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| PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch Features * Dual 2x2 Crosspoint/Repeater Switch * Meets or Exceeds the Requirements of ANSI TIA/EIA-644-1995 * Designed for Signaling Rates up to 650 Mbit/s (325Mhz) * Operates from a single 3.3V Supply: -40C to 85C * Low-Voltage Differential Signaling with Output Voltages of 350mV into: - 100 load (PI90LV044) - 50 load Bus LVDS Signaling (PI90LVB044) * Accepts 350mV differential inputs * Wide common mode input range: 0.2V to 2.7V * Output drivers are high impedance when disabled or when VCC 1.5V * Inputs are open, short, and terminated fail safe * Propagation Delay Time: 3.5ns * ESD protection is 10kV on bus pins * Bus Pins are High Impedance when disabled or with VCC less than 1.5V * TTL Inputs are 5V Tolerant * Power Dissipation at 400 Mbit/s of 250mW * Packaging (Pb-free & Green available): - 28-pin QSOP (Q) - 28-pin TSSOP (L) Description The PI90LV044 and PI90LVB044 are monolithic dual 2x2 asynchronous crosspoint/repeater switches. The crosspoint function is based on a multiplexer tree architecture. Each 2x2 switch can be considered as a pair of 2:1 multiplexers that share the same inputs. The signal path through each switch is fully differential with minimal propagation delay. The signal path is unregistered, so no clock is required for the data inputs. The signal line drivers and receivers use Low Voltage Differential Signaling (LVDS) to achieve signaling rates as high as 650Mbps. The LVDS standard provides a minimum differential output voltage magnitude of 247 mV into a 100 load and receipt of 100 mV signals with up to 1V of ground potential difference between a transmitter and receiver. The PI90LVB044 doubles the output drive current to achieve LVDS levels with a 50 ohm load. The intended application of these devices is for loop-through and redundant channel switching for both point-to-point baseband (PI90LV044) and multipoint (PI90LVB044) data transmissions over controlled impedance media. Pin Configuration Block Diagram S0,S1 1A/1B 1DE/2DE 1Y/1Z 1B 1A S0 1DE S1 2A 2B 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VCC 1Y 1Z 2DE 2Z 2Y GND VCC 3Y 3Z 4DE 4Y 4Z GND 2A/2B 2Y/2Z 3A 3B S2 3DE S3 3A/3B 3Y/3Z 4A/4B S2/S3 4Y/4Z 3DE/4DE 4A 4B 1 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch MUX Truth Table Input S3, S1 0 0 1 1 S2, S0 0 1 0 1 1Y/1Z - 3Y/3Z 1A/1B - 3A/3B 2A/2B - 4A/4B 1A/1B - 3A/3B 2A/2B - 4A/4B Output 2T/2Z - 4Y/4Z 1A/1B - 3A/3B 2A/2B - 4A/4B 1A/1B - 3A/3B 2A/2B - 4A/4B Function Splitter Splitter Router Router Note: 1. Setting nDE to 0 will set Ouput nY/nZ to High Impedance. S1/S0 1A/1B 1DE/2DE 1Y/1Z Cross Point Router 2A/2B 2Y/2Z S3/S2 3A/3B 3DE/4DE 3Y/3Z Pass Through Router 4A/4B 4Y/4Z Router Options S1/S0 1A/1B 1DE/2DE 1Y/1Z Splitter A 2A/2B 2Y/2Z S3/S2 3A/3B 3DE/4DE 3Y/3Z Splitter B 4A/4B 4Y/4Z Splitter Options Figure 1. Possible Signal Routing 2 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch Absolute Maximum Ratings Over Operating Free-Air Temperature(1) Supply Voltage Range, VCC(1)....................................................................... -0.5V to 4V Voltage Range (DE, S0, S1) ...............................................................-0.5 to 6V Input Voltage Range, VI (A or B)..................................... -0.5V to VCC + 0.5V Electrostatic Discharge: A, B, Y, Z, and GND(2)......... Class 3, A: 16kV, B:600V All Pins..................................................... Class 3, A: 7kV, B:500V Storage Temperature Range ......................................................-65C to 150C Lead Temperature 1, 6 mm (1/16 inch) from case for 10 seconds........... 260C Notes: 1. Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to Absolute-Maximum-Rated conditions for extended periods may affect device reliability. 2. All voltage values, except differential I/O bus voltages, are with respect to ground terminal. 3. Tested in accordance with MIL-STD-883C Method 3015.7 Recommended Operating Conditions Min. Supply Voltage, VCC High-Level input voltage, VIH Low-Level input voltage, VIL Magnitude of Differential Input Voltage | VID | Common Mode input voltage, VIC (see figure 2) 0.1 | VID | 2 -40 S1 - S3, 1DE - 4DE 3.0 2 0.8 0.6 2.4 | VID | 2 C Nom. 3.3 Max. 3.6 Units V VCC - 0.8 Operating free-air Temperature, TA 85 3 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch 2.5 MAX at VCC > 3.15V VIC - Common-Mode Input Voltage - V 2 MAX at VCC = 3V 1.5 1 0.5 MIN 0 0.1 0.2 0.3 0.4 0.5 0.6 VID - Differential Input Voltage - V Figure 2. Common-Mode Input Voltage vs. Differential Voltage Receiver Electrical Characteristics Over Recommended Operating Conditions (unless otherwise noted) Symbol VITH+ VITHII II (OFF) Parameter Positive going differential input voltage threshold Negative going differential input voltage threshold Input current (A or B inputs) Power-off input current (A or B inputs) Test Conditions VCM = 1.2V VI = 0V VI = 2.4V VCC = 0V Min. -100 -2 -1.2 20 -20 A Typ.(1) Max. 100 Units mV 4 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch Receiver/Driver Electrical Characteristics Over Recommended Operating Conditions (unless otherwise noted) Symbol VOD VOD VOC(SS) VOC(SS) VOC(PP) Parameter Differential Output voltage magnitude Change in differential Output voltage magnitude between logic states Steady-state common-mode output voltage Change in steady-state common-mode output voltage between logic states Peak-to-peak common-mode output voltage No load ICC Supply Current RL = 100 (LV) RL = 50 (LVB) All Channels Disabled IIH IIL IOS IOZ IO(OFF) CIN High level input current Low level input current Short circuit output current High impedence output current Power off output current Input Capacitance DE S1, S2, S3, S4 DE S1, S2, S3, S4 VIH = 5 VIL = 0.8V VOY or VOZ = 0V, VOD = 0V VOD = 600mV VO - 0V or VCC VCC = 0V, VO = 3.6V S0 - S3, 1DE - 4DE 1.5 1.5 1.5 3 8 16 26 42 6 RL = 100 (LV) RL = 50 (LVB) Test Condition Min. 247 -50 1.062 -50 3 Typ.(1) 440 Max. 590 50 1.375 50 150 24 40 54 12 40 -3 -20 10 -10 25 25 40 pF nA nA A nA A mA mA mV V mV Units Note: 1. All typical values are at 25C and with a 3.3 supply 5 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch Differential Receiver to Driver Switching Characteristics Over Recommended Operating Conditions (unless otherwise noted) Symbol tPLH tPHL tsk(p) tr tf tPHZ tPLZ tPZH tPZL tPHL_R1_Dx tPLH_R1_Dx tPHL_R2_Dx tPLH_R2_Dx Notes: 1. All typical values are at 25C and with a 3.3 supply 2. These parametric values are measured over supply voltage and temperature ranges recommended for the device Parameter Differential propagation delay, low-to-high Differential propagation delay, high-to-low Pulse skew ( | tPHL = tPLH | ) Transition, low-to-high Transition, high-to-low LV044 LVB044 LV044 LVB044 Test Condition Min. Typ.(1) 4.0 4.0 0.25 Max. 6.0 6.0 0.3 1.5 1.3 1.5 1.3 10 10 10 10 95 95 95 95 Units CL = 10pF 1.0 0.8 1.0 0.8 4.0 4.3 3.0 2.0 - ns Propagation delay time, high-level-to-high-impedence output Propagation delay time, low-level-to-high-impedance output Propagation delay time, high-impedence to high-level output Propagation delay time, high-impdeence tolow-level output Channel-tochannel skew, receiver to driver(2) ps 6 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch Parameter Measurement Information DE A Y Pulse Generator R B Input (see Note A) D Z VOD RL (see Note B) CL = 10 pF (2 Places) (see Note C) VI(B) 1.4 V 1V VOD 0 VI(A) 100% 80% 20% 0% tf tr Notes: A. All input pulses are supplied by a generator having the following characteristics: tr or tf 1ns, pulse repetition rate (PRR) - 50 Mpps, pulse width = 10 0.2ns. B. RL = 100 or 50 1%. C. CL includes instrumentation and fixture capacitance within 6mm of the D.U.T. D. The measurement of VOC(PP) is made on test equipment with a -3dB bandwidth of at least 300 MHz. Figure 3. Test Circuit and Voltage Definitions for the Differential Output Signal DE A Y RL (see Note B) (2 Places) VI(B) 1.4 V 1V VOC(PP) (see Note D) Pulse Generator R B Input (see Note A) D Z VI(A) VOC CL = 10 pF (2 Places) (see Note C) VOC(SS) VCC Notes: A. All input pulses are supplied by a generator having the following characteristics: tr or tf 1ns, pulse repetition rate (PRR) - 50 Mpps, pulse width = 10 0.2ns. B. RL = 100 or 50 1%. C. CL includes instrumentation and fixture capacitance within 6mm of the D.U.T. D. The measurement of VOC(PP) is made on test equipment with a -3dB bandwidth of at least 300 MHz. Figure 4. Test Circuit and Definitions for the Driver Common-Mode Output Voltage 7 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch DE A Pulse Generator R D Y RL (see Note A) Z 10 pF 10 pF B VIB 1.4 V 0-V Differential VIA 1.2-V CM 1V tPLH tPHL VOZ 1.4 V 0-V Differential VOY 1.2-V CM 1V VOY - VOZ 80% 0-V Differential 20% tr tf Notes: A. RL = 100 or 50 1% B. All input pulses are supplies by a generator having the following characteristics: pulse repetition rate (PPR) = 50 Mpps, pulse width = 10 0.2ns. Figure 5. Differential Receiver to Driver Propagation Delay and Driver Transition Time Waveforms 8 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch DE 1 V or 1.4 V A R Y D Z RL/2 (see Note A) 1.2 V RL/2 (see Note A) 1.2 V B 2V DE 1.4 V 0.8 V tPZH tPHZ 1.4 V VOY or VOZ 1.25 V 1.2 V tPZL tPLZ 1.2 V VOY or VOZ Notes: 1.15 V 1 V A. RL = 100 or 50 1% B. All input pulses are supplied by a generator having the following characteristics: pulse repetition rate (PRR) = 0.5 Mpps, pulse width = 500 10ns. Figure 6. Enable and Disable Timing Circuit 9 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch Typical Characteristics PI90LV044 PI90LV044 3.5 HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT VCC = 3.3 V TA = 25C 4 LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT VCC = 3.3 V TA = 25C V OH - High-Level Ouptut Voltage - V 3 2.5 2 V OL - Low-Level Output Voltage - V 3 2 1.5 1 .5 0 1 -4 -3 -2 -1 0 0 0 2 4 6 IOH - High-Level Output Current - mA Figure 7 IOL - Low-Level Output Current - mA Figure 8 PI90LVB044 PI90LVB044 3.5 HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT VCC = 3.3 V TA = 25C 4 LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT VCC = 3.3 V TA = 25C V OH - High-Level Output Voltage - V V OL - Low-Level Output Voltage - V 3 2.5 2 3 2 1.5 1 .5 0 1 -8 -6 -4 -2 0 0 0 2 4 6 8 10 12 IOH - High-Level Output Current - mA Figure 9 IOL - Low-Level Output Current - mA Figure 10 10 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch Packaging Mechanical: 28-Pin QSOP (Q) 28 .008 0.20 MIN. 0.150 0.157 3.81 3.99 .008 .013 0.20 0.33 Guage Plane .010 0.254 1 Detail A .016 .035 0.41 0.89 .041 1.04 REF 0-6 .386 9.804 .394 10.009 .033 REF 0.84 1.35 .053 1.75 .069 .015 x 45 Detail A SEATING PLANE 0.41 .016 1.27 .050 .007 0.178 .010 0.254 .025 BSC 0.635 .008 0.203 .012 0.305 .004 0.101 .010 0.254 .228 .244 5.79 6.19 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS Packaging Mechanical: 28-Pin TSSOP (L) 28 .169 .177 4.3 4.5 .004 .008 1 0.09 0.20 .378 .386 9.6 9.8 .047 1.20 Max SEATING PLANE 0.45 .018 0.75 .030 .252 BSC 6.4 X.XX DENOTES CONTROLLING X.XX DIMENSIONS IN MILLIMETERS .0256 BSC 0.65 .007 .012 0.19 0.30 .002 .006 0.05 0.15 11 PS8485D 09/22/04 PI90LV044, PI90LVB044 LVDS Dual 2x2 Crosspoint/Repeater Switch Ordering Information Ordering Code PI90LV044Q PI90LV044QE PI90LV044L PI90LV044LE PI90LVB044Q PI90LVB044QE PI90LVB044L PI90LVB044LE Package Code Q Q L L Q Q L L Package Type 28-Pin 150-mil QSOP Pb-free & Green, 28-Pin 150-mil QSOP 28-pin 170-mil TSSOP Pb-free & Green, 28-pin 170-mil TSSOP 28-Pin 150-mil QSOP Pb-free & Green, 28-Pin 150-mil QSOP 28-pin 170-mil TSSOP Pb-free & Green, 28-pin 170-mil TSSOP Notes: 1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ 2. Number of Transistors = TBD Pericom Semiconductor Corporation * 1-800-435-2336 * www.pericom.com 12 PS8485D 09/22/04 |
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