854U

Micrel, Inc. 2 X 2 PROTECTION CROSSPOINT SWITCH SuperLite™ SY55854U SuperLite™ SY55854U FEATURES s s s s s s s s s s s Guaranteed fMAX >2.5GHz over temperature 2.3V to 5.7V power supply Non-blocking “switch architecture” Guaranteed 3.0V NC VCC X /X VCC ≤ 3.0V Figure 2. Hard Wiring a Logic “0” (1) Usage SY55854U is very versatile. Tying its select inputs in various ways varies its functionality. For example, tying the select inputs together turns SY55854U into a redundant distributor. Either input will be switched to both outputs simultaneously. This is very useful in redundant backplane applications. By cross-tying the select inputs, SY55854U becomes a true crosspoint, selecting between “straight through” and “cross connected” operation. Also, using the select inputs independently, SY55854U functions as two multiplexers. Setting the select inputs to static values turns SY55854U into a dual buffer, or a fan-out buffer. To make larger crosspoints, cascade SY55854U devices, either in a tree or in a Banyan structure, as appropriate for your application. M9999-041206 hbwhelp@micrel.com or (408) 955-1690 3 Micrel, Inc. SuperLite™ SY55854U TRUTH TABLE S0 0 0 1 1 CTL CTL S1 0 1 0 1 CTL /CTL Q0 D0 D0 D1 D1 Same Opposite Q1 D0 D1 D0 D1 Same Opposite Function Fan-Out Buffer Dual Buffer Dual Buffer Fan-Out Buffer Redundant Distribution Crosspoint CML TERMINATION All inputs accept the output from any other member of this family. All outputs are source terminated 100Ω CML differential drivers as shown in Figures 3 and 4. SY55854U expects the inputs to be terminated, and that good high vcc speed design practices be adhered to. SY55854U inputs are designed to accept a termination resistor between the true and complement inputs of a differential pair. 0402 form factor chip resistors will fit with some trace fanout. vcc vcc 50Ω 100Ω 100Ω 100Ω 100Ω 100Ω 50Ω 100Ω 50Ω 50Ω 100Ω 100Ω 100Ω 50Ω 50Ω 8mA 8mA SY55854U SY55854U Figure 3a. Differentially Terminated (50Ω Load CML Output) VCC Figure 3b. Individually Terminated (50Ω Load CML Output) 100Ω 100Ω 100Ω 200Ω 100Ω 8mA SY55854U Figure 4. M9999-041206 hbwhelp@micrel.com or (408) 955-1690 100Ω Load CML Output 4 Micrel, Inc. SuperLite™ SY55854U ABSOLUTE MAXIMUM RATINGS(1) Symbol VCC VIN VOUT TA TLEAD Tstore Rating Power Supply Voltage Input Voltage CML Output Voltage Operating Temperature Range Lead Temperature (soldering, 20 sec.) Storage Temperature Range Value –0.5 to +6.0 –0.5 to VCC +0.5 VCC –1.0 to VCC +0.5 –40 to +85 260°C –65 to +150 Unit V V V °C °C °C Note 1. Permanent device damage may occur if absolute maximum ratings are exceeded. This is a stress rating only and functional operation is not implied at conditions other than those detailed in the operational sections of this data sheet. Exposure to absolute maximum ratlng conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS VCC = 2.3V to 5.7V; GND = 0V TA = –40°C Symbol VCC ICC Parameter Power Supply Voltage Power Supply Current Min. 2.3 — Max. 5.7 60 2.3 — TA = 0°C Min. Max. 5.7 60 TA = +25°C Min. 2.3 — Max. 5.7 60 TA = +85°C Min. 2.3 — Max. 5.7 60 Unit V mA CML DC ELECTRICAL CHARACTERISTICS VCC = 2.3V to 5.7V; GND = 0V; TA = –40°C to +85°C(2) Symbol VID VIH VIL VOH VOL VOS Parameter Differential Input Voltage Input HIGH Voltage Input LOW Voltage Output HIGH Voltage Output LOW Voltage Output Voltage Swing(3) Min. 100 1.6 1.5 VCC – 0.020 VCC – 0.97 0.700 Typ. — — — VCC – 0.010 VCC – 0.825 0.800 0.400 0.200 100 Max. — VCC VCC – 0.1 VCC VCC – 0.660 0.950 Unit mV V V V V V No Load No Load No Load 100Ω Environment(5) 50Ω Environment(4) Condition RDRIVE Note 2. Note 3. Note 4. Note 5. Output Source Impedance Equilibrium temperature. 80 120 Ω Actual voltage levels and differential swing will depend on customer termination scheme. Typically, a 400mV swing is available in the 100Ω environment and a 200mV swing in the 50Ω environment. Refer to the “CML Termination” diagram for more details. See Figure 3a and 3b. See Figure 4. M9999-041206 hbwhelp@micrel.com or (408) 955-1690 5 Micrel, Inc. SuperLite™ SY55854U AC ELECTRICAL CHARACTERISTICS(1, 2) VCC = 2.3V to 5.7V; GND = 0V; TA = –40°C to +85°C Symbol fMAX tPD tSKEW tr tf Note 1. Note 2. Note 3. Parameter Max. Operating Frequency Propagation Delay, S0, S1, D0, D1 to Q0, Q1 Within-Device Skew(3) Part-to-Part Skew (Diff.) CML Output Rise/Fall Times (20% to 80%) Min. 2.5 — — — — Typ. — — — — — Max. — 400 15 100 150 Unit GHz ps ps ps Condition Specification for packaged product only. Tested using environment of Figure 3b, 50Ω load CML output. Worst case difference between Q0 and Q1 from either A or B, when both outputs come from the same input M9999-041206 hbwhelp@micrel.com or (408) 955-1690 6 Micrel, Inc. SuperLite™ SY55854U 16-PIN EPAD-QSOP (Y16-1) PIN 1 0.157 (3.99) 0.150 (3.81) DIMENSIONS: INCHES (MM) 0.009 (0.2286) REF 0.025 (0.635) BSC 0.0098 (0.249) 0.0040 (0.102) 0.012 (0.30) 0.008 (0.20) 0.0098 (0.249) 0.0075 (0.190) 45° 8° 0° SEATING 0.0688 (1.748) PLANE 0.0532 (1.351) 0.196 (4.98) 0.189 (4.80) 0.050 (1.27) 0.016 (0.40) 0.2284 (5.801) 0.2240 (5.690) MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 TEL USA + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2006 Micrel, Incorporated. M9999-041206 hbwhelp@micrel.com or (408) 955-1690 7