment: /0 M9999-110705 1 Issue Date: November 2005 hbwhelp micrel.com or (408) 955-1690SuperLite Micrel, Inc. SY55858U PACKAGE/ORDERING INFORMATION (1) Ordering Information Package Operating Package Lead 32 31 30 29 28 27 26 25 Part Number Type Range Marking Finish DB1 1 24 GND VTB1 2 23 VCC SY55858UHI H32-1 Industrial SY55858UHI Sn-Pb /DB1 3 22 QA0 (2) Top View SY55858UHITR H32-1 Industrial SY55858UHI Sn-Pb SELB0 21 /QA0 4 EPAD-TQFP 20 VCC DB0 5 (3) SY55858UHG H32-1 Industrial SY55858UHG with Pb-Free H32-1 6 19 QA1 VTB0 Pb-Free bar-line indicator NiPdAu /DB0 7 18 /QA1 (2, 3) SELB1 8 17 VCC SY55858UHGTR H32-1 Industrial SY55858UHG with Pb-Free 9 1011 12 131415 16 Pb-Free bar-line indicator NiPdAu Notes: 1. Contact factory for die availability. Dice are guaranteed at T = 25C, DC Electricals only. A 2. Tape and Reel. 32-Pin EPAD-TQFP (H321) 3. Pb-Free package recommended for new designs. TRUTH TABLES SELA0 SELA1 QA0 QA1 Function 0 0 DA0 DA0 Fanout Buffer or Redundant Distribution 0 1 DA0 DA1 Dual Buffer or Crosspoint 1 0 DA1 DA0 Dual Buffer or Crosspoint 1 1 DA1 DA1 Fanout Buffer or Redundant Distribution Table 1. Input to Output Connectivity Crosspoint A SELB0 SELB1 QB0 QB1 Function 0 0 DB0 DB0 Fanout Buffer or Redundant Distribution 0 1 DB0 DB1 Dual Buffer or Crosspoint 1 0 DB1 DB0 Dual Buffer or Crosspoint 1 1 DB1 DB1 Fanout Buffer or Redundant Distribution Table 2. Input to Output Connectivity Crosspoint B M9999-110705 2 hbwhelp micrel.com or (408) 955-1690 GND SELA0 /DA1 VCC /QB0 VTA1 DA1 QB0 VCC SELA1 /DA0 /QB1 QB1 VTA0 VCC DA0